Sep 8 2007

Service Manual

iR C3100 Series

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."

ContentsContents

Chapter 1 Introduction

1.1 System Construction ..................................................................................................................................1- 11.1.1 Overview of the Delivery Accessories System Configuration..................................................................................1- 11.1.2 Delivery Accessorizes System Configuration 1 ....................................................................................................... 1- 11.1.3 Delivery Accessorizes System Configuration 2 ....................................................................................................... 1- 21.1.4 Delivery Accessorizes System Configuration 3 ....................................................................................................... 1- 31.1.5 Pickup/Original Handling Accessories System Configuration .................................................................................1- 31.1.6 Reader Heater System Configuration......................................................................................................................1- 41.1.7 Cassette Heater System Configuration 1 ................................................................................................................1- 51.1.8 Cassette Heater System Configuration 2 ................................................................................................................1- 61.1.9 Side Deck Heater System Configuration .................................................................................................................1- 61.1.10 System configuration of Accessory for Print/Transmission....................................................................................1- 81.1.11 Functions/Required Accessories List..................................................................................................................... 1- 81.1.12 System configuration of Accessory for Print/Transmission....................................................................................1- 91.1.13 Functions/Required Accessories List................................................................................................................... 1- 101.1.14 Printing/Transmitting Accessories System Configuration ....................................................................................1- 111.1.15 Functions of Printing/Transmitting Accessories...................................................................................................1- 11

1.2 Product Specifications ..............................................................................................................................1- 121.2.1 Names of Parts......................................................................................................................................................1- 12

1.2.1.1 External View ......................................................................................................................................................................... 1- 121.2.1.2 Cross Section......................................................................................................................................................................... 1- 13

1.2.2 Using the Machine................................................................................................................................................. 1- 141.2.2.1 Turning On the Power Switch ................................................................................................................................................ 1- 141.2.2.2 Points to Note About Turning Off the Main Power Switch ..................................................................................................... 1- 151.2.2.3 Control Panel ......................................................................................................................................................................... 1- 16

1.2.3 User Mode Items ...................................................................................................................................................1- 171.2.3.1 Common Settings .................................................................................................................................................................. 1- 171.2.3.2 Timer Settings........................................................................................................................................................................ 1- 181.2.3.3 Adjustment and Cleaning....................................................................................................................................................... 1- 181.2.3.4 Printing Various Reports ........................................................................................................................................................ 1- 191.2.3.5 System Control Settings ........................................................................................................................................................ 1- 191.2.3.6 Copy Function Settings.......................................................................................................................................................... 1- 191.2.3.7 Common Transmission Function Settings ............................................................................................................................. 1- 201.2.3.8 Box Function Settings ............................................................................................................................................................ 1- 201.2.3.9 Printer Function Setting ......................................................................................................................................................... 1- 201.2.3.10 Address List Settings ........................................................................................................................................................... 1- 21

1.2.4 User Maintenance ................................................................................................................................................. 1- 211.2.4.1 Cleaning................................................................................................................................................................................. 1- 211.2.4.2 Inspection............................................................................................................................................................................... 1- 22

1.2.5 Safety ....................................................................................................................................................................1- 231.2.5.1 CDRH Regulations................................................................................................................................................................. 1- 231.2.5.2 Handling the Laser Unit ......................................................................................................................................................... 1- 231.2.5.3 Safety of the Laser Light ........................................................................................................................................................ 1- 241.2.5.4 Safety of Toner ...................................................................................................................................................................... 1- 24

1.2.6 Product Specifications ...........................................................................................................................................1- 241.2.6.1 System and Functions ........................................................................................................................................................... 1- 241.2.6.2 Others .................................................................................................................................................................................... 1- 25

1.2.7 Function List ..........................................................................................................................................................1- 251.2.7.1 First Copy Time...................................................................................................................................................................... 1- 251.2.7.2 Print speed............................................................................................................................................................................. 1- 261.2.7.3 Print speed............................................................................................................................................................................. 1- 271.2.7.4 Types of Paper....................................................................................................................................................................... 1- 29

ContentsChapter 2 Installation

2.1 Making Pre-Checks .................................................................................................................................... 2- 12.1.1 Selecting the Site of Installation ..............................................................................................................................2- 12.1.2 Selecting the Site of Installation...............................................................................................................................2- 52.1.3 Selecting the Site of Installation.............................................................................................................................2- 102.1.4 Making Checks Before Starting the Work ..............................................................................................................2- 122.1.5 Check to Make Before Installation .........................................................................................................................2- 152.1.6 Check to Make Before Installation .........................................................................................................................2- 162.1.7 Check to Make Before Installation .........................................................................................................................2- 18

