RICOH fw830_sm

8/7/2019 RICOH fw830_sm

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IMPORTANT SAFETY NOTICES

PREVENTION OF PHYSICAL INJURY

1. Before disassembling or assembling parts of the copier and peripherals,make sure that the copier power cord is unplugged.

2. The wall outlet should be near the copier and easily accessible.

3. Note that some components of the copier and the peripherals are

supplied with electrical voltage even if the main switch is turned off.

4. If any adjustment or operation check has to be made with exterior coversoff or open while the main switch is turned on, keep hands away from

electrified or mechanically driven components.

5. The inside and the metal parts of the fusing unit become extremely hotwhile the copier is operating. Be careful to avoid touching those

components with your bare hands.

HEALTH & SAFETY CONDITIONS

1. Never operate the copier without the ozone filters installed.

2. Always replace the ozone filters with the specified ones at the specified

intervals.

3. Toner and developer are non-toxic, but if you get either of them in your

eyes by accident, it may cause temporary eye discomfort. Try to remove

with eye drops or flush with water as first aid. If unsuccessful, get medicalattention.

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OBSERVANCE OF ELECTRICAL SAFETY STANDARDS

1. The copier and its peripherals must be installed and maintained by a

customer service representative who has completed the training course

on those models.

2. The RAM board on the main control board has a lithium battery which can

explode if replaced incorrectly. Replace the battery only with an identical

one. The manufacturer recommends replacing the entire RAM board. Do

not recharge or burn this battery. Used batteries must be handled inaccordance with local regulations.

SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL

1. Do not incinerate the toner cartridge or the used toner. Toner dust mayignite suddenly when exposed to open flame.

2. Dispose of used toner, developer, and organic photoconductors

according to local regulations. (These are non-toxic supplies.)

3. Dispose of replaced parts in accordance with local regulations.

4. When keeping used lithium batteries in order to dispose of them later, donot put more than 100 batteries per sealed box. Storing larger numbers or

not sealing them apart may lead to chemical reactions and heat build-up.

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SECTION 1

OVERALL MACHINE INFORMATION

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1. SPECIFICATIONS

Configuration: Table top

Copy Process: Electrostatic transfer system

Original Feed: Sheet feed

Original Size: Maximum: 914 x 3,600 mm

Minimum: 182 x 257 mm (B5 lengthwise)

Copy Size: Same as "Original Size"

Copying Speed: Manual feed: 6 cpm (A1/D sideways)

Sheet & Roll feed: 7 cpm (A1/D sideways)

First Copy: 19 seconds (A1 sideways)

Warm-up Time: Within 6.5 minutes (Room temperature 20oC)

Multi-Copy: 1 to 10 (A1/D or smaller)

1 to 5 (A0/E)

Automatic Reset: 2 minutes after copying is finished (can be setto 1, 3, 4, or 5 minutes or to no auto reset)

Photoconductor: Organic photoconductor drum

Drum Charge: Single-wire with grid plate (Negative Charge)

Reproduction Ratio: 1 : 1 (±0.5%)

Exposure System: Slit exposure via fiber optic array

Exposure Lamp: Fluorescent lamp (65 W)

Development: Dual-component dry toner system

Toner Replenishment: Cartridge system (750 g toner/cartridge)

Toner Consumption: 1,860 A1 or D copies per cartridge (6% original)

Development Bias: Negative

Toner Density Control: Pattern density detection by photosensor and

direct toner density detection by induction

sensor

Image Density Adjustment: Development bias control + exposure control

Auto Image Density

Control:

Development bias control and exposure control

31 December 1992 SPECIFICATIONS

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Image Transfer: Single wire dc corona (negative charge) withpre-transfer lamp

Paper Separation: Dual wire ac corona and pick-off pawls

Cleaning: Cleaning bladeQuenching: Photo quenching by LEDs

Paper Feeding: Manual feed (sheet and roll feeder optional)

Image Fusing: Heat and pressure type, teflon (upper) and

silicone rubber (lower) rollers

Fusing Lamp: Halogen lamp (115 V: 1,100 W, 220/240 V:

1,100 W)Self-diagnostic Codes: 14 codes, displayed in copy counter

Power Source: 115 V/60 Hz....15 A220 V/50 Hz....7 A

240 V/50 Hz....7 A

Power Consumption: Maximum: 1.47 kWWarm-up: 1.25 kW

Ready: 0.1 to 1.2 kWCopy cycle: 1.42 kW

Dimensions (W x D x H): 1,410 x 800 x 600 mm

55.51 x 31.50 x 23.62 in

Weight: 180 kg, 397 lb

Optional Equipment: Sheet feeder

Roll feeder

Roll feeder connector Paper spool

Table

SPECIFICATIONS 31 December 1992

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2. MACHINE CONFIGURATION

This copier can be equipped with optional equipment as show above.

1. Copier (A098)

2. Sheet Feeder (A453)

3. Roll Feeder (A454) and Connector (A384)

4. Roll Feeder (A454) and Sheet Feeder (A453)

3

2

4

1

31 December 1992 MACHINE CONFIGURATION

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3. DRUM PROCESSES

1. ChargeIn the dark the charge corona unit applies a negative charge to the drum.

The grid plate ensures the charge is applied uniformly. The charge remains

on the surface of the drum because the photoconductive drum has a highelectrical resistance in the dark.

2. ExposureHigh intensity light from a fluorescent lamp is reflected from the moving

original through the fiber optic array. The charge on the drum surface is

dissipated in direct proportion to the intensity of the reflected light, thus

producing an electric latent image on the drum surface.

12

3

4

5 6

7

8

DRUM PROCESSES 31 December 1992

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3. DevelopmentThe magnetic developer brush on the development roller comes in contact

with the latent image on the drum surface. Toner particles are

electrostatically attracted to the negatively charged latent image areas.

4. Pre-Transfer LampThe pre-transfer lamp illuminates the drum prior to image transfer. Thisreduces the attraction between the toner and the drum, thus making image

transfer easier.

5. Image TransferCopy paper is fed to the drum surface, at the exact timing, to align the copy

paper and the developed image on the drum surface. Then a strong negative

charge is applied to the back side of the paper. The negative charge pulls

the toner particles from the drum surface onto the paper.

6. Paper SeparationA strong ac corona discharge is applied to the back side of the copy paper,

reducing the charge on the paper and breaking the electrostatic attraction

between the paper and the drum. Then, the stiffness of the copy papercauses it to separate from the drum. The pick-off pawls help to separate

paper which has low stiffness.

7. CleaningThe cleaning blade removes any toner remaining on the drum surface.

8. QuenchingThe light from the quenching lamp electrically neutralizes the surface of thedrum.

31 December 1992 DRUM PROCESSES

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4. MECHANICAL COMPONENT LAYOUT

25

24

23

22

21

20

19

1817

16

15

14

131211

108765

9

32136

3533

32

31

30

29

28

27

26

4

34

MECHANICAL COMPONENT LAYOUT 31 December 1992

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1. Front Original Feed Roller

2. Exposure Lamp

3. 1st Press Rollers

4. Fiber Optic Array

5. Platen Roller

6. Charge Corona Unit

7. Cleaning Blade

8. Original Registration

Rollers

9. 4th Press Rollers

10. Rear Table Lever

11. 2nd Press Rollers

12. Rear Original Feed Roller

13. 3rd Press Roller

14. Switch Back Gate

15. Hot Roller

16. Upper Exit Rollers

17. Exit Gate

18. Exit Rollers

19. Pressure Roller

20. Transport Belt

21. Pick-off Pawls

22. T/S Corona Unit

23. Paper Registration Rollers

24. Lower Copy Guide

25. Table

26. Roll Feeder

27. Manual Feed Rollers

28. Sheet Feeder

29. Manual Feed Table

30. Original Guides

31. Development Roller

32. Toner Cartridge

33. OPC Drum

34. Original Table

35. 5th Press Roller

36. Original Recycle Gate

31 December 1992 MECHANICAL COMPONENT LAYOUT

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5. DRIVE LAYOUT

1. Original Drive Belt 2

2. Rear Original Feed Rollers

3. Original Drive Clutch

4. Main Drive Motor

5. Original Registration

Rollers

6. Original Drive Belt 37. Platen Roller

8. Front Original Feed Rollers

9. Development Roller Gear

10. Auger Gear

11. Toner Supply Clutch

12. Development Motor

13. Paper Feed Clutch

14. Paper Feed Drive Chain

15. Development Drive Belt

16. Paddle Roller Gear

17. Registration Roller Clutch

18. Drum Drive Gear

19. Toner Collection Coil Gear

20. Feed/Fusing Drive Belt 2

21. Fusing Drive Chain

22. Drum Drive Belt

23. Feed/Fusing Drive Belt 1

24. Transport Roller Sprocket

25. Hot Roller Sprocket

26. Exit Roller Drive Chain

27. Lower Exit Roller Sprocket

28. Original Reverse DriveBelt 1

29. Upper Exit Roller Sprocket

30. Original Reverse Drive

Belt 2

31. Original Drive Belt 1

28

910

11

12

13

14

151617182023

24

25

31

27

8

7

6

54

3230

19

29

2122

26

1

DRIVE LAYOUT 31 December 1992

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6. ELECTRICAL COMPONENT DESCRIPTIONS

Refer to the electrical component layout on the reverse side of the Point to

Point (Water proof paper) index numbers.

Name Function Index. No.

Motors

Main Drives all mechanical components except thedevelopment unit and the fans. (100 Vac)

5

Development Drives the development unit. (100 Vac) 1

Exhaust Fan Removes heat from around the fusing unit.

(100 Vac)

25

Cooling Fan Provides air flow to the optics cavity. (100 Vac) 6

Vacuum Fan Provides suction so that paper is held firmly

on the transport belts and rollers. (100 Vac)

68

Magnetic Clutches

Original

Forward Feed

Drives the original forward feed mechanism. 52

Registration Drives the registration rollers. 50

Original Re-

verse Feed

Drives the original reverse feed mechanism. 8

Solenoids

Toner Supply Turns on to supply toner to the development

unit.

46

Pattern Shutter On ID check cycles, this solenoid turns on to

move the pattern plate into the light path.

19

Exit Gate Controls the position of the exit gate. (When

ON, the paper exits downward; when OFF,

the paper exits upward.)

24

Pick-off Pawl Moves the pick-off pawls against the drum. 34

Paper Stopper Moves the paper stopper down to prevent

paper from being inserted.

40

Manual Feed Turns ON to engage the manual feed clutch. 48

Recycle Gate Controls the position of the recycle gate.(ON = recycle gate in down position,

OFF = recycle gate in up position.)

26

31 December 1992 ELECTRICAL COMPONENT DESCRIPTIONS

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Switch Back

Gate

Lifts the switch back gate to the up position. 9

Original Stopper Moves the original stopper down to prevent an

original from being inserted.

43

Switches

Main Supplies power to the copier. 65

Upper Safety Cuts ac 100 volt power when the upper unit is

opened.

27

Lower Safety Cuts ac 100 volt power when the middle unit

is opened.

67

Rear Safety Cuts ac 100 volt power when the paper exit

unit is opened.

22

Toner Cover Cuts power to the toner supply solenoid when

the toner cartridge cover is opened.

45

Sheet Feeder

Set

Prevents main motor operation when the

sheet feeder is not set.

64

Rear Feeder Detects when the rear feeder table is opened. 21

Sensors

Image Density Detects the image density of the test pattern

on the drum.

33

Toner Density Detects the density of toner in the developer. 36

Toner Overflow Detects when the used toner tank is full. 28

Pulse Generator Supplies timing pulses to the main board(photointerruptor).

23

Original Set Detects when an original is inserted. 41

1st OriginalTransport

Monitors movement of the original. 11

2nd Original

Transport

Monitors movement of the original. 14

Original Regis-tration

Detects when the original lead edge passesthe original registration rollers.

12

Light Detects the intensity of the exposure lamp

output.

4

Original En-trance

Detects when an original is inserted from therear feeder.

13

ELECTRICAL COMPONENT DESCRIPTIONS 31 December 1992

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Switch Back

Gate

Detects if the switch back gate moves to the

up position during the original switch back.

10

Original Exit Detects jams in the original exit section. 39

Recycle Gate Detects whether the recycle gate is in the up

or down position.

30

1st Feed Detects when copy paper is inserted. 38

2nd Feed Detects jams between the manual feed rollersand the registration rollers.

37

Registration Detects when copy paper arrives at the

registration rollers.

35

Transport Monitors paper movement between thetransfer/separation section and the fusing unit.

71

Fusing Exit Detects jams through the exit unit. 17

Upper Exit Detects jams through the upper exit guides. 16

Lower Exit Detects jams through the lower exit guides. 18

Printed Circuit Boards

Main Controls all copier functions both directly and

through other PCBs.

63

DC Power

Supply

Provides dc power for all components of the

machine.

55

AC Controller 1 Provides ac power to the fusing lamp and triac. 57

Lamp Regulator Provides ac power to the fusing lamp. 51

AC Controller 2 Provides ac power to the main motor and

development motor.

60

Indicator Panel Contains the paper and original insertion

indicators and the original feed stop key.

42

Operation Panel Control the operation panel display. 32

Auto Image

Density

Measures the reflectivity from the original’s

background.

15

Lamps

Exposure Provides light to reflect the original’s image

onto the drum.

29

Quenching Neutralizes any charge remaining on the drum

surface after cleaning.

20


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Fusing Provides heat to the fusing unit. 53

Pre-Transfer

(PTL)

Reduces the charge on the drum surface prior

to image transfer.

31

Power Packs

Charge/Bias/Grid

Power Pack

Provides high voltage power for the charge

corona, charge grid, and development bias.

49

Transfer/

Separation

Provides high voltage power for the transfer

corona and separation.

54

Thermistors

Hot Roller Monitors the hot roller’s surface temperature. 56

Pressure Roller Monitors the pressure roller’s surface

temperature.

58

Exposure Lamp Monitors the fluorescent lamp’s temperature. 44

ThermofusesFusing Protects against fusing overheat. (Two

thermofuses in parallel.)

59

Exposure Lamp Protects against exposure lamp overheat. 44

Heaters

Exposure Lamp Warms the scanning lamp. 44

Anticondensa-tion

Keeps moisture from forming inside the copier. 47

Others

Total Counter Keeps track of the total length of copies made. 66

Noise Filter Filters electrical noise on the ac power inputlines.

62

Transformer Steps down the line voltage to 100 Vac. 69

DevelopmentMotor Capacitor

Motor start capacitor. 2

Main Motor Ca-

pacitor


Circuit Breaker Guards against voltage surges in the input

power.

61

ELECTRICAL COMPONENT DESCRIPTIONS 31 December 1992

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Vacuum Fan

Motor Capacitor



1-13

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7. ORIGINAL AND PAPER PATH

Repeating Copy Except for A0/E, A1/D Lengthwise

B

A

A: Upper Copy Exit

B: Lower Copy Exit

ORIGINAL AND PAPER PATH 31 December 1992

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A0/E, A1/D Lengthwise Switching Back

y z | : Switching Back

31 December 1992 ORIGINAL AND PAPER PATH

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SECTION 2

DETAILED SECTIONDESCRIPTIONS

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1. DRUM

1.1 DRUM CHARACTERISTICS

The organic photoconductor (OPC) drum has the following characteristics:• It is able to accept a high negative electrical charge in the dark. (The

electrical resistance of the OPC drum is high in the absence of light.)

• The electric charge on the drum surface dissipates when the drum is

exposed to light. (The conductivity of the OPC drum is greatly enhancedby exposure to light.)

• Dissipating an amount of charge in direct proportion to the intensity of the

light. That is, where stronger light is directed to the photoconductorsurface, a smaller voltage remains.

The OPC drum used in this model has high sensitivity, good colorreproduction, and good reproduction of low contrast originals (pencil

originals, etc.)

31 December 1992 DRUM

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1.2 DRUM DRIVE

The OPC drum [A] is 80 millimeters in diameter and 970 millimeters long. Itturns constantly when the main motor [B] is on.

When the main motor turns on, drive is transmitted to the drum as follows:

main motor drive gear [C] ⇒ idle gear [D] ⇒ main drive pulley gear [E] ⇒drum drive belt [F] ⇒ drum drive gear [G] ⇒ drum flange [H] ⇒ drum

When the drum knob [I] is tightened, the right flange [J] presses firmly againstthe drum so that the drum is held tightly between the flanges. The drum and

flanges turn together when the main motor is on.

[A]

[H]

[J]

[I]

[C]

[D]

[E]

[B]

[G]

[F]

DRUM 31 December 1992

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2. CHARGE

2.1 OVERVIEW

This model uses a single wire corona unit [A] to charge the OPC (organic

photoconductor) drum [B]. The corona wire generates a corona of negative

ions when a high negative voltage is applied to it by the charge/grid power

pack [P1].

To make the negative corona uniform, a grid consisting of 8 wires is installedon the charge corona unit between the corona wire and the drum. This grid

drains off any charge in excess of –940 volts, thus preventing fluctuation ofthe charge potential.

[B]

[A]

P1

Charge

Grid

P1

31 December 1992 CHARGE

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2.2 CHARGE CORONA CIRCUIT

The DC power supply board supplies +24 volts (Va) to the charge/bias/gridpower pack as the power supply source. About 8 seconds after the copy

process starts, the CPU drops CN107-B14 from +24 volts to 0 volt. This

actuates the dc/dc converter within the power pack which applies a high

negative voltage of approximately –5.3 kV to the charge corona wire. Thecorona wire then generates a negative corona charge.

The grid limits the maximum corona charge to –940 volts. This ensures that

the charge does not fluctuate and an even charge is applied to the drumsurface. When developing the test pattern for the image density sensor, the

grid charge is –460 volts.

The copy grid voltage, and ID sensor grid voltage amounts can be adjusted

using service program modes #23 and #22, respectively.

The grid drive signal applied to CN1-6 is a pulse width modulated signal. Asthe width of the pulses applied increases, the strength of the grid charge also

increases. The main board monitors the grid charge at CN110-8 and controls

the width of the drive pulses based on this feedback.

Charge / Bias Grid PPCN1-1

CN1-2

CN1-3

CN1-6

CN1-10

DC Power-6

-B14

CN110

-8

GND

DC/DCMain Board

Charge

-1

CN107

CN2

24V Va

Grid Drive0/5

Grid monitor

Converter

DC/DC

Converter

24

0 2.5

Charge/Bias/Grid PP

CHARGE 31 December 1992

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3. EXPOSURE

3.1 OVERVIEW

Light from the exposure lamp [A] reflects off the original and through the fiber

optics [B] to the OPC drum [C]. The reflector plate [D] aides the exposure

lamp intensity for high original moving speed. During exposure, the originalmoves across the exposure glass at the same speed as the drum’s

peripheral velocity.

