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Jan 3 2006 Service Manual LBP3460/3410/6280K Series LBP3460
Jan 3 2006
Service Manual
LBP3460/3410/6280K SeriesLBP3460
ApplicationThis manual has been issued by Canon Inc. for qualified persons to learn technical theory, installation, maintenance, and repair
of products. This manual covers all localities where the products are sold. For this reason, there may be information in this
manual that does not apply to your locality.
CorrectionsThis manual may contain technical inaccuracies or typographical errors due to improvements or changes in products. When
changes occur in applicable products or in the contents of this manual, Canon will release technical information as the need
arises. In the event of major changes in the contents of this manual over a long or short period, Canon will issue a new edition
of this manual.
The following paragraph does not apply to any countries where such provisions are inconsistent with local law.
TrademarksThe product names and company names used in this manual are the registered trademarks of the individual companies.
CopyrightThis manual is copyrighted with all rights reserved. Under the copyright laws, this manual may not be copied, reproduced or
translated into another language, in whole or in part, without the written consent of Canon Inc.
COPYRIGHT © 2001 CANON INC.Printed in Japan
CautionUse of this manual should be strictly supervised to avoid disclosure of confidential information.
Introduction
Symbols UsedThis documentation uses the following symbols to indicate special information:
Symbol Description
Indicates an item of a non-specific nature, possibly classified as Note, Caution, or Warning.
Indicates an item requiring care to avoid electric shocks.
Indicates an item requiring care to avoid combustion (fire).
Indicates an item prohibiting disassembly to avoid electric shocks or problems.
Indicates an item requiring disconnection of the power plug from the electric outlet.
Indicates an item intended to provide notes assisting the understanding of the topic in question.
Indicates an item of reference assisting the understanding of the topic in question.
Provides a description of a service mode.
Provides a description of the nature of an error indication.
Memo
REF.
Introduction
The following rules apply throughout this Service Manual:1. Each chapter contains sections explaining the purpose of specific functions and the relationship between electrical and mechanical systems with refer-
ence to the timing of operation.In the diagrams, represents the path of mechanical drive; where a signal name accompanies the symbol , the arrow indicates thedirection of the electric signal.The expression "turn on the power" means flipping on the power switch, closing the front door, and closing the delivery unit door, which results insupplying the machine with power.
2. In the digital circuits, '1'is used to indicate that the voltage level of a given signal is "High", while '0' is used to indicate "Low".(The voltage value, how-ever, differs from circuit to circuit.) In addition, the asterisk (*) as in "DRMD*" indicates that the DRMD signal goes on when '0'.In practically all cases, the internal mechanisms of a microprocessor cannot be checked in the field. Therefore, the operations of the microprocessorsused in the machines are not discussed: they are explained in terms of from sensors to the input of the DC controller PCB and from the output of theDC controller PCB to the loads.
The descriptions in this Service Manual are subject to change without notice for product improvement or other purposes, and major changes will be com-municated in the form of Service Information bulletins.All service persons are expected to have a good understanding of the contents of this Service Manual and all relevant Service Information bulletins and beable to identify and isolate faults in the machine."
Contents
Contents
Chapter 1 PRODUCT DESCRIPTION
1.1 Features .....................................................................................................................................................1- 11.1.1 Features ..................................................................................................................................................................1- 1
1.2 System Construction ..................................................................................................................................1- 11.2.1 System Configuration ..............................................................................................................................................1- 1
1.3 Product Specifications ................................................................................................................................1- 11.3.1 Machine Specifications............................................................................................................................................1- 1
1.4 Name of Parts.............................................................................................................................................1- 31.4.1 External View...........................................................................................................................................................1- 31.4.2 Cross Section ..........................................................................................................................................................1- 4
1.5 Using the Machine......................................................................................................................................1- 51.5.1 Control Panel...........................................................................................................................................................1- 5
1.6 Safety .........................................................................................................................................................1- 61.6.1 Safety of Laser Light................................................................................................................................................ 1- 61.6.2 CDRH Regulations ..................................................................................................................................................1- 61.6.3 Safety of Toner ........................................................................................................................................................1- 61.6.4 Handling the Laser Assembly.................................................................................................................................. 1- 6
Chapter 2 TECHNICAL REFERENCE
2.1 Functional Configuration.............................................................................................................................2- 12.1.1 Construction ............................................................................................................................................................2- 1
2.2 Basic Sequense..........................................................................................................................................2- 12.2.1 Basic Sequence of Operation.................................................................................................................................. 2- 12.2.2 Power-On Sequence ...............................................................................................................................................2- 1
2.3 LASER EXPOSURE SYSTEM ...................................................................................................................2- 22.3.1 Overview/Configuration ...........................................................................................................................................2- 2
2.3.1.1 Overview .................................................................................................................................................................................. 2- 22.3.2 Controlling the Laser Activation Timing ...................................................................................................................2- 3
2.3.2.1 Turning On and Off the Laser .................................................................................................................................................. 2- 32.3.3 Laser Control ...........................................................................................................................................................2- 4
2.3.3.1 APC Control ............................................................................................................................................................................. 2- 42.3.4 Laser Scanner Motor Control .................................................................................................................................. 2- 5
2.3.4.1 Overview .................................................................................................................................................................................. 2- 52.3.4.2 Scanner Motor Speed Control ................................................................................................................................................. 2- 52.3.4.3 Detecting a Fault in the Scanner Motor ................................................................................................................................... 2- 5
2.4 IMAGE FORMATION SYSTEM..................................................................................................................2- 62.4.1 Overview/Configuration ...........................................................................................................................................2- 6
2.4.1.1 Construction............................................................................................................................................................................. 2- 62.4.1.2 Printing Process....................................................................................................................................................................... 2- 62.4.1.3 Static Image Formation Block .................................................................................................................................................. 2- 72.4.1.4 Development Block .................................................................................................................................................................. 2- 82.4.1.5 Transfer Block.......................................................................................................................................................................... 2- 82.4.1.6 Fixing Block.............................................................................................................................................................................. 2- 92.4.1.7 Drum Cleaning Block ............................................................................................................................................................... 2- 9
2.4.2 High-Voltage Control .............................................................................................................................................2- 102.4.2.1 Outline.................................................................................................................................................................................... 2- 102.4.2.2 Generation of the Primary Charging Bias .............................................................................................................................. 2- 112.4.2.3 Generation of the Developing Bias ........................................................................................................................................ 2- 112.4.2.4 Generation of the Transfer Charging Bias ............................................................................................................................. 2- 112.4.2.5 Generating the Fixing Bias..................................................................................................................................................... 2- 122.4.2.6 Detecting the Presence/Absence of a Cartridge.................................................................................................................... 2- 12
Contents
2.5 PICKUP AND FEEDING SYSTEM........................................................................................................... 2- 122.5.1 Overview/Configuration..........................................................................................................................................2- 12
2.5.1.1 Outline.................................................................................................................................................................................... 2- 122.5.2 Detecting Jams ......................................................................................................................................................2- 13
2.5.2.1 Jam Detection Outline............................................................................................................................................................ 2- 132.5.2.2 Delay Jams ............................................................................................................................................................................ 2- 142.5.2.3 Stationary Jams ..................................................................................................................................................................... 2- 142.5.2.4 Other Jams ............................................................................................................................................................................ 2- 14
2.5.3 Cassette Pickup .....................................................................................................................................................2- 152.5.3.1 Pickup from the Cassette....................................................................................................................................................... 2- 15
2.5.4 Multi-purpose Pickup .............................................................................................................................................2- 152.5.4.1 Pickup from the Manual Feeder............................................................................................................................................. 2- 15
2.5.5 Duplex Feeding......................................................................................................................................................2- 152.5.5.1 Overview ................................................................................................................................................................................ 2- 152.5.5.2 Moving Paper in Duplexing Mode .......................................................................................................................................... 2- 16
2.6 EXTERNAL AND CONTROLS SYSTEM ................................................................................................. 2- 172.6.1 Fan.........................................................................................................................................................................2- 17
2.6.1.1 Controlling the Fan Motor ...................................................................................................................................................... 2- 172.6.2 Power Supply.........................................................................................................................................................2- 18
2.6.2.1 Power Supply......................................................................................................................................................................... 2- 182.6.2.2 Protective Functions .............................................................................................................................................................. 2- 19
2.7 ENGINE CONTROL SYSTEM ................................................................................................................. 2- 202.7.1 Video Controller .....................................................................................................................................................2- 20
2.7.1.1 Overview ................................................................................................................................................................................ 2- 202.7.1.2 Outline of the Block................................................................................................................................................................ 2- 20
2.7.2 Engine Controller ...................................................................................................................................................2- 212.7.2.1 Overview ................................................................................................................................................................................ 2- 21
2.8 FIXING UNIT/DELIVERY SYSTEM.......................................................................................................... 2- 232.8.1 Overview/Configuration..........................................................................................................................................2- 23
2.8.1.1 Outline.................................................................................................................................................................................... 2- 232.8.1.2 Major Components Inside the Fixing Assembly..................................................................................................................... 2- 23
2.8.2 Various Control Mechanisms.................................................................................................................................2- 242.8.2.1 Fixing Temperature Control ................................................................................................................................................... 2- 242.8.2.2 Protective Functions .............................................................................................................................................................. 2- 25
Chapter 3 DISASSEMBLY AND ASSEMBLY
3.1 EXTERNAL AND CONTROLS SYSTEM ................................................................................................... 3- 13.1.1 Rear Cover...............................................................................................................................................................3- 1
3.1.1.1 Preparing for the Removal of the Rear Cover.......................................................................................................................... 3- 13.1.1.2 Removing the Rear Cover ....................................................................................................................................................... 3- 1
3.1.2 Right Cover ..............................................................................................................................................................3- 13.1.2.1 Removing the Right Cover....................................................................................................................................................... 3- 1
3.1.3 Upper Right Cover ...................................................................................................................................................3- 13.1.3.1 Preparing for the Removal of the Upper Right Cover .............................................................................................................. 3- 13.1.3.2 Removing the Upper Right Cover ............................................................................................................................................ 3- 1
3.1.4 Front Right Cover.....................................................................................................................................................3- 13.1.4.1 Preparing for the Removal of the Front Right Cover................................................................................................................ 3- 13.1.4.2 Removing the Front Right Cover ............................................................................................................................................. 3- 1
3.1.5 Rear Right Cover .....................................................................................................................................................3- 13.1.5.1 Preparing for the Removal of the Rear Right Cover ................................................................................................................ 3- 13.1.5.2 Removing the Rear Right Cover .............................................................................................................................................. 3- 1
3.1.6 Lower Right Cover ...................................................................................................................................................3- 13.1.6.1 Preparing for the Removal of the Lower Right Cover .............................................................................................................. 3- 13.1.6.2 Removing the Lower Right Cover ............................................................................................................................................ 3- 1
3.1.7 Left Cover ................................................................................................................................................................3- 23.1.7.1 Preparing for the Removal of the Left Cover ........................................................................................................................... 3- 23.1.7.2 Removing the Left Cover ......................................................................................................................................................... 3- 2
3.1.8 Upper Cover.............................................................................................................................................................3- 2
Contents
3.1.8.1 Preparing for the Removal of the Upper Cover........................................................................................................................ 3- 23.1.8.2 Removing the Upper Cover ..................................................................................................................................................... 3- 2
3.1.9 Manual Feed Tray ................................................................................................................................................... 3- 23.1.9.1 Preparing for the Removal of the Manual Feeder Tray............................................................................................................ 3- 23.1.9.2 Removing the Manual Feeder Tray ......................................................................................................................................... 3- 2
3.1.10 Manual Feed Cover ...............................................................................................................................................3- 23.1.10.1 Preparing for the Removal of the Manual Feeder Cover Assembly....................................................................................... 3- 23.1.10.2 Removing the Manual Feeder Cover Assembly..................................................................................................................... 3- 2
3.1.11 Cartridge Cover .....................................................................................................................................................3- 23.1.11.1 Preparing for the Removal of the Cartridge Cover Assembly ................................................................................................ 3- 23.1.11.2 Removing the Cartridge Cover Assembly .............................................................................................................................. 3- 2
3.1.12 Drive Unit ...............................................................................................................................................................3- 33.1.12.1 Preparing for the Removal of the Drive Unit .......................................................................................................................... 3- 33.1.12.2 Removing the Drive Unit ........................................................................................................................................................ 3- 3
3.1.13 Engine Controller Unit............................................................................................................................................3- 33.1.13.1 Preparing for the Removal of the Engine Controller Assembly.............................................................................................. 3- 33.1.13.2 Removing the Engine Controller Assembly............................................................................................................................ 3- 3
3.1.14 Operation Panel Unit .............................................................................................................................................3- 33.1.14.1 Preparing for the Removal of the Control Panel Assembly.................................................................................................... 3- 33.1.14.2 Removing the Control Panel Assembly.................................................................................................................................. 3- 3
3.1.15 Engine controller board..........................................................................................................................................3- 43.1.15.1 Preparing for the Removal of the Engine Controller PCB ...................................................................................................... 3- 43.1.15.2 Removing the Engine Controller PCB.................................................................................................................................... 3- 4
3.1.16 Video Controller Board ..........................................................................................................................................3- 43.1.16.1 Preparing for the Removal of the Video Controller Board...................................................................................................... 3- 43.1.16.2 Removing the Video Controller Board.................................................................................................................................... 3- 4
3.1.17 High-voltage board ................................................................................................................................................ 3- 43.1.17.1 Preparing for the Removal of the High-Voltage Power Supply PCB...................................................................................... 3- 43.1.17.2 Removing the High-Voltage Power Supply Unit..................................................................................................................... 3- 5
3.1.18 Top sensor.............................................................................................................................................................3- 63.1.18.1 Preparing for the Removal of the Top of Page Sensor .......................................................................................................... 3- 63.1.18.2 Removing the Top of Page Sensor ........................................................................................................................................ 3- 6
3.1.19 Face-up Cover Sensor...........................................................................................................................................3- 63.1.19.1 Preparing for the Removal of the Face-Up Delivery Cover Sensor ....................................................................................... 3- 63.1.19.2 Removing the Face-Up Delivery Cover Sensor ..................................................................................................................... 3- 6
3.1.20 Door Switch ...........................................................................................................................................................3- 63.1.20.1 Preparing for the Removal of the Door Switch....................................................................................................................... 3- 63.1.20.2 Removing the Door Switch..................................................................................................................................................... 3- 6
3.1.21 Scanner Fan ..........................................................................................................................................................3- 63.1.21.1 Preparing for the Removal of the Scanner Fan...................................................................................................................... 3- 63.1.21.2 Removing the Scanner Fan ................................................................................................................................................... 3- 6
3.1.22 Fixing Fan ..............................................................................................................................................................3- 73.1.22.1 Preparing for the Removal of the Fixing Fan ......................................................................................................................... 3- 73.1.22.2 Removing the Fixing Fan ....................................................................................................................................................... 3- 7
3.2 LASER EXPOSURE SYSTEM ...................................................................................................................3- 73.2.1 Laser Scanner Unit..................................................................................................................................................3- 7
3.2.1.1 Preparing for the Removal of the Laser Scanner Unit ............................................................................................................. 3- 73.2.1.2 Removing the Laser Scanner Unit ........................................................................................................................................... 3- 7