2.2 Unpacking and Installation ....................................................................................................................... 2- 202.2.1 Points to Note When Turning Off the Main Power .................................................................................................2- 202.2.2 Settings When Mounting the Finisher ....................................................................................................................2- 202.2.3 Unpacking and Removing the Fixing Materials......................................................................................................2- 212.2.4 Points to Note When Turning Off the Main Power .................................................................................................2- 222.2.5 Unpacking and Removing the Fixing Materials......................................................................................................2- 222.2.6 Installing the Drum Unit..........................................................................................................................................2- 222.2.7 Unpacking and Removing the Fixing Materials......................................................................................................2- 242.2.8 Installing the Drum Unit..........................................................................................................................................2- 252.2.9 Preparing for the Mounting of the Developing Assembly.......................................................................................2- 272.2.10 Installing the Drum Unit........................................................................................................................................2- 292.2.11 Preparing for the Mounting of the Developing Assembly .....................................................................................2- 312.2.12 Mounting the Cyan Developing Assembly ...........................................................................................................2- 322.2.13 Preparing for the Mounting of the Developing Assembly .....................................................................................2- 352.2.14 Mounting the Cyan Developing Assembly ...........................................................................................................2- 372.2.15 Mounting the Black Developing Assembly ...........................................................................................................2- 392.2.16 Mounting the Yellow Developing Assembly .........................................................................................................2- 412.2.17 Mounting the Magenta Developing Assembly......................................................................................................2- 422.2.18 After Mounting the Developing Assembly ............................................................................................................2- 422.2.19 Fixing the Machine in Place .................................................................................................................................2- 432.2.20 Mounting the Black Developing Assembly ...........................................................................................................2- 432.2.21 Mounting the Cyan Developing Assembly ...........................................................................................................2- 452.2.22 Connecting the Cable...........................................................................................................................................2- 472.2.23 Connecting the Cable...........................................................................................................................................2- 482.2.24 Mounting the Yellow Developing Assembly .........................................................................................................2- 482.2.25 Mounting the Black Developing Assembly ...........................................................................................................2- 492.2.26 Setting Up the Cassette .......................................................................................................................................2- 512.2.27 Mounting the Magenta Developing Assembly......................................................................................................2- 512.2.28 Mounting the Yellow Developing Assembly .........................................................................................................2- 512.2.29 Mounting the Toner Cartridge ..............................................................................................................................2- 522.2.30 After Mounting the Developing Assembly ............................................................................................................2- 532.2.31 Mounting the Magenta Developing Assembly......................................................................................................2- 542.2.32 Making Initial Settings for the Developing Assembly ...........................................................................................2- 542.2.33 Fixing the Machine in Place .................................................................................................................................2- 552.2.34 After Mounting the Developing Assembly ............................................................................................................2- 552.2.35 Initializing the Drum Unit ......................................................................................................................................2- 562.2.36 Fixing the Machine in Place .................................................................................................................................2- 562.2.37 Connecting the Cable...........................................................................................................................................2- 572.2.38 Connecting the Cable...........................................................................................................................................2- 572.2.39 Automatic Gradation Correction...........................................................................................................................2- 582.2.40 Setting Up the Cassette .......................................................................................................................................2- 582.2.41 Setting Up the Cassette .......................................................................................................................................2- 582.2.42 Mounting the Toner Cartridge ..............................................................................................................................2- 592.2.43 Mounting the Toner Cartridge ..............................................................................................................................2- 612.2.44 Adjusting the Image Position................................................................................................................................2- 632.2.45 Making Initial Settings for the Developing Assembly ...........................................................................................2- 65

Contents2.2.46 Making Initial Settings for the Developing Assembly ...........................................................................................2- 662.2.47 Initializing the Drum Unit......................................................................................................................................2- 662.2.48 Initializing the Drum Unit......................................................................................................................................2- 662.2.49 Others ..................................................................................................................................................................2- 662.2.50 Automatic Gradation Correction ..........................................................................................................................2- 672.2.51 Automatic Gradation Correction ..........................................................................................................................2- 672.2.52 Adjusting the Image Position ...............................................................................................................................2- 682.2.53 Adjusting the Image Position ...............................................................................................................................2- 702.2.54 Attaching Other Parts ..........................................................................................................................................2- 722.2.55 Attaching Other Parts ..........................................................................................................................................2- 732.2.56 When the Machine is Not Connecting to the Network .........................................................................................2- 74

2.3 Checking the Connection to the Network .................................................................................................2- 742.3.1 Checking the Connection to the Network ..............................................................................................................2- 742.3.2 Checking the Connection to the Network ..............................................................................................................2- 742.3.3 Checking the Connection to the Network ..............................................................................................................2- 752.3.4 Using PING............................................................................................................................................................2- 752.3.5 Using PING............................................................................................................................................................2- 752.3.6 Making Checks Using a Remote Host Address..................................................................................................... 2- 762.3.7 Making Checks Using a Remote Host Address..................................................................................................... 2- 762.3.8 Using PING............................................................................................................................................................2- 762.3.9 Making Checks Using a Remote Host Address..................................................................................................... 2- 76