The platen roller [E] presses the original [F] flat against the exposure glass[G] just above the fiber optic array. This ensures that the image is properly

focused. (The original must be within 0.2 mm of the exposure glass surface.)

The exposure lamp is a 100 V, 65 W fluorescent lamp. This lamp has aheater which prevents a reduction in light output due to low temperatures.

The heater maintains the lamp’s temperature at 40oC

[A]

[B]

[C]

[E]

[D]

[G]

[F]

31 December 1992 EXPOSURE

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3.2 ORIGINAL FEED

3.2.1 Basic Operation

When the original is inserted on the original table [A], it activates the original

set sensor [B]. The main motor then turns on. Two seconds later the original

feed clutch turns on to start turning the front original feed rollers [C], rearoriginal feed rollers [D], and original registration rollers [E]. The two second

delay allows time for the operator to align the lead edge of the original

against the first set of rollers to prevent skew.

The original is fed past the 1st and 2nd original transport sensor [F,G] and

around the rear original feed rollers to the original registration rollers. The

original feed clutch turns off 0.2 second after the original’s leading edgeactivates the original registration sensor [H]. The original remains at this

position until a sheet of copy paper is fed.

Just before the copy paper reaches the registration sensor, the original feedclutch turns on again and original feed resumes. The original passes

between the platen roller [I] and the exposure glass [J] and from there to thefront original feed rollers. The original’s image density is measured by the

ADS [K] at this time. The original’s image is reflected through the fiber opticarray to the drum as it passes between the platen roller and the exposure

glass.

If making a single copy, the original then exits the machine. However, ifmaking repeat copies, the recycle gate [L] directs the original around the front

original rollers to the upper part of the original transport mechanism. The

original transport cycle then repeats.

The maximum original length for repeat copying is 610 millimeters. If the

operator attempts repeat copying with an original longer than 610 millimeters,

it will automatically feed out after making a single copy.

[A]

[B] [C] [F] [I] [H] [G][D]

[E][K][J][L]

EXPOSURE 31 December 1992

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The main CPU determines the original length for synchro cutting by countingthe generated pulses after the 1st original transport sensor detects the

leading edge of the original until the original set sensor detects the trailing

edge of the original.

Switching-back

The inserted original activates both the original set [A] and original exit [B]

sensors when the lever [C] is lifted and the entered number of copies is twoor more. The copier CPU then detects that the switching-back mode has

been entered.

In the switching back mode, the original is exposured by passing between the

platen roller and exposure glass. At the appropriate timing after the trailing

edge of the original passes through the 1st original transport sensor [D], thefront original feed [E], platen [F], original registration [G], and rear original

feed [H] rollers turn backwards and the switch back gate [I] is lifted to the up

position. The original is transported to the machines rear side. At theappropriate timing after the trailing edge of the original passes through theregistration sensor, the front original feed, platen, original registration, and

rear original feed rollers begin turning forward again. The original is exposed

in the exposure section. The copier repeats the switching-back operation untilthe entered number of the copies have been made.

After all the copies are made, the original exits the machine.

The copies exit from the lower copy exit way in the switching-back mode

because the rear feeder table is opened.

If the operator attempts inserting an original longer than 610 mm without

lifting up the rear feeder table lever, the original will automatically feed outafter being scanned once only.

[A]

[B]

[C][F]

[I]

[H][G][D][E]


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3.2.2 Drive Mechanism

Drive power from the main motor is transmitted to the relay pulley [A]. When

the original forward feed clutch [B] is energized, the rear original feed rollershaft [C] starts turning the original drive belt 3 [D] forward through the original

drive belt 2[E]. The front original feed rollers, the rear original feed rollers,

and the original registration rollers rotate in the original forward direction.

When the original reverse feed clutch [F] is energized, the rear original feed

roller shaft starts turning the original drive belt 3 backwards from the relay

pulley through the intermediate gear [G], reverse gear [H], original reversefeed clutch shaft [I], and the original reverse drive belt 1 and 2 [J, K]. The

front original feed rollers, the rear original feed rollers, and the originalregistration rollers rotate in the original reverse direction.

[D]

[C]

[K]

[J]

[F]

[I]

[H]

[G]

[B][E]

[A]

[G]

[H] [A]

[F]

[I]

[J]

[E]

[K]

[B][D]

[C]


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3.3 ORIGINAL STOPPER MECHANISM

Originals should not be inserted during a copy cycle. To prevent originalsfrom being inserted, the machine locks the feeler of the original set detector

in the down position while copying. This is accomplished by the originalstopper solenoid [A].

When the original stopper solenoid turns on, the stopper arm [B] rotates

against the feeler of the original set sensor. This locks the feeler in the down

position so that originals can only be inserted as far as the original set sensor.

[A]

[B]


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3.4 EXPOSURE LAMP CONTROL

The lamp regulator receives 100 volts ac at CN1-1 and CN1-2. It alsoreceives +5 volts, which is used in the lamp regulator’s control circuit, from

the main board at CN2-1. The control signal, which is a pulse width

modulated (PWM) signal, is received at CN2-2. The PWM signal has a period

(T) of 1 millisecond and a duty of 15% to 100%.The basic light intensity level is determined either by the image density

selected from the operation panel (manual ID control) or by the original’s

background level as sensed by the ADS. The CPU uses the light sensor tomonitor the actual light intensity. The light sensor directly senses the lamp’s

light output and feeds a light intensity signal back to the main board. This

feedback allows the CPU to compensate for variations in light intensity due tothe lamp’s age or temperature.

[L1]CN3-1

CN3-2

CN3-4

CN3-5

CN1-1

CN1-2

CN2-1

CN2-2

+5V

PWM

Lamp OFF (+5V)

Lamp ON (GND)

T T = 1.0 ms

Duty = 15% to 100%

LAMP

REGULATOR

Exp. Lamp

[PCB4]

CN2-2


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3.5 MANUAL ID CONTROL VS ADS

Manual ID LevelLight Sensor

Output [V]Manual ID Level

Light SensorOutput [V]

1 0.74 14 1.21

2 0.80 15 1.253 0.81 16 1.29

4 0.82 17 1.33

5 0.84 18 1.37

6 0.86 19 1.41

7 0.90 20 1.45

8 0.94 21 1.50

9 0.99 22 1.54

10 1.05 23 1.59

11 1.10 24 1.64

12 1.15 25 1.69

13 1.18 26 1.74

3.5.1 Manual ID ControlWhen in manual image density mode, the user can select one of 26 manual

ID levels. For each level, the intensity of the light output by the exposurelamp (as measured by the light sensor) is fixed. This is shown in the abovetable. For manual ID levels 2 through 12, the development roller bias also

varies. (See the section on development bias.)


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3.5.2 ADS Control

Vod/Vsd VS [V] Vod/Vsd VS [V]

0 ~ 0.18 1.74 0.66 ~ 0.69 1.21

0.19 ~ 0.46 1.74 0.70 ~ 0.73 1.15

0.47 ~ 0.49 1.64 0.74 ~ 0.75 1.050.50 ~ 0.53 1.54 0.76 ~ 0.80 1.05

0.54 ~ 0.57 1.45 0.81 ~ 0.88 0.94

0.58 ~ 0.61 1.37 0.89 ~ 0.86

0.62 ~ 0.65 1.29

VS: Light Sensor Voltage

VOD: Original Density Detecting Voltage

VSD: Standard Pattern (White Plate) Density Detecting Voltage

When automatic image density sensing (ADS) is used, the exposure light

intensity varies depending on the background image density of the original.

The preceding table shows how the exposure light intensity changesdepending on the VOD/VSD ratio.

Use service program mode #10 to select the default ID setting. It can be set

to ADS or Manual ID level 7. The factory setting is ADS.NOTE: If the exposure lamp cannot output sufficient light, service call

condition "Exposure Lamp Abnormal" appears. However, copying is

still possible. Refer to the "SERVICE CALL CONDITIONS" table.


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3.6 AUTO DENSITY SENSOR (ADS)

The ADS [A] measures the reflectivity of the original’s background. Based onthe originals background image density, the CPU automatically adjusts the

development bias and exposure light intensity to achieve a good copy image.The ADS is located at the original registration rollers. It reads the reflectivityof the white plate [B] by emitting light from ADS (standard white), which is

located above the ADS, prior to the arrival of the original. This standard white

level (VSD) is used for comparison with the background level of the original

(VOD).

The ADS samples a 43.5 mm by 10 mm area near the leading edge of the

original. As shown in the above illustration, sampling starts 15 mm from the

leading edge.

The highest voltage detected by the ADS is held (peak hold) and used for the

exposure voltage adjustment.

33.5 mm

10mm

Center Line

Sampled Area

18 mm

20 mm

[A]

[B]

[B]

[A]


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3.6.1 ADS Circuit

The ADS circuit is powered by +5 volts, which is provided at CN401-1 for the

detection circuit and CN401-6 for the lamp. The CPU resets the ADS by

dropping CN401-4 to 0 volt. This discharges C403 to reset the peak hold

function. The resistance of PD401 varies with the strength of the light strikingit. The two op-amps amplify the effect of the change in PD401 and output the

ADS signal at CN401-3.

CN401-2 C-GND

R404

C404

IC401

D4016

5 7

C403

R403

2

3

8

1IC401

4

R401

R402

C402

C401

LAMP401

PD-401

Vcc(+5V)

CN401-3 ADS:OUT

CN401-5

CN401-4

Vcc(+5V)CN401-6

CN401-7 SENSOR LAMP

ADS ADJUST

ADS RESET

CN401-1


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3.7 LAMP HEATER

This copier uses a fluorescent lamp [A] as the exposure light source. Theoutput of the exposure lamp varies depending on the temperature; low

temperatures especially degrade the light output. To prevent fluctuations intemperature from affecting the copy image, the lamp heater [B] keeps the

lamp’s temperature at 40°C.

[A]

[B]


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3.8 LAMP HEATER CONTROL CIRCUIT

The lamp thermistor, which is mounted together with the lamp heater,monitors the lamp temperature. Based on the input from this thermistor at

CN107-B1, the CPU on the main board determines whether or not to turn onthe lamp heater. To turn on the lamp heater, the main PCB drops CN107-B2

to 0 volts. This turns on SSR401 on ac controller 2, which provides ac powerto the heater.

If the exposure lamp thermistor short circuits, the comparator circuit drops

CN107-B3 to LOW. The copier then stops operation, the Call ServiceIndicator (wrench mark) lights, and "E8" are alternately displayed in the Copy

Counter.

If the exposure lamp thermistor circuit becomes open, the comparator circuitchanges CN107-B4 from LOW to a 5 volt pulses. Then, service call condition

"Exposure Lamp Thermistor Open" appears. However, copying is still

possible. Refer to the "SERVICE CALL" Table.

CN107

-A2

-B2

-A1

-B3

-A3

-B1

-B4

CN407-2

-1

CN408

-3

-2

-1

-5

-4

Va

24

24SSR401

~

~+

AC 100 V

CN406-1

CN406-2

CN407-4

CN407-3TH3

H1

Comparator

Circuit

L. Heater ON

00/5

00/5

TH3Short

TH3Control

TH3Open

5Vc

GND

PCB1 PCB5CN401-2 -1

0/50

TF2

Main PCB AC Controller 2


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4. DEVELOPMENT

4.1 OVERVIEW

When the development motor turns on, the paddle roller [A] and development

roller [B] start turning. The paddle roller picks up developer in its paddles and

transports it to the development roller. Internal magnets in the developmentroller attract the developer to the development roller sleeve.

The turning sleeve of the development roller then carries the developer pastthe doctor blade [C]. The doctor blade trims the developer to the desired

thickness and creates backspill to the cross-mixing mechanism.

The development roller continues to turn, carrying the developer to the OPCdrum. When the developer brush contacts the drum surface, the negatively

charged areas of the drum surface attracts and holds the positively charged

toner. In this way, the latent image is developed.

Negative bias is applied to the development roller to prevent toner from beingattracted to non-image areas on the drum that may have residual positive

charge. The bias also controls image density.

After turning about 100 degrees more, the development roller releases the

developer into the developer tank. The developer is agitated by the paddle

roller and the cross-mixing mechanism.

Also, in this machine, rotation of the paddle roller and development roller tend

to cause air pressure inside the unit to become higher than the air pressurearound the development unit. Therefore, a hole fitted with a filter, has beenadded to the top of the unit to relieve air pressure and to minimize toner

scattering.

The toner density sensor [D] is mounted on the upper side of thedevelopment unit to detect the density of toner in the developer.

[C]

[A]

[B]

[D]

31 December 1992 DEVELOPMENT

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4.2 DRIVE MECHANISM

To reduce load on the main motor, the development unit uses a separatedrive motor [A]. The development drive pulley turns the development drive

belt [B] which turns the development drive gear [C]. The development drive

gear turns the development roller gear [D] and the paddle roller gear [E]. The

auger gear [F] is engaged with the paddle roller gear. Thus, the developmentroller, paddle roller, and auger all turn when the development drive motor is

on.

The toner agitator gear [H] is also turned by an idle gear [G], which is

engaged with the auger gear. However the toner agitator does not turnunless the toner supply clutch [I] is engaged. It engages when the toner

supply solenoid turns on.

[F] [G][H] [I]

[E]

[A]

[B][C]

[D]

DEVELOPMENT 31 December 1992

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4.3 CROSS MIXING

"Crossmixing" keeps the toner and carrier evenly mixed in the developer andevenly distributes the developer within the development unit. Crossmixing

also agitates the developer to generate the necessary triboelectric charge onthe toner and carrier particles.

The arrows in the above illustration show the developer movement directions

within the machine. The developer that is attracted to the development roller

[A] is split into two parts by the doctor blade [B]. One part (the magnetic

brush) goes on to develop the latent image on the drum. However, the otherpart is trimmed off by the doctor blade and directed to the backspill plate [C].

As the developer slides down the backspill plate to the paddle roller [D], part

of the developer falls into the auger inlets [E] and is transported to the leftside of the unit by the mixing auger [F], where it drops onto the paddle roller.

As the paddle roller rotates, its blades move the developer to the right. The

amount of developer moved to the right by the paddle roller is equal to the

amount moved to the left by the mixing auger.

[C]

[E] [F]

[A]

[D]

[B]


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4.4 TONER DENSITY CONTROL

The flow chart above illustrates how the copier determines whether or not toadd toner.

This copier uses a dual sensor system to control toner density. The primary

sensor is the ID sensor (image density sensor) which is installed on thepick-off pawl unit. This sensor is a photosensor and directly measures the

density of a test pattern on the drum. The test pattern is made by the pattern

plate interrupting the light path. This is done just before making the copy

when the main switch is turned on, and just before making the copy every

1220 mm. If the test pattern image density is too low, toner is added.

The secondary sensor is the toner sensor. It measures the ratio of toner to

carrier in the developer. This sensor is used only if the output of the IDsensor is abnormal or the original is longer than 1200 millimeters. (For very

long originals, it is possible for the toner density to change while the copy is

being made.)

ID Sensor

Check

Toner Sensor

Check

ID sensor

normal?

Toner

sensor

Tonerdensitylow?

Toner supply

solenoid ON

Toner supply

solenoid ON

Originallonger than1220 mm?

Service Call

indicator ON

Yes

No

No

Yes

No

Yes

No

YesAbnormal

Toner densitysensor

Low, Normal

Toner

density sensor

low?

Abnormal,High

Low, Normal, High

density


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4.4.1 Image Density Sensor

Toner density is detected by develop-ing the sensor pattern and by check-

ing its reflectivity with the image

density sensor (photosensor). Light

from the sensor’s LED reflects from

the drum and activates the phototran-

sistor. The output of the phototransis-

tor goes to CN102-12 of the main

board.An average reference voltage (Vsg) is

calculated from eight samples of bare

drum reflectivity. After that, an aver-

age voltage is calculated from eightsamples of sensor pattern reflectivity.

These two values are then compared

to determine whether toner should be

added or not as follows.

No toner supply condition: Vsp/Vsg < 0.125

Toner supply condition: Vsp/Vsg > 0.125

The ID sensor checks toner density every 1220 mm. If Vsp/Vsg becomes

greater than 0.125 (1/8), then it starts checking toner density every 610 mm.

Toner is

No toner

VSP

0

Thres-holdLevel

VSG

is supplied.

supplied

LED Light Intensity

Weak Strong

0.5

1.0

2.0

3.0

4.0

5.0

Voltage(V)

Standard Intensity

4.0 0.2V+_

SOL 1

CPU

ID Sensor [S2]

Main PCB [PCB1]

5

3

2

1

+5V +24 V

CN104-B10

CN102-14

-12

-15


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(If service program mode #21 is set to "1", the toner density will be checked

every 610 mm regardless of Vsp/Vsg.)

The toner supply amount (%) can be adjusted using service program mode

#17.

Using service program #34, Vsp, Vsg, and Vsp/Vsg can be displayed in the

copy counter.


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4.4.2 Toner Density Sensor

The toner density sensor works in conjunction with the ID sensor to control

the amount of toner in the developer mixture. It has three basic functions.

First, it controls the toner supply in case the toner density is greater than theupper limit and the toner density is less than the lower limit. It does not matter

what the ID sensor input is. If the amount of toner in the developer is greater

than the upper limit (in this case, the toner density sensor value, Vts, is less

than 2.4 V), toner supply is prohibited. Second, it checks toner density if an

original larger than 1220 mm is copied. Third, it takes over toner densitycontrol completely if the ID sensor becomes abnormal (=Vsp > 2.5 V or Vsg <

2.5 V).

The toner density sensor is powered by 24 volts from CN101-1 of the main

board. The sensor’s sensitivity is set by the control signal applied from

CN101-3. The input signal from the sensor is applied to CN101-2. This is ananalog signal. When the toner density is at the standard level, the analog

signal is approximately 2.1 volts.

Toner Density Sensor (S2) Main Board (PCB1)

Control

Circuit

1

2

3

4

CN101-1

-2

-3

-4

[24V] Va

GND

Coils

[7.0V] (Control)

Toner Density Sensor


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The active sensing element is a very small transformer with three coils. Wheniron ferrite (carrier) is near the sensing element, the inductance of the coils

changes, causing the current through the transformer to change. As the

amount of toner in the developer increases, the effect of the carrier particles

decreases and the voltage applied to CN101-2 decreases. Conversely, whenthe toner concentration drops due to use, the effect of the carrier on the

sensor coils increases and the voltage at CN101-2 also increases.