3.3 IMAGE FORMATION SYSTEM..................................................................................................................3- 73.3.1 Transfer Charging Roller .........................................................................................................................................3- 7
3.3.1.1 Preparing for the Removal of the Transfer Charging Roller..................................................................................................... 3- 73.3.1.2 Removing the Transfer Charging Roller .................................................................................................................................. 3- 7
3.3.2 Memory Tag Contact Unit........................................................................................................................................3- 73.3.2.1 Preparing for the Removal of the Memory Tag Contact Unit ................................................................................................... 3- 73.3.2.2 Removing the Memory Tag Contact Unit................................................................................................................................. 3- 7
3.4 PICKUP AND FEEDING SYSTEM.............................................................................................................3- 83.4.1 Pickup Unit ..............................................................................................................................................................3- 8
3.4.1.1 Preparing for the Removal of the Pickup Assembly................................................................................................................. 3- 83.4.1.2 Removing the Pickup Assembly .............................................................................................................................................. 3- 8
Contents
3.4.2 Cassette Pickup Roller.............................................................................................................................................3- 83.4.2.1 Preparing for the Removal of the Cassette Pickup Roller........................................................................................................ 3- 83.4.2.2 Removing the Cassette Pickup Roller ..................................................................................................................................... 3- 8
3.4.3 Cassette Paper Sensor............................................................................................................................................3- 93.4.3.1 Preparing for the Removal of the Cassette Paper Sensor....................................................................................................... 3- 93.4.3.2 Removing the Cassette Paper Sensor..................................................................................................................................... 3- 9
3.4.4 Cassette Pickup solenoid.........................................................................................................................................3- 93.4.4.1 Preparing for the Cassette Pickup Solenoid ............................................................................................................................ 3- 93.4.4.2 Removing the Cassette Pickup Solenoid................................................................................................................................. 3- 9
3.4.5 Manual Pickup Roller ...............................................................................................................................................3- 93.4.5.1 Preparing for the Removal of the Manual Feeder Pickup Roller.............................................................................................. 3- 93.4.5.2 Removing the Manual Feeder Pickup Roller ........................................................................................................................... 3- 9
3.4.6 Manual Paper Sensor ............................................................................................................................................3- 103.4.6.1 Preparing for the Removal of the Manual Feeder Paper Sensor........................................................................................... 3- 103.4.6.2 Removing the Manual Feeder Paper Sensor......................................................................................................................... 3- 10
3.4.7 Multi-purpose Pickup Solenoid ..............................................................................................................................3- 103.4.7.1 Preparing for the Removal of the Manual Feeder Pickup Solenoid ....................................................................................... 3- 103.4.7.2 Removing the Manual Feeder Pickup Solenoid..................................................................................................................... 3- 10
3.4.8 Manual Separation Pad .........................................................................................................................................3- 103.4.8.1 Preparing for the Removal of the Manual Feeder Separation Pad ........................................................................................ 3- 103.4.8.2 Removing the Manual Feeder Separation Pad...................................................................................................................... 3- 10
3.4.9 Registration Shutter Unit........................................................................................................................................3- 103.4.9.1 Preparing for the Removal of the Registration Shutter Assembly.......................................................................................... 3- 103.4.9.2 Removing the Registration Shutter Assembly ....................................................................................................................... 3- 10
3.4.10 Main Motor ...........................................................................................................................................................3- 113.4.10.1 Preparing for the Removal of the Main Motor ...................................................................................................................... 3- 113.4.10.2 Removing the Main Motor .................................................................................................................................................... 3- 11
3.5 FIXING SYSTEM...................................................................................................................................... 3- 113.5.1 Fixing Unit ..............................................................................................................................................................3- 11
3.5.1.1 Preparing for the Removal of the Fixing Unit ......................................................................................................................... 3- 113.5.1.2 Removing the Fixing Unit....................................................................................................................................................... 3- 11
3.5.2 Fixing Film Unit ......................................................................................................................................................3- 123.5.2.1 Preparing for the Removal of the Fixing Film Unit ................................................................................................................. 3- 123.5.2.2 Removing the Fixing Film Unit ............................................................................................................................................... 3- 12
3.5.3 Fixing Pressure Roller............................................................................................................................................3- 123.5.3.1 Preparing for the Removal of the Fixing Pressure Roller....................................................................................................... 3- 123.5.3.2 Removing the Fixing Pressure Roller .................................................................................................................................... 3- 12
3.5.4 Delivery Sensor......................................................................................................................................................3- 123.5.4.1 Preparing for the Removal of the Delivery Sensor................................................................................................................. 3- 123.5.4.2 Remove the Delivery Sensor ................................................................................................................................................. 3- 12
3.5.5 Fixing Drive Motor..................................................................................................................................................3- 133.5.5.1 Preparing for the Removal of the Fixing Motor ...................................................................................................................... 3- 133.5.5.2 Removing the Fixing Motor .................................................................................................................................................... 3- 13
Chapter 4 MAINTENANCE AND INSPECTION
4.1 Periodically Replaced Parts ....................................................................................................................... 4- 14.1.1 Periodically Replaced Parts .....................................................................................................................................4- 1
4.2 Consumables ............................................................................................................................................. 4- 14.2.1 Consumable Parts ...................................................................................................................................................4- 1
4.3 Periodical Service....................................................................................................................................... 4- 14.3.1 Periodic Service .......................................................................................................................................................4- 1
4.4 Cleaning ..................................................................................................................................................... 4- 14.4.1 Cleaning...................................................................................................................................................................4- 1
Chapter 5 TROUBLESHOOTING
5.1 MEASUREMENT AND ADJUSTMENT...................................................................................................... 5- 1
Contents
5.1.1 Test Print ................................................................................................................................................................. 5- 15.1.1.1 Test Print.................................................................................................................................................................................. 5- 1
5.1.2 Mechanical Adjustment ...........................................................................................................................................5- 15.1.2.1 Checking the Pressure of the Pressure Roller (nip)................................................................................................................. 5- 1
5.2 SERVICE TOOLS.......................................................................................................................................5- 25.2.1 Solvents and Oils.....................................................................................................................................................5- 25.2.2 Special Tools ...........................................................................................................................................................5- 2
5.3 ERROR CODE TABLE...............................................................................................................................5- 25.3.1 Error Code ...............................................................................................................................................................5- 25.3.2 A4-XX_ERROR .......................................................................................................................................................5- 35.3.3 A5-XX_ERROR .......................................................................................................................................................5- 35.3.4 A7-XX_ERROR .......................................................................................................................................................5- 45.3.5 D7-XX_ERROR .......................................................................................................................................................5- 4
5.4 Version Up..................................................................................................................................................5- 45.4.1 Overview of Upgrading Work...................................................................................................................................5- 45.4.2 Construction of Firmware ........................................................................................................................................5- 45.4.3 Outline of the Service Support Tool........................................................................................................................5- 45.4.4 Registering the Firmware .......................................................................................................................................5- 55.4.5 Making Connections ................................................................................................................................................ 5- 75.4.6 The down load procedure of the system .................................................................................................................5- 9
5.5 Sevice Mode.............................................................................................................................................5- 115.5.1 PCL........................................................................................................................................................................5- 11
5.5.1.1 Overview ................................................................................................................................................................................ 5- 115.5.1.2 Service Mode ......................................................................................................................................................................... 5- 12
Chapter 6 APPENDIX
6.1 OUTLINE OF ELECTRICAL COMPONENTS ............................................................................................6- 16.1.1 Clutch/Solenoid .......................................................................................................................................................6- 1
6.1.1.1 Solenoid ................................................................................................................................................................................... 6- 16.1.2 Motor .......................................................................................................................................................................6- 2
6.1.2.1 Motor........................................................................................................................................................................................ 6- 26.1.3 Fan ..........................................................................................................................................................................6- 2
6.1.3.1 Fan........................................................................................................................................................................................... 6- 26.1.4 Sensor .....................................................................................................................................................................6- 3
6.1.4.1 Sensor...................................................................................................................................................................................... 6- 36.1.5 Switch ......................................................................................................................................................................6- 4
6.1.5.1 Switch ...................................................................................................................................................................................... 6- 46.1.6 Lamps, Heaters, and Others ...................................................................................................................................6- 4
6.1.6.1 Heater ...................................................................................................................................................................................... 6- 46.1.7 PCBs .......................................................................................................................................................................6- 5
6.1.7.1 PCBs........................................................................................................................................................................................ 6- 5
Contents
Chapter 1 PRODUCT DESCRIPTION
Contents
Contents
1.1 Features ..........................................................................................................................................................................1-11.1.1 Features ........................................................................................................................................................................................ 1-1
1.2 System Construction ......................................................................................................................................................1-11.2.1 System Configuration .................................................................................................................................................................. 1-1
1.3 Product Specifications....................................................................................................................................................1-11.3.1 Machine Specifications ................................................................................................................................................................ 1-1
1.4 Name of Parts.................................................................................................................................................................1-31.4.1 External View .............................................................................................................................................................................. 1-31.4.2 Cross Section ............................................................................................................................................................................... 1-4
1.5 Using the Machine .........................................................................................................................................................1-51.5.1 Control Panel ............................................................................................................................................................................... 1-5
1.6 Safety .............................................................................................................................................................................1-61.6.1 Safety of Laser Light ................................................................................................................................................................... 1-61.6.2 CDRH Regulations ...................................................................................................................................................................... 1-61.6.3 Safety of Toner ............................................................................................................................................................................ 1-61.6.4 Handling the Laser Assembly ...................................................................................................................................................... 1-6
Chapter 1
1-1
1.1 Features
1.1.1 Features0010-8953
1.High-Speed PrinterThe machine is capable of printing as many as 35 pages per minute (LTR) at a resolution of 600 dpi.
2.Short Wait Time and Low Power ConsumptionThe machine uses an on-demand fixing method, in which its heater is turned on only when printing is under way, thus bringing about a short wait time and a lowrate of power consumption.
3.Large-Volume, Continuous PrintingIn addition to the 250-sheet cassette that comes as standard, the machine is designed to accommodate the Paper Feeder PF-36 (optional) to offer a source of paperthat can hold up to 850 sheets (64 g/m2), enabling large-volume, continuous printing.
4.Auto DuplexingThe machine has a built-in duplexing mechanism so that double-sided prints may be made automatically.
5.Support of PCL6The machine uses PCL5e and PCL6 from Hewlett-Packard as its page description language (PDL), permitting printing from various PCL-enabled applications.
1.2 System Construction
1.2.1 System Configuration0011-4523
The following shows the system configuration of the machine:
F-1-1T-1-1
1.3 Product Specifications
1.3.1 Machine Specifications0010-9030
[1] 500-sheet paper feeder (PF-36)[2] SRAM DIMM (64/128/256 MB)
Body installation method desktop page printerPhotosensitive medium OPC drumExposure method semiconductor laserDevelopment method Development methodTransfer method by rollerSeparation method by curvatureCassette pickup method by padMultifeeder pickup method by padDrum cleaning method by bladeFixing method on-demandDelivery method face-down/face-upToner supply type by toner cartridge
about 6000 prints (A4, single-sided; at 5% image ratio)Warm-up time in standby: 0 sec (at power-on: 9 sec or less)Print area top: 5 mm; bottom: 5 mm; left/right: 5 mm (if envelope, top, bottom, left,
right: 10 mm)Printing resolution 600dpiFirst print time 8 sec or less (approx.; A4)Print speed (A4) 33 pages/min (approx.)Print speed(LTR) 35 pages/min (approx.)
[1]
[2]
Chapter 1
1-2
Cassette paper size A4, B5, A5, LGL, LTR, EXE, user-defined (148 to 215.9 mm wide, 210to 355.6 mm long)
Multi-purpose paper size A4, B5, A5, LGL, LTR, EXE, envelope (DL, COM10, C5, Monarch,B5), user-defined (762.2 to 215.9 mm wide, 127 to 355.6 mm long)
Duplex paper size A4, LGL, LTRCassette paper type plain paper (64 to 80 g/m2), heavy paper (90 to 120 g/m2), recycled
paper, label paperMulti-purpose paper type plain paper (64 to 80 g/m2), heavy paper (90 to 199 g/m2), recycled
paper, transparency, label paper, envelop (DL, COM10, C5, Monarch,B5)
Duplex paper type plain paper (64 to 80 g/m2), heavy paper (90 to 120 g/m2)Cassette capacity 250 sheets (approx.; plain paper, 64 g/m2)Multi-purpose capacity 100 sheets (approx.; plain paper, 64 g/m2)Delivery tray stack face-down: 250 sheets (approx.; plain paper, 64 g/m2); face-up: 75
sheets (approx.; plain paper, 64 g/m2)Memory 2 MB (internal; no optional memory available)Operating environment (Temperature range)
10 to 32.5 deg C
Operating environment (Humidity range)
20% to 80% RH
Noise 52dB or less (during printing; based on ISO9296; announced noiseemission)
Power supply rating 220 to 240 VAC, +/-10% (50/60 Hz, +/-2 Hz)Power consumption (Maximum) 1300W or less (approx.; 20 deg C; for input of rated power supply;
including peak value lasting 1 sec or more; body + feeder)Dimensions 445 (W) x 410 (D) x 273 (H) mmWeight printer: 16.1kgkg; toner cartridge: 1.3 kg if 6K type, 1.6 kg if 12K typeOption paper feeder, expansion RAM DIMM
Chapter 1
1-3
1.4 Name of Parts
1.4.1 External View0010-9052
F-1-2T-1-2
[1]Face-down tray [9] Face-down tray stopper[2]Front cover [10]Face-up tray[3]Control panel [11]LAN connector[4]Right cover [12]USB connector[5]Power switch [13]Expansion slot[6]Cassette [14]Power supply receptacle[7]Paper width guide plate[8]Manual tray feeder
[1][2] [3]
[4]
[5]
[6]
[8]
[9]
[7]
[10]
[11][12]
[13]
[14]
Chapter 1
1-4
1.4.2 Cross Section0010-9054
F-1-3T-1-3
[1]Delivery roller [10]Cassette pickup roller[2]Fixing film assembly [11]Re-pickup roller[3] Laser scanner assembly [12]Transport roller[4]Photosensitive drum [13]Transfer charging roller[5]Toner cartridge [14]Duplexing transport roller[6]Registration shutter [15]Skew roller[7]Manual feeder pickup roller [16]Pressure roller[8]Manual feeder separation pad [17]Fixing delivery roller[9]Cassette separation pad
[1] [2] [3] [4] [5] [6] [7] [8]
[9][10][11][12][13][14][15][16][17]
Chapter 1
1-5
1.5 Using the Machine
1.5.1 Control Panel0010-9067
F-1-4[1]DisplayShows printer status or settings of various functional menus.[2] Job lampon:Indicates that print data is being received or print data still remains in the host machine's memory.flashing:Indicates that print data is being processed.off:Indicates that no print data exists in memory.[3]Message lampon:Indicates that a fault has occurred in the printer, and the printer is not capable of printing.(if sleep mode has been turned on off-line, only this lamp will go on, with all others remaining off)off:Indicates that the printer is normal.[4]Job keyoff-line:Remains disabled in an off-line state.on-line:Shows a job menu.job menu in use:Brings back the previous menu (upper layer).[5]Settings keyoff-line:Shows the setup menu.on-line:Shows the setup menu. (In an on-line state, however, some settings are not available.)job menu in use:Shows menu items or settings. (A press on a selected setting will increase its value.)[6]OK keyoff-line:Remains disabled in an off-line state.on-line:Remains disabled in an off-line state.menu in use:brings up the next menu (lower layer). (On the bottommost menu, i.e., with a setting selected, the setting is accepted.[7]Feeder Selection keyoff-line:Shows the SELECT FEEDER menu.on-line:Shows the SELECT FEEDER menu.menu in use:Remains disabled.[8]Cancel Job keyoff-line/on-line:Cancels the current job if the Job lamp is on or flashing. Otherwise, it remains disabled.[9]Online keySets up a connection with a PC.Or, enables printing to resume by temporarily canceling the error that stopped the printing. (Some errors, however, cannot be cancelled.) The key contains an on-line lamp, indicating the following:on:Indicates the machine is in an on-line state (ready to receive print data from the connected PC).off:
OKUtility
Job
Settings
Reset
Feeder Selection
Cancel Job
Online
Ready Message Job
[1]
[2][3]
[4]
[5]
[6]
[8]
[9]
[7][10]
[11]
[12]
[13]
Chapter 1
1-6
Indicates an off-line state (not being able to receive print data from the connected PC).If the printer is in sleep mode, however, the on-line lamp is off even in an off-line state.[10]Indicator lamp at pickup sloton:Indicates that the pickup slot in question is selected.flashing:Indicates that there is no paper in the selected pickup slot, or that the cassette is not in place.off:Indicates that the pickup slot in question is not selected. Or, the paper feeder is not in place.[11]Reset keyoff-line:Shows the reset menu.on-line:Shows the reset menu.menu in use:brings up the next menu (lower layer). (On the bottommost menu, i.e., with a selected setting, the selected setting is accepted.)[12]Utility keyoff-line:Remains disabled in an off-line state.on-line:Shows the utility menu.menu in use:Shows a menu item or setting. If a setting is selected, a press on the key will decrease its value.[13]Ready keyon:Indicates that the machine is ready for printing. (If sleep mode has been activated on-line, only the Print Ready lamp (green) is on, with other lamps remaining off.)flashing:Indicates that self-diagnosis is under way or warm-up is under way.off:Indicates that the printer is not ready for printing.
1.6 Safety
1.6.1 Safety of Laser Light0010-9078
Laser light can be extremely hazardous to the human body.The machines laser scanning system is contained in a protective housing and external covers to prevent escape of laser light outside the machine. In other words,the user is free of laser-related hazards as long as the machine is being used for its intended purposes.
1.6.2 CDRH Regulations0010-9083
The Center for Devices and Radiological Health of the US Food and Drug Administration put into effect regulations concerning laser products on August 2, 1976.These regulations apply to products produced on and after August 1, 1976, and prohibit the sale of laser products without certification. The following is a label usedto certify compliance with the CDRH regulations, and all laser products to be sold in the US must bear this label.
F-1-5
1.6.3 Safety of Toner0010-9085
The machines toner is a non-toxic material made up of plastic, iron, and small amounts of dye.
Do not throw toner into fire.
Toner on Clothing or Skin1.Remove toner from clothing or skin, and wash with water.2.Do not use warm or hot water, which will cause the toner to turn jelly-like and fuse permanently with the fibers of clothing.3.Toner tends to react readily with vinyl. Do not bring it in contact.
1.6.4 Handling the Laser Assembly0010-9088
An invisible ray of laser light is used inside the laser scanner unit. Do not disassemble the unit, as exposure to laser light can cause the eye to suffer permanentdamage. The covers used on the laser scanner unit of the machines laser scanner assembly are identified with the following label.
Chapter 1
1-7
F-1-6
ATTENTION
VORSICHT
ATTENZIONE
PRECAUCION
VARO!
VARNING!
UNSICHTBARE LASERSTRAHLUNG. WENN ABDECKUNG GEOFFNET.NICHT DEM STRAHL AUSSETZEN.
RAYONNEMENT LASER INVISIBLE EN CAS D'O UVERTURE.EXPOSITION DANGEREUSE AU FAISCEAU.
INVISIBLE LASER RADIATION WHEN OPEN.AVOID EXPOSURE TO BEAM.
Invisible laser radiation when open.AVOID DIRECT EXPOSURE TO BEAM.
RADIAZIONE LASER INVISIOILE IN CASO DI APERTURA.EVITARE L'ESPOSIZIONE AL FASCIO.
RADIACION LASER INVISIBLE CUANDO SE ABRE.EVITAR EXPONERSE AL RAYO.
AVATTAESSA OLET ALTTIINA NAKYMATTOMALLELASERSATEILYLLE. ALA KATSO SATEESEEN.
OSYNLIG LASERSTRALNING NAR DENNA DEL AROPPNAD. BETRAKTA EJ STRALEN.