2.4 Troubleshooting the Network....................................................................................................................2- 772.4.1 Troubleshooting the Network.................................................................................................................................2- 772.4.2 Troubleshooting the Network.................................................................................................................................2- 772.4.3 Troubleshooting the Network.................................................................................................................................2- 772.4.4 Making Checks Using a Loopback Address ..........................................................................................................2- 772.4.5 Making Checks Using a Loopback Address ..........................................................................................................2- 772.4.6 Making Checks Using a Loopback Address ..........................................................................................................2- 772.4.7 Making a Check Using a Local Host Address .......................................................................................................2- 772.4.8 Making a Check Using a Local Host Address .......................................................................................................2- 782.4.9 Making a Check Using a Local Host Address .......................................................................................................2- 78

2.5 Checking the Images/Operations .............................................................................................................2- 782.5.1 Checking the Images.............................................................................................................................................2- 782.5.2 Checking the Images.............................................................................................................................................2- 782.5.3 Checking the Images.............................................................................................................................................2- 79

2.6 Relocating the Machine ............................................................................................................................2- 792.6.1 Relocating the Machine .........................................................................................................................................2- 792.6.2 Relocating the Machine .........................................................................................................................................2- 802.6.3 Relocating the Machine .........................................................................................................................................2- 80

2.7 Installing the Copy Tray............................................................................................................................2- 802.7.1 Points to Note at Installation..................................................................................................................................2- 802.7.2 Checking the Contents ..........................................................................................................................................2- 802.7.3 Turning Off the Host Machine................................................................................................................................2- 812.7.4 Installation Procedure............................................................................................................................................2- 81

2.8 Installing the Card Reader ........................................................................................................................2- 822.8.1 Points to Note ........................................................................................................................................................2- 822.8.2 Points to Note ........................................................................................................................................................2- 822.8.3 Checking the Contents ..........................................................................................................................................2- 822.8.4 Checking the Contents ..........................................................................................................................................2- 822.8.5 Installation .............................................................................................................................................................2- 832.8.6 Installation .............................................................................................................................................................2- 852.8.7 Using with NetSpot Accountant (NSA) ..................................................................................................................2- 872.8.8 Points to Note at Installation..................................................................................................................................2- 872.8.9 Checking the Contents ..........................................................................................................................................2- 882.8.10 Turning Off the Host Machine..............................................................................................................................2- 88

Contents2.8.11 Installation Procedure ..........................................................................................................................................2- 892.8.12 Installation Procedure in the imageWARE Accounting Manager (hereinafter referred to iWAM) Environment ...2- 91

2.9 Installing the NE Controller-A1 ................................................................................................................. 2- 912.9.1 Installing the NE Controller-A1...............................................................................................................................2- 912.9.2 Installing the NE Controller-A1...............................................................................................................................2- 98

2.10 Installing the Original Tray...................................................................................................................... 2- 992.10.1 Checking the Contents.........................................................................................................................................2- 992.10.2 Installation Procedure ........................................................................................................................................2- 100

2.11 Installing the Key Switch Unit ............................................................................................................... 2- 1012.11.1 Checking the Contents.......................................................................................................................................2- 1012.11.2 Checking the Contents.......................................................................................................................................2- 1012.11.3 Installation ..........................................................................................................................................................2- 1012.11.4 Installation ..........................................................................................................................................................2- 1042.11.5 Making Checks After Installation........................................................................................................................2- 1062.11.6 Making Checks After Installation........................................................................................................................2- 1062.11.7 Checking the Contents.......................................................................................................................................2- 1062.11.8 Turning Off the Host Machine ............................................................................................................................2- 1072.11.9 Installation Procedure ........................................................................................................................................2- 1072.11.10 Checking After Installation................................................................................................................................2- 109

2.12 Installing the Reader Heater ................................................................................................................. 2- 1092.12.1 Checking the Contents.......................................................................................................................................2- 1092.12.2 Checking the Contents.......................................................................................................................................2- 1102.12.3 Installation ..........................................................................................................................................................2- 1112.12.4 Installation ..........................................................................................................................................................2- 1142.12.5 Checking the Contents.......................................................................................................................................2- 1162.12.6 Turning Off the Host Machine ............................................................................................................................2- 1162.12.7 Installation ..........................................................................................................................................................2- 116

2.13 Installing the Cassette Heater .............................................................................................................. 2- 1182.13.1 Checking the Parts.............................................................................................................................................2- 1182.13.2 Turning Off the Host Machine ............................................................................................................................2- 1192.13.3 Installation Procedure (Heater PCB)..................................................................................................................2- 1202.13.4 Installation Procedure (Cassette Heater Attachment)........................................................................................2- 1232.13.5 Installation Procedure (Cassette Heater) ...........................................................................................................2- 1262.13.6 After Installation .................................................................................................................................................2- 129