Service call "Ed" lights if the toner sensor output becomes less than 1.6 V or

more than 4.7 V.

Toner Density Sensor Output(= Vts) Toner Density Condition

Vts ≥4.7 Abnormal Service Call "Ed"

4.7 > Vts > 3.8Low

Toner density sensor control(Toner is supplied.)

3.8 ≥ Vts ≥ 2.4 Normal ID sensor control

2.4 > Vts > 1.6 High Toner density sensor control(No toner supply)

1.6 ≥ Vts Abnormal Service Call "Ed"

Upper limit 2.4 V

Lower limit 3.8 V

Toner End Condition

When the main PCB senses that Vsp/Vsg is 0.225 or more ten times in a row

under 2.4 ≤ Vts < 4.7 conditions, the toner near end condition is detected andthe add toner indicator start flashing.

When in the toner near end condition, 5.49 meters (=610 mm x 9) can be

copied. After that, the toner end condition is reached. The Add Tonerindicator will light and the machine will not operate.


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4.5 DEVELOPMENT BIAS

4.5.1 Basic ConceptWhen the drum is exposed, most of the negative charge is eliminated from

the areas where light strikes the drum. This leaves a negative charge patterncorresponding to the dark areas of the original. After exposure however, a

small residual charge of about –100 volts (for white paper) remains in theexposed areas. This residual charge could attract positively charged toner

from the development roller and result in dirty background on the copy.

The development bias prevents such dirty background. A negative bias a

little larger than the residual charge is applied to the development roller. This

prevents the positively charged toner from being attracted to the background

areas of the latent image.

4.5.2 Manual Image Density BiasWhen in manual image density mode, the development bias is applied as

shown by the above chart.

In addition to the development bias, the image density is also controlled by

varying the exposure light intensity. (See the exposure section.)

-120

-160

-180

-200

-240

-280

11 12 - 261 2 3 4 5 6 7 8 9 10

-260

-220

-140

-190

-170

Manual ID Setting

Bias

(Volts)

Manual ID Bias


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4.5.3 Auto Image Density BiasThe above chart shows the development bias when in ADS mode. The ADScan be switched to the "Darker" setting with service program mode #20.

In addition to the development bias, the image density is also controlled byvarying the exposure light intensity. (See the exposure section.)

4.5.4 Bias Adjustment

Using service program mode #19, the bias level can be increased ordecreased as shown in the above chart.

-280

-240

-200

-180

NormalADS

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

-180

-260

-220

-160

DarkerADS

ADS Vod/Vsd

Vod: Original Density Detecting Voltage (ADS out put voltage)

Vsd: Standard Pattern (White Plate) Density Detecting Voltage

0.88

0.80

LighterADS

-300

-260

-220

-200

0.75

Program Mode #19

1 2 3 40

BiasAdjustment

(Volts)

+20

0

-20

+40

-40


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4.6 IMAGE DENSITY SENSOR BIAS

The ID sensor bias is similar to the development bias; however, it is appliedonly when developing the ID sensor pattern.

Basically, the ID sensor bias is fixed. The normal ID bias level is –200 volts,but it can be changed using service program #18. The following table showsthe possible settings. You should clearly understand the effect of changing

the ID sensor bias. If the ID sensor bias is increased the sensor pattern will

become lighter. This will cause more toner to be added to the developer andthus copy images will become darker and toner consumption will increase. If

the ID sensor bias is decreased, lighter images and less toner consumption

will result.

Service Program #18Setting 0 1 2 3 4

ID Bias –200 –180 –240 –280 –320

Factory Setting

A developer counter correction is applied to the ID sensor bias tocompensate for changes in the triboelectric properties of the developer as a

new developer mixture is broken in. The following table shows this correction.

Notice that the correction depends on the average Vsp/Vsg ratio asmeasured during initial conditioning as well as on the developer counter. Byfactoring in the initial conditioning Vsp/Vsg ratio, this correction compensates

for slight variations between different lots of developer as well as for changes

in the developer during the break-in period. After the initial conditioning, the

copy counter will display the density level (dL).

Developer Counter Correction

dLInitial ConditioningVsp/Vsg (%)

Developer Counter (A3 lengthwise = 420 mm)0–499 Copies 500–999 Copies More than 1000

1 0–10 –40 V –20 V 0 V

2 10–15 –20 V 0 V 0 V

0 15–20 0 V 0 V 0 V

3 20–25 +20 V +20 V +20 V

4 >25 +40 V +40 V +40 V

NOTE: Perform the initial conditioning by SP#5 whenever the developermixture is replaced. As the developer counter returns to 0 at this

time, do not perform SP#5 when the drum is replaced. There is a

possibility of dLE being displayed. This means that there was on ID

sensor (Photo sensor) error during the initial conditioning. (dLE:

Vsp/Vsg > 50%, dLP: Vsp > 2.5 < Vsg)


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4.7 TONER SUPPLY

To allow a compact design, the toner supply mechanism is built into the tonercartridge. An agitator [A] in the toner cartridge turns when the toner supply

solenoid is on (toner supply spring clutch engaged). As the agitator rotates,

mylar strips [B] on the ends of the agitator force toner through small holes

(0.5 mm) in a plastic strip [C] along one side of the toner cartridge. The tonerparticles thus ejected from the cartridge fall into the development unit and are

mixed into the developer. The toner agitator turns at 120 rpm and the toner

supply rate is approximately 36 grams per minute.

When supplying toner, the CPU turns on the toner supply solenoid the length

of time required to supply the amount of toner specified by service program

#17.

[C]

[A]

[B]

[B]


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5. IMAGE TRANSFER AND PAPERSEPARATION

5.1 PRE-TRANSFER LAMP (PTL)After the latent image is developed but before the image is transferred to the

copy paper, the drum surface is illuminated by the pre-transfer lamp [A]. This

illumination reduces the negative potential on the drum surface. This

prevents the toner particles from being re-attracted to the negatively chargeddrum during the paper separation process. It also makes image transfer and

paper separation easier.

5.2 IMAGE TRANSFERThe registration rollers [B] feed the copy paper through the transfer entranceguides to the transfer section. A high negative voltage (about –5.0 kV) is

applied to the transfer corona wire [C], and the corona wire generates

negative ions. These negative ions are applied to the copy paper, and the

negative charge attracts the positive charged toner away from the drum and

onto the paper. In addition, the paper is held against the drum by the positivecounter charge on the drum.

5.3 PAPER SEPARATIONAfter image transfer, the copy must be separated from the drum. To break

the attraction between the paper and the drum, the separation corona wires[D] apply an ac corona (4.0 kV) to the reverse side of the paper. The stiffness

and weight of the paper causes it to separate from the drum.

The separation corona has a negative component of approximately –200volts. This negative component holds the toner on the paper to prevent it

from being reattracted to the drum during paper separation. The two pick-off

pawls [E] ensure that thin paper, paper with low stiffness, or upward curledpaper separates completely from the drum.

[A]

[B] [C] [D]

[E]

31 December 1992 IMAGE TRANSFER AND PAPER SEPARATION

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5.4 PICK-OFF MECHANISM

The pick-off pawl solenoid [A] is energized 12 pulses after the registrationclutch turns on to feed the copy paper to the drum. The pick-off lever [B] then

rotates clockwise and pushes up the pawl holder [C]. This releases the two

pick-off pawls [D], allowing them to rotate against the drum.

Just after the leading edge of the copy paper passes the transport sensor,

the pick-off solenoid turns off again. The pick-off spring [E] then pushes down

the pawl holder, which moves the pick-off pawls away from the drum.

[A]

[B]

[C][D]

[E]

IMAGE TRANSFER AND PAPER SEPARATION 31 December 1992

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5.5 T/S CORONA CIRCUIT

The T/S power pack is powered by +24 volts (Va) from the dc power supply.The dc/dc converters and dc/ac inverter change the +24 volts to the high

voltages used by the transfer and separation coronas.

The main board turns on the transfer corona by dropping CN107-B12 (T.Trig)

from 24 volts to 0 volt. This turns on the dc/dc converter, which applies a highvoltage of approximately –5.0 kV to the transfer corona wire. The main board

turns on the separation corona by dropping CN107-B13 (S.Trig) to 0 volt. The

dc/dc converter and dc/ac inverter circuits then apply approximately ac 4.0kV and –200 V to the separation corona wires.

Normally, T.Sel is not used. However, if the user presses the Auto ImageDensity key for longer than 3 seconds, the CPU uses both T.Trig and T.Sel to

turn on the transfer corona. This increases the transfer corona current from

120 µA (the normal value) to 250 µA. The higher transfer current may be

useful under high humidity conditions (When the higher transfer coronacurrent is selected, the manual ID display function inverts.)

-5.0 kV

AC 4.0 kV

CN1-2

+24 (Va)

DC/DCConverter

DC/ACInverter

DC/DCConverter

-6 -B11

-5 -B13

-4 -A13

-3 -B1224

5

24

T. Trig

T. Sel

S. Trig

(Not Used)

CN107CN1

CN1-1

A. GND

DC -200 V

Main Board

S. Sel

Transfer/Separation

Power pack

5

T

S

31 December 1992 IMAGE TRANSFER AND PAPER SEPARATION

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6. CLEANING

6.1 OVERVIEW

The cleaning blade [A] removes any toner remaining on the drum after the

image is transferred to the copy paper. The toner that is wiped off by the

cleaning blade drops onto the toner collection coil [B], which then moves it tothe used toner tank.

The cleaning blade pressure spring applies pressure to the exact center of

the cleaning blade so that pressure is evenly applied across the entire lengthof the cleaning blade. Blade pressure is applied constantly; however, the

blade pressure can be relieved manually for drum removal.

[A]

[B]

CLEANING 31 December 1992

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6.2 COLLECTION OF USED TONER

The toner collection coil moves used toner from the cleaning unit through theused toner pipe [A] to the used toner tank [B]. The used toner tank can hold

about 800 grams of toner. On average, about 10,000 A2 sized copies can be

made before the used toner tank needs to be emptied. (This assumes 7%

originals and 80% transfer efficiency.) The toner overflow sensor [C] detectswhen the used toner tank is full.

The toner collection bottle is vibrated to prevent used toner from building up

in one place and activating the toner overflow sensor too early. The shaft of

the first set of transport rollers has a cam [D] on the end. This cam is incontact with a projection [E] of the used toner bottle. It turns when the main

motor is on and moves the used toner tank up and down as shown above

right.

[A] [C]

[B]

[E]

[D]

31 December 1992 CLEANING

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6.3 TONER OVERFLOW SENSOR

The toner overflow sensor [A] signals the CPU when the toner collectionbottle is full.

A small tuning fork [B] is used as the sensing element of the toner overflow

sensor. This tuning fork is a damping element in a multivibrator circuit. Aslong as there is nothing in contact with the tuning fork, the vibrating frequency

of the circuit stays low and the transistor stays off.

When toner presses against the tuning fork, the resistance of thepiezoelectric elements that are in contact with the tuning fork changes and

the vibrating frequency increases. The frequency detection circuit passes the

higher frequency signal to the rectifier which activates the switching

transistor. The transistor sends a LOW signal to CN107-B22.

When the CPU detects this LOW signal, it stops the copier and lights the

Toner Collection Bottle indicator.

[B]

[A]

+5 (Vc)

OSC

Freq.Detec- Rectifier

Tr.CN107-B22

Toner Overflow Sensor Main Board

tion

0/5 0

1

2

3


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7. QUENCHING

After the drum is cleaned by the cleaning blade, light from the quenching

lamp neutralizes any charge remaining on the drum. The quenching lampturns on and off at the same time as the main motor.

The quenching lamp consists of two PCBs containing 49 LEDs (light emitting

diodes) each. The LEDs output light in the 660 nm to 700 nm (red) range.The main board turns on the quenching lamp LEDs by dropping CN104-B8

and CN104-B9 to 0 volts. The two PCBs have identical circuits (shown

above).

[A]

[B]

24

Main Board

+24 V

Quenching Lamp

CN104

-B8

(-B9)

31 December 1992 QUENCHING

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8. PAPER FEED AND REGISTRATION

8.1 OVERVIEW

In this copier, paper is fed either manually [A], or by the sheet feeder [B]

(option), or roll feeder [C] (option).

For manual feed, the copy paper is inserted until it contacts the manual feed

rollers [D]. At that time the paper turns on the 1st feed sensor [E], which

causes the main motor to turn on. Two seconds after the main motor turnson, the manual feed solenoid turns on and the manual feed rollers start

turning to feed the paper to the registration rollers [F]. If using the auto sheet

feeder or roll feeder, copy paper feeds through the manual feed rollers

automatically after the original is inserted.

Just before the paper reaches the registration rollers it activates the

registration sensor [G]. The manual feed solenoid turns off 0.4 second after

that. The 0.4 second delay allows the leading edge of the paper to alignagainst the registration rollers (which are not turning at this time) to eliminate

skew.

The registration clutch turns on to feed the paper to the drum. It is energizedat the proper time to align the leading edge of the paper with the leading

edge of the developed image on the drum.

Fine and rough registration adjustments can be made using service program

modes #26 and #27 respectively.

[A]

[B]

[C]

[E] [D] [G] [F]

PAPER FEED AND REGISTRATION 31 December 1992

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8.2 DRIVE MECHANISM

Drive power from the main motor is provided to the paper feed andregistration drive mechanism from feed/fusing drive belt 2 [A] through the

manual feed/registration sprocket [B].

When the manual feed solenoid [C] is energized, the paper feed drive chain

[D] drives the manual feed roller [E]. Once the paper reaches the registrationsensor, the registration clutch [F] turns on, and the registration roller [G]

starts turning.

The manual feed/registration sprocket is in contact with the transport/fusing

sprocket [H] which drives the transport and fusing units.

[A]

[B]

[C]

[D]

[E]

[F]

[G]

[H]

31 December 1992 PAPER FEED AND REGISTRATION

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9. PAPER TRANSPORT

After separation from the drum, the copy paper rides on the transport belts

[A] and transport rollers [B] to the fusing unit.

Airflow directly from the vacuum fan [C] holds the paper firmly against the

belts so that there is enough friction between the paper and the belts for

smooth transportation of the paper. The transport belts and transport rollers

are directly driven by the fusing drive chain (no clutch or solenoid); so, theyturn constantly when the main motor is on.

[A]

[B]

[C]

[A]

[B] [C]

PAPER TRANSPORT 31 December 1992

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10. FUSING AND PAPER EXIT

10.1 OVERVIEW

Two rollers fuse the image to the copy paper by applying heat and pressure.The hot roller [A] is made of carbon-teflon and the pressure roller [B] is made

of silicone rubber. Pressure is constantly applied by the pressure levers at

the ends of the fusing unit.

The fusing lamp [C], which is located at the hot roller axis, turns on and off to

maintain the operating temperature. The temperature control circuit (on themain board) monitors the surface temperature of the hot roller and the

pressure roller through thermistors [D and E respectively].

There are three operating temperature settings: normal, high, and low.

[A]

[B]

[C]

[D]

[E]

[F]

[G]

[H]

[I]

[J]

[K]

[L]

[M]

[N]

31 December 1992 FUSING AND PAPER EXIT

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The hot roller strippers [F] separate the copy from the hot roller and direct itto the fusing exit rollers [G]. After the fusing exit rollers, the exit gate [H]

directs the copy to either the upper rollers [I] or lower exit [J].

When the exit gate solenoid is on, the exit gate directs the copy paper down

through the lower copy exit path. If the exit gate solenoid is off, the papergoes through the upper copy exit path. The exit direction is selected using

the Copy Exit Way key.

Two thermofuses (wired parallel) [K] provide backup overheat protection.

(See the section on fusing temperature control.)

The fusing exit, upper exit, and lower exit sensors [L, M, N] are used for jam

detector.

FUSING AND PAPER EXIT 31 December 1992

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10.2 DRIVE MECHANISM

10.2.1 Fusing Drive

The hot roller is turned by the fusing drive chain as shown. The pressure

roller is friction driven by the hot roller. The fusing rollers turn constantly when

the main motor [A] is on, driven via the gears [B], through feed/fusing drivebelts 1 [C] and 2 [D], the sprockets [E] and the fusing drive chain [F], to the

hot roller sprocket [G].

[A]

[B]

[C]

[D]

[E]

[F]

[G]


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10.2.2 Exit Roller Drive

The upper [A] and lower [B] exit rollers are driven by the main motor [C] via a

set of gears [D]. Finally, the exit roller drive chain [E] drives the exit rollers

through a sprocket as shown above.

The exit rollers turn constantly when the main motor is on.

[A]

[B]

[C]

[D]

[E]


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10.3 FUSING TEMPERATURE CONTROL

10.3.1 Fusing Circuit OperationThe fusing lamp is powered by AC controller 1 and controlled by the main

board.

AC controller 1 receives direct wall voltage ac power (not stepped down) at

T304 and T306. It also receives +24 volts at CN301-5. The ac power isapplied to the drive circuit, the fusing lamp (L3), and the triac (TR). The dc

power drives PC301 and RA301.

To turn on the fusing lamp, the main board drops CN107-A15 to LOW. Thisactivates the photocoupler (PC301) which in turn energizes the drive circuit.

The drive circuit turns on the triac to complete the lamp circuit, thus turning

on the lamp.

RA301 guards against a failure of the +24 volt power supply. When +24 volts

is applied at CN301-5, RA301 is energized and its ac contacts stay open. If

the +24 volts power stops, the ac contacts of RA301 close, stopping the drive

circuit and turning off the fusing lamp (U.S.A. version only).

Overheat Protection

+

+24 +24

Q101

IC1071K

1.3K

6

5

7

CN107-A25

-5

CN107-A15

CN107-B25

CN301

A.GND

-6

-3

Drive Circuit

RA301

PC301

AC115,220,240

AC Controller 1T304 T306

TR

G

T309 T310 T308 T307 T305

CN110-12

CN110-11

CN110-9

CN110-10

TH2

TH1

L3

+5

CP

U

TF1

24

RA301

_

+5

RA301: U.S.A. version only


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10.3.2 Overheat ProtectionThe overheat protection circuit on the main board turns off the fusing lamp if

the temperature goes too high.