DANGER
CAUTION
Chapter 2 TECHNICAL REFERENCE
Contents
Contents
2.1 Functional Configuration ...............................................................................................................................................2-12.1.1 Construction ................................................................................................................................................................................. 2-1
2.2 Basic Sequense...............................................................................................................................................................2-12.2.1 Basic Sequence of Operation ....................................................................................................................................................... 2-12.2.2 Power-On Sequence..................................................................................................................................................................... 2-1
2.3 LASER EXPOSURE SYSTEM.....................................................................................................................................2-22.3.1 Overview/Configuration .............................................................................................................................................................. 2-2
2.3.1.1 Overview .........................................................................................................................................................................................................2-22.3.2 Controlling the Laser Activation Timing..................................................................................................................................... 2-3
2.3.2.1 Turning On and Off the Laser .........................................................................................................................................................................2-32.3.3 Laser Control ............................................................................................................................................................................... 2-4
2.3.3.1 APC Control....................................................................................................................................................................................................2-42.3.4 Laser Scanner Motor Control....................................................................................................................................................... 2-5
2.3.4.1 Overview .........................................................................................................................................................................................................2-52.3.4.2 Scanner Motor Speed Control .........................................................................................................................................................................2-52.3.4.3 Detecting a Fault in the Scanner Motor ..........................................................................................................................................................2-5
2.4 IMAGE FORMATION SYSTEM .................................................................................................................................2-62.4.1 Overview/Configuration .............................................................................................................................................................. 2-6
2.4.1.1 Construction ....................................................................................................................................................................................................2-62.4.1.2 Printing Process...............................................................................................................................................................................................2-62.4.1.3 Static Image Formation Block ........................................................................................................................................................................2-72.4.1.4 Development Block.........................................................................................................................................................................................2-82.4.1.5 Transfer Block.................................................................................................................................................................................................2-82.4.1.6 Fixing Block....................................................................................................................................................................................................2-92.4.1.7 Drum Cleaning Block .....................................................................................................................................................................................2-9
2.4.2 High-Voltage Control ................................................................................................................................................................ 2-102.4.2.1 Outline...........................................................................................................................................................................................................2-102.4.2.2 Generation of the Primary Charging Bias .....................................................................................................................................................2-112.4.2.3 Generation of the Developing Bias ...............................................................................................................................................................2-112.4.2.4 Generation of the Transfer Charging Bias ....................................................................................................................................................2-112.4.2.5 Generating the Fixing Bias............................................................................................................................................................................2-122.4.2.6 Detecting the Presence/Absence of a Cartridge ............................................................................................................................................2-12
2.5 PICKUP AND FEEDING SYSTEM...........................................................................................................................2-122.5.1 Overview/Configuration ............................................................................................................................................................ 2-12
2.5.1.1 Outline...........................................................................................................................................................................................................2-122.5.2 Detecting Jams ........................................................................................................................................................................... 2-13
2.5.2.1 Jam Detection Outline...................................................................................................................................................................................2-132.5.2.1.1 Outline...................................................................................................................................................................................................2-13
2.5.2.2 Delay Jams ....................................................................................................................................................................................................2-142.5.2.2.1 Pickup Delay Jam..................................................................................................................................................................................2-142.5.2.2.2 Delivery Delay Jam...............................................................................................................................................................................2-14
2.5.2.3 Stationary Jams .............................................................................................................................................................................................2-142.5.2.3.1 Pickup Stationary Jam...........................................................................................................................................................................2-142.5.2.3.2 Delivery Stationary Jam........................................................................................................................................................................2-14
2.5.2.4 Other Jams.....................................................................................................................................................................................................2-142.5.2.4.1 Fixing Assembly Wrap Jam ..................................................................................................................................................................2-142.5.2.4.2 Machine Inside Residual Jam................................................................................................................................................................2-142.5.2.4.3 Duplexing Reversal Jam........................................................................................................................................................................2-142.5.2.4.4 Duplexing Re-Pickup Jam.....................................................................................................................................................................2-142.5.2.4.5 Door Open Jam......................................................................................................................................................................................2-15
2.5.3 Cassette Pickup .......................................................................................................................................................................... 2-152.5.3.1 Pickup from the Cassette...............................................................................................................................................................................2-15
2.5.4 Multi-purpose Pickup................................................................................................................................................................. 2-15
Contents
2.5.4.1 Pickup from the Manual Feeder.................................................................................................................................................................... 2-152.5.5 Duplex Feeding.......................................................................................................................................................................... 2-15
2.5.5.1 Overview....................................................................................................................................................................................................... 2-152.5.5.2 Moving Paper in Duplexing Mode ............................................................................................................................................................... 2-16
2.6 EXTERNAL AND CONTROLS SYSTEM ............................................................................................................... 2-172.6.1 Fan.............................................................................................................................................................................................. 2-17
2.6.1.1 Controlling the Fan Motor ............................................................................................................................................................................ 2-172.6.2 Power Supply ............................................................................................................................................................................. 2-18
2.6.2.1 Power Supply ................................................................................................................................................................................................ 2-182.6.2.1.1 Low-Voltage Power Supply Circuit ..................................................................................................................................................... 2-18
2.6.2.2 Protective Functions ..................................................................................................................................................................................... 2-192.6.2.2.1 Protective Mechanisms ......................................................................................................................................................................... 2-19
2.7 ENGINE CONTROL SYSTEM ................................................................................................................................. 2-202.7.1 Video Controller ........................................................................................................................................................................ 2-20
2.7.1.1 Overview....................................................................................................................................................................................................... 2-202.7.1.2 Outline of the Block...................................................................................................................................................................................... 2-20
2.7.2 Engine Controller....................................................................................................................................................................... 2-212.7.2.1 Overview....................................................................................................................................................................................................... 2-21
2.8 FIXING UNIT/DELIVERY SYSTEM ....................................................................................................................... 2-232.8.1 Overview/Configuration ............................................................................................................................................................ 2-23
2.8.1.1 Outline .......................................................................................................................................................................................................... 2-232.8.1.2 Major Components Inside the Fixing Assembly .......................................................................................................................................... 2-23
2.8.2 Various Control Mechanisms .................................................................................................................................................... 2-242.8.2.1 Fixing Temperature Control ......................................................................................................................................................................... 2-24
2.8.2.1.1 Controlling the Heater Temperature ..................................................................................................................................................... 2-242.8.2.2 Protective Functions ..................................................................................................................................................................................... 2-25
2.8.2.2.1 Protective Mechanisms ......................................................................................................................................................................... 2-252.8.2.2.2 Error Detection...................................................................................................................................................................................... 2-25
Chapter 2
2-1
2.1 Functional Configuration
2.1.1 Construction0010-9105
The machine may broadly be divided into the following functional blocks: engine control block, laser exposure system, image formation system, pickup/transportsystem, fixing/delivery system, and externals/auxiliary control system.
F-2-1
2.2 Basic Sequense
2.2.1 Basic Sequence of Operation0010-9122
The machine's sequence of operation is controlled by the CPU on the DC controller PCB. The following table provides an outline of machine operation occurringfrom when the power switch is turned on to when printing ends and motors stop, indicating the purposes of intervals and engine operation. For details of variousloads, see the timing chart.
T-2-1
2.2.2 Power-On Sequence0010-9123
The machine goes through the following sequence of operation between when the power is turned on to when it enters a standby state:1.power-on2.initializes the CPU3.starts video interface communication4.checks the inside for residual paper(checks the state (on or off) of sensors inside the machine to check the presence of paper)5.executes initial drive of the main motor
Interval Purpose RemarksWAIT(wait)
From when the power switch is turned on to when the initial operation of the main motor ends.
To eliminate the drum surface potential, and to clean the transfer charging roller.
During the interval, the machine checks the presence/absence of the cartridge.
STBY(standby)
From the end of a wait period or the end of last rotation to when the print command arrives; or, from when last rotation ends to when the power switch is turned on.
Keeps the machine ready for printing.
INTR(initial rotation)
From when the print command arrives from the video controller to when the pickup solenoid goes on.
Stabilizes the sensitivity of the photosensitive drum as part of preparation for printing; also, to clean the transfer charging roller.
PRINT(print)
From when initial rotation ends to when the paper lead edge sensor detects the trail edge of paper.
Forms an image on the surface of the photosensitive drum according to the video signal arriving from the video controller; then, transfers the resulting toner image to print paper.
LSTR(last rotation)
From the end of printing to when the fixing motor stops.
To fully discharge the last print sheet. In response to the print command from the video controller, the machine enters the initial rotation immediately after last rotation.
Pickup/transport systemEngine control
system
Laser exposure system
Image formation system
Fixing/delivery system
Externals/auxiliary control system
To external device (e.g., PC)
Chapter 2
2-2
(so that the fixing assembly reaches the target temperature (120 deg C))7.executes initial drive of the fixing motor8.executes high-voltage control(when the primary charging AC bias has gone on, a check is made to see the presence of the cartridge; also, executes transfer charging roller cleaning)9.checks for faults/errors10.executes memory tag communication
2.3 LASER EXPOSURE SYSTEM
2.3.1 Overview/Configuration
2.3.1.1 Overview0010-9737
The machine's laser/scanner system is used to form latent images on the surface of the photosensitive drum according to the video signals arriving from the videocontroller, and it consists of a laser driver PCB and a scanner motor.The components are integrated as a single unit, and are controlled by the engine controller.The following is a diagram of the laser/scanner assembly, followed by a description of its sequence of operation:
F-2-2The machines laser/scanner unit uses 2 laser diodes to draw 2 lines at the same time (high-speed laser scanning referred to as "2-beam method" ; see Notes).Its sequence of operation is as follows:1.In response to the print command from the formatter, the engine controller starts the scanner motor to rotate the 4-facet mirror.2.When the scanner motor starts to rotate, the engine controller forces the laser to go on using the laser control signal, thus starting scanner motor rotation control.3.The engine controller controls the scanner motor using the scanner motor speed control signal so that the motor will rotate at a specific speed.4.When the rotation of the scanner motor has reached the target speed, the formatter sends the video signal to the laser driver PCB.5.In response, the laser driver turns on the 2 laser diodes as dictated by the foregoing signals.
VDO1 /VDO1
Engine controller PCB
Video controller
/ACC /DEC
VDO2 /VDO2 /BD
/BDI CNT0 CNT1 CNT2
Four-sidedmirror
Cylindrical lens
Scanner motor
Focusing lens
Photsensitive drum
Reflecting mirror
BD sensor
Laserdriver PCB
Collimatorlens
Chapter 2
2-3
6.The 2 laser beams move through the collimator lens and the cylindrical lens to reach the 4-face mirror rotating at a specific speed.7.The laser beam reflected by the 4-facet mirror moves to the imaging lens and to the reflecting lens arranged in front of the 4-facet mirror to finally reach the surfaceof the photosensitive drum.9.When the photosensitive drum rotates at a specific speed and, in addition, the laser beam scans its surface, a static image starts to take shape.
2-Beam MethodMounted inside the laser unit are 2 laser diodes (LD1, LD2), designed to go on at the same time to draw 2 lines, thus enabling printing twice as much as would asingle diode operating at an identical speed.
F-2-3
2.3.2 Controlling the Laser Activation Timing
2.3.2.1 Turning On and Off the Laser0010-9738
The machine's laser control mechanism turns on and off the 2 laser diodes (LD1, LD2) in response to the laser control signal arriving from the engine controller.The following is a diagram of the mechanism:
LD1 scanning line
LD2 scanning line
Feed directionImage area
1st scanning line2nd scanning line3rd scanning line4th scanning line
Chapter 2
2-4
F-2-4The engine controller sends the following signals to the logic circuit of the laser driver IC: video signals (VDO1, /VDO1, VDO2, /VDO2) used to form images andlaser control signals (CNT0, CNT1, CNT2) used to switch over laser operation mode.The laser driver IC executes laser control based on the combination of CNT0, CNT1, and CNT2 signals.The following table shows the possible combinations of the laser control signals (CNT0, CNT1, CNT2):
T-2-2
2.3.3 Laser Control
2.3.3.1 APC Control0010-9743
The machine uses the APC control mechanism to turn on the laser diode at a specific intensity. There are two APCs, one is the initial APC (Note 1) and the otheris the between-lines APC(Note 2). They are controlled by the laser driver in the same way.The following is the sequenceof this control.1.When the LASER CONTROL signals (CNT0, CNT1, CNT2) put into the LD1 APC mode, the laser driver allows the LD1 to emit light with APC.
Operation mode CNT2 CNT1 CNT0 Remarksdischarge mode L L L C812, C822 dischargedata output mode H H H used in normal printingLD1 APC mode L H L used in LD1 APCLD2 APC mode L L H used in LD2 APCLD1, LD2 forced activation H L L used in test printingLD1, LD2 forced deactivation L H H used in image making
PDLD1
CPU
VCC
IC401
LD2
/CNT0/CNT1/CNT2
C822C812
/BDI
VDO1/VDO1
VDO2/VDO2
GND
/BD
VDO1/VDO1
VDO2/VDO2
+5V
Logic circuit
Engine
controller PCB Laser driver PCB
Laser driver IC
LD1switching
circuit
Reference voltage
Comparator
Samplehold circuit
BD PCB
LD2switching
circuit
Comparator
Samplehold circuit
Video controller
Chapter 2
2-5
2.The light from LD1 is detected by the photodiode (PD), and its current is converted into voltage for comparison against the reference voltage (equivalent of thetarget laser intensity).3.The laser driver controls the laser current until the voltage is identical to the target intensity of LD1.4.Thereafter, when the laser control signal changes to LD forced deactivation mode, LD1 is forced to go off and the laser retains the adjusted laser intensity in C812.5.When the light intensity is adjusted for LD1, the laser control signal changes to LD2APCON mode and the laser driver causes LD2 to start APC emission. Then,as in the case of LD1, the laser intensity of LD2 is adjusted, and the result will be retained by C822.
Note 1:Initial APCIt is APC executed in the course of initial rotation, and is used to adjust the laser intensity.Note 2:Between-Lines APCIt is APC executed in the course of printing operation, and the laser intensity is adjusted for a single line before starting to write the line.
2.3.4 Laser Scanner Motor Control
2.3.4.1 Overview0010-9744
The machine rotates the scanner motor at a specific speed, making sure that the laser beam is directed accurately on the surface of the photosensitive drum.The following diagram shows the control circuit used for the scanner motor:
F-2-5
2.3.4.2 Scanner Motor Speed Control0010-9746
The machine uses the scanner motor speed control mechanism to make sure that the scanner motor rotates at a specific speed at all times.
The following is the sequence of control:1. When the scanner motor is starting up, the CPU sends the /ACC signal to the scanner driver IC to force the scanner motor to accelerate.2. At specific intervals, the CPU forces the laser to go on, and compares the cycle of the /DEC signal and that of the reference clocks so as to find out the revolutionof the scanner motor.3. When the revolution of the scanner motor exceeds a specific revolution, the CPU generates the /DEC signal to decelerate the scanner motor. Thereafter, the CPUcontrols the /ACC or /DEC signal until the revolution of the scanner motor is a specific revolution, thus controlling the rotation of the motor.
2.3.4.3 Detecting a Fault in the Scanner Motor0010-9747
The CPU monitors the /BDI signal to see if the scanner motor is rotating at a specific speed.In response to any of the following conditions, the CPU will identify the presence of an error, and communicates the fact to the video controller:1.Fault in the Scanner-the /BDI signal is not detected 1 sec after the end of forced acceleration of the scanner motor.-after the /BDI signal has been detected, the cycle of the /BDI signal does not reach 90% of a specific value within 14 sec.-after the /BDI signal has been detected and the cycle of the /BDI signal has reached 90% of a specific value, the cycle does not reach a specific value within 15 sec.2.Fault in BD-after the scanner motor has reached a specific revolution, the /BDI signal is not detected within 1.5 sec.-after the scanner motor has reached a specific revolution, the cycle of the /BDI signal is not as specified for 0.5 sec continuously.3.Error in BD
Engine controller PCB
BD sensor
Oscillator
Referenceclock
Frequencycomparator
Laser/Scanner unit
Integrationcircuit
M
Scanner driver IC
Scanner motor
X0
70
69
67
66
J11-13
NSMACC
NSMDEC
X1X401
IC401CPU
J12-4
J12-3
J12-2
J12-1
J201-19
J402-1
J402-2
J402-3
J402-4
/ACC
/DEC
/BDI
Drivecircuit
+24VA +24VA
Chapter 2
2-6
-the CPU does not detect the /BDI signal at a specific cycle while the /BD signal is being sent to the video controller.
2.4 IMAGE FORMATION SYSTEM
2.4.1 Overview/Configuration
2.4.1.1 Construction0010-9781
The image formation system is the core of the machine, and consists of the cartridge, transfer charging roller, and fixing assembly.Upon receipt of the print command, the engine controller drives the main motor and the fixing motor to rotate the photosensitive drum, developing cylinder, primarycharging roller, transfer charging roller, and pressure roller.Thereafter, the primary charging roller charges the surface of the photosensitive drum to a uniform negative potential and, at the same time, the laser diode emits alaser beam (modulated by the video signals VDO1, VDO2, /VDO1, /VDO2) against the surface of the photosensitive drum.The static image formed on the surface of the photosensitive drum turns the static image on the photosensitive drum into a visible, toner image, which will then betransferred to print paper by the work of the transfer charging roller.After transfer, the toner remaining on the photosensitive drum is cleaned by the cleaning blade, and the surface is then charged to a uniform potential by the primarycharging roller to prepare for the next static image.
F-2-6
2.4.1.2 Printing Process0010-9784
The printer goes through several printing processes to form images.These processes may broadly be divided into 5 blocks, consisting of 7 steps, at the end of which a permanent, toner image appears on print paper.The following diagrams show printing blocks and steps:
F-2-71.Static Image Formation BlockIn this block, a static image is formed on the surface of the photosensitive drum.
Laser/scanner unit
Cleaning blade
Photosensitivedrum
Primary charging roller
CartridgeBlade
Developing cylinder
Transfer chargingroller
Laser beam
Pressureroller
Fixing film unit
Engine controller PCBPrint command
VIDEO signals(VDO1,/VDO1,VDO2,/VDO2)
Video controller
FBPRlTRSDEV
Fixing unit
Drum cleaningblock
Transfer block
Electrostatic latent image formation block
Developing block
2. Laser beam exposure
Fixing block
6. Fixing
Paper delivery
5. Separation 4. Transfer
7. Drum cleaning
3. Development
1. Primary charging
Paper path
Rotational direction of thedrum
Pick-up
Chapter 2
2-7
step 1:primary charging (charges the surface of the photosensitive drum to a uniform, negative potential)step 2:laser beam exposure (forms a static image on the surface of the photosensitive drum)
2.Development BlockIn this block, toner is deposited over the static image on the surface of the photosensitive drum, thus turning it into a visible image.step 3:development
3.Transfer BlockIn this block, the toner image on the surface of the photosensitive drum is moved to print paper.step 4:transfer (the toner image is moved from the surface of the photosensitive drum to print paper)steps 5:separation (print paper is separated from the photosensitive drum)
4.Fixing BlockIn this block, the toner image is permanently fused to print paper.step 6:fixing
5.Drum Cleaning BlockIn this block, the toner remaining on the photopositive drum is removed.step 7:drum cleaning (residual toner sticking to the photosensitive drum is removed)
2.4.1.3 Static Image Formation Block0010-9787
This block consists of 2 steps, at the end of which a static image is formed on the surface of the photosensitive drum.The area of the surface of the photosensitive drum not exposed to the laser beam remains negatively charged, while the area exposed by the beam (light area) is ridof negative charges.The drum image formed by negative images, is not visible to the human eye and thus is known as a "latent" image.
F-2-8step 1:primary chargingIn this step, the surface of the photosensitive drum is charged to a negative potential to prepare for the formation of a static image. The machine uses the primarycharging roller to directly charge the surface of the drum.The primary charging roller is made of conducting rubber, and is given an AC bias as well as a DC bias so that the surface potential of the photosensitive drum willremain at a specific level.The DC bias is made to vary in keeping with the developing DC bias, which varies in response to the image density information signal from the video controller.
F-2-9step 2:laser beam exposureIn this step, a static image is formed on the surface of the photosensitive drum.When a laser beam scans the negatively charged surface of the photosensitive drum, the changes in the light area will become neutralized so that there will no longerbe negative potential, resulting in a static image.