2.14 Installing the Voice Guidance Kit .......................................................................................................... 2- 1302.14.1 Checking Items in the Package..........................................................................................................................2- 1302.14.2 Turning Off the Host Machine ............................................................................................................................2- 1302.14.3 Installation Procedure .......................................................................................................................................2- 1312.14.4 Checking the Contents.......................................................................................................................................2- 1372.14.5 Turning Off the Host Machine ............................................................................................................................2- 1382.14.6 Installation Procedure ........................................................................................................................................2- 138

Chapter 3 Basic Operation

3.1 Construction ............................................................................................................................................... 3- 13.1.1 Functional construction ............................................................................................................................................3- 13.1.2 Connections Among Major PCBs ............................................................................................................................3- 13.1.3 Connections Among Major PCBs ............................................................................................................................3- 33.1.4 DC Controller PCB...................................................................................................................................................3- 4

3.2 Basic Sequence ......................................................................................................................................... 3- 43.2.1 Basic Sequence of Operations at Power-On ...........................................................................................................3- 43.2.2 Basic Sequence of Operations for a Print Job (full color) ........................................................................................3- 53.2.3 Basic Sequence of Operations for a Print Job (mono color)....................................................................................3- 6

Chapter 4 Main Controller

Contents4.1 Construction ...............................................................................................................................................4- 14.1.1 Construction and Functions.....................................................................................................................................4- 14.1.2 Functional Construction...........................................................................................................................................4- 14.1.3 Functional Construction...........................................................................................................................................4- 3

4.2 Construction of the Electrical Circuitry........................................................................................................4- 44.2.1 Main Controller PCB (main).....................................................................................................................................4- 44.2.2 Main Controller PCB (main).....................................................................................................................................4- 64.2.3 Main Controller PCB (main).....................................................................................................................................4- 74.2.4 Main Controller PCB (main).....................................................................................................................................4- 84.2.5 Main Controller PCB (main).....................................................................................................................................4- 84.2.6 Main Controller PCB (sub).......................................................................................................................................4- 94.2.7 Expansion Bus PCB .............................................................................................................................................. 4- 104.2.8 SRAM PCB............................................................................................................................................................4- 104.2.9 SRAM PCB............................................................................................................................................................4- 114.2.10 HDD.....................................................................................................................................................................4- 11

4.3 Start-Up Sequence ...................................................................................................................................4- 134.3.1 Overview................................................................................................................................................................4- 134.3.2 Overview................................................................................................................................................................4- 144.3.3 Start-Up Sequence ................................................................................................................................................4- 144.3.4 Start-Up Sequence ................................................................................................................................................4- 15

4.4 Actions when HDD Error...........................................................................................................................4- 174.4.1 E602 in Detail ........................................................................................................................................................4- 174.4.2 E602 in Detail (iR C3170/C2570, iR C3180/C2580 Series) ..................................................................................4- 20

4.5 Image Processing.....................................................................................................................................4- 234.5.1 Construction of Image Processing Modules ..........................................................................................................4- 234.5.2 Reader Input Image Processing ............................................................................................................................4- 244.5.3 Compression, Decompression, and Edit Processing Blocks.................................................................................4- 254.5.4 Printer Output Image Processing ..........................................................................................................................4- 254.5.5 Construction of Image Processing Modules ..........................................................................................................4- 264.5.6 Reader Input Image Processing ............................................................................................................................4- 284.5.7 Compression, Decompression, and Edit Processing Blocks.................................................................................4- 284.5.8 Printer Output Image Processing ..........................................................................................................................4- 294.5.9 Outline of the Flow of Image Processing...............................................................................................................4- 294.5.10 Construction of the Image Processing Module ....................................................................................................4- 304.5.11 Compression/Decompression and Editing Blocks ...............................................................................................4- 304.5.12 Printer Output Image Processing.........................................................................................................................4- 31

4.6 Flow of Image Data ..................................................................................................................................4- 324.6.1 Flow of Image Data (copier function).....................................................................................................................4- 324.6.2 Flow of Image Data for Copier Functions ..............................................................................................................4- 334.6.3 Flow of Image Data (Box function) ........................................................................................................................4- 334.6.4 Flow of Image Data for Box Functions ..................................................................................................................4- 344.6.5 Flow of Image Data (SEND function) ....................................................................................................................4- 344.6.6 Flow of Image Data for SEND Functions...............................................................................................................4- 354.6.7 Flow of Image Data (fax transmission) ..................................................................................................................4- 354.6.8 Flow of Image Data for Fax Transmission Functions ............................................................................................4- 364.6.9 Image Data Flow for Fax Reception Functions ..................................................................................................... 4- 364.6.10 Flow of Image Data for Fax Reception Functions................................................................................................4- 374.6.11 Flow of Image Data (PDL function)......................................................................................................................4- 374.6.12 Flow of Image Data for PDL Functions................................................................................................................4- 384.6.13 Flow of Image Data for Copier Functions ............................................................................................................4- 384.6.14 Flow of Image Data for Box Functions.................................................................................................................4- 394.6.15 Flow of Image Data for SEND Functions.............................................................................................................4- 394.6.16 Flow of Image Data for Fax Transmission Functions ..........................................................................................4- 404.6.17 Flow of Image Data for Fax Reception Functions................................................................................................4- 404.6.18 Flow of Image Data for PDL Functions................................................................................................................4- 41