The input from TH1 goes to pin 5 of IC107 as well as to the CPU. As the

temperature of TH1 increases, its resistance decreases and therefore thevoltage at pin 5 of IC107 increases. If this voltage becomes greater than the

voltage at pin 6, the output at pin 7 becomes HIGH. Q101 then turns off and

cuts the +24 volt supply to ac controller 2. The fusing lamp then turns off. Theoverheat protection circuit becomes effective at about 220 degrees.

TF1 (2 thermofuses in parallel) provides overheat protection in case a shortbypasses the control and drive circuits. These two fuses will open if they

reach approximately 192 degrees.


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10.4 TEMPERATURE CONTROL

The main board monitors the temperature of the hot roller through TH1 andthe temperature of the pressure roller through TH2. The CPU determines

whether or not to turn on the fusing lamp based on the combination of the

input from these two thermistors. If the pressure roller is cool, the CPU keeps

the hot roller temperature high. However, if the pressure roller is hot, the CPUdecreases the operating temperature of the hot roller. The above graph

shows the relationship between the temperatures of the hot and pressure

rollers.

The operating temperature of the hot roller and pressure roller can be

adjusted using service programs #28 and #29. These programs are used to

compensate for variations in the response of different thermistors. Serviceprogram #28 adjusts the hot roller temperature and service program #29

adjusts the pressure roller temperature. Service program #28 shifts thetemperature in 1 degree increments (–4°C to +5°C). Service progtam #29

shifts the temperature in 2 degree increments (–8°C to +10°C). The fusingtemperature can be monitored using service program #32.

LOW

HIGH

NORMAL

75 80 120115110105100959085

200

155

195

190

185

180

175

170

165

160

Hot Roller

Temp. (°C)

Operating

temp. (Low)

Lower Limit(Low)

Pressure Roller Temp. (°C)


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The ready condition

When the hot roller temperature reaches the ready temperature, the copier

goes in to ready condition. Copying is possible. The ready temperature is any

where between 3° lower than the hot roller operating temperature.

When the mode of the fusing temperature is changed using the Fusing

Temperature key on the copier operation panel, the hot roller and pressure

roller start to rotate to change to the appropriate operating temperature.

Lower limit temperature

High mode: If the hot roller or pressure roller temperatures drop below the

ready condition temperature while copying, the copier stops and the fusing

lamp turns on until the temperatures return to the range of high mode. The

original will automatically feed out (normal mode).By changing SP mode #96, this limitation can be canceled. However, poor

fusing or a waved copy may occurs (forced copy mode).

Also, by changing SP mode #96, another program can be selected so that

the original stops in the original path and the copier automatically resumesthe copy run after the temperature returns to the high mode range (auto start

mode).

Low mode: Even if the hot roller temperature drops below the ready conditionof the low mode while copying, the copier dose not stop until the hot roller

temperature drops below the lowest temperature limit.


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11. OTHERS

11.1 PULSE GENERATOR

The CPU controls the timing of all machine operations based on the number

of pulses it receives from the pulse generator. Pulses are generated by

rotating a disk with slots in it within a photointerruptor. As the disk rotates,

light from the LED activates the phototransistor each time a notch comes

between them. The pulse interval is 3.125 milliseconds.

If no pulses are received for one second during the copy cycle, the machine

will stop and display "Eb" in the copy counter.

[S4]

Main Board [PCB1]

CPU

+5V

CN112-1

CN112-3

CN112-2

31 December 1992 OTHERS

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11.2 OPERATION PANEL

The above illustration shows the copier’s operation panel circuit in block form.

The operation panel circuit is driven by six scan pulse lines. The copier uses

LEDs for display elements. To light any particular LED, the CPU drops theappropriate segment line to 0 volt at the same time that the scan lineconnected to the LED is being energized.

The CPU monitors the KEY lines (KEY1 to KEY3) to determine if a key has

been pressed. Each KEY line is used to monitor up to five keys on theoperation panel. A specific scan pulse appears at the appropriate KEY line

when a key on the operation panel is pressed.

CN106

-B15

-B16

-A16

-B7

-B6

-B5

-B4

-B3

-B2

-B1

-A1

CN202 -1 -2 -3 -4 -5 -6 -7 -9-8 -10 -11

CN106 CN201

-A11Scan1-1

-A13Scan2

-2

-B11Scan3

-3

-B13Scan4

-4

-A12Scan5

-5

Key

Matrix LED Matrix

MAIN BOARD OPERATION PANEL

Key 1

Key 2

Key 3Seg a

Seg b

Seg c

Seg d

Seg e

Seg f

Seg g

Seg h

seg b 2

seg c 2

seg d 2

seg e 2

seg f 2

seg g 2

seg h 2

seg a 2

-1 -2 -3 -4 -5 -6 -7 -8

-A2

-A3

-A4

-A5

-A7

-A8-B8

-A15

-6Scan6

OTHERS 31 December 1992

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SECTION 3

INSTALLATION

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1. ENVIRONMENT

1. Temperature Range: 10oC to 30oC (50oF to 86oF)

2. Humidity Range: 15% to 90% RH3. Ambient Illumination: Less than 1,500 Lux (do not expose

to direct sunlight).

4. Ventilation: Minimum space 20 m3

Room air should turn over at least

30 m3/hr/person.

5. Ambient Dust: Less than 0.15 mg/m3

(4 x 10-3 oz/yd3)

6. If the installation place is air-conditioned or heated, place the machine as

follows:

a) Where it will not be subjected to sudden temperature changes

from low to high, or vice versa.

b) Where it will not be directly exposed to cool air from an air

conditioner in the summer.

c) Where it will be directly exposed to reflected heat from a space

heater in the winter.

7. Avoid placing the machine in an area filled with corrosive gases.

8. Avoid any area higher than 2,000 m (6,500 ft) above sea level.

9. Place the machine on a strong and level base.

10. Avoid any area where the machine may be subjected to frequent strong

vibration.

31 December 1992 ENVIRONMENT

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1.1 MINIMUM SPACE REQUIREMENTS

1. Front: 1,000 mm (39.5 in)

2. Back: 600 mm (24 in)

3. Right: 600 mm (24 in)

4. Left: 600 mm (24 in)

600 mm

600 mm600 mm

1000 mm

ENVIRONMENT 31 December 1992

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1.2 POWER SOURCE

1. Input Voltage Level: 115 V/60 Hz

More than 15 A (for U.S.A. version)

220 V/230 V/240 V/50 HzMore than 7 A (for European version)

2. Permissible Voltage Fluctuation: ±10%

3. Do not set anything on the power cord.

NOTE: a) Make sure the plug is firmly inserted in the outlet.

b) Avoid multi-wiring.

31 December 1992 ENVIRONMENT

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2. ACCESSORY CHECK

Check the accessories and their quantities according to the following list:

1. Copy Guide ............................................................................. 1 pc

2. Original Guide ......................................................................... 2 pcs

3. Left Inner Cover Bracket ......................................................... 1 pc

4. Pick-off Pawl Unit.................................................................... 1 pc

5. Right Inner Cover.................................................................... 1 pc

6. Left Inner Cover ...................................................................... 1 pc7. Inner Cover Bracket ................................................................ 1 pc

8. Pan-head Screw (M4 x 6) .......................................................12 pcs

9. Pan-head Screw (M4 x 8) ....................................................... 2 pcs

10. Flat-head Screw (M4 x 6) ....................................................... 3 pcs

11. Fixing Plate ............................................................................. 1 pc

12. Copy Exit Support ................................................................... 1 pc

13. Gear ....................................................................................... 1 pc

14. Spring...................................................................................... 1 pc

15. Bushing ................................................................................... 4 pcs

16. Plastic Cap.............................................................................. 2 pcs

17. Allen Screw ............................................................................. 1 pcs

1

2

4 5

6

7

8, 9

10

3

11

12

14 15

13

1716

ACCESSORY CHECK 31 December 1992

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3. INSTALLATION PROCEDURE

1. Stick mylar sheets (large [A] and small [B]).

2. Install the copier on the table. Align the 2 pins [C] and 2 holes [D]. Fix the

rear side (1 screw and spacer each) and the front right side (2 bolts).

0 ~ 3 0 ± 3

0 ~ 3

0 ± 3

[B]

[A]

[C]

[D]

31 December 1992 INSTALLATION PROCEDURE

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3. Remove all stripsof shipping tape

and accessories.

4. Open the

original feed unit[A] and remove

the two spacers[B]. Remove the

protective sheet

from the

exposure glass.

5. Remove the right

middle cover [C](4 screws).

[A][B]

[B]

[C]

INSTALLATION PROCEDURE 31 December 1992

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6. Open the main board[A] (1 screw).

7. Remove the plate [B] (4

screws), fixing the right

portion of the upper unitto the lower unit. (Keep

two screws for

mounting the fixing

plate later.)

8. Remove the left middlecover [C] (4 screws).

[C]

[B]

[C]


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CAUTION: Make sure that the middle unit is closed completelybefore carrying out step 9. Otherwise, the middle unitcould open suddenly.

9. Remove the screw [A]

fixing the left portion of the

upper unit to the lower unit.

10. Lift up the handle [B] andopen the middle unit [C].

11. Install the fixing plate [D](2 screws). Then, reinstall

the main board bracket.

[A]

[C]

[B]

[D]


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12. Install the left innercover bracket [A] (2

screws).

13. Install the pick-off

pawl unit [B] (2

connectors [C], 2

knob screws [D], and2 positioning pins).

14. Remove the drum

protection sheet [E] by

turning the main motor

[F] counterclockwise.

Make sure that notape is left on thedrum.

[A]

[D]

[B] [C]

[F]

[E]


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15. Reset the cleaningblade by pulling the

release lever [A]

towards the front

side.Then close the

middle unit and

open the original

feed unit.

16. Open the tonercartridge cover [B], and

place a level [C] in the

space between the

cartridge cover and the

developer entrance.

Adjust the level of the

machine by turning thebolts on the 4 machine

feet.

17. Remove the spongeseal [D] from the

developer entrance.

[A]

[C][B]

[D]


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18. 220/230/240 V versionmachines only.

If the voltage of electrical

power supply from the wall

outlets is 230 V or 240 V,change the voltage as

follows:

a) Open the lower

registration guide plate [A](4 screws [B]) as shown.

b) Connect the input line

[C] to the appropriate

voltage (230 V or 240 V).

c) Reinstall the lowerregistration guide plate.

19. Turn on DIP SW 101-7and 8 on the main board

[C]. Then plug in the

power cord and turn on

the main switch [D].

20. Evenly pour 3 kg of

developer into the

development unit asshown.

Close the cartridge

cover and the originalfeed unit.

[A]

[B]

[C]

[C][D]


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21. Set the leading margin indicator [A] to 00 and the trailing margin indicator[B] to 01 as follows:

a) Press the margin key [C]. The leading margin indicator will blink.

b) Press the margin set key [D] to set the leading margin indicator to 00.

The trailing margin indicator will blink.c) Press the plus key [E] once to set the trailing margin indicator to 01.

22. Press the Copy Exit

Way key [F] to turnon the development

motor. Press the

Copy Exit Way keyagain after 2 or 3

seconds to turn themotor off.

23. Repeat step 22 until

all 3 kg of developer

has been loaded

into thedevelopment unit.

24. Turn off the main

switch and DIP SW101-7 and 8, and

unplug the power

cord.

25. Set the toner cartridge[G] as shown in the

figure.

[A]

[C] [B]

[D]

[F]

[E]

[G]


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26. Remove the sealingtape [A] on the cartridge

and turn the knob [B]

clockwise until it stops.

27. Lift up the release handle

[C] and open the middle

unit.

[B]

[A]

[C]


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28. Install the right innercover [A] and the

bracket [B] on the lower

unit. (Use 2 pan-head

screws for the bracket.Use 1 flat-head screw

and 3 pan-head screws

for the right inner cover.)

29. Install the left inner

cover [C] onto the lower

unit. (2 flat-head and 5pan-head screws)

30. Install the left middle

cover. (4 screws)

31. Install the copy guide[D] (2 screws).

[A]

[B]

[C]

[D]


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32. Set the two original guides[A].

33. Lower the lever [B] of therear table.

34. Install the copy exit

support [C], gear [D], andspring [E] as shown (4bushings, 1 Allen screw

[F]).

35. Install the 2 plastic caps[G].

36. Check the operation. If the

exit support levermovement seems heavy,

lower the fixing position of

the allen screw by around15 degrees.

[G]

[C]

[E]

[G]

[D][F]

[A]

[B]


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37. Stick 4 Velcro seals [A] tothe copier and table as

shown.

Set the 2 copy guidemylar strips [B] as shown.

[A]

[B]

[A]

[B]

[A]

[A]

[B]

0 ± 3

0 ± 3

0 ~ 3

0 ~ 3


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38. Plug in the power supplycord. Turn on DIP

SW101-8 on the main

board and turn on the

main switch.

39. Set the leadingmargin indicator [A] to

00 and the trailing

margin indicator [B] to05.

40. Set the copy counter

indicator [C] to 01

using the plus key.

Then, press the CopyExit Way key [D].

Turn off DIP SW101-8

to start initial

conditioning.Initial conditioning will

start, and stop

automatically when it is

completed.

41. Adjust the toner density

sensor voltage using SPmode #35.

42. Install the right middle

cover.

43. Check the copy quality

and copier operation.

[A]

[B]

[D]

[C]


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SECTION 4

SERVICE TABLES

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1. PREVENTIVE MAINTENANCE SCHEDULE

1.1 PM TABLESymbol key: I = Inspect L = Lubricate R = Replace A = Adjust

C = Clean

A. Original Feed_________________________________________________

EM 3.6km 7.2km 10.8km 14.4km 18km Notes

(6k) (12k) (18k) (24k) (30k) ( ) A1 sideways/ D size

1. Front original

feed roller

C C Water or alcohol

2. Rear originalfeed roller


3. Originalregistrationrollers


4. Platen roller C C C C C C Water or alcohol

5. Press rollers C C Water or alcohol

6. White plate C C C C C C Water or alcohol7. Auto image

density sensorC C C C C Blower brush

8. Original table C C C C C C Water or alcohol

B. Optics ______________________________________________________



1. Fiberoptic array

Clean with lenspaperif necessary

2. Exposure lamp I I I I I Replace ifdamaged

3. Exposureglass

C C C C C C Water or alcohol

31 December 1992 PREVENTIVE MAINTENANCE SCHEDULE

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C. Development_________________________________________________



1. Developer R

2. Side seals I I I I I Replace ifdamaged

3. Developmentfilter

R R

4. Toner supplyclutch

L Mobil Temp. 78

D. Around Drum_________________________________________________EM 3.6km 7.2km 10.8km 14.4km 18km Notes


1. Corona wires C C C C C C Blower brush, orif clean with adry cloth, don’texpand thecorona wires.

Replace at 20 K,(A1 sideways/ D size).

2. Wire cleanerpads

Replace at 20 K(A1 sideways/ D size).

3. Grid wires C C C C C C Dry cloth

4. Chargecoronaendblocks andcasing

C C C Dry cloth

5. T/S coronaendblocks andcasing

C C C C C C Dry cloth

6. Quenchinglamp

C C C C C C Dry cloth orblower brush

7. Pick-off pawls C C C C C Dry cloth

8. Pre-transfer

lamp


9. ID sensor C C C C C Dry cloth orblower brush

10. Transferguide plate


PREVENTIVE MAINTENANCE SCHEDULE 31 December 1992

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E. Cleaning ____________________________________________________



1. Cleaning blade C C C C C To prevent thecleaning bladeedge from beingdamaged, cleanit with your finger.Replace at 40 K(A1 sideways/ D size)

2. Cleaning seal I I I I I Replace ifdamaged

3. Used tonertank

I C C C C C Empty used toner

F. Paper Feed __________________________________________________



1. Manual feed

rollers

C C C C C C Water

2. Manual feedtable

C C C C C C Water

3. Registrationrollers

C C C C C Water

4. Spring clutch L Mobil Temp. 78

5. Registrationroller brake

I I I I I Clean with adamp cloth ifnecessary

6. Manual feedguide

C C C C C Water

G. Transport ___________________________________________________


(6k) (12k) (18k) (24k) (30k) ( ) A1 sideways/

D size

1. Transport belt C C C C C C Water

2. Transportguide plate

C C C C C C Water


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H. Fusing ______________________________________________________



1. Hot roller Replace at 48K(A1 sideways/ D size).

2. Pressure roller Replace at 120K(A1 sideways/ D size).

3. Fusingthermistors

C Suitable solvent

4. Hot rollerstrippers C Suitable solvent

5. Fusing/exitguide plate

Suitable solventif necessary.

I. Others_______________________________________________________



1. Timing belts I I I I I Adjust thetension ifnecessary.

2. Chains I L I L I Adjust thetension ifnecessary.Lubricate withMobil Temp. 78.

3. Gears I L I L I Mobil Temp. 78.

4. Ozone filters R R R R R


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J. Sheet Feeder_________________________________________________



1. Feed roller C C C C C C WaterReplace at 40 K(A1 sideways/ D size).

2. Friction pad C C C C R C Water

3. Bottom platepad

Replace at 40 K(A1 sideways/ D size).

4. Relay rollers C C C C C Water5. Paper feed

guide plateClean with adamp cloth ifnecessary.

6. Spring clutch L Mobil Temp. 78

7. Teflon tape(2 tapes)

R

K. Roll Feeder __________________________________________________



1. Feed Roller C C C C C C Water

2. Exit Roller C C C C C C Water

L. Roll Feeder Connector _________________________________________EM 3.6km 7.2km 10.8km 14.4km 18km Notes


1. Relay Rollers C C C C C

2. Spring Clutch L Mobil Temp. 78


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1.2 REGULAR PM PROCEDURE

Make a copy of OS-A1 chart at manual imagedensity level 7.

Clean the platen roller, white plate, auto image

density sensor, and original table by using

water, alcohol or blower brush.

Clean the front original feed roller, rear original

feed roller, original registration roller, and press

rollers by using water or alcohol.

1. Clean the exposure glass by using water oralcohol.

2. Inspect the exposure lamp.

3. Clean the fiber optics array with lens paper ifnecessary.

NOTE: After removing the drum, wrap it in

clean sheets of paper to protect it.

1. Clean the corona wires and grid wires with ablower brush or dry cloth.

Note: When using dry cloth, don’t expand thecorona wires.