0-100
-500
Time (t)
Sur
face
pote
ntia
l(V
)
Exposedarea
Laserbeamexposure(step 2)
Transfer(step 4)
Primarycharging(step 1)
Primarycharging(step 1)
Unexposedarea
Photosensitive drum
Primary chargingroller
AC bias
DC bias
Chapter 2
2-8
F-2-10
2.4.1.4 Development Block0010-9788
In this block, toner is deposited over the static image on the surface of the photosensitive drum to turn the static image into a visible, toner image. The machine usesa toner projection method, and its toner is a single-component toner.
F-2-11step 3:developmentIn this step, toner is deposited over the static image on the surface of the photosensitive drum.As shown, the developing cylinder consists of a fixed magnet and a cylinder that rotates around the magnet. The machine's developing assembly is made up of thedeveloping cylinder, rubber blade, and toner.The toner is primarily composed of magnetite, and held in place by the force of magnetism. The toner has insulating properties, and is charged to a negative potentialas a result of friction against the rotating cylinder.The area of the surface of the photosensitive drum exposed to the laser beam has a higher electrical charge than the negatively charged toner; as such, when the areacomes close to the layer of toner (carrying a negative charge), the difference in potential (i.e., between the drum and the cylinder) causes the toner to move and stickto the surface of the drum, thus turning the static image into a visible image.
2.4.1.5 Transfer Block0010-9789
This block consists of 2 steps, at the end of which the toner image is moved from the surface of the photosensitive drum to print paper.
step 4:transferIn this step, a positive charge is applied from the back of print paper to attract toner from the surface of the photosensitive drum.
Laser beam
Unexposed area Exposed area
Stirrer
Blade
Developing cylinderAC bias
DC bias
Photosensitivedrum
CylinderMagnet
Chapter 2
2-9
F-2-12step 5:separationIn this step, the print paper is removed from the photosensitive drum taking advantage of the rigidity of the paper.The machine uses a static eliminator to decrease the charge on the back of the print paper, thus reducing the static bonding of the paper and, consequently, facilitatingseparation.
F-2-13
2.4.1.6 Fixing Block0010-9790
The toner image transferred to paper in the transfer block simply remains on the paper owing to the work of static charge and, thus, can become disturbed quiteeasily. In this block, the printer paper and the toner on it are subjected to pressure and heat so that the toner will be permanently fused with the fibers of the paper.
step 6:fixingThe machine uses an on-demand method, which requires less heat than other methods. Typically, the method is characterized by a quick start-up, and the heaterneed not remain supplied with power during standby (thus a short wait time and less energy consumption).The potential of the fixing film is lower than that of the pressure roller, reducing the static attraction of the negatively charged toner on the print paper to the fixingfilm.
F-2-14
2.4.1.7 Drum Cleaning Block0010-9793
In this block, the residual toner on the surface of the photosensitive drum is scraped off by the cleaning blade and then collected in the waste toner case (photosen-sitive drum cleaning).Step 7: Drum cleaningThe cleaning blade scrapes off the leftover toner on the drum surface to be got ready for the next print. The waste toner is kept in the cleaner container.
Paper
Transfer charging roller
Photo-sensitive
drum
Paper
Transfer charging roller
Photo-sensitive
drum
Electrostaticeliminator
Fixing film Fixing heater
Paper
Toner
Pressure roller
Fixing film
TonerPaper
Pressure roller
Chapter 2
2-10
F-2-15
2.4.2 High-Voltage Control
2.4.2.1 Outline0010-9795
The high-voltage circuit serves to generate high voltage used to form images, and it consists of the primary charging bias circuit, developing bias circuit, and transfercharging bias circuit.The primary charging bias circuit generates DC and AC voltages, and applies a combination of these voltages on the primary charging roller.This circuit also serves to detect the presence/absence of cartridges.The developing bias circuit generates DC and AC voltages, and applies a combination of these voltages to the developing cylinder.All these circuits are controlled by instructions from the CPU (IC401) of the engine controller, and characterized as follows:
Cleaner container
Sweeper strip
Photo-sensitive
drum
Cleaning blade
Chapter 2
2-11
F-2-16
2.4.2.2 Generation of the Primary Charging Bias0010-9796
The primary charging bias (PR1) is used to charge the surface of the photosensitive drum to a uniform negative potential in preparation for the formation of an image.The bias is generated by 2 signals from the CPU: primary charging DC bias drive signal (PRDCCK), primary charging AC bias drive signal (PRACCK).The PRDCCK signal is a clock signal used for the generation of a DC bias, and the machine generates the primary charging DC bias based on this signal.The PRACCK signal, on the other hand, is a clock signal used for the generation of an AC signal, and the machine generates the primary charging AC bias basedon this signal.The primary charging roller receives a voltage which is a combination of the primary charging AC bias and the primary charging DC bias.The primary charging DC bias varies in keeping with the developing DC bias according to the tag value and the image density information coming from the videocontroller.
2.4.2.3 Generation of the Developing Bias0010-9797
The developing bias (DEV) is used to attract toner to the static image formed on the surface of the photosensitive drum.The bias is generated based on the developing AC bias drive signal (DVACCK) from the CPU.The DVACCK signal is a clock signal used to generate an AC bias, and the machine uses the signal to generate the developing AC bias.The developing DC bias is generated by the developing AC bias from by the developing AC bias generation circuit.The developing cylinder receives a voltage which is a combination of the developing DC bias and the developing AC bias.The developing DC bias varies in keeping with the primary charging DC bias according to the tag value and the image density information from the formatter.
2.4.2.4 Generation of the Transfer Charging Bias0010-9798
The transfer charging bias (TRS) is used to move toner from the surface of the photosensitive drum to print paper.
Developingcylinder
Photosensitivedrum
Primarycharging roller
Transfercharging roller
Pressureroller
Fixingfilm unit
PRI
TRS
DEV
IC401
CPU
DVDCPWM
TRNCK
TRFAD
TRPCK
PRDCCK
PRACCKIC501
Combined
Primary charging bias circuit
Enginecontroller PCB
CRGSNS
FB
IC502IC502
AC voltagegeneration
circuit
DC voltagegeneration
circuit
Combined
Developing bias circuit
IC601AC voltagegeneration
circuit
DC voltagegeneration
circuit
Transfer charging bias circuit
IC501
Negative voltagegeneratiion circuit
Positive voltagegeneratiion circuit
High-voltage power supply PCB
IC501TRPWM
IC501
PRACCHG
PRDCPWM
IC602IC602
DVACCK
DVACCHG
TNRLVL
Chapter 2
2-12
The bias is generated using 3 signals from the CPU: transfer positive bias drive signal (TRPCK), transfer negative bias drive signal (TRNCK), and transfer outputswitchover signal (TRPWM).The TRPCK signal is a clock signal used to generate a positive bias, and the machine uses the transfer positive bias with reference to this signal. The TRNCK signalis a clock signal used to generate a negative bias, and the machine generates the transfer negative bias using this signal. The transfer charging roller receives eithera transfer positive bias or a transfer negative bias.The CPU switches over the value of TRPWM according to the transfer current feedback signal (TRFAD) by way of constant current control. The transfer chargingroller receives 3 biases: cleaning bias, sheet-to-sheet bias, and print bias.-Cleaning BiasIn the course of a warm-up period or post rotation sequence, this bias is used to move the toner from the transfer charging roller to the photosensitive drum (clean-ing).-Sheet-to-Sheet BiasIn continuous mode, this bias is used to prevent adhesion of residual toner (remaining on the photosensitive drum) to the transfer charging roller. A transfer positivebias is applied to the transfer charging roller.-Print BiasAs part of printing sequence, this bias is used to move toner from the surface of the photosensitive drum to print paper.The transfer charging roller receives a transfer positive bias.
2.4.2.5 Generating the Fixing Bias0010-9801
The fixing bias is used to prevent adhesion of toner to the fixing film, and is the result of division of the primary charging DC bias.The bias is applied to the fixing film through a brush at the same time as the primary charging bias is applied to the primary charging roller.
2.4.2.6 Detecting the Presence/Absence of a Cartridge0010-9802
The presence/absence of a cartridge is checked by the CPU with reference to the voltage of the cartridge detection signal (i.e., GRGSNS, which serves as the feed-back signal of the primary charging AC bias).When the CPU sends the primary charging AC bias drive signal (PRACCK) and the AC generation circuit of the primary charging bias circuit generates the primarycharging AC bias, the primary charging bias circuit checks the level of voltage of the primary charging voltage applied to the primary charging roller, and sendsthe cartridge detection signal (CRGSNS) to the CPU in the form of feedback.The CPU checks the presence/absence of a cartridge by checking the voltage of the GRGSNS signal generated at the same time as the primary charging AC biasduring a wait period.
2.5 PICKUP AND FEEDING SYSTEM
2.5.1 Overview/Configuration
2.5.1.1 Outline0010-9821
The pickup/transport system serves to pick up and move print paper, and consists of various rollers.The machine possesses 2 pickup slots: cassette and manual feeder. It has 2 delivery slots: face-down tray and face-up tray.The engine controller controls 2 motors and 2 solenoids to drive various rollers.The paper path is equipped with sensors (lead edge sensor, delivery sensor; duplexing sensor, used only in duplexing mode) to check the arrival and passage of printpaper.The CPU of the engine controller identifies a jam if print paper does not reach or move past a specific sensor within a specific period of time, and communicatesthe fact to the video controller.In auto duplexing mode, the face-up cover must remain closed, and the face-up detection signal is used to find out if the cover is closed or open.The presence/absence of paper in the cassette or in the manual feeder is checked by the cassette paper sensor and the manual feeder paper sensor.The following diagram shows the relationship among the machine's motors, solenoids, and sensors:
Chapter 2
2-13
F-2-17M1: main motorM2: fixing motorSL1: manual feeder pickup solenoidSL2: cassette pickup solenoid
2.5.2 Detecting Jams
2.5.2.1 Jam Detection Outline
2.5.2.1.1 Outline
0010-9823The machine is equipped with the following sensors to check the presence/absence and movement of print paper:-paper lead edge sensor(PS901)-delivery sensor(SR2)-duplexing sensor(PS2)
M1
ENGINE CONTROLLER PCB
DU
PL
EX
sig
nal
(/D
UP
SN
S)
FAC
E-U
P C
OV
ER
sig
nal
(F
US
NS
)
FIX
ING
MO
TOR
DR
IVE
sig
nal
SL2
SL1
M2
CA
SS
ET
TE
PIC
K-U
P S
OL
EN
OID
DR
IVE
sig
nal
(C
ST
SL
)
MU
LTI-
PU
RP
OS
E T
RAY
PIC
K-U
P S
OL
EN
OID
DR
IVE
sig
nal
(M
PS
L)
TOP
OF
PA
GE
sig
nal
(/TO
PS
NS
)
CA
SS
ET
TE
PA
PE
R D
ET
EC
TIO
N s
ign
al (
/CS
TS
NS
)
DE
LIV
ER
Y s
ign
al (
PO
SN
S)
MA
IN M
OTO
R D
RIV
E s
ign
al
MU
LTI-
PU
RP
OS
E T
RAY
PA
PE
R D
ET
EC
TIO
N s
ign
al (
/MP
SN
S)
PS2
SR1
PS4
PS901SR2
PS902
only forinitial drive
Chapter 2
2-14
F-2-18The machine detects the presence of a jam with reference to the presence/absence of paper over a specific sensor at such times as programmed in the CPU.When the CPU detects a jam, the machine stops operation and, at the same time, communicates the presence of a jam to the video controller.
2.5.2.2 Delay Jams
2.5.2.2.1 Pickup Delay Jam
0010-9824The machine is equipped with a retry control mechanism used to execute retry operation to eliminate identification of a pickup delay jam caused by a pickup fault.If the paper lead edge sensor (PS901) does not detect the lead edge of paper within a specific period of time (T1) after the start of pickup, the CPU executes pickupoperation once if the source of paper is the manual feeder or twice if it is the cassette or an optional machine.Thereafter, if the paper lead edge sensor (PS901) does not detect the lead edge of print paper within a specific period of time (T1), the CPU will identify the conditionas a pickup delay jam.In the case of duplexing mode, the CPU will identify a pickup delay jam if the paper lead edge sensor (PS901) does not detect the lead edge of paper about 0.4 secafter the fixing motor has started to rotate in reverse for re-pickup.
T-2-3
2.5.2.2.2 Delivery Delay Jam
0010-9826The CPU will identify a delivery delay jam if the delivery sensor (SR2) does not detect the lead edge of print paper within about 1.3 sec after the paper lead edgesensor (PS901) has detected the lead edge of print paper.
2.5.2.3 Stationary Jams
2.5.2.3.1 Pickup Stationary Jam
0010-9825The CPU will identify a pickup stationary jam if the paper lead edge sensor (PS901) does not detect the trail edge of print paper within about 1.2 sec after it hasdetected its lead edge.
2.5.2.3.2 Delivery Stationary Jam
0010-9827The CPU will identify a delivery stationary jam if the delivery sensor (SR2) does not detect the trial edge of print paper within about 1.3 sec after the paper leadedge sensor (PS901) has detected the trail edge of print paper.
2.5.2.4 Other Jams
2.5.2.4.1 Fixing Assembly Wrap Jam
0010-9828The CPU will identify a wrap jam if the paper lead edge sensor (PS901) detects the lead edge of paper about 0.3 sec after the delivery sensor (SR2) has detectedthe lead edge of print paper but then the delivery sensor (SR2) does not detect the trail edge of print paper about 0.8 sec thereafter.
2.5.2.4.2 Machine Inside Residual Jam
0010-9829At the start of initial multiple rotation, the CPU will identify a machine inside jam if the paper lead edge sensor (PS901), the delivery sensor (SR2), or duplexingsensor (PS2) detects print paper at the start of initial multiple rotation.
2.5.2.4.3 Duplexing Reversal Jam
0010-9830The CPU will identify a duplexing reversal jam if the duplexing sensor (PS2) does not detect the lead edge of print paper within about 1.8 sec after the start ofreversal.
2.5.2.4.4 Duplexing Re-Pickup Jam
0010-9831The CPU will identify a duplexing re-pickup jam if the duplexing sensor (PS2) does not detect the trail edge of print paper within about 2.0 sec after it has detectedthe lead edge of print paper.
Manual feed pickup Cassette pickup Option pickupT1 (unit: sec) 1.8 3.0 3.7
PS901SR2
PS2
Chapter 2
2-15
2.5.2.4.5 Door Open Jam
0010-9837The CPU will identify a door open jam if the door is identified as being open while printing is under way.
Auto DeliveryAfter arrival of the print command connected to the video controller, if the paper lead edge sensor (PS901) detects print paper before the start of pickup operation,the CPU will immediately stop the drive to the high-voltage system, laser/scanner, and fixing heater and initiate discharge of print paper.
2.5.3 Cassette Pickup
2.5.3.1 Pickup from the Cassette0010-9839
The machine picks up sheets of paper from the cassette, making sure no more than a single sheet of paper is picked up at a time.The presence/absence of paper inside the cassette is checked by the cassette paper sensor.As a means of preventing multiple feeding of print paper, the machine uses slope separation and pad separation.The machine uses the following sequence to pick up paper from the cassette:
1.When the print command arrives from the formatter, the engine controller starts to rotate the main motor (M1)2.When the machine enters an initial rotation ready set (Note), the cassette pickup solenoid (SL2) goes on for about 0.2 sec. As a result, the rotation of the mainmotor reaches the cassette pickup roller to rotate the roller.3.The holding plate is held up by the force of a spring so that the stack of print paper is at a point of pickup. The edge of the print paper is kept flush as it lies againstthe inner wall of the cassette. The slope helps facilitate the separation of the 2nd and subsequent sheets of paper (slope separation).The single sheet of paper that has been picked up is then moved inside of the machine, with the separation pad serving to prevent multiple feeding with the help ofthe slope of the cassette wall.
F-2-19
Initial Rotation ReadyThe machine is in an initial rotation ready state when its main motor is rotating, the fixing temperature is at a specific level, and the scanner motor is rotating at aspecific revolution.
2.5.4 Multi-purpose Pickup
2.5.4.1 Pickup from the Manual Feeder0010-9840
The manual feeder mechanism feeds the sheet of paper placed in the manual feeder slot to the inside of the machine.The presence/absence of paper placed at the slot is checked by the manual feeder paper sensor.A separation pad is used to prevent multiple feeding.The following is the sequence of operation the machine uses to pick up paper:
1.When the print command arrives from the video controller, the engine controller turns on the main motor (M1).2.When the machine enters an initial rotation ready state, the manual feeder pickup solenoid (SL1) goes on for about 0.14 sec.3.The rotation of the manual feeder pickup roller moves the print paper into the machine, with the separation pad making sure that no more than a single sheet ofpaper is fed inside.
2.5.5 Duplex Feeding
2.5.5.1 Overview0010-9842
After printing on one side, the machine moves the print paper to the face-down tray.Thereafter, it moves the paper into the duplexing transport assembly to turn over the paper and print on the other side.
Paper
Separation pad
Cassette pick-up roller
Lifting plateSpring
[1]
[2]
[3]
Chapter 2
2-16
The following shows the flow of print paper in duplexing mode:
F-2-20
2.5.5.2 Moving Paper in Duplexing Mode0010-9843
In duplexing mode, print paper is used by the main motor.After being printed on its 1st side, the print paper is moved to the face-down tray.About 0.18 sec after the delivery sensor (SR2) has detected the trail edge of paper, the CPU removes the skew and sends the paper from the duplexing transportassembly to the registration roller.Thereafter, the 2nd side is printed, and the print paper is sent to the face-down tray.
Chapter 2
2-17
F-2-21
2.6 EXTERNAL AND CONTROLS SYSTEM
2.6.1 Fan
2.6.1.1 Controlling the Fan Motor0011-0092
The machine drives 2 fan motors in response to instructions from the CPU.The fan motor is a DC brushless motor with a built-in Hall element, and is constructed as part of the motor drive circuit.The CPU (IC401) turns on the fixing heater at the start of printing and, at the same time, causes pin No. 25 and pin No. 61 to go High to rotate the fan motor. Whenthe fan motor reaches a specific revolution, the fan lock detection signal (FANLOCK1, FANLOCK2) goes Low.The CPU assumes that the fan is rotating normally as long as FANLOCK1 and FANLOCK 2 remain Low. The CPU also rotates the fan motor for about 30 secafter printing ends and main motor stops; thereafter, it causes the No. 25 pin and the No. 61 pin to go Low to stop the fan motor.