Contents4.7 Parts Replacement Procedure ................................................................................................................. 4- 414.7.1 Controller Box ........................................................................................................................................................4- 41

4.7.1.1 Removing the Controller Box ................................................................................................................................................. 4- 414.7.1.2 Before Removing Controller Box ........................................................................................................................................... 4- 424.7.1.3 Before Removing Controller Box ........................................................................................................................................... 4- 424.7.1.4 Removing Controller Box ....................................................................................................................................................... 4- 43

4.7.2 Main Controller PCB (main) ...................................................................................................................................4- 444.7.2.1 Before Removing Main Controller PCB (main) ...................................................................................................................... 4- 444.7.2.2 Removing the Main Controller PCB (main)............................................................................................................................ 4- 444.7.2.3 After Replacing the Main Controller PCB (main) ................................................................................................................... 4- 454.7.2.4 Before Removing Main Controller PCB (main) ...................................................................................................................... 4- 454.7.2.5 Removing Main Controller PCB (main).................................................................................................................................. 4- 454.7.2.6 Removing Main Controller PCB (main).................................................................................................................................. 4- 464.7.2.7 After Replacing Main Controller PCB (main) ......................................................................................................................... 4- 484.7.2.8 After Replacing Main Controller PCB (main) ......................................................................................................................... 4- 48

4.7.3 Main Controller PCB (sub) .....................................................................................................................................4- 484.7.3.1 Before Removing Main Controller PCB (sub) ........................................................................................................................ 4- 484.7.3.2 Removing the Main Controller PCB (sub).............................................................................................................................. 4- 484.7.3.3 Before Removing Main Controller PCB (sub) ........................................................................................................................ 4- 484.7.3.4 Removing Main Controller PCB (sub-R-A) ............................................................................................................................ 4- 484.7.3.5 Removing Main Controller PCB (sub PE-A) .......................................................................................................................... 4- 494.7.3.6 Removing Main Controller PCB (sub PE-A) .......................................................................................................................... 4- 494.7.3.7 Removing Relay PCB (Gu-short)........................................................................................................................................... 4- 494.7.3.8 Removing Relay PCB (Gu-short)........................................................................................................................................... 4- 494.7.3.9 Removing Main Controller PCB (sub SJ-A) ........................................................................................................................... 4- 494.7.3.10 Removing Main Controller PCB (sub SJ-A) ......................................................................................................................... 4- 494.7.3.11 Removing Main Controller PCB (sub LAN-bar-A) ................................................................................................................ 4- 504.7.3.12 Removing Main Controller PCB (sub LAN-bar-A) ................................................................................................................ 4- 50

4.7.4 Expansion Bus PCB...............................................................................................................................................4- 504.7.4.1 Removing the Rear Cover (right) ........................................................................................................................................... 4- 504.7.4.2 Removing the SRAM Board................................................................................................................................................... 4- 504.7.4.3 Removing the Expansion Bus PCB ....................................................................................................................................... 4- 504.7.4.4 After Replacing the Expansion Bus PCB ............................................................................................................................... 4- 51

4.7.5 SRAM PCB ............................................................................................................................................................4- 514.7.5.1 Removing the Rear Cover (right) ........................................................................................................................................... 4- 514.7.5.2 Removing the SRAM Board................................................................................................................................................... 4- 514.7.5.3 After Replacing the SRAM Board .......................................................................................................................................... 4- 51

4.7.6 UFR Board .............................................................................................................................................................4- 514.7.6.1 Removing the Rear Cover (right) ........................................................................................................................................... 4- 514.7.6.2 Removing the UFR Board...................................................................................................................................................... 4- 52

4.7.7 Ethernet Board.......................................................................................................................................................4- 524.7.7.1 Removing the Rear Cover (right) ........................................................................................................................................... 4- 524.7.7.2 Removing the Ethernet Board................................................................................................................................................ 4- 52

4.7.8 HDD .......................................................................................................................................................................4- 524.7.8.1 Making a Backup of Data (reference only)............................................................................................................................. 4- 524.7.8.2 Handling HDD ........................................................................................................................................................................ 4- 534.7.8.3 Before Removing HDD .......................................................................................................................................................... 4- 534.7.8.4 Removing the HDD ................................................................................................................................................................ 4- 544.7.8.5 After Replacing the HDD........................................................................................................................................................ 4- 544.7.8.6 Before Removing HDD .......................................................................................................................................................... 4- 544.7.8.7 Removing HDD ...................................................................................................................................................................... 4- 544.7.8.8 After Replacing HDD.............................................................................................................................................................. 4- 55