2. Clean the T/S corona endblocks, casing, andthe transfer guide plate with dry cloth.

3. Clean the quenching lamp and pre-transferlamp with dry cloth or blower brush.

4. Clean the ID sensor with dry cloth or blower

brush.

5. Clean the pick-off pawls with dry cloth.

1. Make a Copy

2. Original Feed

(every 6 K)

3. Optics (every 6 K)

Original Feed

(every 12 K)

4. Around Drum

(every 6 K)

Every 6 K ( A1 sideways/D size)

Every 12 K (A1 sideways/D size)


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Clean the charge corona endblocks and casing

with dry cloth.

Replace the charge corona wires and wire

cleaner pads.

1. Empty used toner tank.

2. Inspect the cleaning seal.

3. Clean the cleaning blade with your finger.

Inspect the side seals.

5. Cleaning Unit

(every 6 K)

Around Drum(every 12 K)

6. Development Unit

(every 6 K)

Around Drum

(every 20 K)

Replace the cleaning

blade (every 40 K)

40 K

Replace the developmentfilter (every 12 K)

Lubricate the toner supply

clutch (every 18 K)

18 K

20 K


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1. Clean the manual feed rollers andregistration rollers with water.

2. Clean the manual feed table and manualfeed guide with water.

3. Inspect the registration roller brake.

Clean the transport belt and transport guideplate with water.

1. Clean the thermistors.

2. Clean the hot roller stripper.

120 K

7. Paper feed

(every 6 K)

8. Transport (every 6 K)

Lubricate the paperfeed clutch (every 18 K)

18 K

9. Fusing Unit

(every 18 K)

Replace the developer(every 30 K)

30 K

Replace the hot roller

(every 48 K)

Replace the pressureroller (every 120 K)

18 K

48 K


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1. Replace the ozone filter.

2. Inspect the timing belts, chains and gears.

Lubricate the chains and gears.

Clean the feed roller, friction pad and relay

rollers with water.

Lubricate the spring clutch.

Replace the friction pad and teflon tape (2 pcs).

Replace the feed roller and bottom plate pad.

Clean the feed roller and exit roller with water.

10. Others (every 6 K)

11. Sheet Feeder

(every 6 K)

Others (every 12 K)

Sheet Feeder(every 18 K)

Sheet Feeder(every 24 K)

18 K

24 K

Sheet Feeder

(every 40 K)

40 K

12. Roll Feeder

(every 6 K)


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Clean the relay rollers.

Lubricate the spring clutch.

1. Check the copy quality.

2. Adjust the light sensor voltage by turningVR102 on the main board.

3. Adjust the ADS reference voltage by SP#37.

4. Adjust the Vsg by SP#33.

13. Roll FeederConnector

(every 6 K)

Roll Feeder

Connector

(every 18 K)

14. Copy Quality

18 K


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2. SERVICE TABLES

2.1 TEST POINTS

Main Board

NUMBER FUNCTION

TP101 Original registration sensor

Adjusts the voltage to +2.6 ± 0.1 volts by VR101

TP102 ID sensor (Vsg)


TP103 Toner density sensorAdjusts the voltage to +4.0 ± 0.1 volts by VR105

TP104 Auto image density sensor (ADS)


TP105 Light sensor

Adjusts the voltage by VR102

TP106 GND

TP107 Vcc (+5 volts)

TP108 VAA (+24 volts)

2.2 VARIABLE RESISTORS

Main Board

NUMBER FUNCTIONVR101 Adjusts original registration sensor voltage

(+2.6 ± 0.1 volts)

VR102 Adjusts light sensor voltage

VR103 Adjusts ADS reference voltage (+3.0 ± 0.1 volts)

VR104 Adjusts Vsg (+4.0 ± 0.1 volts)

VR105 Adjusts toner density sensor voltage

(+4.0 ± 0.1 volts)

31 December 1992 SERVICE TABLES

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Charge/Grid/Bias Power Pack

NUMBER FUNCTION

VR101 Adjusts charge corona current

VR102 Factory useVR201 Adjusts grid voltage

VR301 Adjusts development bias voltage

Transfer/Separation Power Pack

NUMBER FUNCTION

T1 Adjusts low (normal) transfer corona current

(T.Trig)

T2 Adjusts high transfer corona current (T.Sel)

D1 Adjusts ac current of separation corona

D2 Adjusts dc current of separation corona

D3 Not used

DC Power Supply Unit

NUMBER FUNCTION

VR Factory use (Adjusts 5 volts)

SERVICE TABLES 31 December 1992

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2.3 DIP SWITCHES

Main Board

NUMBER OFF ON

DPS101-1 Normal Free run (A1 sideways/D size feed cycle)

DPS101-2 Normal Forced ready condition (no warm-up)

DPS101-3 Length counter(for total counter)

Copy counter (for total counter)

DPS101-4 *Millimeters **Inches

DPS101-5 Normal ***Clear counter memory

DPS101-6 Normal ***Input check

DPS101-7 Normal ***Output check

DPS101-8 Normal ***Service program mode (SP mode)

DPS102-1to

DPS102-6Not used

DPS102-7 50 Hz (paper feedmotor of the roll feeder)

60 Hz (paper feed motor of the roll feeder)

DPS102-8 Service call reset Service call reset

SW101 Normal Sends the reset signal to the main CPU

* Increments the total counter every meter of paper.

** Increments the total counter 100 inches of paper.

*** Refer to the Service Tools section for details.

Note: 1. DPS101-4 is effective only when the DPS101-3 is turned off

(length counter).

2. Do not change DPS101-3 and 101-4 positions from the

factory setting.3. If a main CPU malfunction occurs, turn on SW101 to

reset the main CPU.

4. In the free run mode (DPS101-1 ON), the copier automatically

operates without paper feeding after the original is inserted

and pulled out.

5. To clear the service call condition for fusing (E2, E3, E4, E5,

E6, E9 and EA), the position of DPS102-8 must be changedfrom OFF to ON or from ON to OFF before the main switch

is turned on.

31 December 1992 SERVICE TABLES

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3. SERVICE TOOLS

3.1 SERVICE PROGRAM MODE

The service program (SP) mode is used to check electrical data and change

modes or adjustment values.

3.1.1 Access Procedure

1. Turn on the main switch.

2. Turn on DPS101-8 on the main board.

NOTE: The Call Service [A] and Add Toner [B] indicators will blink. This isto confirm that the correct mode has been selected.

ON

1 2 3 4 5 6 7 8

[D]

[H]

[C]

[G]

[J] [I]

[E]

[F]

[B][A]

SERVICE TOOLS 31 December 1992

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3. Enter the desired SP mode number as follows:a) Press the Margin key [C]. "00" will blink in the Leading Margin indicator

[D]. Enter the desired SP mode number using the Plus [E] or Minus [F]

key (The SP mode numbers are given in the Service Program Mode

Table).

b) Press the Margin Set key [G]. "00" will blink in the Trailing Margin

indicator [H]. Enter the desired SP mode number using the Plus or

Minus key (The SP mode numbers are given in the Service Program

Mode Table.)

Press the Margin Set key again. Then, the data will be displayed in the

Copy Counter indicator [I].

4. Enter the desired value or mode using the Plus or Minus key, and thenpress the Copy Exit Way key [J] (SP mode data are given in the Service

Program Mode Table).

NOTE: 1. The beeper will sound three times after a value or mode is

entered.

2. For some SP modes, you only need to press the Copy ExitWay key directly without pressing the Plus or Minus key.

(These SP modes are marked "#" in the Service ProgramMode Table.)

5. Input a new SP mode number as follows: (when changing to another

mode number)

a) Press the Margin key. A number will blink in the Leading Margin

indicator. Enter the desired SP mode number using the Plus or Minus

key.

NOTE: It is possible to input a new SP mode number when the

number in the Leading Margin indicator is blinking.

b) Press the Margin Set key. A number will blink in the Trailing Margin

indicator. Enter the desired SP mode number using the Plus key or

Minus key. Press the Margin Set key again.

NOTE: It is possible to input a new SP mode number when the

number in the Trailing Margin indicator is blinking.

6. To leave the SP mode, turn off the DSP101-8.

31 December 1992 SERVICE TOOLS

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3.1.2 Service Program Mode Table

1. In the Function column, comments are in italics.

2. In the data column, the default value is printed in bold letters.

3. A "#" after the mode number means that you only need to press the Copy

Exit Way key directly without pressing the Plus or Minus key to enter the

desired value or mode.

4. A "°" after the mode number means that the mode can be accessed by

Sales representatives.The access procedure is as follows:

1) While simultaneously pressing the Plus, Minus and Clear/Stop keys,

turn on the main switch.

NOTE: The Call Service and Add Toner indicators will blink. This is to

confirm that the correct mode has been selected.

2) Follow the steps 3 to 5 of the SP mode access procedure.

3) To leave this mode, turn off the main switch.

Mode No.

Function DataNo. Leading

Margin

Indicator

Trailing

Margin

Indicator

1 00 01 Exposure Lamp OFF

When the main switch is turned off, thismode is automatically selected to default.

(0: Normal)

0: Normal1: Lamp OFF

Use this mode for removing the excess toner from the development unit.

2 00 02 Misfeed Detection OFF

Copies are made without misfeeddetection.When the main switch is turned off, thismode is automatically returned to thedefault. (0: Normal)

0: Normal1: Misfeed

detection OFF

Use this mode to check whether the paper misfeed was caused by a sensor malfunction.


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Mode No.


Margin

Indicator

Trailing

Margin

Indicator

3 00 03 Toner Density Sensor Control Cancel

Cancel the toner density sensor function.When the toner density sensor function iscanceled, ID sensor is only used to controlthe toner density in the development unit.

0: Normal

1: Toner densitysensorcontrol

canceled.

Use this mode when the toner density sensor does not function correctly.

5 00 05 Initial Conditioning

Sets the data value corresponding to theVsp/Vsg ratio of new developer.

Turn off DPS101-8 to start initialconditioning. The machine will stopautomatically after initial conditioning iscompleted. Press the Copy Exit Way key toreturn to normal mode.

0: Normal1: Initial

conditioning

Initial conditioning must be done whenever new developer is installed.The CPU monitors Vsg and Vsp for the developer counter correction during the initial conditioning.

The density level (0 ~4) will be displayed on the copy counter indicator.Density Level (dL) Vsp/Vsg X 100 (%)

0 0 10 1 10 15 2 15 20 3 20 25 4 > 25

NOTE: 1. If Vsp/Vsg X 100 is more than 50,

"E" is displayed (abnormal condition).2. If Vsp is more than 2.5 volts or the

Vsg is less than 2.5 volts, "P" is displayed (abnormal condition).

6

#°00 06 All Indicators ON

Turns on all the indicators on the operationpanel.

To turn off the indicators, press the Copy Exit Way key.

7

°00 07 Auto Reset Time

Selects auto reset time from 1 to 5 minutes,or cancels this mode.

0: 2 min1: 1 min

2: 3 min3: 4 min4: 5 min5: No auto reset

8

°00 08 Count Up/Down

Selects count up or count down.

0: Up1: Down


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Mode No.


Margin

Indicator

Trailing

Margin

Indicator

9

°

00 09 Key Tone ON/OFF

Selects key tone on or off.

0: ON

1: OFF

10

°01 00 Default ID Setting

Specifies whether the copier defaults toADS or manual ID level 7 when the mainswitch is turned on.

0: ADS1: Manual ID level 7

11

°01 01 Default Paper feed

Specifies whether the copier defaults tosheet feeder, synchro cut, preset cut, or

manual feed when the main switch isturned on.

0: Sheet feeder1: Synchro cut2: Preset cut: 11893: Preset cut: 841

4: Preset cut: 5945: Preset cut: 4206: Preset cut: 2977: Manual feed

12

°01 02 Default Paper Exit

Specifies whether the copier defaults toupper exit or lower exit.

0: Upper exit1: Lower exit

13 01 03 Pheripherals Installation

Enables peripheral operation.

0: Copier + SheetFeeder + RollFeeder

1: Copier + RollFeeder + RollFeeder Connector

2: Copier + SheetFeeder

3: Copier only

This SP mode must be done whenever pheripheral is installed.

15 01 05 Copy Paper/Original Waiting Time

After the original (copy paper) is inserted,the copier will wait for the set number ofminutes before feeding the original (copy

paper) out, if no copy paper (original) isinserted.

0: 2 minutes1: 1 minute2: 3 minutes3: 4 minutes4: 5 minutes

5: No limit

16 01 06 Factory Use

17 01 07 Toner Supply Amount

Determines how much toner is supplied.

0: 15%1: 7.5%2: 30%3: 60%

18 01 08 ID Sensor Bias Adjustment

Sets the bias voltage applied to the

development roller for the ID sensor pattern.

0: –200V1: –180V2: –240V

3: –280V4: –320VThe ID sensor bias voltage is also decreased or increased by the developer counter correction.The value for the developer counter correction is decided according to the Vsp/Vsg data obtained from initial conditioning.(SP#5)


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Mode No.


Margin

Indicator

Trailing

Margin

Indicator

19 01 09 Image Bias Adjustment

Adjust image bias output if the imagedensity at ID level 7 cannot be adjusted bythe light sensor adjustment. (VR102 on themain board)

0: Normal (V0)

1: Darkest(V0 + 40V)2: Darker

(V0 + 20V)3: Lighter

(V0 – 20V)4: Lightest

(V0 – 40V)

Vo is decided by the manual ID setting (level 1~ 26) or the background image density of the original in ADS mode.

20

°02 00 ADS Level

Selects the image density level in ADS

mode.

0: Normal1: Lighter2: Darker

Data 1(Lighter): Increases development bias by –20 volts Data 2 (Darker): Decreases development bias by +20 volts.

21 02 01 ID Sensor Detection Interval

ID sensor check is performed every 1220mm length of originals or 610 mm length oforiginals.

0: 1220 mmoriginals

1: 610 mmoriginals

If low image density occurs in the toner

near end condition, change the data to "1".22 02 02 ID Sensor Grid Voltage Adjustment

Adjust the ID sensor grid voltage if the IDsensor bias adjustment (SP#18) fails toachieve.

0: –460V1: –400V2: –440V3: –500V4: –540V5: –600V6: –640V

23 02 03 Image Grid Voltage Adjustment

Adjusts the image grid voltage if the lightsensor adjustment (VR102) and image biasadjustment (SP#19) fail to achieve.

0: –940V1: –860V2: –900V3: –980V4: –1020V

24 02 04 PTL OFF Timing

Adjusts the PTL off timing for the trailingedge of the copy paper.

0: –15 mm (fromtrailing edge ofthe copy paper)

1: Not OFF2: –30 mm3: –25 mm4: –20 mm5: –10 mm6: – 5 mm7: ± 0 mm8: + 5 mm9: +10 mm

If a blank image appears on the trailing edge of the copy paper, change the data.


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Mode No.


Margin

Indicator

Trailing

Margin

Indicator

25 02 05 Leading Edge Blank Margin Adjustment

Adjusts the leading edge blank margin(1 mm/step).

0: ± 0 mm

1: –5 mm2: –4 mm3: –3 mm4: –2 mm5: –1 mm6: +1 mm7: +2 mm8: +3 mm9: +4 mm

26 02 06 Fine Registration Adjustment–ManualFeed and Sheet Feeder

Adjusts registration for the manual feedand sheet feeder (0.25 mm/step).

0: ± 0 mm1: –1.0 mm

2: –0.75 mm3: –0.5 mm4: –0.25 mm5: +0.25 mm6: +0.5 mm7: +0.75 mm8: +1.0 mm

27 02 07 Rough Registration Adjustment–ManualFeed and Sheet Feeder

Adjusts registration for the manual feed

and sheet feeder (1 mm/step).

0: ± 0 mm1: –5 mm2: –4 mm3: –3 mm

4: –2 mm5: –1 mm6: +1 mm7: +2 mm8: +3 mm9: +4 mm

28 02 08 Hot Roller Temperature Adjustment

Increase or decrease the operatingtemperature of the hot roller (1°C/step).

0: ± 0°C1: –4°C2: –3°C3: –2°C4: –1°C

5: +1°C6: +2°C7: +3°C8: +4°C9: +5°C

29 02 09 Pressure Roller Temperature Adjustment

Increase or decrease the operatingtemperature of the pressureroller(2°C/step).

0: ± 0°C1: –8°C2: –6°C3: –4°C4: –2°C5: +2°C

6: +4°C7: +6°C8: +8°C9: +10°C


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Mode No.


Margin

Indicator

Trailing

Margin

Indicator

32

#

03 02 Fusing Temperature Display

Displays the hot roller and pressure rollertemperature.

"F"= Hot roller

Temperature"P"= PressurerollertemperatureDisplays the hot roller and pressure roller

temperature in the following order.1. "F" 2. Hot roller temperature

(100°C ~ 210°C)3. "P" 4. Pressure roller temperature

(50°C ~ 180°C)To stop the fusing temperature display,press the Copy Exit Way key.

Note: If the hot roller temperature is less than 100°C or pressure roller temperature is less than 50°C, "LLL" is displayed.If the hot roller temperature is more than 210°C or pressure roller temperature is more than 180°C, "HHH" is displayed.

33#

03 03 Vsg Adjustment

Adjusts Vsg.

"A"= Vsg

Adjusts Vsg to +4.0 ± 0.1 volts using VR104 on the main board.The main motor and ID sensor LED turn on when the Copy Exit Way key is pressed.After the adjustment is finished, press the Copy Exit Way key.

34#

03 04 Vsg & Vsp Display

Displays the latest Vsp, Vsg and Vsp/Vsg.

"A"= Vsp (volts)"C"= Vsg (volts)"F"= Vsp/Vsg

Displays the latest Vsp, Vsg and Vsp/Vsg in the following order.

1: "A=" 2: Vsp data (volts)3: "C=" 4: Vsg data (volts)5: "F=" 6: Vsp/Vsg data

To stop the display. Press the Copy Exit Way key.


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Mode No.


Margin

Indicator

Trailing

Margin

Indicator

35

#

03 05 Toner Density Sensor Adjustment

Adjusts toner density sensor voltage.

"A"= Toner

density sensorvoltage.

Adjusts toner density sensor voltage to +4.0 ± 0.1 volts using VR105 on the main board.This adjustment must be done only when the new developer is installed. After the adjustment is finished, press the Copy Exit Way key.

36#

03 06 Toner Density Sensor Voltage Display

Displays the latest toner density sensorvoltage.

"A"= Tonerdensity sensor

voltage.

To stop the display, press the Copy Exit Way key.