[1]
[2]
[3]
Paper
Chapter 2
2-18
F-2-22The CPU will assume a fault in the fan motor in response to the following conditions, and communicate the fact and stop the fan:1. the fan clock detection signal (FANLOCK1, FANLOCK2) does not go Low within about 10 sec after the fan motor has started to rotate.2. while the fan motor is rotating, the fan lock detention signal (FANLOCK1, FANLOCK2) remains High continuously for 10 sec or more.
2.6.2 Power Supply
2.6.2.1 Power Supply
2.6.2.1.1 Low-Voltage Power Supply Circuit
0010-9804The low-voltage power supply circuit serves to convert AC power from the power outlet into DC power for supply to various loads.The AC power is supplied to the low-voltage power supply circuit of the engine controller when the power switch (SW101) is turned on.The AC power is then turned into the following to meet the requirements of the machine: +24VDC, +5DC, +3.3VDC. The +24VDC power is sent to the main motor,fixing motor, scanner motor, and solenoids as well as the high-voltage power supply circuit, while the +5V power is supplied to the video controller and the +3.3Vpower to the sensors and ICs of the video controller and engine controller.The +24VDC power may be +24V supplied by the low-voltage power circuit at all times or +24U supplied to the high-voltage power supply circuit.
J509-1
CPUIC401
+24V
25
24
FANON1
FANLOCK1
FM1
Scanner fan
+3.3V J509-3
J509-2
P05
P04
J512-161
73
FANON2
FANLOCK2
J512-3
J512-2
P42
P20
FM2
Fixing fan+24V
+3.3V
Engine controller PCB
Main fan motordrive circuit
Sub fan motordrive circuit
Chapter 2
2-19
F-2-23
2.6.2.2 Protective Functions
2.6.2.2.1 Protective Mechanisms
0010-9805The low-voltage power supply circuit is equipped with an overcurrent protective mechanism and an over-voltage protective mechanism used to automatically shutoff the output voltage to protect damage to the power supply circuit in the event of an error voltage (e.g., overcurrent caused by a short-circuit in a load).If the overcurrent protective mechanisms or the over-voltage protective mechanism has gone on and, as a result, the DC voltage for the low-voltage power supplycircuit has stopped, turn off the power, remove the cause of the fault, and then turn the power back on. (Be sure to wait for 2 min or more before turning the powerback on.)The 24V generation circuit is directly monitored by the controller IC (IC201) to detect overcurrent and over-voltage; the 3.3V generation circuit and the 5V gener-ation circuit, on the other hand, are equipped with a built-in overcurrent detection circuit.In the circuit are found fuse 1 (FU101) and fuse 2 (FU102), which will cut off the power (FU101 blowing) in response to an overcurrent in the AC line.
Inlet plug(INL101) Engine control PCB
Low-voltage powersupply circuit
CPU(IC401)
+5V
+3.3V
+24V
+24U
ACN
ACH
Zero crossdetection circuit
Power switch(SW101)
Fuse(FU101)
Noisefilter
Noisefilter
Fuse(FU102)
+24Vgeneration
circuit
+5Vgeneration
circuit
Overvoltagedetection circuit
Control IC(IC201)
+3.3Vgeneration
circuit
Transformer(T201)
Rectificationcircuit
Relay(RL101)
Fixing heaterTriac
Fixing heatersafety circuit
Door switch(SW501)
Fan motordrive circuit
High-voltagepower supply
circuit
Sensor
Solenoids
Motors
Fans
Laser/scannerunit
Sensors
Chapter 2
2-20
2.7 ENGINE CONTROL SYSTEM
2.7.1 Video Controller
2.7.1.1 Overview0011-0090
The video controller receives print information from external devices (e.g., host computer) through interface cables.Such print information contains commands used to exchange printer status and unique information as well as PDL data.The PDL data is converted into a display list by the display list generation circuit, and turned into bitmap data for output to the DC controller. A check may be madeon the printer status using an external device.
F-2-24
2.7.1.2 Outline of the Block0011-0091
F-2-25T-2-4
No. Name DescriptionIC1 SDRAM Retains image data.IC2IC3IC4IC9 EEPROM EEPROM for storage of various parametersIC16 Flash ROM ROM for storage of programsIC1009 ASIC system controlIC1010 CPU system controlIC1034 RTC circuit for clockIC1088 EEPROM EEPROM for MAC addressIC3004 Reset IC system resetIC1060
DC controller PCB
PDL data
Display List
Bitmap
Bitmap
PCL printer driver
Display list generation circui
Video controller PCB
Bit map conversionCompression/decompression circuit
ASIC (IC1009)
EEPROM(IC9) CPU(IC1010)
ROM(IC10)
Clock(IC1034)
NetworkI/F(IC1100)
USB interface
SDRAM(IC1,2,3,4)
External deviceNetwork
Chapter 2
2-21
F-2-26
2.7.2 Engine Controller
2.7.2.1 Overview0011-0087
consists of a memory tag circuit, fixing control circuit, high-voltage circuit, and fan motor drive circuit.
The following is a block diagram of the engine controller circuitry, consisting of the circuits that follow:
J1017
J1061
IC1100
IC1009
IC1034
IC16
IC1010
IC1014IC9
IC1
IC2
IC3
IC4
J5
J8
J3
J1
J2
BAT1001
IC1088
IC3004 IC1060
Chapter 2
2-22
F-2-27a. CPU (IC401)The CPU is a one-chip CPU consisting of a built-in ROM and RAM, and serves to control the machine operation for the following according to the control programsstored in ROM.1. controls printer sequence2. communicates with the video controller3. controls the high-voltage power supply PCB4. controls the laser/scanner5. controls the various sensors6. controls the various loads (e.g., motors, solenoids)7. controls the fixing control circuitb. Memory Tag CircuitThe memory tag circuit serves to write data to and read data from the memory tag of the cartridge according to the instructions from the CPU (ICD401).c. Fixing Control CircuitThe fixing control circuit executes temperature control of the fixing assembly according to the instructions from the CPU (ICD401).d. High-Voltage Power Supply CircuitThe high-voltage power supply circuit generates high-voltage power according to the instructions from the CPU (IC401).e. Low-Voltage Power Supply CircuitThe low-voltage power supply circuit generates DC power used by the machine when the power is turned on.f. Fan Motor Drive CircuitThe fan motor drive circuit drives the fan motor according to the instructions from the CPU (IC401).
High-voltagepower supply
circuit
Cartridge
Engine controller PCB
Video controllerr
Transfer chargingroller
Pressure roller
AC input
Fixing controlcircuit
Low-voltagepower
supply circuit
Main motor
Solenoid
SensorScanner motor
Laser driver
BD sensor
IC401
CPU
Sensor
Operation unit
Fixing motor
Fan motor drivecircuit
Sensor
Fan
Option
Memory tag Memory tagcircuit
Sensor
Fixing unit
Chapter 2
2-23
2.8 FIXING UNIT/DELIVERY SYSTEM
2.8.1 Overview/Configuration
2.8.1.1 Outline0010-9901
The fixing/delivery system consists of the fixing film unit, pressure roller, and delivery roller.The following is the sequence of operation:1. When the print command arrives from the video controller, the engine controller turns on the main motor. The drive of the motor is used to rotate the pressureroller at a speed 1/5 of normal speed (initial drive; Note). In about 0.7 sec, the fixing motor rotates; the source of the drive for the fixing roller is switched from themain motor to the fixing motor linked by a one-way clutch. Thereafter, the fixing motor rotates the pressure roller and the delivery roller at normal speeds.2. The print paper arriving from the pickup/transport system is moved through the fixing film unit and the pressure roller for fusion of toner.3. The print paper discharged by the fixing assembly turns on the delivery sensor (SR2) as it reaches the face-down tray or the face-up tray.
F-2-28T-2-5
The machine's fixing motor does not possess enough torque to execute initial drive of the pressure motor, hence the use of the main motor for initial drive andswitching to the fixing motor thereafter (i.e., when the roller starts constant rotation).
2.8.1.2 Major Components Inside the Fixing Assembly0011-0024
The following shows the major components found inside the fixing assembly:
F-2-29
[1]Pressure roller M1:main motor[2]Fixing film unit M2:fixing motor[3]Fixing delivery roller SR2:delivery sensor[4]Delivery roller
M1
M2
SR2
[1]
[4]
[2][3]
Fixing unitPressure roller
Sub thermistor(TH2)
Main thermistor(TH1)
Thermoswitch(TP1)
Fixing film unitFixing heater
(H1)
Chapter 2
2-24
T-2-6
2.8.2 Various Control Mechanisms
2.8.2.1 Fixing Temperature Control
2.8.2.1.1 Controlling the Heater Temperature
0011-0033The machine's heater temperature control mechanism checks the surface temperature of the fixing heater, and controls the drive signal of the fixing heater so thatthe temperature is identical to the target temperature.
F-2-30The surface of the fixing heater is monitored by the main thermistor (TH1) and the sub thermistor (TH2) found in the fixing heater.A rise in the surface temperature will cause the resistance of the respective thermistor to drop, causing the voltage of the fixing heater temperature detection signal
heater: the fixing heater has a single heater.fixing heater (H1) for heating the fixing film (ceramic heater)
thermistor: the fixing assembly has 2 thermistors:main thermistor (TH1): for control of the fixing heater temperature (contact type thermistor)sub thermistor (TH2): for control of the fixing heater temperature (contact type thermistor)
thermal switch: the fixing assembly has a single thermal switch.thermal switch (TP1): for detection of overheating in the fixing heater (contact type thermal switch)In the event of overheating of the heater, the contact of the thermal heater opens to cut off power to the heater.
FSRTH1
FSRD1
SSR101
RLYD
RL101
Fixing film unit
Thermoswitch(TP1)
+3.3V
+24V
Q105
+3.3V
IC503
+24V
Q106
+24V
+3.3V
IC401CPU
FSRTH2
FU101
Fixing heatersafety circuit
AC input
Engine controller PCB
Main thermistor(TH1)
Sub thermistor(TH2)
Fixing heater(H1)
Pressure roller
Fixing heaterdrive circuit
Fixing control circuit
2
3
1
16
7
Q101
39
42
38
45
+3.3V
IC202
J102
-2
J206
-2
J206
-3
J102
-1
J206
-4
J206
-1
Chapter 2
2-25
(FSRTH1) of the main thermistor to decrease. The voltage of the fixing heater temperature detection signal (FSRTH2) of the sub thermistor, on the other hand, willincrease.The CPU (IC401) of the engine controller monitors the voltages of the FSRTH1 and FSRTH2 signals, and generates the fixing heater drive signal (FSRD1) to suitthe changes in the voltage, turning on/off the phototriac coupler (SSR101) so that the temperature of the fixing heater remains at a specific level.
The machine uses the following 4 control mechanisms to suit the temperature of the fixing heater and the type of paper being used:1. start-up temperature control, used from when the print command reaches the engine controller to when the fixing heater reaches the target temperature.2. paper passage temperature control, used during printing so that the fixing heater is identical to the target temperature.The target temperature differs depending on the selected fixing mode, and may be any of 5 types.The following shows the relationship between 'paper type' setting (driver setting) and the paper size, print count, and the like.
T-2-7
3. sheet-to-sheet temperature control, used in continuous printing between sheets to prevent overheating of the fixing film by reducing the target temperature of thefixing heater.
4. down-sequence, used in continuous mode to prevent overheating of the edges of the heater.
In the case of continuous printing, the CPU of the engine controller monitors the reading of the sub thermistor and checks the length of the paper; as a result, ifspecific conditions exist, it starts long-narrow paper mode (Note) or small-size paper mode.When a shift to the mode occurs, the CPU forces the printing speed to decrease so that the distance between sheets will increase in continuous printing. The sensi-tivity of the thermistor mounted in the middle of the fixing heater will increase to check for overheating of the edges of the heater.The following shows the conditions that initiate the mode and its relationship to printing speed:
T-2-8
The term "long-narrow sheet" refers to a sheet that is narrow in width and long in length.
2.8.2.2 Protective Functions
2.8.2.2.1 Protective Mechanisms
0011-0085The machine is equipped with mechanisms that detect overheating of the fixing assembly and cut off power to the heater.1.protective function by the CPU2.protective function by the fixing heater safety circuit3.protective function by a thermistorThese mechanisms are as follows:1. Protective Function by the CPUThe CPU monitors the voltage of the main thermistor and the sub thermistor at all times, cutting off the power to the fixing heater when the fixing temperatureexceeds a specific level.If the temperature of the fixing heater increases abnormally and the voltage of the main thermistor drops to about 0.73 V or less (equivalent of 240 deg C) or thatof the sub thermistor is about 2.77 V or more (equivalent of 320 deg C), the CPU will cause the fixing heater drive signal (FSRD1) to go Low to turn off the pho-totriac coupler (SSR101), thus cutting off the power to the fixing heater.2. Protective Mechanism by the Fixing Heater Safety CircuitThe circuit monitors the voltage of the main thermistor and the sub thermistor at all times. If the fixing temperature increases in excess of a specific level, it willcut the power to the fixing heater regardless of the instructions for the CPU.If the temperature of the fixing heater rises abnormally and the voltage of the sub thermistor is about 2.84 V or more (equivalent of 316 deg C), the output of thecomparator (IC503) will go Low to turn off the transistor (Q105), thus turning off the relay (RL101) regardless of the relay drive signal (RLYD) from the CPU andultimately turning off the power to the fixing heater.Likewise, if the temperature of the fixing heater increases abnormally and the voltage of the sub thermistor is about 2.84 V or more (equivalent of 316 deg C), theoutput of the comparator (IC2202) will go Low to turn off the transistor (Q106), turning off the relay (RL101) regardless of the relay drive signal (RLYD) from theCPU and ultimately cutting off the power to the fixing heater.3. Protective Mechanism by a Thermal SwitchIf the temperature of the fixing heater rises abnormally and the temperature of the thermal switch exceeds about 250 deg C, the contact of the thermal switch opensto cut off the power to the fixing heater.
2.8.2.2.2 Error Detection
0011-0086The CPU will identify a fault in the fixing assembly in response to any of the conditions from 1. to 8., and turn off the relay (RL101) to cut off the power to theheater; at the same time, it will communicate the fact to the video controller:1. the reading of the main thermistor does not reach 50 deg C within about 1.5 sec after temperature control starts.2. the reading of the main thermistor is 240 deg C or more continuously for 1 sec.3. while normal temperature control is under way, the reading of the main thermistor is 100 deg C or less; while sheet-to-sheet temperature control is under way,the reading of the main thermistor is 55 deg C or less continuously for about 1.2 sec.4. the following condition has lasted continuously for 30 sec: the target temperature is 100 deg C or more and, in addition, the difference between the target tem-perature and the actual temperature is 50 deg C or more.5. at time of start-up, a temperature -5 deg C from the target temperature is not reached for 75 sec from the activation of the heater.6. the reading of the sub thermistor is 320 deg C or more continuously for about 2.6 sec.7. the reading of the main thermistor exceeds 50 deg C and, thereafter, the reading of the sub thermistor is less than 35 deg C continuously for 1 sec.8. the reading of the main thermistor exceeds 50 deg C and, thereafter, the reading of the main thermistor is 20 deg C or less continuously for 300 msec.