4.7.9 Controller Fan ........................................................................................................................................................4- 554.7.9.1 Before Removing Controller Fan ........................................................................................................................................... 4- 554.7.9.2 Removing Controller Fan ....................................................................................................................................................... 4- 55

Chapter 5 Original Exposure System

5.1 Construction ............................................................................................................................................... 5- 15.1.1 Specifications, Control Mechanisms, and Functions ...............................................................................................5- 1

Contents5.1.2 Major Components ..................................................................................................................................................5- 15.1.3 Construction of the Control System.........................................................................................................................5- 25.1.4 Reader Controller PCB............................................................................................................................................5- 3

5.2 Basic Sequence..........................................................................................................................................5- 45.2.1 Basic Sequence of Operations at Power-On...........................................................................................................5- 45.2.2 Basic Sequence of Operations in Response to a Press on the Start Key (book mode, 1 original) .........................5- 55.2.3 Basic Sequence of Operations in Response to a Press on the Start Key (ADF mode, 1 original) ..........................5- 5

5.3 Various Control Mechanisms......................................................................................................................5- 65.3.1 Controlling the Scanner Drive System..................................................................................................................... 5- 6

5.3.1.1 Overview .................................................................................................................................................................................. 5- 65.3.1.2 Reader Motor Control .............................................................................................................................................................. 5- 6

5.3.2 Contact Image Sensor (CIS) ...................................................................................................................................5- 75.3.2.1 Overview .................................................................................................................................................................................. 5- 75.3.2.2 Analog Control Inside the Contact Image Sensor (CIS) .......................................................................................................... 5- 8

5.3.3 Enlargement/Reduction ...........................................................................................................................................5- 95.3.3.1 Changing the Magnification in Main Scanning Direction.......................................................................................................... 5- 95.3.3.2 Changing the Magnification in Sub Scanning Direction ........................................................................................................... 5- 9

5.3.4 Controlling the Scanning Lamp ...............................................................................................................................5- 95.3.4.1 Scanning Lamp ........................................................................................................................................................................ 5- 95.3.4.2 Overview .................................................................................................................................................................................. 5- 95.3.4.3 Activation Control................................................................................................................................................................... 5- 105.3.4.4 Error Detection....................................................................................................................................................................... 5- 10

5.3.5 Detecting the Size of Originals ..............................................................................................................................5- 105.3.5.1 Overview ................................................................................................................................................................................ 5- 105.3.5.2 Points of Original Size Detection ........................................................................................................................................... 5- 105.3.5.3 Overview of Detection Operation ........................................................................................................................................... 5- 11

5.3.6 Dirt Sensor Control ................................................................................................................................................5- 135.3.6.1 Overview ................................................................................................................................................................................ 5- 13

5.3.7 Image Processing..................................................................................................................................................5- 155.3.7.1 Overview ................................................................................................................................................................................ 5- 155.3.7.2 Driving the CCD ..................................................................................................................................................................... 5- 165.3.7.3 Gain Correction and Offset Correction for the CCD Output................................................................................................... 5- 165.3.7.4 A/D Conversion of the CCD Output ....................................................................................................................................... 5- 165.3.7.5 Shading Correction (outline) .................................................................................................................................................. 5- 175.3.7.6 Shading Correction ................................................................................................................................................................ 5- 175.3.7.7 Shading Adjustment............................................................................................................................................................... 5- 17

5.4 Parts Replacement Procedure .................................................................................................................5- 175.4.1 Copyboard Glass...................................................................................................................................................5- 17

5.4.1.1 Detaching Copyboard Glass .................................................................................................................................................. 5- 175.4.1.2 After Replacing Copyboard Glass.......................................................................................................................................... 5- 175.4.1.3 Detaching ADF Reading Glass .............................................................................................................................................. 5- 185.4.1.4 After Replacing ADF Reading Glass ..................................................................................................................................... 5- 18

5.4.2 Reader Controller PCB..........................................................................................................................................5- 185.4.2.1 Before Replacing Reader Controller PCB.............................................................................................................................. 5- 185.4.2.2 Before Detaching Reader Controller PCB ............................................................................................................................. 5- 185.4.2.3 Detaching Reader Controller PCB ......................................................................................................................................... 5- 185.4.2.4 After Replacing Reader Controller PCB................................................................................................................................. 5- 20

5.4.3 Inverter PCB ..........................................................................................................................................................5- 215.4.3.1 Before Detaching Inverter PCB.............................................................................................................................................. 5- 215.4.3.2 Detaching Inverter PCB ......................................................................................................................................................... 5- 21

5.4.4 Scanner Motor .......................................................................................................................................................5- 215.4.4.1 Removing Scanner Motor ...................................................................................................................................................... 5- 21

5.4.5 Contact Sensor......................................................................................................................................................5- 215.4.5.1 Before Detaching Contact Image Sensor (CIS) ..................................................................................................................... 5- 215.4.5.2 Detaching Contact Image Sensor (CIS)................................................................................................................................. 5- 215.4.5.3 After Replacing Contact Image Sensor (CIS) ........................................................................................................................ 5- 22