37#

03 07 ADS Reference Voltage Adjustment

Adjusts ADS voltage for the white plate.

"A"= ADS voltagefor white plate.

Adjusts ADS voltage for the white plate to +3.0 ± 0.1 volts using VR103 on the main board.After the adjustment is finished, press the Copy Exit Way key.

38#

03 08 ADS Voltage Display

Displays the latest Vod (ADS voltage forthe original), Vsd (ADS voltage for thewhite plate) and Vod/Vsd.

"A" = Vod (volts)"B" = Vsd (volts)"F" = Vod/VsdDisplays the latest Vod, Vsd and Vod/Vsd

in the following order.1 = "A" 2 = Vod data (volts)

3 = "C" 4 = Vsd data (volts)5 = "F" 6 = "Vod/Vsd data


39 03 09 Toner Density Sensor Voltage UpperLimit

Selects the upper limit voltage for the tonerdensity sensor.

0: 2.4 V (4.5 wt%)1: 2.6 V (4.0 wt%)2. 2.2 V (5.0 wt%)

40 04 00 Not Used (Domestic market only)

41 04 01 Maximum Copy Quantity

Limits the maximum copy quantity that canbe entered.

0: Up to 10 copies1: Up to 99 copies


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Mode No.


Margin

Indicator

Trailing

Margin

Indicator

42

#

04 02 Total Original Misfeeds

Displays the total number of originalmisfeeds (4 digits).

"J" = Total number

of originalmisfeeds.


43#

04 03 Original misfeeds –Upper TransportSection Displays the number of original misfeedsin the upper transport section (4 digits).

"J" = Number oforiginalmisfeeds.

To stop the display, press the Copy Exit

Way key.44#

04 04 Original Misfeeds –Turn Section

Displays the number of original misfeeds inthe turn section (4 digits).



45#

04 05 Original Misfeeds –Lower TransportSection

Displays the number of original misfeeds inthe lower transport section (4 digits).



46#

04 06 Original Misfeeds –Rear TransportSection

Displays the number of original misfeeds inthe rear transport section (4 digits).



47#

04 07 Original Misfeeds –Recycle Gate/SwitchBack Gate

Displays the number of original misfeedswhen the recycle gate or switch back gatedoes not move properly (4 digits).



48#

04 08 Original Misfeeds –Others

Displays the number of original misfeeds inother sections (4 digits).




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Mode No.


Margin

Indicator

Trailing

Margin

Indicator

50

#

05 00 Total Paper Misfeeds

Displays the total number of papermisfeeds (4 digits).

"J" = Total number

of papermisfeeds.


51#

05 01 Paper Misfeeds –Sheet Feeder

Displays the number of paper misfeeds inthe sheet feeder (4 digits).

"J" = Number ofpaper misfeeds.


52#

05 02 Paper Misfeeds –Manual Feed andRegistration

Displays the number of paper misfeeds inthe manual feed and registration sections(4 digits).



53#

05 03 Paper Misfeeds –Pick-off

Displays the number of paper misfeeds inthe pick-off section (4 digits).



54#

05 04 Paper Misfeeds –Exit

Displays the number of paper misfeeds inthe exit section (4 digits).



55

#

05 05 Paper Misfeeds –Others

Displays the number of paper misfeeds inother sections of the copier (4 digits).

"J" = Number of

paper misfeeds.


56#

05 06 Paper Misfeeds –Roll Feeder

Displays the number of paper misfeeds inthe roll feeder (4 digits).



Way key.


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Mode No.


Margin

Indicator

Trailing

Margin

Indicator

58

#

05 08 Exposure Lamp Abnormal Display

Displays when the voltage from the lightsensor is less than 0.45 volts for 20seconds.

"–" = Normal

"E" = Abnormal

When this condition occurs, the Call Service indicator does not light and copying is possible.To stop the display, press the Copy Exit Way key.

59#

05 09 Exposure Lamp Thermistor OpenDisplay

Displays when the resistance of theexposure lamp thermistor is more than 248Ω for 20 seconds.

"–" = Normal"E" = Abnormal


61#

06 01 ID Sensor Abnormal Display

Displays when the Vsg is less than 2.5volts or Vsp is more than 2.5 volts.

"–" = Normal"E" = Abnormal




64

#

06 04 Developer Counter

Shows the total millimeters of copies madewith the developer installed in the machine.

"dEu" = Millimeters

of copies(122 mm/ number)

This counter clears when the initial conditioning (SP#5) is performed after the new developer is installed.To stop the display, press the Copy Exit Way key.The maximum number is "4001".


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Mode No.


Margin

Indicator

Trailing

Margin

Indicator

65

#

06 05 Density Level Display

Shows the density level (0 ~ 4) after theinitial conditioning (SP#5) is performed.

"dL" = Density level

(0 ~4)

Density Level Vsp/Vsg x 100 0 0 –10 1 10 – 15 2 15 –20 3 20 –25 4 > 25

NOTE: 1. If the Vsp/Vsg X 100 is more than 50,

"E" is displayed (Abnormal condition).2.If the Vsp is more than 2.5 volts or the

Vsg is less than 2.5 volts, "P" is displayed (Abnormal condition).


66#

06 06 Total Copy Counter

Displays the total number of copies made(6 digits)

" " = Number ofcopies


Way key.67#

06 07 Total Length Counter –Meters

Displays the total meters of copies made(6 digits).

" " = Meters ofcopies(meter/ number)


68 06 08 Total Length Counter –Inches

Displays the total inches of copies made(6 digits).

" " = Meters ofcopies(100 inches/

number)To stop the display, press the Copy Exit Way key.







76 07 06 Fine Cut Length Adjustment –Synchro

Cut Mode Adjusts the cut length of the synchro cutmode to match the original length (0.25mm/step).

0: ± 0 mm

1: –1.0 mm2: –0.75 mm3: –0.5 mm4: –0.25 mm5: +0.25 mm6: +0.5 mm7: +0.75 mm8: +1.0 mm

1

2

3


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Mode No.


Margin

Indicator

Trailing

Margin

Indicator

77 07 07 Rough Cut Length Adjustment

–Synchro Cut Mode Adjusts the cut length of the synchro cutmode to match the original length(1 mm/step).

0: ± 0 mm

1: –5 mm2: –4 mm3: –3 mm4: –2 mm5: –1 mm6: +1 mm7: +2 mm8: +3 mm9: +4 mm

78 07 08 Fine Registration Adjustment –RollFeeder

Adjusts registration of the roll feeder(0.25 mm/step).

0: ± 0 mm1: –1.0 mm

2: –0.75 mm3: –0.5 mm4: –0.25 mm5: +0.25 mm6: +0.5 mm7: +0.75 mm8: +1.0 mm

79 07 09 Rough Registration Adjustment –RollFeeder Adjusts registration of the roll feeder

(1 mm/step).

0: ± 0 mm1: –5 mm2: –4 mm3: –3 mm

4: –2 mm5: –1 mm6: +1 mm7: +2 mm8: +3 mm9: +4 mm

80 08 00 Cut Error Correction 1 –Preset Cut297 mm

Correct cut error for preset cut 297 mm.

Input "0" or "1" according to the decal onthe roll feeder right cover.

0: +1: –

This SP mode must be done when the roll feeder is installed.



Input the number according to the decal onthe roll feeder right cover

(1 mm/step).

0 ~ 9



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Mode No.


Margin

Indicator

Trailing

Margin

Indicator

82 08 02 Cut Error Correction 3 –Preset Cut

297 mm


Input the number according to the decal onthe roll feeder right cover(0.1 mm/step).

0 ~ 9




Input "0" or "1" according to the decal onthe roll feeder right cover.

0: +1: –




Input the number according to the decal onthe roll feeder right cover(10 mm/step).

0 ~ 2





0 ~ 9


86 08 06 Paper Buckle Adjustment –Roll Feeder

Adjusts the amount of paper buckle in theroll feeder.

0: ± 0 mm (80 mm)1: – 20 mm2: – 16 mm3: – 12 mm4: – 8 mm5: – 4 mm6: + 4 mm7: + 8 mm8: + 12 mm9: + 14 mm


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Mode No.


Margin

Indicator

Trailing

Margin

Indicator

92 09 02 Cut Error Correction 3 – Synchro Cut

297 mm Correct cut error for synchro cut 297 mm. Input the number according to the decal onthe roll feeder right cover(0.1 mm/step).

0 ~ 9


93 09 03 Cut Error Correction 1 –Synchro Cut1189 mm

Correct cut error for synchro cut 1189 mm. Input "0" or "1" according to the decal stuckon the roll feeder right cover.

0: +1: –



Correct cut error for synchro cut 1189 mm.


0 ~ 2



Correct cut error for synchro cut 1189 mm.


0 ~ 9


96 09 06 Fusing Lower Limit Temperature

Select 3 modes in case the fusingtemperature drops below the lower limittemperature.

0: Normal1: Forced Copy2: Auto Start


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3.2 INPUT CHECK MODE

The input check mode allows you to check the current status electrical

components (such as sensors, switches, etc.) from the operation panel.



2. Turn on DPS101-6 and 101-8 on the main board

NOTE: The Call Service [A] and Misfeed [B] indicators will blink. This is to

confirm that the correct mode has been selected.

ON

1 2 3 4 5 6 7 8

[D]

[H]

[C]

[G]

[J][I]

[E]

[F]

[B][A]


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3. Enter the desired input check number as follows:

a) Press the Margin key [C]. "00" will blink in the Leading Margin indicator

[D]. Enter the desired input check number using the Plus [E] or Minus

[F] key.

(The input check numbers are given in the Input Check Mode Table.)


indicator [H].

Enter the desired input check number using the Plus or Minus key.

(The input check numbers are given in the Input Check Mode Table.)

Then, the current electrical component status will be displayed in the

Upper Exit indicator [I] or Lower Exit indicator [J].

4. Input a new input check number as follows: (When changing to another

mode number)


indicator. Enter the desired input check number using the Plus or

Minus key.

NOTE: It is possible to input a new input check number when thenumber in the Leading Margin indicator is blinking.


indicator. Enter the desired input number using the Plus or Minus key.

Press the Margin Set key again.

NOTE: It is possible to input a new input check number when the


5. To leave input check mode, turn off DPS101-6 and 101-8.


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3.2.2 Input Check Mode Table

Input check No

Sensor/Switch/Signal

Status

No Leading

Margin

Indicator

Trailing

Margin

Indicator

Upper ExitIndicator

Lower ExitIndicator

0 00 00 Original Set Sensor Original detected Original notdetected1 00 01 1st Original Transport

Sensor

2 00 02 2nd Original TransportSensor

3 00 03 Original RegistrationSensor

4 00 04 Original Exit Sensor

5 00 05 Original Entrance

Sensor6 00 06 Recycle Gate Sensor Sensor not

actuatedSensor actuated

7 00 07 Switch Back GateSensor

8 00 08 Paper Entrance Sensor(Sheet Feeder)

Paper detected Paper notdetected

9 00 09 1st Feed Sensor

10 01 00 2nd Feed Sensor

11 01 01 Registration sensor

12 01 02 Transport Sensor13 01 03 Fusing Exit Sensor

14 01 04 Upper Exit Sensor

15 01 05 Lower Exit Sensor

16 01 06 Paper End Sensor(Sheet Feeder)

Paper detected Paper end

17 01 07 Sheet Feeder SetSwitch

Sheet feeder set Sheet feeder notset

18 01 08 Feed Pressure Switch(Sheet Feeder)

Feed pressurelever position 3

Feed pressurelever position

1 or 219 01 09 Leading Edge Sensor

(Roll Feeder)Paper detected Paper not

detected

20 02 00 Paper End Sensor(Roll Feeder)

Paper detected Paper end

21 02 01 Left Cutter Sensor(Roll Feeder)

Cutter detected Cutter notdetected

22 02 02 Right Cutter Sensor(Roll Feeder)

23 02 03 Set Switch

(Roll Feeder)

Roll feeder set Roll feeder not set

24 02 04 Door Safety Switch(Roll Feeder)

All roll feederdoors closed

One of the rollfeeder doors isopen

25 02 05 Rear Feeder Switch Rear originaltable not set

Rear originaltable set

29 02 09 Stop Key Stop key ispressed

Stop key is notpressed


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Input check No

Sensor/Switch/Signal

Status

No Leading

Margin

Indicator

Trailing

Margin

Indicator

Upper ExitIndicator

Lower ExitIndicator

30 03 00 Toner Overflow Sensor Used toner

overflow

Used toner not

overflowed31 03 01 Exposure Lamp Heater ON OFF

32 03 02 Exposure LampThermistor Open

Open Not open(Normal)

33 03 03 Exposure LampThermistor Short

Short Not short(Normal)


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3.3 OUTPUT CHECK MODE

The output check mode allows you to turn the current individual electrical

components ON/OFF from the operation panel.



2. Turn on DPS101-7 and 101-8 on the main board.

NOTE: The Call Service [A] and Used Toner Tank [B] indicators will blink.

This is to confirm that the correct mode has been selected.

ON

1 2 3 4 5 6 7 8

[D]

[H]

[C]

[G]

[J]

[I]

[E]

[F]

[B]

[A]


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3. Enter the desired output check number as follows:a) Press the Margin key [C]. "00" will blink in the Leading Margin indicator

[D]. Enter the desired output check number using the Plus [E] or Minus

[F] key. (The output check numbers are given in the Output Check

Mode Table.)


indicator [H]. Enter the desired output check number using the Plus or

Minus key. (The output check numbers are given in the Output Check

Mode Table.) Press the Margin Set key again.

4. Press the Copy Exit Way key [I] to turn the electrical components on and

off.

NOTE: When the selected component is ON, "1" is displayed in the CopyCounter indicator [J]. When it is OFF, "0" is displayed in the Copy

Counter indicator.

5. Input a new output check number as follows: (When changing to anothernumber)


indicator. Enter the desired output check number using the Plus or

Minus key.

NOTE: It is possible to input a new output check number when the

number in the Leading Margin indicator is blinking.


indicator. Enter the desired output check number using the Plus or

Minus key. Press the Margin Set key again.

NOTE: It is possible to input a new output check number when the


6. To leave output check mode, turn off the DPS-101-7 and 101-8.


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3.3.2 Output Check

Output Check No

Electrical ComponentNo LeadingMargin

Indicator

TrailingMargin

indicator

0 00 00 Main Motor

1 00 01 Development Motor

2 00 02 Original Stopper Solenoid

4 00 04 Recycle Gate Solenoid

5 00 05 Original Forward Feed Clutch

6 00 06 Manual Feed Solenoid

7 00 07 Paper Stopper Solenoid8 00 08 Registration Clutch

9 00 09 Pick-off Solenoid

10 01 00 Exit Gate Solenoid

11 01 01 Pattern Shutter Solenoid

12 01 02 Toner Supply Solenoid

13 01 03 Sheet Feeder Solenoid 1

14 01 04 Sheet Feeder Solenoid 2

15 01 05 Fusing Lamp

16 01 06 ID Sensor LED

17 01 07 Total Counter

18 01 08 ADS Lamp

19 01 09 ADS Sample Hold

20 02 00 Quenching Lamp

21 02 01 Pre-transfer Lamp

22 02 02 Exposure Lamp Heater

23 02 03 Exposure Lamp(ADS mode … Full duty)(Manual ID level … ID level 1 ~ 26)

24 02 04 Charge Corona

25 02 05 Transfer Corona (low current: T1)

26 02 06 Transfer Corona (high current:T2)

27 02 07 Separation Corona (AC current: D1)

28 02 08 Separation Corona (DC current: D2)


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Output Check No


Indicator

TrailingMargin

indicator

29 02 09 Development Bias (Levels 0 to 9)



Copy Counter Indicator Dev. Bias Voltage

0 0 volt

1 – 60 volts

2 – 60 volts

3 – 80 volts

4 –100 volts

5 –120 volts

6 –140 volts

7 –160 volts8 –180 volts

9 –200 volts


0 –220 volts

1 –240 volts

2 –260 volts

3 –280 volts

4 –300 volts

5 –320 volts

6 –340 volts

7 –360 volts

8 –380 volts

9 –400 volts


0 –420 volts

1 –440 volts

2 –460 volts

3 –480 volts

4 –500 volts

5 –520 volts

6 –540 volts


9 –600 volts


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Output Check No


Indicator

TrailingMargin

indicator

32 03 02 Grid Voltage (Levels 0 to 9)



Copy Counter Indicator Grid Voltage

0 – 0 volts

1 –380 volts

2 –400 volts

3 –420 volts

4 –440 volts

5 –460 volts

6 –480 volts


9 –540 volts


0 –560 volts

1 –600 volts

2 –620 volts

3 –640 volts

4 –660 volts

5 –680 volts

6 –700 volts

7 –720 volts

8 –740 volts

9 –760 volts


0 –780 volts

1 –800 volts

2 –820 volts

3 –840 volts

4 –860 volts

5 –880 volts

6 –900 volts

7 –920 volts

8 –940 volts

9 –960 volts


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Output Check No


Indicator

TrailingMargin

indicator

38 03 08 Paper Feed Motor (Roll Feeder)

39 03 09 Cutter Motor (Roll Feeder)

74 07 04 Original Reverse Feed Clutch

75 07 05 Switch Back Gate Solenoid


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3.4 MEMORY CLEAR MODE

3.4.1 Misfeed Counter Clear Procedure

NOTE: This procedure clears the following counters:

SP42 ~ SP48 (Original Misfeed Counters)

SP50 ~ SP56 (Paper Misfeed Counters)



NOTE: The Call Service ( ), Misfeed ( ), Used Toner Tank ( ), and

Add Toner ( ) indicators will blink. This is to confirm that thecorrect mode has been selected.

3. Press the Plus or Minus key to display "5" in the Copy Counter indicator.

4. Press the Copy Exit Way key to clear.

5. Turn off DPS101-5 and 101-8.

3.4.2 All Memory Clear Procedure

CAUTION: All memory clear mode clears all the correction data forprocess control and software counters, and returns allthe modes to the default settings. Normally, this mode

should not be performed. This procedure is requiredonly when the copier malfunctions due to a damagedRAM or when replacing the RAM for any reason.



NOTE: The Call Service ( ), Misfeed ( ), Used Toner Tank ( ) and

Add Toner ( ) indicators will blink. This is to confirm that thecorrect mode has been selected.

ON

1 2 3 4 5 6 7 8


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3. Press the Plus or Minus key to display "9" on the Copy Counter indicator.