'paper type' selected using the driver Fixing target temperatureplain paper 215 to 210 deg C
plain paper L 205 to 210 deg Cheavy paper 1 220 to 225 deg Cheavy paper 2 215 to 225 deg C
special setting A 185 deg C
Down-sequence mode Paper length Sub thermistor temperature (deg C)
Printing speed (ppm)
Small-size paper mode 270 mm or less 250 deg C or more 18>12>8>6>5>4Long-narrow paper mode 270 mm or more 260 deg C or more 2
Chapter 3 DISASSEMBLY AND ASSEMBLY
Contents
Contents
3.1 EXTERNAL AND CONTROLS SYSTEM ..................................................................................................................3-13.1.1 Rear Cover ................................................................................................................................................................................... 3-1
3.1.1.1 Preparing for the Removal of the Rear Cover.................................................................................................................................................3-13.1.1.2 Removing the Rear Cover ...............................................................................................................................................................................3-1
3.1.2 Right Cover .................................................................................................................................................................................. 3-13.1.2.1 Removing the Right Cover..............................................................................................................................................................................3-1
3.1.3 Upper Right Cover ....................................................................................................................................................................... 3-13.1.3.1 Preparing for the Removal of the Upper Right Cover ....................................................................................................................................3-13.1.3.2 Removing the Upper Right Cover...................................................................................................................................................................3-1
3.1.4 Front Right Cover ........................................................................................................................................................................ 3-13.1.4.1 Preparing for the Removal of the Front Right Cover......................................................................................................................................3-13.1.4.2 Removing the Front Right Cover ....................................................................................................................................................................3-1
3.1.5 Rear Right Cover ......................................................................................................................................................................... 3-13.1.5.1 Preparing for the Removal of the Rear Right Cover.......................................................................................................................................3-13.1.5.2 Removing the Rear Right Cover .....................................................................................................................................................................3-1
3.1.6 Lower Right Cover ...................................................................................................................................................................... 3-13.1.6.1 Preparing for the Removal of the Lower Right Cover ....................................................................................................................................3-13.1.6.2 Removing the Lower Right Cover ..................................................................................................................................................................3-1
3.1.7 Left Cover .................................................................................................................................................................................... 3-23.1.7.1 Preparing for the Removal of the Left Cover..................................................................................................................................................3-23.1.7.2 Removing the Left Cover................................................................................................................................................................................3-2
3.1.8 Upper Cover................................................................................................................................................................................. 3-23.1.8.1 Preparing for the Removal of the Upper Cover ..............................................................................................................................................3-23.1.8.2 Removing the Upper Cover ............................................................................................................................................................................3-2
3.1.9 Manual Feed Tray ........................................................................................................................................................................ 3-23.1.9.1 Preparing for the Removal of the Manual Feeder Tray ..................................................................................................................................3-23.1.9.2 Removing the Manual Feeder Tray.................................................................................................................................................................3-2
3.1.10 Manual Feed Cover.................................................................................................................................................................... 3-23.1.10.1 Preparing for the Removal of the Manual Feeder Cover Assembly .............................................................................................................3-23.1.10.2 Removing the Manual Feeder Cover Assembly ...........................................................................................................................................3-2
3.1.11 Cartridge Cover.......................................................................................................................................................................... 3-23.1.11.1 Preparing for the Removal of the Cartridge Cover Assembly ......................................................................................................................3-23.1.11.2 Removing the Cartridge Cover Assembly ....................................................................................................................................................3-2
3.1.12 Drive Unit .................................................................................................................................................................................. 3-33.1.12.1 Preparing for the Removal of the Drive Unit................................................................................................................................................3-33.1.12.2 Removing the Drive Unit ..............................................................................................................................................................................3-3
3.1.13 Engine Controller Unit............................................................................................................................................................... 3-33.1.13.1 Preparing for the Removal of the Engine Controller Assembly ...................................................................................................................3-33.1.13.2 Removing the Engine Controller Assembly .................................................................................................................................................3-3
3.1.14 Operation Panel Unit.................................................................................................................................................................. 3-33.1.14.1 Preparing for the Removal of the Control Panel Assembly..........................................................................................................................3-33.1.14.2 Removing the Control Panel Assembly ........................................................................................................................................................3-3
3.1.15 Engine controller board.............................................................................................................................................................. 3-43.1.15.1 Preparing for the Removal of the Engine Controller PCB............................................................................................................................3-43.1.15.2 Removing the Engine Controller PCB..........................................................................................................................................................3-4
3.1.16 Video Controller Board.............................................................................................................................................................. 3-43.1.16.1 Preparing for the Removal of the Video Controller Board ...........................................................................................................................3-43.1.16.2 Removing the Video Controller Board .........................................................................................................................................................3-4
3.1.17 High-voltage board .................................................................................................................................................................... 3-43.1.17.1 Preparing for the Removal of the High-Voltage Power Supply PCB...........................................................................................................3-43.1.17.2 Removing the High-Voltage Power Supply Unit..........................................................................................................................................3-5
3.1.18 Top sensor .................................................................................................................................................................................. 3-63.1.18.1 Preparing for the Removal of the Top of Page Sensor..................................................................................................................................3-63.1.18.2 Removing the Top of Page Sensor................................................................................................................................................................3-6
Contents
3.1.19 Face-up Cover Sensor ................................................................................................................................................................ 3-63.1.19.1 Preparing for the Removal of the Face-Up Delivery Cover Sensor ............................................................................................................. 3-63.1.19.2 Removing the Face-Up Delivery Cover Sensor ........................................................................................................................................... 3-6
3.1.20 Door Switch ............................................................................................................................................................................... 3-63.1.20.1 Preparing for the Removal of the Door Switch ............................................................................................................................................ 3-63.1.20.2 Removing the Door Switch........................................................................................................................................................................... 3-6
3.1.21 Scanner Fan................................................................................................................................................................................ 3-63.1.21.1 Preparing for the Removal of the Scanner Fan............................................................................................................................................. 3-63.1.21.2 Removing the Scanner Fan ........................................................................................................................................................................... 3-6
3.1.22 Fixing Fan .................................................................................................................................................................................. 3-73.1.22.1 Preparing for the Removal of the Fixing Fan ............................................................................................................................................... 3-73.1.22.2 Removing the Fixing Fan ............................................................................................................................................................................. 3-7
3.2 LASER EXPOSURE SYSTEM.................................................................................................................................... 3-73.2.1 Laser Scanner Unit....................................................................................................................................................................... 3-7
3.2.1.1 Preparing for the Removal of the Laser Scanner Unit .................................................................................................................................... 3-73.2.1.2 Removing the Laser Scanner Unit .................................................................................................................................................................. 3-7
3.3 IMAGE FORMATION SYSTEM ................................................................................................................................ 3-73.3.1 Transfer Charging Roller ............................................................................................................................................................. 3-7
3.3.1.1 Preparing for the Removal of the Transfer Charging Roller .......................................................................................................................... 3-73.3.1.2 Removing the Transfer Charging Roller ........................................................................................................................................................ 3-7
3.3.2 Memory Tag Contact Unit ........................................................................................................................................................... 3-73.3.2.1 Preparing for the Removal of the Memory Tag Contact Unit ........................................................................................................................ 3-73.3.2.2 Removing the Memory Tag Contact Unit ...................................................................................................................................................... 3-7
3.4 PICKUP AND FEEDING SYSTEM ............................................................................................................................ 3-83.4.1 Pickup Unit .................................................................................................................................................................................. 3-8
3.4.1.1 Preparing for the Removal of the Pickup Assembly....................................................................................................................................... 3-83.4.1.2 Removing the Pickup Assembly..................................................................................................................................................................... 3-8
3.4.2 Cassette Pickup Roller ................................................................................................................................................................. 3-83.4.2.1 Preparing for the Removal of the Cassette Pickup Roller .............................................................................................................................. 3-83.4.2.2 Removing the Cassette Pickup Roller ............................................................................................................................................................ 3-8
3.4.3 Cassette Paper Sensor .................................................................................................................................................................. 3-93.4.3.1 Preparing for the Removal of the Cassette Paper Sensor ............................................................................................................................... 3-93.4.3.2 Removing the Cassette Paper Sensor.............................................................................................................................................................. 3-9
3.4.4 Cassette Pickup solenoid.............................................................................................................................................................. 3-93.4.4.1 Preparing for the Cassette Pickup Solenoid.................................................................................................................................................... 3-93.4.4.2 Removing the Cassette Pickup Solenoid ........................................................................................................................................................ 3-9
3.4.5 Manual Pickup Roller .................................................................................................................................................................. 3-93.4.5.1 Preparing for the Removal of the Manual Feeder Pickup Roller ................................................................................................................... 3-93.4.5.2 Removing the Manual Feeder Pickup Roller.................................................................................................................................................. 3-9
3.4.6 Manual Paper Sensor ................................................................................................................................................................. 3-103.4.6.1 Preparing for the Removal of the Manual Feeder Paper Sensor................................................................................................................... 3-103.4.6.2 Removing the Manual Feeder Paper Sensor................................................................................................................................................. 3-10
3.4.7 Multi-purpose Pickup Solenoid ................................................................................................................................................. 3-103.4.7.1 Preparing for the Removal of the Manual Feeder Pickup Solenoid ............................................................................................................. 3-103.4.7.2 Removing the Manual Feeder Pickup Solenoid ........................................................................................................................................... 3-10
3.4.8 Manual Separation Pad .............................................................................................................................................................. 3-103.4.8.1 Preparing for the Removal of the Manual Feeder Separation Pad ............................................................................................................... 3-103.4.8.2 Removing the Manual Feeder Separation Pad.............................................................................................................................................. 3-10
3.4.9 Registration Shutter Unit ........................................................................................................................................................... 3-103.4.9.1 Preparing for the Removal of the Registration Shutter Assembly................................................................................................................ 3-103.4.9.2 Removing the Registration Shutter Assembly.............................................................................................................................................. 3-10
3.4.10 Main Motor .............................................................................................................................................................................. 3-113.4.10.1 Preparing for the Removal of the Main Motor ........................................................................................................................................... 3-113.4.10.2 Removing the Main Motor ......................................................................................................................................................................... 3-11
3.5 FIXING SYSTEM....................................................................................................................................................... 3-113.5.1 Fixing Unit ................................................................................................................................................................................. 3-11
3.5.1.1 Preparing for the Removal of the Fixing Unit .............................................................................................................................................. 3-113.5.1.2 Removing the Fixing Unit ............................................................................................................................................................................ 3-11
3.5.2 Fixing Film Unit ........................................................................................................................................................................ 3-12
Contents
3.5.2.1 Preparing for the Removal of the Fixing Film Unit ......................................................................................................................................3-123.5.2.2 Removing the Fixing Film Unit ....................................................................................................................................................................3-12
3.5.3 Fixing Pressure Roller................................................................................................................................................................ 3-123.5.3.1 Preparing for the Removal of the Fixing Pressure Roller .............................................................................................................................3-123.5.3.2 Removing the Fixing Pressure Roller ...........................................................................................................................................................3-12
3.5.4 Delivery Sensor.......................................................................................................................................................................... 3-123.5.4.1 Preparing for the Removal of the Delivery Sensor .......................................................................................................................................3-123.5.4.2 Remove the Delivery Sensor.........................................................................................................................................................................3-12
3.5.5 Fixing Drive Motor .................................................................................................................................................................... 3-133.5.5.1 Preparing for the Removal of the Fixing Motor............................................................................................................................................3-133.5.5.2 Removing the Fixing Motor..........................................................................................................................................................................3-13
Chapter 3
3-1
3.1 EXTERNAL AND CONTROLS SYSTEM
3.1.1 Rear Cover
3.1.1.1 Preparing for the Removal of the Rear Cover0011-4876
1) Open the face-up delivery cover.
3.1.1.2 Removing the Rear Cover0011-0504
1) Remove the rear cover [1].- 2 screws [2]- 2 claws [3]
F-3-1
3.1.2 Right Cover
3.1.2.1 Removing the Right Cover0011-0507
1) Slide the right cover [1] in the direction of the arrow to detach.- 1 screw [2]
F-3-2
3.1.3 Upper Right Cover
3.1.3.1 Preparing for the Removal of the Upper Right Cover
0011-4863
1) Remove the right cover. 2) Remove the rear cover. 3) Remove the rear right cover.
3.1.3.2 Removing the Upper Right Cover0011-0510
1) Slide the upper right cover [1] in the direction of the arrow to detach.- 1 screw [2]
F-3-3
3.1.4 Front Right Cover
3.1.4.1 Preparing for the Removal of the Front Right Cover
0011-4864
1) Open the cartridge cover.2) Remove the right cover.
3.1.4.2 Removing the Front Right Cover0011-0500
1) Free the harness [2] from the hook [1].2) Remove the front right cover [3].
- 2 screws [4]
F-3-4
3.1.5 Rear Right Cover
3.1.5.1 Preparing for the Removal of the Rear Right Cover
0011-4865
1) Remove the rear cover.
3.1.5.2 Removing the Rear Right Cover0011-0505
1) Rotate the rear right cover [1] in the direction of the arrow to detach.
F-3-5
3.1.6 Lower Right Cover
3.1.6.1 Preparing for the Removal of the Lower Right Cover
0011-4866
1) Remove the right cover. 2) Remove the front right cover. 3) Remove the video controller assembly.
3.1.6.2 Removing the Lower Right Cover0011-0502
1) Slide the lower right cover [1] in the direction of the arrow to detach.- 2 screws [2]
F-3-6
Chapter 3
3-2
Be sure that the switch is kept in OFF position during disassembly work.During assembly work, it may be a good idea to keep the switch in ON po-sition to facilitate the work.At the end of assembly, be sure to shift the switch back to OFF position untilyou are ready to check the operation of the machine.
3.1.7 Left Cover
3.1.7.1 Preparing for the Removal of the Left Cover0011-4867
1) Open the cartridge cover.2) Remove the rear cover.
3.1.7.2 Removing the Left Cover0011-0499
1) Remove the left cover [1].- 2 screws [2]- 3 claws [3]
F-3-7
3.1.8 Upper Cover
3.1.8.1 Preparing for the Removal of the Upper Cover0011-4869
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the rear cover. 4) Remove the left cover. 5) Remove the rear right cover. 6) Remove the upper right cover.
3.1.8.2 Removing the Upper Cover0011-4646
1) Slide the upper cover [1] in the direction of the arrow to detach.- 4 screws [2]
F-3-8
3.1.9 Manual Feed Tray
3.1.9.1 Preparing for the Removal of the Manual Feeder Tray
0011-4870
1) Open the cartridge cover.2) Remove the rear cover. 3) Remove the left cover. 4) Remove the manual feeder cover assembly.
3.1.9.2 Removing the Manual Feeder Tray0011-4629
1) Remove the manual feeder tray assembly [1].- 2 springs [1]
F-3-9
3.1.10 Manual Feed Cover
3.1.10.1 Preparing for the Removal of the Manual Feeder Cover Assembly
0011-4871
1) Open the cartridge cover.2) Remove the rear cover. 3) Remove the left cover.
3.1.10.2 Removing the Manual Feeder Cover Assembly0011-4632
1) Slide the manual feeder cover assembly [1] in the direction of the arrowto detach.- 2 hinges [2]
F-3-10
3.1.11 Cartridge Cover
3.1.11.1 Preparing for the Removal of the Cartridge Cover Assembly
0011-4874
1) Open the cartridge cover.2) Remove the rear cover. 3) Remove the left cover. 4) Remove the manual feeder cover assembly. 5) Remove the Remove the manual feeder tray assembly.
3.1.11.2 Removing the Cartridge Cover Assembly0011-4875
1) Remove the spring [1].2) Remove the arm guide [2].
- 1 screw [3]3) Slide the cartridge cover assembly [4] in the direction of the arrow to
detach.- hinge [5]- door arm [6]
F-3-11
Chapter 3
3-3
3.1.12 Drive Unit
3.1.12.1 Preparing for the Removal of the Drive Unit0011-4925
1) Open the cartridge cover. 2) Remove the right cover. 3) Remove the front right cover. 4) Remove the rear cover. 5) Remove the left cover. 6) Remove the rear right cover. 7) Remove the upper right cover. 8) Rmove the upper cover. 8) Remove the control panel. 9) Remove the video controller assembly. 10) Remove the lower right cover. 11) Remove the engine controller assembly. 12) Remove the manual feeder pickup solenoid. 13) Remove the scanner fan.
3.1.12.2 Removing the Drive Unit0011-4926
1) Remove the drive unit [1].- 4 screws [2]
F-3-12
When mounting the drive unit, take care not to damage the flat cable.
3.1.13 Engine Controller Unit
3.1.13.1 Preparing for the Removal of the Engine Controller Assembly
0011-5317
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover. 4) Remove the rear cover. 5) Remove the left cover. 6) Remove the rear right cover. 7) Remove the upper right cover. 8) Remove the control panel. 8) Remove the control panel. 9) Remove the video controller assembly. 10) Remove the lower right cover.
3.1.13.2 Removing the Engine Controller Assembly0011-5318
1) Remove the cooling duct [1].- 2 claws [2]
F-3-132) Disconnect the 8 connectors [1], and remove the flat cable [2].
F-3-143) Disconnect the connector [1], and remove the 5 screws [2].
F-3-154) Disconnect the 3 connectors [1], and remove the 2 screws [2].
F-3-165) Remove the engine controller [1].
- 3 connectors [2]- 1 flat cable [3]- 1 switch link [4]
F-3-17
When mounting the engine controller assembly, be sure to fit the switch link[1] to the link holder [2].
3.1.14 Operation Panel Unit
3.1.14.1 Preparing for the Removal of the Control Panel Assembly
0011-4872
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover.
3.1.14.2 Removing the Control Panel Assembly0011-0503
1) Remove the control panel assembly [1].- 3 screws [2]
Chapter 3
3-4
- 1 connector [3]
F-3-18
3.1.15 Engine controller board
3.1.15.1 Preparing for the Removal of the Engine Controller PCB
0011-4921
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover. 4) Remove the rear cover. 5) Remove the left cover. 6) Remove the rear right cover. 7) Remove the upper right cover. 8) Remove the upper cover. 8) Remove the control panel. 9) Remove the video controller assembly. 10) Remove the lower right cover. 11) Remove the engine controller assembly.
3.1.15.2 Removing the Engine Controller PCB0011-4923
1) Slide the flat cable [1] and the flat cable guide [2] in the direction of thearrow to detach- 1 claw [3]
F-3-192) Remove the engine controller PCB [1].
- 9 screws [2]- 1 claw [3]
F-3-20
3.1.16 Video Controller Board
3.1.16.1 Preparing for the Removal of the Video Controller Board
0011-7613
1) Remove the right cover.
3.1.16.2 Removing the Video Controller Board0011-7616
1) Remove the video controller assembly [1].- 3 connectors and flat cables [2]- 2 screws [3]
F-3-212) Remove the NIC cover [1].
- 2 screws [2]
F-3-223) Remove the plate [1].
- 9 screws [2]
F-3-234) Remove the video controller board [1].
- 8 screws [2]
F-3-24
3.1.17 High-voltage board
3.1.17.1 Preparing for the Removal of the High-Voltage Power Supply PCB
0011-4929
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover. 4) Remove the rear cover. 5) Remove the left cover. 6) Remove the rear right cover. 7) Remove the upper right cover. 8) Remove the upper cover. 9) Remove the control panel.
Chapter 3
3-5
10) Remove the video controller assembly. 11) Remove the lower right cover. 12) Remove the engine controller assembly. 13) Remove the manual feeder pickup solenoid. 14) Remove the scanner fan. 15) Remove the drive unit.
3.1.17.2 Removing the High-Voltage Power Supply Unit0011-4973
1) Remove the duplexing transport assembly [1].- Press the jam removal button [2] in the direction of the arrow.- Open the bearing assembly [3].
F-3-252) Remove the reference guide assembly [1].
- 2 screws [2]
F-3-263) Remove the 2 screws [1].
F-3-274) Remove the base plate [1].
- 1 screw [2]
F-3-285) Remove the guide [1].
- 2 screws [2]
F-3-296) Remove the 2 screws [1], and disconnect the connector [2].
F-3-307) Remove the plate [1].
- 2 screws [2]8) Remove the high-voltage power supply assembly [3].
- 3 screws [4]
F-3-31
The spring [2] (attached from below the main frame [1]) is likely to come offwhen the high-voltage power supply is being removed. Take care not to losethe spring.
F-3-32
9) Remove the high-voltage power supply PCB [1].- 3 screws [2]
Chapter 3
3-6
F-3-33
3.1.18 Top sensor
3.1.18.1 Preparing for the Removal of the Top of Page Sensor
0011-5081
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover. 4) Remove the rear cover. 5) Remove the left cover. 6) Remove the rear right cover. 7) Remove the upper right cover. 8) Remove the upper cover. 9) Remove the control panel. 10) Remove the video controller assembly. 11) Remove the lower right cover. 12) Remove the engine controller assembly. 13) Remove the manual feeder pickup solenoid. 14) Remove the scanner fan. 15) Remove the drive unit. 16) Remove the high-voltage power supply PCB.
3.1.18.2 Removing the Top of Page Sensor0011-5082
1) Remove the guide [1].- 2 screws [2]
F-3-342) Remove the Top of Page Sensor [1].
- 1 screw [2]
F-3-35
3.1.19 Face-up Cover Sensor
3.1.19.1 Preparing for the Removal of the Face-Up Delivery Cover Sensor
0011-5055
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the rear cover. 4) Remove the left cover. 5) Remove the rear right cover. 6) Remove the upper right cover. 7) Remove the upper cover.