5.4.6 Original Cover Sensor ...........................................................................................................................................5- 225.4.6.1 Detaching Copyboard Cover Sensor (front/rear) ................................................................................................................... 5- 22

5.4.7 Contact Sensor HP Sensor ...................................................................................................................................5- 23

Contents

5.4.7.1 Before Detaching Contact Sensor HP Sensor ....................................................................................................................... 5- 23

5.4.7.2 Detaching Contact Sensor HP Sensor................................................................................................................................... 5- 23

5.4.8 Original Sensor ......................................................................................................................................................5- 235.4.8.1 Before Detaching Document Size Sensor (AB/INCH-configuration)...................................................................................... 5- 235.4.8.2 Detaching Document Size Sensor (AB/INCH-configuration) ................................................................................................. 5- 23

5.4.9 Reader Heater (option) ..........................................................................................................................................5- 245.4.9.1 Detaching Reader Heater (right)............................................................................................................................................ 5- 245.4.9.2 Detaching Reader Heater (left) .............................................................................................................................................. 5- 24

Chapter 6 Laser Exposure

6.1 Construction ............................................................................................................................................... 6- 16.1.1 Specifications, Control Mechanisms, and Functions ...............................................................................................6- 16.1.2 Major Components...................................................................................................................................................6- 16.1.3 Construction of the Control System .........................................................................................................................6- 2

6.2 Basic Sequence ......................................................................................................................................... 6- 36.2.1 Basic Sequence of Operations ................................................................................................................................6- 3

6.3 Various Control........................................................................................................................................... 6- 46.3.1 Controlling the Laser Activation Timing ...................................................................................................................6- 4

6.3.1.1 Turning On and Off the Laser Unit........................................................................................................................................... 6- 46.3.1.2 Main Scanning Synchronization Control .................................................................................................................................. 6- 56.3.1.3 Sub Scanning Direction Write Start Position Control ............................................................................................................... 6- 6

6.3.2 Controlling the Intensity of Laser Light.....................................................................................................................6- 66.3.2.1 APC Control ............................................................................................................................................................................. 6- 66.3.2.2 PWM Control............................................................................................................................................................................ 6- 6

6.3.3 Controlling the Laser Scanner Motor .......................................................................................................................6- 66.3.3.1 Laser Scanner Motor Control................................................................................................................................................... 6- 6

6.3.4 Controlling the Laser Shutter ...................................................................................................................................6- 76.3.4.1 Laser Shutter Control............................................................................................................................................................... 6- 7

6.4 Parts Replacement Procedure ................................................................................................................... 6- 86.4.1 Laser Scanner Unit ..................................................................................................................................................6- 8

6.4.1.1 Before Removing Laser Scanner Unit ..................................................................................................................................... 6- 86.4.1.2 Removing Laser Scanner Unit ................................................................................................................................................. 6- 86.4.1.3 After Replacing Laser Scanner Unit......................................................................................................................................... 6- 9

6.4.2 Dust-Proofing Glass Cleaning Pad ..........................................................................................................................6- 96.4.2.1 Detaching Dust-Blocking Glass Cleaning Pad......................................................................................................................... 6- 9

Chapter 7 Image Formation

7.1 Construction ............................................................................................................................................... 7- 17.1.1 Specifications of the Image Formation System........................................................................................................7- 17.1.2 Major Components of the Image Formation System ...............................................................................................7- 27.1.3 Specifications of the Charging System ....................................................................................................................7- 2

7.2 Image Formation Process .......................................................................................................................... 7- 47.2.1 Image Formation Process (outline)..........................................................................................................................7- 47.2.2 Image Formation Process (image formation)...........................................................................................................7- 57.2.3 2-Side Placement Control ........................................................................................................................................7- 6

7.3 Basic Sequence ......................................................................................................................................... 7- 67.3.1 Power-On.................................................................................................................................................................7- 67.3.2 Copying/Printing (normal speed) .............................................................................................................................7- 77.3.3 Copying/Printing (half-speed) ..................................................................................................................................7- 87.3.4 Copying/Printing a Mix of Color and Black-and-White Originals..............................................................................7- 8

7.4 Image Stabilization Control ........................................................................................................................ 7- 87.4.1 Outline of Image Stabilization Control......................................................................................................................7- 87.4.2 Timing of Image Stabilization Control ......................................................................................................................7- 97.4.3 ATR Control ...........................................................................................................................................................7- 107.4.4 Drum Film Thickness Detection Control ................................................................................................................7- 12

Contents7.4.5 Development Contrast Control ..............................................................................................................................7- 127.4.6 ATVC Control ........................................................................................................................................................7- 137.4.7 PASCAL Control (image gradation density correction) .........................................................................................7- 137.4.8 Development Gradation Density Correction Control .............................................................................................7- 147.4.9 Auto Gradation Correction Function ......................................................................................................................7- 14