4. Press the Copy Exit Way key to clear memory.

5. Turn off DPS101-5 and 101-8.

6. Clean the optics, sensors, and inside of the copier if necessary.

7. Replace the old developer with new one.

CAUTION: Since the developer counter (SP64) for the developercounter correction has been cleared, the old developercannot be used.

8. Perform the following SP modes in sequence.(1) SP#13: Pheripheral Installation (If pheripherals are installed)

(2) SP#80 ~ SP#85, SP#90 ~ SP#95: Cut Error Corrections (If the roll

feeder is installed)

(3) SP#5: Initial Conditioning

(4) SP#35: Toner Density Sensor Adjustment

(5) SP#33: Vsg Adjustment

(6) SP#37: ADS Reference Voltage Adjustment

(7) Light Sensor Adjustment (by using VR102 on the main board)

(8) SP#26 or SP#27: Registration AdjustmentManual Feed and Sheet

Feeder

(9) SP#78 or SP#79: Registration AdjustmentRoll Feeder (If the rollfeeder is installed)

(10) SP#76 or SP#77: Cut Length AdjustmentSynchro Cut Mode

(If the roll feeder is installed)

(11) SP#88 or SP#89: Cut Length AdjustmentPreset Cut Mode



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4. JAM CODE LIST

When a document (original) jam or paper jam occurs, the cause of the jam is

displayed by using the following jam code.

4.1 ACCESS PROCEDURE

1. When a document jam or paper jam occurs, press and hold down the

Clear/Stop key.

2. Read the jam code (DJ001, PJ021, etc.)

NOTE: DJ = Document Jam, PJ = Paper Jam

4.2 DOCUMENT (ORIGINAL) JAM CODE

Code(DJ =)

Cause of JamSP Mode No

(Original Misfeed Counter)

00 No jam

01 Initial jam SP48 (Others)

02 An original is in the machine when the CallService indicator turns on.

16 2nd original transport sensor ON check SP43(Upper transport section)

17 2nd original transport sensor leading edge OFFcheck

18 Original registration sensor ON check SP45(Lower transport section)

19 Original registration sensor leading edge OFFcheck

20 Original is not fed within 6 seconds after theleading edge of the original is detected by originalset sensor. (When the original is fed from thefront original table.)

SP43(Upper transport section)

21 Original is not fed within 6 seconds after theleading edge of the original is detected by originalentrance sensor. (When the original is fed fromthe rear original table.)

SP46(Rear transport section)

JAM CODE LIST 31 December 1992

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Code(DJ =)



22 Original is too small. (Minimum: B5 lengthwise) SP43(Upper transport section)

23 Original is pulled out from the rear original table

after the original registration sensor turns on butbefore the original registration rollers start turning.

24 Original is under the original set sensor when theoriginal stopper solenoid turns on. (When theoriginal is fed from the front original table.)

25 Original is under the original entrance sensorwhen the original stopper solenoid turns on.(When the original is fed from the rear originaltable.)

26 Original is pulled out from the front original tableafter the registration sensor turns on but beforethe original registration rollers start turning.

27 The 1st original transport sensor stays on whenthe 2nd original transport sensor trailing edgeOFF check. (When the original is fed from thefront original table.)

28 The original registration sensor stays on whenthe original exit sensor trailing edge OFF check.(When the original is fed from the rear originaltable.)

29 Original registration sensor ON check for theswitch back mode.

SP45(Lower transport section)

30 Original entrance sensor ON check for the switchback mode.

31 Switch back gate does not move to the upposition when the switch back gate solenoid turnson.

SP47(Recycle gate/switch backgate)

32 2nd original transport sensor trailing edge OFF

check.

SP43

(Upper transport section)33 1st original transport sensor leading/trailing edge

OFF check for repeat copy.

34 1st original transport sensor ON check for repeatcopy.

35 Original registration sensor trailing edge OFFcheck.

SP45(Lower transport section)

36 Original exit sensor ON check.

37 Original exit sensor leading/trailing edge OFFcheck.

38 Original is too long. (Maximum: 3.6 meters) SP44(Turn section)

39 Recycle gate does not return to the originalposition (up position) when the recycle gatesolenoid turns off.


31 December 1992 JAM CODE LIST

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Code(DJ =)



40 Recycle gate does not move to down positionwhen the recycle gate solenoid turns on.


41 Switch back gate does not return to the originalposition (down position) when the switch backgate solenoid turns off.

42 Rear original table does not set when the switchback mode is selected.

SP48 (Others)

99 Original feed clutch stays on longer than 125seconds.

4.3 PAPER JAM CODE

Code(PJ =)


(Paper Misfeed Counter)

00 No Jam

01 Initial Jam SP55 (Others)

02 Paper remains in the machine when the CallService indicator turns on.

16 Paper entrance sensor (Sheet feeder) ON check.(When the sheet feeder is used.)

SP51 (Sheet feeder)

17 Registration sensor leading edge OFF check. SP52(Manual feed andregistration)18 Registration sensor ON check.

20 2nd feed sensor leading edge OFF check.

21 Original is not set within 10 second after thepaper is set in the manual feed table.

22 Paper is pulled out after the registration sensorturns on but before the registration clutch turnson.

23 Paper entrance sensor (sheet feeder) stays onwhen the 2nd feed sensor trailing edge OFFcheck. (Multiple feed from the sheet feeder.)

SP51 (Sheet feeder)

24 2nd feed sensor stays on when the registrationsensor trailing edge OFF check.

SP53 (Pick-off)

25 2nd feed sensor ON check.

26 Registration sensor does not turn on when theregistration clutch turns on.

27 Paper entrance sensor (sheet feeder) ON check.(When the roll feeder is used.)

SP56 (Roll feeder)

28 Loading edge sensor (roll feeder) ON check.

30 Cutter abnormal condition

JAM CODE LIST 31 December 1992

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Code(PJ =)


(Paper Misfeed Counter)

31 Pulse generator (roll feeder) abnormal. SP56 (Roll feeder)

32 Upper exit sensor ON check. SP54 (Exit)

33 Upper exit sensor leading edge OFF check.

34 Lower exit sensor ON check.

35 Lower exit sensor leading edge OFF check.

36 Upper exit sensor trailing edge OFF check.

37 Lower exit sensor trailing edge OFF check.

38 Fusing exit sensor leading edge OFF check. SP53 (Pick-off)

39 Fusing exit sensor ON check.

40 Registration sensor trailing edge OFF check.

41 Fusing exit sensor trailing edge OFF check. SP54 (Exit)

42 Transport sensor ON check.

43 Transport sensor leading edge OFF check.

44 Paper is too long. (Maximum: 3.6 meters) SP53 (Pick-off)

99 Registration clutch stays on longer than 125seconds.

SP55 (Others)

31 December 1992 JAM CODE LIST

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5. SPECIAL TOOLS AND LUBRICANTS

No DESCRIPTION PART NO. REMARKS

1 Digital Multimeter 54209507 BECKMAN RMS3030

2 Deluxe Test Lead

Accessory Kit

54209508 BECKMAN DL241

3 Grease – Mobil Temp.78 54479078 400 g/can

4 Current Measuring Drum A0239520

5 0.35 mm DG Gauge A0989105

6 0.5 mm DG Gauge A0989104

7 Test Chart OS-A1

(2 sheets/set)

A0239504

SPECIAL TOOLS AND LUBRICANTS 31 December 1992

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6. SERVICE REMARKS

6.1 DRUM

The organic photoconductor drum is comparatively more sensitive to light

and ammonia gas than a selenium drum.

1. Never expose the drum to direct sunlight.

2. Never expose the drum to direct light of more than 1,000 Lux for more

than a minute.

3. Never touch the drum surface with bare hands. When the drum surface istouched with a finger or becomes dirty, wipe with a dry cloth or clean with

wet cotton. Wipe with a dry cloth after cleaning with wet cotton.

4. Never use alcohol to clean the drum; alcohol dissolves the drum surface.

5. Store the drum in a cool, dry place away from heat.

6. Take care not to scratch the drum as the drum layer is thin and is easily

damaged.7. Never expose the drum to corrosive gases such as ammonia gas.

8. Always keep the drum in the protective sheet when inserting or pulling the

drum unit out of the copier to avoid exposing it to bright light or direct sun-

light. This will protect the drum from light fatigue.

9. Before removing the drum, place a sheet of paper under the drum to

catch any falling toner.

10. Dispose of used drums according to local regulations.

11. Perform the following adjustment when a new drum is installed.1. Vsg adjustment (SP#33).

2. Light sensor adjustment (VR102 on the main board).

31 December 1992 SERVICE REMARKS

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6.2 CHARGE CORONA

1. Clean the charge corona wire by turning the gear of the wire cleaner padsclockwise until it stops, then turn the gear counterclockwise and the wire

cleaner pads move to the original position.The wire can also be cleaned with a blower brush. If the wire is cleaned

with a dry cloth, make sure that the wire does not become stretched. Donot use sand paper or a solvent.

2. Do not touch the corona wire and the grid wires with oily hands. Oil stainsmay cause uneven image density on copies.

3. Make sure that the corona wire is correctly positioned between the

cleaner pads and that there is no foreign material (iron filings, etc.) on thecasing.

4. When adjusting the charge corona current, always use the current meas-

uring drum.

5. Clean the grid wires with a dry cloth.

6.3 OPTICS

1. Clean the exposure glass with water or alcohol.

2. Clean the fiber optics array with lens paper or silicone cloth.

SERVICE REMARKS 31 December 1992

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6.4 DEVELOPMENT

1. Be careful not to nick or scratch the development roller.

2. Clean the drive gears after removing used developer.

3. Initial conditioning (SP#5) and toner density sensor voltage adjustment

(SP#35) are necessary when the developer is replaced.

4. Never loosen the paint locked screw securing the center of the toner car-tridge holder and the paint locked screw securing the doctor blade.

5. Dispose of used developer according to local regulations.

6.5 TONER SUPPLY

1. Clean the image density sensor with a dry cloth or a blower brush.

2. Vsg adjustment is required in the following cases:

a) When the image density sensor is replaced

b) When the main board is replaced

c) When the drum has been replaced and Vsg is out of specification

d) When there have been problems with toner supply and Vsg is out of

specification

6.6 TRANSFER AND SEPARATION

1. Clean the corona wires with a blower brush. If the wires are cleaned with

a dry cloth, make sure that the wire does not become stretched.

2. When adjusting the corona current, always use the drum currentmeasuring drum.


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6.12 OTHERS

1. When replacing the main board, if the RAM on the old main board is stillusable, remove and place it on the new main board. Then, install the new

main board in the copier.2. After installing the new main board with a new RAM, clear the RAM mem-

ory by performing the following procedure. (Do not clear RAM memory if

you have placed the old RAM on the new main board.)

1) Turn on the main switch.

2) Turn on the DPS101-5 and 101-8 on the main board.

NOTE: The Call Service ( ), Misfeed ( ), Used Toner Tank ( )

and Add Toner ( ) indicators will blink. This is to confirm

that the correct mode has been selected.

3) Press the Plus or Minus key to display "9" on the Copy Counter

indicator.

4) Press the Copy Exit Way key to clear.

5) Turn off the DPS101-5 and 101-8.

6) Clean the optics, sensors, and inside of the copier if necessary.

7) Replace the developer with new one.

CAUTION: Since the developer counter (SP64) for the developercounter correction has been cleared, the olddeveloper cannot be used.


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8) Perform the following SP modes in sequence.

(1) SP#13: Pheripherals Installation (If pheripherals are installed)

(2) SP#80 ~ SP#85, SP#90 ~ SP#95: Cut Error Corrections (If the roll

feeder is installed)

(3) SP#5: Initial Conditioning

(4) SP#35: Toner Density Sensor Adjustment

(5) SP#33: Vsg Adjustment

(6) SP#37: ADS Reference Voltage Adjustment

(7) Light Sensor Adjustment (by using VR102 on the main board)(8) SP#26 or SP#27: Registration Adjustment Manual Feed and Sheet

Feeder

(9) SP#78 or SP#79: Registration AdjustmentRoll Feeder


(10) SP#76 or SP#77: Cut Length AdjustmentSynchro Cut Mode


(11) SP#88 or SP#89: Cut Length AdjustmentPreset Cut Mode


3. When replacing a sensor, do not overtighten the screws. This may dam-

age the sensor.

SERVICE REMARKS 31 December 1992

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SECTION 5

REPLACEMENT AND ADJUSTMENT

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1. EXTERIOR COVERS

1.1 LEFT SIDE COVER REMOVAL

1.1.1 Middle Left Cover1. Open the original feed unit [A].

2. Remove the middle left cover [B] (2 screws, loosen 2 screws [C]).

1.1.2 Top Left Cover

1. Open the original feed unit.

2. Remove the top left cover [D] (2 screws, loosen 2 screws [E]).

1.1.3 Front Left Cover1. Open the original feed unit, middle unit [F] and toner cartridge cover [G].

2. Remove the middle left cover (2 screws, loosen 2 screws).

3. Remove the front left cover [H] (4 screws, loosen 2 screws [I]).

1.1.4 Left Horizontal Cover1. Remove the front left cover. (See Front Left Cover Removal.)

2. Remove the left horizontal cover [J] (5 screws).

[A]

[D]

[C]

[E]

[B]

[C] [F]

[G]

[H]

[I]

[J]

31 December 1992 EXTERIOR COVERS

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1.2 RIGHT SIDE COVER REMOVAL

1.2.1 Middle Right Cover1. Open the original feed unit [A].

2. Remove the middle right cover [B] (2 screws, loosen 2 screws [C]).

1.2.2 Top Right Cover1. Open the original feed unit.

2. Remove the top right cover [D] (2 screws, loosen 2 screws [E]).

1.2.3 Front Right Cover1. Open the original feed unit, middle unit [F] and toner cartridge cover [G].

2. Remove the middle right cover (2 screws, loosen 2 screws).

3. Remove the front right cover [H] (4 screws, loosen 2 screws [I]).

1.2.4 Right Horizontal Cover1. Remove the front right cover. (See Front Right Cover Removal.)

2. Open the main board bracket [J] (1 screw).

3. Remove the right horizontal cover [K] (5 screws).

[D]

[A]

[C]

[E]

[B]

[C]

[K]

[J]

[I]

[F]

[G]

[H]

EXTERIOR COVERS 31 December 1992

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2. OPTICS

2.1 EXPOSURE GLASS REMOVAL


2. Remove the two exposure glass holders [A]. (2 hexagon head screwseach.)

3. Remove the exposure glass [B].

NOTE: When reinstalling the exposure glass, make sure that thebeveled edge [C] of the exposure glass must be positioned

upward as shown.

[A]

[B][A]

[C]

31 December 1992 OPTICS

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2.2 FIBER OPTICS ARRAY REMOVAL/CLEANING

1. Remove the exposure glass. (See Exposure Glass Removal.)

2. Remove the light sensor board [A] (1screw and 1 connector).

3. Remove the two shoulder screws [B] and washers [C] securing the fiberoptics unit [D].

4. Rotate the fiber optics unit forward and lift it out of the machine.

5. Remove the pattern shutter solenoid unit [E] from the fiber optics unit

(2 screws and 1 connector).

NOTE: Do not miss the spring [F] on the unit.

6. Clean the fiber optics with a soft cloth.

[A][B]

[C]

[D]

[E]

[F]

[B]

[C]

OPTICS 31 December 1992

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2.3 EXPOSURE LAMP/EXPOSURE LAMP HEATERREPLACEMENT

–To Remove–1. Remove the middle left cover, front left cover and left horizontal cover.

(See Left Horizontal Cover Removal.)

2. Remove the middle right cover. (See Middle Right Cover Removal.)

3. Close the middle unit.


5. Remove the left lamp socket bracket [A] (1 screw and 1 shoulder screw).

6. Disconnect the 2P [B] and 3P [C] connectors.

7. Remove the left lamp holder [D] (2 screws).

8. Slide the exposure lamp [E] and exposure lamp heater [F] to the left and

remove them from the machine.

9. Remove the heater from the lamp.

[C]

[A]

[B]

[D]

[E] [F]

[F]

[E]

31 December 1992 OPTICS

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–To Install–10. Place the exposure lamp heater [A] on the exposure lamp [B] as shown.

NOTE: The heater fits over the white part [C] of the lamp. Make sure

that the heater does not cover the lamp aperture [D].

11. Insert the exposure lamp together with the lamp heater through the

cutout, then connect the right lamp terminal [E] by pushing the lamp.NOTE: a) Do not touch the aperture on the exposure lamp.

b) Make sure that the aperture faces up and to the rear and that

the heater faces down and to the front.c) Make sure that the right lamp terminal fits into the socket [F].

12. Reinstall the left lamp holder [G] (2 screws) and left lamp socket bracket

[H] (2 screws).

NOTE: Make sure that the left lamp terminal fits into the socket.

13. Connect the 2P and 3P connectors and reassemble the machine.

14. Perform the light sensor adjustment. (See Light Sensor Adjustment.)

[B] [A]

[D]

[C]

[G]

[H]

[E]

[F]

OPTICS 31 December 1992

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3. DRUM

3.1 DRUM REPLACEMENT

–To Remove–1. Open the middle unit and press the cleaning unit release lever [A] to the

rear.

2. Remove the pick-off pawl unit [B] with ID sensor [C] (2 knob screws and 2

connectors).


4. Open the main board bracket (1 screw).

5. Remove the ground screw [D] securing the cover plate [E].

6. Move the cover plate slightly to the right and remove it.

[A] [B][C]

[D][E]


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7. Support the drum [A] with your left hand and turn the drum lock knob [B]counterclockwise with your right hand.

NOTE: Never touch the drum surface with your bare hands. Use a sheet

of paper between your hand and the drum to avoid contact.

8. Remove and hold the drum with your hand.

NOTE: When removing the drum, take care not to strike it against any

objects.

[B]

[A]

[A]


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–To Install–1. Remove the left [A] and right [B] drum holders from the back side of the

main board bracket [C].

2. Disconnect the transfer [D] and separation [E] connectors.

3. Lift the T/S corona unit [F] and disconnect the ground wire connector [G].

4. Remove the T/S corona unit.

5. Place the left and right drum holders on the main frame as shown.

NOTE: "A" is written on the left drum holder and "B" is written on theright drum holder.

[C][B]

[A]

[D][E]

[F]

[G]

[A]

[B]


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6. Put the new drum [A] with the drum protective sheet [B] on the drumholders [C] as shown.