3.1.19.2 Removing the Face-Up Delivery Cover Sensor0011-5062
1) Remove the face-up delivery cover sensor [1].- 1 connector [2]- 2 claws [3]
F-3-36
3.1.20 Door Switch
3.1.20.1 Preparing for the Removal of the Door Switch0011-5063
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover. 4) Remove the control panel assembly.
3.1.20.2 Removing the Door Switch0011-5064
1) Remove the door switch [1].- 2 connectors [2]- 2 claws [3]
F-3-37
Be sure that the connector pins fitted to the door switch are correctly ar-ranged.
3.1.21 Scanner Fan
3.1.21.1 Preparing for the Removal of the Scanner Fan0011-5092
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover.
3.1.21.2 Removing the Scanner Fan0011-5093
1) Remove the duct [1].- 2 claws
F-3-382) Disconnect the connector [1], and free the harness [3] from the harness
guide [2].3) Remove the scanner fan together with the fan holder [4].
- 2 screws [5]4) Remove the scanner fan [6].
- 2 screws [7]
Chapter 3
3-7
F-3-39
3.1.22 Fixing Fan
3.1.22.1 Preparing for the Removal of the Fixing Fan0011-5094
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the rear cover. 4) Remove the left cover. 5) Remove the rear right cover. 6) Remove the upper right cover. 7) Remove the upper cover.
3.1.22.2 Removing the Fixing Fan0011-5095
1) Disconnect the connector [1], and free the harness [3] from the harnessguide [2].
F-3-402) Remove the fixing fan [1].
- 2 claws [2]
F-3-41
3.2 LASER EXPOSURE SYSTEM
3.2.1 Laser Scanner Unit
3.2.1.1 Preparing for the Removal of the Laser Scanner Unit
0011-4879
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the rear cover. 4) Remove the left cover. 5) Remove the rear right cover. 6) Remove the upper right cover. 7) Remove the upper cover.
3.2.1.2 Removing the Laser Scanner Unit0011-4880
1) Remove the scanner duct [1].- 1 claw [2]
2) Disconnect the connector [3], and remove the flat cable [4].3) Remove the laser/scanner unit [5].
- 4 screws [6]
F-3-42
3.3 IMAGE FORMATION SYSTEM
3.3.1 Transfer Charging Roller
3.3.1.1 Preparing for the Removal of the Transfer Charging Roller
0011-5030
1) Open the cartridge cover.
3.3.1.2 Removing the Transfer Charging Roller0011-5031
1) Remove the transfer charging roller [1].- 4 claws [2]- 1 bearing [3]
F-3-43
3.3.2 Memory Tag Contact Unit
3.3.2.1 Preparing for the Removal of the Memory Tag Contact Unit
0011-5042
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover. 4) Remove the rear cover. 5) Remove the left cover. 6) Remove the rear right cover. 7) Remove the upper right cover. 8) Remove the upper covet. 9) Remove the control panel.
3.3.2.2 Removing the Memory Tag Contact Unit0011-5043
1) Remove the harness [1].- 1 harness guide [2]- 1 connector [3]
F-3-442) Remove the memory tag unit [1].
- 1 screw [2]
[1]
[2]
[2] [2]
[2]
[3]
Chapter 3
3-8
F-3-453) Remove the memory tag contact unit [1].
- 2 claws [2]
F-3-46
3.4 PICKUP AND FEEDING SYSTEM
3.4.1 Pickup Unit
3.4.1.1 Preparing for the Removal of the Pickup Assembly
0011-4927
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover. 4) Remove the rear cover. 5) Remove the left cover. 6) Remove the rear right cover. 7) Remove the upper right cover. 8) Remove the control panel. 9) Remove the video controller assembly. 10) Remove the lower right cover. 11) Remove the engine controller assembly. 12) Remove the manual feeder pickup solenoid. 13) Remove the scanner fan. 14) Remove the drive unit.
3.4.1.2 Removing the Pickup Assembly0011-4928
1) Remove the screw [1].2) Free the harness [3] from the harness guide [2].3) Remove the cassette pickup solenoid [4] and the plate [5].
- 1 screw [6]4) Remove the gear [7].
- 1 claw [8]
F-3-475) Remove the base plate [1].
- 1 screw [2]
F-3-486) Remove the guide [1].
- 1 screw [2]
F-3-49
A harness is routed on the guide. Be sure to route it correctly during assem-bly work.
7) Remove the guide [1].- 1 screw [2]
F-3-508) Remove the roller stay assembly [1].
- 2 screws [2]9) Remove the pickup unit [3].
- Push the jam removal button [4] in the direction of the arrow.- 4 screws [5]
F-3-51
3.4.2 Cassette Pickup Roller
3.4.2.1 Preparing for the Removal of the Cassette Pickup Roller
0011-5039
1) Remove the cassette.
3.4.2.2 Removing the Cassette Pickup Roller0011-5040
1) Rotate the bearing [1] in the direction of the arrow to detach.- 1 claw [2]
Chapter 3
3-9
F-3-522) Remove the claw [1], and rotate the bearing [2] in the direction of the
arrow to detach.3) Remove the 2 auxiliary rollers [3], and remove the cassette pickup roller
[4].
F-3-53
3.4.3 Cassette Paper Sensor
3.4.3.1 Preparing for the Removal of the Cassette Paper Sensor
0011-5078
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover. 4) Remove the rear cover. 5) Remove the left cover. 6) Remove the rear right cover. 7) Remove the upper right cover. 8) Remove the control panel. 9) Remove the video controller assembly. 10) Remove the lower right cover. 11) Remove the engine controller assembly. 12) Remove the manual feeder pickup solenoid. 13) Remove the scanner fan. 14) Remove the drive unit. 15) Remove the pickup assembly.
3.4.3.2 Removing the Cassette Paper Sensor0011-5079
1) Remove the transport guide [1].- 2 screws [2]
F-3-542) Remove the claw [1].3) Slide the drive shaft [2] and the bushing [3] in the direction of the arrow.4) Remove the sensor arm [4].
F-3-555) Remove the cassette paper sensor [1].
- 1 connector [2]- 2 claws [3]
F-3-56
3.4.4 Cassette Pickup solenoid
3.4.4.1 Preparing for the Cassette Pickup Solenoid0011-5090
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover. 4) Remove the rear cover. 5) Remove the left cover. 6) Remove the rear right cover. 7) Remove the upper right cover. 8) Remove the control panel. 9) Remove the video controller assembly. 10) Remove the lower right cover. 11) Remove the engine controller assembly. 12) Remove the manual feeder pickup solenoid. 13) Remove the scanner fan. 14) Remove the drive unit.
3.4.4.2 Removing the Cassette Pickup Solenoid0011-5091
1) Free the harness [2] from the harness guide [1].2) Remove the cassette pickup solenoid [3].
- 1 screw [4]
F-3-57
3.4.5 Manual Pickup Roller
3.4.5.1 Preparing for the Removal of the Manual Feeder Pickup Roller
0011-5032
1) Open the cartridge cover.
3.4.5.2 Removing the Manual Feeder Pickup Roller0011-5033
1) Remove the manual feeder pickup roller [1].- 2 claws [2]
Chapter 3
3-10
F-3-58
3.4.6 Manual Paper Sensor
3.4.6.1 Preparing for the Removal of the Manual Feeder Paper Sensor
0011-5065
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover. 4) Remove the rear cover. 5) Remove the left cover. 6) Remove the rear right cover. 7) Remove the upper right cover. 8) Remove the control panel. 9) Remove the video controller assembly. 10) Remove the lower right cover. 11) Remove the engine controller assembly. 12) Remove the manual feeder pickup solenoid. 13) Remove the scanner fan. 14) Remove the drive unit. 15) Remove the pickup assembly.
3.4.6.2 Removing the Manual Feeder Paper Sensor0011-5066
1) Remove the manual feeder paper sensor [1].- 1 screw [2]
F-3-59
3.4.7 Multi-purpose Pickup Solenoid
3.4.7.1 Preparing for the Removal of the Manual Feeder Pickup Solenoid
0011-5088
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover. 4) Remove the rear cover. 5) Remove the left cover. 6) Remove the rear right cover. 7) Remove the upper right cover. 8) Remove the control panel. 9) Remove the video controller assembly. 10) Remove the lower right cover. 11) Remove the engine controller assembly.
3.4.7.2 Removing the Manual Feeder Pickup Solenoid0011-5089
1) Free the harness [2] from the harness guide [1].2) Remove the arm duct [3].
- 2 screws [4]
F-3-603) Remove the manual feeder pickup solenoid [1].
- 1 screw [2]
F-3-61
3.4.8 Manual Separation Pad
3.4.8.1 Preparing for the Removal of the Manual Feeder Separation Pad
0011-5034
1) Open the cartridge cover.
3.4.8.2 Removing the Manual Feeder Separation Pad0011-5035
1) Remove the manual feeder separation pad [1].- 2 claws [2]
F-3-62
3.4.9 Registration Shutter Unit
3.4.9.1 Preparing for the Removal of the Registration Shutter Assembly
0011-4970
1) Open the cartridge cover.2) Remove the left cover assembly.
3.4.9.2 Removing the Registration Shutter Assembly0011-4971
1) Remove the gear [1].- 1 claw [2]
F-3-63
[1]
[2]
Chapter 3
3-11
2) Remove the registration cover [1].- 2 screws [2]
3) Remove the registration shutter assembly [3].- 4 screw [4]
F-3-644) Remove the registration shutter assembly [1].
- 1 claw [2]- 1 gear [3]
F-3-65
Take care not to soil the registration shutter assembly with grease when re-moving the gear.
3.4.10 Main Motor
3.4.10.1 Preparing for the Removal of the Main Motor0011-5086
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover. 4) Remove the rear cover. 5) Remove the left cover. 6) Remove the rear right cover. 7) Remove the upper right cover. 8) Remove the control panel. 9) Remove the video controller assembly. 10) Remove the lower right cover. 11) Remove the engine controller assembly. 12) Remove the manual feeder pickup solenoid. 13) Remove the scanner fan. 14) Remove the drive unit. 15) Remove the pickup assembly. 16) Remove the fixing unit.
3.4.10.2 Removing the Main Motor0011-5087
1) Remove the harness [1].- 2 harness guides [2]
F-3-662) Remove the spring [1] from the rib [2] and the guide [3].3) Remove the feeder guide assembly [4].
- 2 screws [5]
F-3-674) Remove the main motor cover [1].
- 2 screws [2]
F-3-685) Remove the main motor [1].
- 3 screws [2]
F-3-69
3.5 FIXING SYSTEM
3.5.1 Fixing Unit
3.5.1.1 Preparing for the Removal of the Fixing Unit0011-4647
1) Remove the rear cover. 2) Remove the rear right cover.
3.5.1.2 Removing the Fixing Unit0011-4877
1) Remove the inside cover [1].- 1 claw [2]
2) Remove the duplexing feed guide [3].- 2 claws [4]- 1 connector [5]
F-3-703) Free the harness [2] from the harness guide [1].
- 2 connectors [3]4) Remove the fixing assembly [4].
- 4 screws [5]
Chapter 3
3-12
F-3-71
3.5.2 Fixing Film Unit
3.5.2.1 Preparing for the Removal of the Fixing Film Unit0011-4990
1) Remove the rear cover. 2) Remove the rear right cover. 3) Remove the fixing unit.
3.5.2.2 Removing the Fixing Film Unit0011-4992
1) Slide the inlet upper guide [1] in the direction of the arrow to detach.- 1 screw [2]
2) Remove the plate [3].- 2 screws [4]- 2 claws [5]
F-3-72
Take care. The plate can jump up by the work of the spring during the fore-going work.
3) Slide the reversal guide [1] in the direction of the arrow to detach.- 1 screw [2]
F-3-734) Free the harness [2] from the harness guide [1], and remove the fixing film
unit [3].
F-3-74
A thermal switch is mounted inside the fixing film unit. Do not disassemblethe unit. Otherwise, the switch may fail to operate normally.
3.5.3 Fixing Pressure Roller
3.5.3.1 Preparing for the Removal of the Fixing Pressure Roller
0011-5008
1) Remove the rear cover. 2) Remove the rear right cover. 3) Remove the fixing unit. 4) Remove the fixing film unit.
3.5.3.2 Removing the Fixing Pressure Roller0011-5010
1) Slide the inlet lower guide [1] in the direction of the arrow to detach.- 1 screw [1]
F-3-752) Remove the gear [1].
- 1 claw [2]3) Remove the fixing pressure roller [3].
- 1 rib [4]4) Turn the bushing [5] in the direction of the arrow to detach.
F-3-76
3.5.4 Delivery Sensor
3.5.4.1 Preparing for the Removal of the Delivery Sensor0011-5053
1) Remove the rear cover. 2) Remove the rear right cover. 3) Remove the fixing unit.
3.5.4.2 Remove the Delivery Sensor0011-5054
1) Slide the reversal guide [1] in the direction of the arrow to detach.- 1 screw [2]
F-3-772) Slide the separation lower guide assembly [1] in the direction of the arrow
to detach.- 1 screw [2]
Chapter 3
3-13
F-3-783) Remove the delivery sensor [1].
- 1 connector [2]- 2 claws [3]
F-3-79
3.5.5 Fixing Drive Motor
3.5.5.1 Preparing for the Removal of the Fixing Motor0011-5083
1) Open the cartridge cover.2) Remove the right cover. 3) Remove the front right cover. 4) Remove the rear cover. 5) Remove the left cover. 6) Remove the rear right cover. 7) Remove the upper right cover. 8) Remove the control panel. 9) Remove the video controller assembly. 10) Remove the lower right cover. 11) Remove the engine controller assembly.
3.5.5.2 Removing the Fixing Motor0011-5084
1) Remove the fixing motor [1].- 2 screws [2]- 1 connector [3]
F-3-80
Chapter 4 MAINTENANCE AND INSPECTION
Contents
Contents
4.1 Periodically Replaced Parts ...........................................................................................................................................4-14.1.1 Periodically Replaced Parts ......................................................................................................................................................... 4-1
4.2 Consumables ..................................................................................................................................................................4-14.2.1 Consumable Parts......................................................................................................................................................................... 4-1
4.3 Periodical Service ..........................................................................................................................................................4-14.3.1 Periodic Service ........................................................................................................................................................................... 4-1
4.4 Cleaning .........................................................................................................................................................................4-14.4.1 Cleaning ....................................................................................................................................................................................... 4-1
Chapter 4
4-1
4.1 Periodically Replaced Parts
4.1.1 Periodically Replaced Parts0011-0173
The machine does not have parts that must be replaced on a periodical basis.
4.2 Consumables
4.2.1 Consumable Parts0011-0174
No parts require consumables in this printer.
4.3 Periodical Service
4.3.1 Periodic Service0011-0175
The printer has no parts that require periodic servicing.
4.4 Cleaning
4.4.1 Cleaning0011-0177
F-4-1[1] Fixing Inlet GuideClean it using lint-fee paper.
[2] Transfer Charging RollerIf touched, it may require cleaning. Take good care not to touch it during cleaning, and make sure not to leave solvents or oils.Use lint-free paper for cleaning. Do not use water.
[3] Registration Roller
[1] [2] [3] [4] [5]
[6][7]
Chapter 4
4-2
Clean it using lint-free paper.
[4] Manual Feeder Pickup RollerClean it using lint-free paper.
[5] Manual Feeder Separation PadClean its rubber portion using lint-free paper.
[6] Cassette Separation PadClean its rubber portion using lint-free paper.
[7] Cassette Pickup RollerClean it using lint-free paper.
- Do not touch the sponge portion of the transfer charging roller to avoid soiling of the back of prints and white spots. Never use solvents.- If dirt cannot be removed or the roller is deformed, replace the roller.
Chapter 5 TROUBLESHOOTING
Contents
Contents
5.1 MEASUREMENT AND ADJUSTMENT ....................................................................................................................5-15.1.1 Test Print ...................................................................................................................................................................................... 5-1
5.1.1.1 Test Print .........................................................................................................................................................................................................5-15.1.2 Mechanical Adjustment ............................................................................................................................................................... 5-1
5.1.2.1 Checking the Pressure of the Pressure Roller (nip) ........................................................................................................................................5-15.2 SERVICE TOOLS .........................................................................................................................................................5-2
5.2.1 Solvents and Oils ......................................................................................................................................................................... 5-25.2.2 Special Tools................................................................................................................................................................................ 5-2
5.3 ERROR CODE TABLE.................................................................................................................................................5-25.3.1 Error Code.................................................................................................................................................................................... 5-25.3.2 A4-XX_ERROR .......................................................................................................................................................................... 5-35.3.3 A5-XX_ERROR .......................................................................................................................................................................... 5-35.3.4 A7-XX_ERROR .......................................................................................................................................................................... 5-45.3.5 D7-XX_ERROR .......................................................................................................................................................................... 5-4
5.4 Version Up .....................................................................................................................................................................5-45.4.1 Overview of Upgrading Work ..................................................................................................................................................... 5-45.4.2 Construction of Firmware ............................................................................................................................................................ 5-45.4.3 Outline of the Service Support Tool ........................................................................................................................................... 5-45.4.4 Registering the Firmware............................................................................................................................................................ 5-55.4.5 Making Connections .................................................................................................................................................................... 5-75.4.6 The down load procedure of the system ...................................................................................................................................... 5-9
5.5 Sevice Mode.................................................................................................................................................................5-115.5.1 PCL ............................................................................................................................................................................................ 5-11
5.5.1.1 Overview .......................................................................................................................................................................................................5-115.5.1.2 Service Mode ................................................................................................................................................................................................5-12
Chapter 5
5-1
5.1 MEASUREMENT AND ADJUSTMENT
5.1.1 Test Print
5.1.1.1 Test Print0011-5141
When this test printing is made, the test print pattern (horizontal lines) isprinted as shown below.When the printer is turned ON and it enters the standby status, press the testprint switch located on the right side of the printer once and one page of en-gine test pattern is printed. The test pattern can be printed continuously if theswitch is held down.1) Slide the right cover [1] in the direction of the arrow to detach.
- 1 screw [2]
F-5-12) Pull the lever [1] and press the test print switch.
F-5-2
F-5-3
5.1.2 Mechanical Adjustment
5.1.2.1 Checking the Pressure of the Pressure Roller (nip)
0011-5147
The machine does not permit adjustment of the nip of its fixing assembly. Anincorrect nip, nevertheless, can lead to fixing faults, making it important tocheck it as follows:1) Before visiting the user, prepare an A4 solid black print using an EP
cartridge.
2) At the user's, place the solid black print in the machine's manual feedertray with its printed side facing down.