7.5 Drum Unit .................................................................................................................................................7- 147.5.1 Drum Unit ..............................................................................................................................................................7- 14

7.5.1.1 Construction of the Drum Unit................................................................................................................................................ 7- 147.5.1.2 Charging Bias Control ............................................................................................................................................................ 7- 157.5.1.3 Drum Cleaning ....................................................................................................................................................................... 7- 167.5.1.4 Drum Unit Drive Path ............................................................................................................................................................. 7- 16

7.6 Developing Rotary ....................................................................................................................................7- 177.6.1 Construction of the Developing Rotary..................................................................................................................7- 177.6.2 Developing Rotary Control ....................................................................................................................................7- 187.6.3 Developing Assembly Drive Path ..........................................................................................................................7- 19

7.7 Developing Unit ........................................................................................................................................7- 207.7.1 Construction of the Developing Unit ......................................................................................................................7- 207.7.2 ACR Control (Auto Carrier Refresh control) ..........................................................................................................7- 217.7.3 Developing Bias Control ........................................................................................................................................7- 23

7.8 Toner Container........................................................................................................................................7- 237.8.1 Construction of the Toner Cartridge ......................................................................................................................7- 237.8.2 Toner Level Detection Control...............................................................................................................................7- 247.8.3 Toner Supply Control.............................................................................................................................................7- 25

7.9 Transfer Device ........................................................................................................................................7- 267.9.1 Construction of the Transfer Assembly .................................................................................................................7- 267.9.2 ITB Home Position Detection Control....................................................................................................................7- 277.9.3 Transfer Bias Control.............................................................................................................................................7- 287.9.4 Cleaning the Intermediate Transfer Belt (ITB).......................................................................................................7- 297.9.5 Cleaning the Secondary Transfer Outside Roller ..................................................................................................7- 307.9.6 ITB Waste Toner Collection Mechanism ...............................................................................................................7- 307.9.7 Transfer Assembly Drive Path...............................................................................................................................7- 317.9.8 Transfer Assembly Swing Control .........................................................................................................................7- 327.9.9 Transfer Assembly Swing Control .........................................................................................................................7- 337.9.10 Separation ...........................................................................................................................................................7- 34

7.10 Parts Replacement Procedure................................................................................................................7- 357.10.1 Drum Unit.............................................................................................................................................................7- 35

7.10.1.1 Removing Drum Unit............................................................................................................................................................ 7- 357.10.1.2 Points to Note When Attaching Drum Unit ........................................................................................................................... 7- 367.10.1.3 After Replacing Drum Unit ................................................................................................................................................... 7- 36

7.10.2 Development Unit ................................................................................................................................................7- 377.10.2.1 Finisher-P1 in Use................................................................................................................................................................ 7- 377.10.2.2 Before Removing Developing Unit ....................................................................................................................................... 7- 377.10.2.3 Removing Developing Unit................................................................................................................................................... 7- 377.10.2.4 Points to Note When Attaching Developing Unit .................................................................................................................. 7- 397.10.2.5 After Replacing Developing Unit (Y/M/C)............................................................................................................................. 7- 397.10.2.6 After Replacing Developing Unit (Bk)................................................................................................................................... 7- 39

7.10.3 Rotary Upper Cover.............................................................................................................................................7- 397.10.3.1 Detaching Rotary Upper Cover ............................................................................................................................................ 7- 397.10.3.2 Points to Note When Attaching Drum Unit ........................................................................................................................... 7- 40

7.10.4 Rotary Lower Cover.............................................................................................................................................7- 407.10.4.1 Before Detaching Rotary Lower Cover ................................................................................................................................ 7- 407.10.4.2 Detaching Rotary Lower Cover ............................................................................................................................................ 7- 40

7.10.5 ITB Cleaning Unit................................................................................................................................................. 7- 407.10.5.1 Preparing for the Removal of ITB Cleaning Unit .................................................................................................................. 7- 407.10.5.2 Removing the Delivery Tray................................................................................................................................................. 7- 417.10.5.3 Removing the Delivery Tray Lower Cover ........................................................................................................................... 7- 417.10.5.4 Removing the ITB Waste Toner Unit ................................................................................................................................... 7- 41

Contents

7.10.5.5 Before Removing ITB Cleaning Unit .................................................................................................................................... 7- 41

7.10.5.6 Removing ITB Cleaning Unit................................................................................................................................................ 7- 417.10.5.7 Points to Note When Attaching ITB Cleaning Unit ............................................................................................................... 7- 42

7.10.6 ITB Waste Toner Unit...........................................................................................................................................7- 437.10.6.1 Removing ITB Waste Toner Unit ......................................................................................................................................... 7- 43

7.10.7 Intermediate Transfer Unit ...................................................................................................................................7- 447.10.7.1 Before Removing Intermediate Transfer Unit (ITB Unit) ...................................................................................................... 7- 447.10.7.2 Before Removing Intermediate Transfer Unit (ITB Unit) ...............................................................................................