3) Open the face-up cover to select face-up delivery.4) Press the test print switch.5) When the lead edge of print paper starts to appear at the face-up delivery
slot, turn off the power switch.About 30 sec after pressing the power switch, remove the print paper from
the machine.6) Measure the width of the area of the print paper shiny with toner, and
check to make sure that it is as indicated:middle (a): 6.9 to 8.7 mmleft/right (b, c): 6.9 to 8.7 mm
F-5-4
Feed-out direction
c
a
b
Center of A4-sized paper
Chapter 5
5-2
5.2 SERVICE TOOLS
5.2.1 Solvents and Oils0011-5152
T-5-1
Use a moist cloth (well wrung) to clean the external covers.
5.2.2 Special Tools0011-5153
The machine does not require special tools in addition to the standard tools set.
5.3 ERROR CODE TABLE
5.3.1 Error Code0011-5642
T-5-2
No. Name Use Components Remarks1 Alcohol Cleaning:plastic
(note),rubber,metal,oil,and toner stains
Alcohol -Flammable:keep away from flame-Purchase locally
2 Lubricant Apply to gears, between shaft and bushing
Special oil Special solid lubricating material Lithium soap
-Tool No. HY9-0007
3 Lubricant Apply between pressure roller shaft and grounding plate
High performance grease Carbon black Graphite
-Electricity grease-Tool No. CK-8007
Code Description Remedial actionE000 Fixing fault0000 Condition
After the fixing heater has gone on, the reading is not -5 deg C of the target temperature within 75 sec.CauseThe fixing film unit is faulty. The engine controller PCB is faulty.
- Replace the fixing film unit.- Replace the engine controller PCB.
0001 ConditionAfter the fixing heater has gone on, the reading of the main thermistor is not 50 deg C within about 1.5 sec.CauseThe fixing film unit is faulty. The engine controller PCB is faulty.
- Replace the fixing film unit.- Replace the engine controller PCB.
E001 Fixing error high temperature0000 Condition
A temperature of the main thermistor is detected 240 degrees Celsius for one second.CauseThe main thermistor is faulty. The engine controller PCB is faulty.
- Replace the fixing film unit.- Replace the engine controller PCB.
0001 ConditionA temperature of the sub-thermistor is detected 320 degrees Celsius or higher for approximately 2.6 seconds.CauseThe sub/main thermistor is faulty. The engine controller PCB is faulty.
- Replace the fixing film unit.- Replace the engine controller PCB.
E003 Fixing low temperature0000 Condition
The temperature of the main thermistor shows 20 deg C or below for 300 ms continuously after the temperature of the main thermistor exceeds 50 deg C at least once.CauseThe main thermistor is faulty. The engine controller PCB is faulty. The connector is in poor contact. The harness is faulty.
- Replace the fixing film unit.- Replace the engine controller PCB.
0001 ConditionThe temperature of the sub thermistor shows 35 deg C or below for 1 second continuously after the temperature of the main thermistor exceeds 50 deg C at least once.CauseThe sub-thermistor is faulty. The engine controller PCB is faulty. The connector is in poor contact. The harness is faulty.
- Replace the fixing film unit.- Replace the engine controller PCB.
E004 Fixing assembly drive assembly circuit error
Chapter 5
5-3
5.3.2 A4-XX_ERROR0011-5592
T-5-3
5.3.3 A5-XX_ERROR0011-5595
T-5-4
0000 ConditionZero cross signal cannot be detected for specified time or longer.CauseFixing control circuit assembly is faulty.
- Replace the engine controller PCB.
E012 Main motor error0000 Condition
A motor ready state does not start 3 sec or more after the motor has been started.CauseThe drum motor is faulty. The engine controller PCB is faulty.
- Replace the drum motor.- Replace the engine controller PCB.
0001 ConditionA motor ready state remains for 3 sec or more even though the motor has not been driven.CauseThe drum motor is faulty. The engine controller PCB is faulty.
- Replace the drum motor.- Replace the engine controller PCB.
E100 BD errorCauseThe laser scanner unit is faulty. The engine controller PCB is faulty.
0000 BD errorDuring constant speed rotation, the cycle of the BD signal deviates for 1 sec or more from a specific cycle.
- Replace the laser scanner unit.- Replace the engine controller PCB.
E110 Polygon motor errorCauseThe polygon motor is faulty.
0000 After the /BDI signal has been detected, it is not detected 14 sec later.
- Replace the scanner motor.
0001 After the scanner motor has reached as specific revolution, the /BDI signal is not detected within 1.5 sec.
- Replace the scanner motor.
E602 HDD error0002 Downloading of the controller firmware ends in
failure.- Download the controller firmware again.- Replace the video controller board by new one.
E604 Memory shortage0000 The memory is inadequate. - Install and uninstall the memory
- Replace the memory by correct one.- Turn the power off and on.- Replace the video controller board by new one.
E733 Printer-related communication error0000 At power-on, an error has occurred in the
communication between engine controller and video controller (caused by the engine controller).
- Turn off and then back on the power.- Replace the engine controller board.
0001 At a time other than power-on, an error has occurred in the communication between engine controller and video controller (caused by the engine controller).
0004 Undefined command errorE744 Illegal ID code during controller firmware download
1000 It is detected that the USB product ID sent at downloading of the controller firmware and the product ID of bootrom written in ROM do not match.
- Replace the scanner fan.- Replace the video controller PCB.
E805 Fan error0001 Scanner fan error
CauseThe scanner fan is faulty. The engine controller PCB is faulty.
- Replace the scanner fan.- Replace the engine controller PCB.
0000 Fixing fan errorCauseThe fixing fan is faulty. The engine controller PCB is faulty.
- Replace the fixing fan.- Replace the engine controller PCB.
Number field Description Remedial actionA4-00 to 06 There is a fault in the software program of the
video controller.- Turn off and then back on the power.- Replace the video controller board.
Number field Description Remedial actionA5-00 to 07 A fault has occurred in image
processing within the controller.1. Turn off and then back on the power.2. If remedy 1 above fails, increase the memory.3. If remedy 2 above fails, replace the controller board.
Code Description Remedial action
Chapter 5
5-4
5.3.4 A7-XX_ERROR0011-5596
T-5-5
5.3.5 D7-XX_ERROR0011-5598
T-5-6
5.4 Version Up
5.4.1 Overview of Upgrading Work0011-9234
The machine's system software may be upgraded using a PC to which the Service Support Tool (SST) has been installed.
5.4.2 Construction of Firmware0011-9235
The following shows the composition of the machine's firmware:T-5-7
F-5-5
5.4.3 Outline of the Service Support Tool0011-9236
The service support tool (SST, hereafter) provides the following functions:
F-5-6
MENO:The machine does not support uploading/downloading of the SST's backup mechanism.
Number field Description Remedial actionA7-00 There is an error in the software
program of the video controller.1. Turn off and then back on the power.2. If remedy 1 above fails, replace the controller board.
Number field Description Remedial actionD7-00,01 A fault has occurred the firmware of
the PCL translator.1. Turn off and then on the power.2. If remedy 2 above fails, replace the controller board.
Firmware Function Location Remarkscont Controls overall machine
operation.Video controller board Soldered to flash ROM
(IC16)
Flash ROM(System)
SST
Flash ROM
PC for Servicing LBP3460
FilmwareFilmware download
Chapter 5
5-5
To use the SST, put the machine in download mode:Shifting to Download Mode1. While holding down on the Online key (1) and the job cancel job key (2), turn on the power.2. Press the settings key (3) several times; when 'SERVICE MODE' is indicated, press the reset key (4) to start service mode.3. Press the setttings key (3) several times; when 'F/W UPDATE GR' is indicated, press the reset key (4).4. Press the setttings key (3) several times; when 'USB' is indicated, press the reset key (4).5. When 'OK?' is indicated, press the OK key (5) to start download mode.
F-5-7
F-5-8
5.4.4 Registering the Firmware0011-9237
Copy the firmware from the system CD to the SST.
[Making Preparations]Items to Prepare- PC to which SST v3.21 or later has been installed
OKUtility
Job
Settings
Reset
Feeder Selection
Cancel Job
Online
Ready Message Job
[3]
[5]
[2]
[1]
[4]
Main power-ON
Service ModeDownrod
SYSTEM program
SYSTEM
BOOT program
Download mode
Download controlprogram
Chapter 5
5-6
- system CD for the LBP3460
[Copying the Firmware]1) Start up the PC.2) Set the system CD in the PC.3) Start up the SST.4) Click [Register Firmware].
F-5-9
5) Select the drive in which you have set the system CD, and click [search].
F-5-10
6) See that a list has appeared indicating the software found on the system CD. Deselect (by removing the check mark) from those folders and system software filesyou do not need; then, click [REGISTER].
Service Support Tool DLM0 (Ver.3.21E)
CONTROL Model List
CONNECT
CANCEL
EXIT
START
Register Firmware
Delete Firmware
Delete Backup Data
System Management
MFP
USB
Target SelectionSe lec t the ta rge t . C l i ck a bu t ton to execute. Se lec t a mode l to connect
MFP
USB
c:
CONTROLRegisterd Firms Regist Firm
e:
Service Support Tool DLM0 (Ver.3.21E)
Registered f irmware Select a dr ive and folder.C l ick a bu t ton to execute.
CONNECT
CANCEL
SEARCH
EXIT
REGISTER
Register Firmware
Delete Firmware
Delete Backup Data
System Management
System Software e:
Chapter 5
5-7
F-5-11
7) When the result of copying the system software has appeared, click [OK].
F-5-12
5.4.5 Making Connections0011-9238
Connect the PC to the machine.
[Making Preparations]Items to Prepare- PC to which SSTv3.21 or higher and LBP3460 firmware have been installed- USB cable (USB1.1,USB2.0)
[Procedure]1) Start up the PC.2) Connect the machine and the PCB with a USB cable.
CONTROLRegisterd Firms Found Firm
LBP3460
XXxxv0103CONT
XXxxv0102
Registered f irmware The f i rmware l is ted below is found.Unchecked f i rmware is registered.
C l ick a bu t ton to execute.
CONNECT
CANCEL
EXIT
REGISTER
Register Firmware
Delete Firmware
Delete Backup Data
System Management
LBP3460CONT
Service Support Tool DLM0 (Ver.3.21E)
CONTROLRegisterd Firms Found Firm
LBP3460CONT
XXxxv0102 XXenv0103 >>> Regist
Registered f irmware Firmware registrat ion completed.
>>> Batch Registrat ion Resul ts
C l ick a bu t ton to execute.
CONNECT
CANCEL
EXIT
O K
Register Firmware
Delete Firmware
Delete Backup Data
System Management
Service Support Tool DLM0 (Ver.3.21E)
LBP3460CONT
XXxxv0102 XXenv0103
Chapter 5
5-8
F-5-13
4) Turn on the main power as follows to start download mode.1. While holding down on the Online key (1) and the job cancel job key (2), turn on the power.2. Press the settings key (3) several times; when 'SERVICE MODE' is indicated, press the reset key (4) to start service mode.3. Press the setttings key (3) several times; when 'F/W UPDATE GR' is indicated, press the reset key (4).4. Press the setttings key (3) several times; when 'USB' is indicated, press the reset key (4).5. When 'OK?' is indicated, press the OK key (5) to start download mode.
F-5-14
MEMO:The New Hardware Wizard appears on the PC screen. Click [cancel].
USB cable
OKUtility
Job
Settings
Reset
Feeder Selection
Cancel Job
Online
Ready Message Job
[3]
[5]
[2]
[1]
[4]
Chapter 5
5-9
F-5-15
5) Start up the SST.
5.4.6 The down load procedure of the system0011-9241
1) Select the model to connect. (LBP3460)
F-5-16
2) Select 'CONT' (LBP3460), and click [start].
Found New Hardware Wizard
Welcome to the Found NewHardware Wizard
This Wizard helps you indtall a device driver for ahardware device.
To continue, click Next.
CancelNext >< Back
Service Support Tool DLM0 (Ver.3.21E) Download
Register Firmware
Delete Firmware
System Management
Return to Main Menu
CANCEL
START
Delete Backup Data
CONNECT
Cl ick a bu t ton to execute. Select a model to connect
CONTROL Model List
MFP
USB
Target Selection
MFP
USB
c:
Select the target.
E320GJ
iRC2570LBP3460
iRC3100/iRC3100NiRC3170LBP5900
LBP3460
Chapter 5
5-10
F-5-17
3) Select the version to download, and click [start].
F-5-18
4) When the result of downloading is indicated, click [OK].
Service Support Tool DLM0 (Ver.3.21E) Download
Register Firmware
Delete Firmware
System Management
EXIT
CANCEL
Delete Backup Data
CONNECT
Click a button to execute.CONTROL Model List
START
USB
LBP3460CONT
Interface
Check the interface and click the<START> button.
LBP3460
XXxxv0102XXxxv0103
MFP
USB
Target Selection
MFP
USB
c:
Select the target.
Service Support Tool DLM0 (Ver.3.21E) Download
Return to Main Menu
Cancel
InformationSelectableFirmware
LBP3460CONT
Select the firmware to bedownload, rhen click the [Start]button.
Click the button of task to beexecuted.
Country/Region: AllLanguage: CommonVersion: 01.03
CONT
Selectable Firmware
Initial
Complete
Download
Connect via USB
XXxxv0102XXxxv0103
Control
Download Firmware
Start
Chapter 5
5-11
F-5-19
The end of work with the SST does not mean the end of work to be performed on the machine. Be sure not to turn off the machine until it indicates '00 ready to print'.It takes about 3 min from when [start] is clicked to when '00 ready to print' is indicated.If interrupted while writing the program to its memory, the machine may fail to start up.
5) Click [EXIT].
F-5-20
After DownloadingThe new version will not be effective unless the power has been turned off and then back on.
5.5 Sevice Mode
5.5.1 PCL
5.5.1.1 Overview0011-8128
Shifting to Service Mode
1. While holding down the online key (1) and the cancel job key (2), turn on the power.2. Press the setting key (3) so that 'service mode' is indicated.3. Press the execute key so that the group name appears. (Use the down arrow key to move to the next item.)
Return to Main Menu
Cancel
formation
O K
SelectableFirmware
LBP3460CONT
Downlaod complete
Country/Region: AllLanguage: CommonVersion: 01.03
CONT
Selectable Firmware
Initial
Complete
Download
Close USB Port
XXxxv0102XXxxv0103
Task using SST has ended.The machine will start writing processautomatically."Add New Hard ware Wizard" will startautomatically; click Cancel button to close it.Click [OK] button to return to Main Menu.
Caution
O K
Service Support Tool DLM8 (Ver.3.21E) Download
Service Support Tool DLM0 (Ver.3.21E) Download
Register Firmware
Delete Firmware
System Management
EXIT
CANCEL
START
Delete Backup Data
CONNECT
Cl ick a bu t ton to execute. Select a model to connect
CONTROL Model List
MFP
USB
Target Selection
MFP
USB
c:
Select the target.
LBP3460
LBP3460CONT
Chapter 5
5-12
F-5-21
5.5.1.2 Service Mode0011-8127
T-5-8
T-5-9
T-5-10
Service mode > F/W update gr.Item Description Settings
USB executes upgrading of the controller firmware* (only if USB) ----NETWORK executes upgrading of the controller firmware ----
Service mode > log gr. Item Description Settings
SYSTEM LOG sets the system log mechanism on*/off
Service mode > Network gr.Item Description Settings
FTP SYSLOG Use it to set the various system log file acquisition functions. on/off*JOB SERIALIZE sets the connector serialization mechanism on/off*
OKUtility
Job
Settings
Reset
Feeder Selection
Cancel Job
Online
Ready Message Job
[3]
[2]
[1]
Chapter 6 APPENDIX
Contents
Contents
6.1 OUTLINE OF ELECTRICAL COMPONENTS...........................................................................................................6-16.1.1 Clutch/Solenoid............................................................................................................................................................................ 6-1
6.1.1.1 Solenoid...........................................................................................................................................................................................................6-16.1.2 Motor............................................................................................................................................................................................ 6-2
6.1.2.1 Motor...............................................................................................................................................................................................................6-26.1.3 Fan................................................................................................................................................................................................ 6-2
6.1.3.1 Fan...................................................................................................................................................................................................................6-26.1.4 Sensor........................................................................................................................................................................................... 6-3
6.1.4.1 Sensor ..............................................................................................................................................................................................................6-36.1.5 Switch .......................................................................................................................................................................................... 6-4
6.1.5.1 Switch..............................................................................................................................................................................................................6-46.1.6 Lamps, Heaters, and Others ......................................................................................................................................................... 6-4
6.1.6.1 Heater ..............................................................................................................................................................................................................6-46.1.7 PCBs ............................................................................................................................................................................................ 6-5
6.1.7.1 PCBs................................................................................................................................................................................................................6-5
Chapter 6
6-1
6.1 OUTLINE OF ELECTRICAL COMPONENTS
6.1.1 Clutch/Solenoid
6.1.1.1 Solenoid0011-0131
F-6-1T-6-1
Notation NameSL1 Manual feed pickup solenoidSL2 Casette pickup solenoid
SL1
SL2
Chapter 6
6-2
6.1.2 Motor
6.1.2.1 Motor0011-0145
F-6-2T-6-2
6.1.3 Fan
6.1.3.1 Fan0011-0150
F-6-3
Notation NameM1 Main motorM2 Fixing motor
M1M2
FM1FM2
Chapter 6
6-3
T-6-3
6.1.4 Sensor
6.1.4.1 Sensor0011-0153
F-6-4T-6-4
Notation NameFM1 Scanner fanFM2 Fixing fan
Notation NameSR1 Face-up tray sensorSR2 Delivery sensorPS2 Duplexing sensorPS4 Cassette paper sensorPS901 paper lead edge sensorPS902 Manual feed tray sensor
SR2 SR1
PS902PS4
PS901PS2
Chapter 6
6-4
6.1.5 Switch
6.1.5.1 Switch0011-0166
F-6-5T-6-5
6.1.6 Lamps, Heaters, and Others
6.1.6.1 Heater0011-0167
F-6-6
Notation NameSW101 Power switchSW401 Door switchSW601 Test print switch
SW101 SW501
SW401
H1
Chapter 6
6-5
T-6-6
6.1.7 PCBs
6.1.7.1 PCBs0011-0169
F-6-7T-6-7
Notation NameH1 Fixing heater
Notation Name[1] Engine controller PCB[2] High-voltage power supply PCB
[1]
[2]
Jan 3 2006