NOTE: The seals [D] on the drum protective sheet must be beneath thedrum.7. Close the middle unit [E] and turn the drum lock knob [F] clockwise until it

locks.

NOTE: To avoid drum damage, do not open the middle unit beforetightening the drum lock knob.

8. Open the middle unit.

9. Reinstall the T/S corona unit [G] (2 connectors and 1 ground wireconnector).

NOTE: When reinstalling the T/S corona unit, make sure that the four

edges [H] of the unit bottom plate are properly mounted on theleft [I] and right [J] support brackets of the copier frame, as

shown.

[E]

[F]

[C]

[D]

[C]

[B][A]

[H]

[I]

[G]

[H]

[J]


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10. Reinstall the cover plate [A] (1 ground screw).

NOTE: The right positioning pin [B] is inserted in the hole [C] while the

left positioning pins [D] are inserted in the holes [E].

11. Reinstall the pick-off pawl unit [F] (2 knob screws and 2 connectors).

NOTE: Make sure the two positioning pins [G] are inserted in the two

holes [H] of the pick-off pawl unit.12. Pull the cleaning unit release lever to the front side until it locks.

13. Remove the drum protective sheet.

14. Close the main board bracket (1 screw) and the middle unit.

15. Perform the Vsg adjustment by SP#33. (See Vsg Adjustment.)

NOTE: Initial conditioning (SP#5) is not necessary. (It is necessary only

when the developer is replaced.)

16. Perform the light sensor adjustment. (See Light Sensor Adjustment.)

[E]

[D]

[B]

[C]

[A]

[F]

[H]

[G]


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4. CORONA

4.1 CHARGE CORONA WIRE AND GRID WIREREPLACEMENT

1. Remove the drum. (See Drum Replacement.)

NOTE: Cover the drum with paper to prevent the drum from being

exposed to light.

2. Disconnect the ground lead [A] and remove the "+" shoulder screw [B]securing the right charge corona cover [C].

3. Remove the right charge corona cover.

4. Move the charge corona unit [D] slightly to the right. Then, take it out

downward through the drum opening.

[D]

[C][A]

[B]

CORONA 31 December 1992

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11. Reinstall the wire cleaner [A].

NOTE: Make sure that the corona wire [B] is positioned between the

cleaner pads [C].

12. Reinstall the endblock-covers and grid wire terminal.

13. Install 4 new grid wires [D] and grid holders [E].NOTE: 1) Make sure that the wires are correctly placed on the eight

slots [F] and in the eight holes [G].

2) Make sure that the wires are all straight and not crossed, as

shown.3) Handle the new wires by the ends only. Oil and chemicals

from your hands will deteriorate the wires.

4) Do not bend the wires. This can result in an uneven charge.

14. Reinstall the charge corona unit.

NOTE: Make sure that the charge corona unit is set properly, and the

grid wires and charge corona wire are positioned facing the drum

surface.

15. Reinstall all the units and covers.

[A]

[C] [B]

[C]

OK

NG

[G]

[F]

[D] [E]


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4.3 DRUM CURRENT ADJUSTMENT

NOTE: a) The drum currents vary with environmental conditions such ashumidity and atmospheric pressure. Generally it is not necessary

to adjust the drum currents because they have already been

adjusted for a wide range of environments at the factory.b) Drum current adjustment is necessary whenever the power packs

are replaced; adjustment may also be necessary to correct

problems with paper separation, incomplete toner transfer, or

image density.

c) Make sure that the main switch is turned off when you change therange on the digital multimeter. If it is not, the multimeter may be

damaged.

4.3.1 Preparation1. Turn off the main switch and remove the following parts:

• Left middle cover

• Right middle cover

• Pick-off pawl unit (See Drum Replacement)

• Cover plate (See Drum Replacement)

• Drum (See Drum Replacement)

2. Clean or replace each corona wire and clean the corona units.

NOTE: When the wire is cleaned with a dry cloth, make sure that the

wire does not become stretched.


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NOTE: Do steps 3 and 4 before adjusting the transfer corona current or

separation corona current.

3. Install the current measuring drum [A].

NOTE: 1) Position the connectors [B] to the right side as shown.

2) The harness leads should be positioned as close as possible

to the development roller [C] so that they are not in the way of

any corona units.4. Connect the five harness leads[D] of the current measuring drum to the

positive harness lead [E] of the multimeter [F], then connect the negativeharness lead [G] of the multimeter to the copier frame as shown.


[A]

[B][C]

[G]

[F]

[E][D]

31 December 1992 CORONA

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4.3.2 Charge Corona Current Adjustment

ADJUSTMENT STANDARD Adjusting VR

DC 1.1 ± 0.01 mA VR101

1. Turn off the main switch.

2. Disconnect the Charge/Grid/Bias power pack connector [A] from the

charge corona terminal [B].3. Select the dc 2 mA range on the digital multimeter.

4. Connect the multimeter leads as shown.


6. Turn on DPS101-7 and 101-8 on the main board to enter the output

check mode.

7. Enter output check No 24. (See output Check Mode Access Procedure.)

8. Press the Copy Exit Way key to turn on the charge corona.

9. Enter output check No 34.

10. Press the Plus (+) key until "8" is displayed in the Copy Counter indicator.Then, press the Copy Exit Way key to apply the grid voltage (–940 volts).

11. Adjust the charge corona current to 1.1 ± 0.01 mA by turning VR101 on

the Charge/Grid/Bias power pack [C].

12. Turn off DPS101-7, 101-8 and the main switch.

[A]

[B]

[C]

VR101


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4.3.3 Transfer Corona Current Adjustment


Low (normal): DC –120 ± 5 µA T1

High: DC –250 + 5/–10 µA T2

1. Turn off the main switch.2. Remove the lower rear cover [A] (5 screws) and upper rear cover [B] (4

screws).

3. Select dc 200 µA on the digital multimeter.



check mode.6. Enter output check No 25. (See Output Check Mode Access Procedure.)

7. Press the Copy Exit Way key to turn on the low (normal) transfer corona.

[A]

[B]


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8. Adjust the low (normal) transfer corona current to –120 ± 5 µA by turning

T1 on the Transfer/Separation power pack [A].


10. Select dc 2 mA on the digital multimeter.



13. Press the Copy Exit Way key to turn on the high transfer corona.14. Adjust the high transfer corona current to –250 + 5/–10 µA by turning T2

on the Transfer/Separation power pack.

15. Press the Copy Exit Way key and turn off DPS101-7, 101-8 and the main

switch.

[A]


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4.3.4 Separation Corona Current Adjustment


AC 220 ± 5 µA D1

DC –10 + 0.5 µA D2

1. Turn off the main switch.2. Remove the lower rear cover [A] (5 screws) and upper rear cover [B] (4

screws).

3. Select ac 2 mA on the digital multimeter.



check mode.6. Enter output check No 27. (See Output Check Mode Access Procedure.)

7. Press the Copy Exit Way key to turn on the ac current of the separation

corona.

[A]

[B]


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8. Adjust the ac separation corona current to 220 ± 5 µA by turning D1 on

the Transfer/Separation power pack [A].


10. Select dc 200 µA on the digital multimeter.



13. Press the Copy Exit Way key to turn on the dc current of the separationcorona.

14. Adjust the dc separation corona current to –10 + 0.5 µA by turning D2 on

the Transfer/Separation power pack.

15. Press the Copy Exit Way key and turn off the DPS101-7, 101-8 and the

main switch.

[A]


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5. DEVELOPMENT

5.1 DEVELOPER REMOVAL

NOTE: When replacing the developer,make sure that the drum

is must be installed.


2. Open the main board bracket (1 knob screw).

3. Open the middle unit and lay a sheet of A2 paper (C size) [A] on the rightside of the paper entrance section as shown.

4. Remove the cover plate [B] (1 ground screw).

5. Activate the lower safety switch.

6. Close the main board bracket (1 knob screw).

7. Open the developer exit cover [C] (1 screw).

CAUTION: When opening the cover, the developer right away will fallon the paper.

[A]

[C]

[B]


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9. Turn on the DPS101-7 and 101-8 on the main board to enter the output

check mode.

10. Enter output check No.1 to turn on the development motor. (See Output

Check Mode Access Procedure.)

The development rollers will start turning and the remaining developer [A]

inside the development unit will pour out onto the paper [B]. After about15 minutes, nearly all of the developer will be out of the development unit.

NOTE: To remove all the developer, lift the left side [C] of the copier asshown.

11. Press the Copy Exit Way key to turn off the development motor.

12. Pour the old developer into a plastic bag for disposal.

13. Reinstall the all covers except the middle right cover.

14. Install the new developer.

NOTE: After installing the new developer, perform the Initial

Conditioning (SP#5) and Toner Density Sensor VoltageAdjustment (SP#35).

[B]

[A]

[C]


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5.2 TONER DENSITY SENSOR VOLTAGE ADJUSTMENT


4 ± 0.1 V VR105 SP#35

NOTE: This adjustment must be done only when the new developer is

installed.

1. Remove the middle right cover.


3. Turn on DPS-101-8 on the main board to enter the SP mode.

4. Select SP#35. (See Service Program Mode Access Procedure) and

press the Copy Exit Way key.

5. Adjust the toner density sensor voltage to 4 ± 0.1 V by turning VR105 on

the main board [A]. (The voltage will be displayed on the operation panel.)

6. Press the Copy Exit Way key and turn off DPS101-8 and the main switch.

[A]


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5.3 DEVELOPMENT FILTER REMOVAL




4. Remove the development filter [A] (1 screw).

[A]


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5.4 DEVELOPER DISTRIBUTION ADJUSTMENT

NOTE: If uneven image density appears on copies or the service call

code "Ed" is displayed, this adjustment is required.1. Open the original feed unit.

2. Open the toner cartridge cover and take out the toner cartridge.

3. Check if that the developer moves to the right or left.

If yes, proceed with the following steps.

4. Adjust and correct the machine level.

5. Remove the original exit guide [A] (2 screws).

6. Turn the left [B] and right [C] eccentric cams clockwise or

counterclockwise.

If the developer moves to the right, turn the left and right eccentric cams

clockwise ("+" direction).

If the developer moves to the left, turn the left and right eccentric cams

counterclockwise ("– " direction).

7. Check the copy quality and machine condition.

[A]

[B]

[C]


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5.5 TONER DENSITY SENSOR REPLACEMENT


2. Open the toner cartridge cover and take out the toner cartridge.

3. Remove the development filter. (See Development Filter Removal.)



6. Remove a screw [B] and push down the harness bracket [C].

7. Remove the toner cartridge holder [D] (Right......2 screws,

Left.........loosen 1 screw).

8. Remove the toner density sensor holder [E] (2 screws and 1 connector).

9. Remove the toner density sensor [F] from the holder.

NOTE: After replacing the toner density sensor, replace the developer,perform Initial Conditioning (SP#5) and Toner Density Sensor

Voltage Adjustment (SP#35).

[E]

[D]

[F]

[C]

[B]

[A]


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5.6 DEVELOPMENT BIAS VOLTAGE ADJUSTMENT


DC –200 ± 2 V VR301

1. Remove the middle right and left cover.

2. Set the multimeter range to dc 1500 V and connect the multimeter leadsas shown.



check mode.

5. Enter output check No. 29. (See Output Check Mode Access Procedure.)

6. Press the Plus (+) key until "9" is displayed in the Copy Counter indicator.

Then, press the Copy Exit Way key to apply the bias voltage.

7. Adjust the bias voltage to –200 ± 2 V by turning VR301 on theCharge/Bias/Grid power pack [A].

8. Press the Copy Exit Way key and turn off DPS101-7, 101-8, and the main

switch.

[A]


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5.7 TONER SUPPLY CLUTCH LUBRICATION

1. Remove the C/B/G power pack unit [A] (4 screws, 3 terminals, and 4

connectors) and the development motor unit [B] (5 screws).

2. Remove the toner supply clutch [C] (2 Allen screws) and take it apart.

3. Clean each part and apply grease.

[A]

[B]

[C]


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5.8 DOCTOR GAP ADJUSTMENTADJUSTMENT STANDARD Both ends.......0.5 ± 0.05 mm

Center............0.35 ± 0.05 mm

CAUTION: The doctor gap was adjusted at the factory using specialtools. Therefore, this adjustment is not normally requiredin the field. This adjustment is required only when thedevelopment roller, mixing auger or paddle roller is

replaced.

1. Remove the developer. (See Developer Replacement.)


3. Remove the fiber optics array unit. (See Fiber Optics Array Removal.)

4. Remove the exposure lamp. (See Exposure Lamp Replacement.)

5. Open the toner cartridge cover.


7. Remove the seven sets of guide rollers [B] (2 screws each).

8. Remove the toner density sensor harness [C] from the cover plate clamp

[D] and remove the upper [E] and lower [F] cover plates (3 screws).

[A] [B]

[C]

[D]

[E]

[F]


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9. Remove the front exposure glass holder [A] (4 screws).

NOTE: Do not loosen the two paint locked screws securing the holder.

10. Loosen the two screws [B] securing the doctor blade [C].11. Insert the 0.35 mm DG gauge [D] in the center position of the doctor gap.

12. Insert the 0.5 mm DG gauge [E] in the rear position of the doctor gap.

13. While pressing down the doctor blade directly between the two gauges,

tighten the rear screw [F].

14. Remove the 0.5 mm DG gauge and reinsert it in the front position of the

doctor gap.15. While pressing down the doctor blade directory between two gauges,

tighten the front screw [G].

16. Remove the two DG gauges and reassemble the machine.

[A]

[B]

[C]

[G]

[F][E]

[D]


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5.9 PHOTOCONDUCTOR GAP ADJUSTMENT

ADJUSTMENT STANDARD 1.0 ± 0.1 mm

CAUTION: The photoconductor gap was adjusted at the factory usingspecial tools. Therefore, this adjustment is not normallyrequired in the field. This adjustment is required only whenthe development roller, mixing auger or paddle roller isreplaced.

1. Follow steps1 to 9 of the Doctor Gap Adjustment.

2. Remove the doctor blade [A] (2 screws and 1 connector).3. Remove the drum and mount a used drum in its place.

NOTE: During this adjustment, the drum will be in contact with the

thickness gauge. Therefore, we recommend you use a used

drum for test.

4. Open the main board bracket [B] (1 screw).

NOTE: Mark the original position of the magnet adjusting plate [C]before removing the plate.

5. Remove the magnet adjusting plate [C] (2 screws).

6. Remove the lamp regulator/CBG power pack assembly [D] (4 screws, 3

terminals, and 4 connectors).

[A]

[C] [B]

[D]


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7. Remove the front left cover [A], and remove the development motor [B] (5

screws).

8. Loosen the adjustment screws [C][D] at both ends of the developmentroller [E].

9. Insert the 1.0 mm thickness gauge [F] between the drum and thedevelopment roller. Set the gap to the adjustment standard while turningthe front [G] and rear [H] positioning gears clockwise or counterclockwise

and tighten the adjustment screws.

10. Reinstall the all units and covers.

NOTE: After reinstalling the doctor blade, adjust the doctor gap.

[B][A]

[C]

[F]

[H]

[D][E]

[G]


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9. Remove the front exposure glass holder [A] (4 screws).

NOTE: Do not loosen the two paint locked screws securing the holder.

10. Remove the doctor blade [B] (2 screws and 1 connector).11. Take out the toner cartridge.

12. Remove a screw [C] and push down the harness bracket [D].

13. Remove the toner cartridge holder [E] (Right: 2 screws, Left: Loosen 1

screw).

[A]

[B]

[E][C][D]


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14. Remove the lamp regulator/CBG power pack assembly [A] (4 screws, 3terminals, and 4 connectors).

15. Remove the front left cover [B] and remove the development motor [C] (5screws).

16. Disconnect the bias terminal [D] (1 screw).

17. Remove the development drive gear [E], left positioning gear [F], left

positioning plate [G] and two bearings [H] (1 C-ring).

18. Remove the auger gear [I] (2 E-rings and 1 bushing).

[A]

[C]

[B]

[H]

[G][F]

[E]

[D]

[I]


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NOTE: Mark the original position of the magnet adjusting plate [A]

before removing the plate.

20. Remove the magnet adjustment plate (2 screws).

21. Remove the right positioning gear [B] (1 screw and 1 spacer).

22. Remove a bushing [C] and E-ring [D].

23. Remove the three back spill plates [E] (1 screw).

24. Remove the mixing auger [F].

25. Remove the mixing separator casing [G] (4 screws).

[B]

[C]

[A]

[D]

[E]

[G][F]


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26. Peel off the side seal and pull out the development roller [A].

27. After replacing the development roller, put the side seal at the same

location on the new roller.

28. Adjust the doctor gap and the photoconductor gap. (See Doctor Gap

Adjustment and Photoconductor Gap Adjustment.)

[A]


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5.11 PADDLE ROLLER REPLACEMENT

1. Remove the development roller. (See Development Roller Replacement.)

2. Remove the paddle roller bearing [A] and drive gear [B].

3. Remove the right [C] paddle roller shaft (1 E-rings, 1 spacer, 1 bushing)and replace the paddle roller [D].

4. Adjust the doctor gap and photoconductor gap. (See Doctor Gap

Adjustment and Photoconductor Gap Adjustment.)

[A] [B]

[D] [C]


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6. CLEANING

6.1 CLEANING BLADE REPLACEMENT

1. Remove the drum. (See Drum Replacement.)

NOTE: Cover the drum with paper to prevent the drum from being exposed

to light.

2. Place a sheet of A1 size (D size) paper [A] on the paper transport section.

3. Pull up on the plate spring [B] and remove the cleaning blade [C].

4. Pull the cleaning blade release lever.

5. Install the new blade.

[A]

[C]

[B]

31 December 1992 CLEANING

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6.2 USED TONER REMOVAL

1. Remove the middle right cover and open the main board [A] (1 screw).

2. Open the used toner tank cover [B] (1 screw).

3. Disconnect the toner overflow sensor connector [C].

4. Turn the toner collection lever [D] counterclockwise and pull out the used

toner tank [E].

5. Take off the toner collection cap [F] and pour the used toner into a plastic

bag.

6. Clean the toner overflow sensor [G] with a blower brush or equivalent.

[D]

[C][E]

[B]

[A]

[F][G]


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7. QUENCHING

7.1 QUENCHING LAMP CLEANING

1. Remove the charge corona unit. (See Charge Corona Wire Replacement.)

2. Clean the quenching lamp [A] with a blower brush [B].

[B]

[A]

31 December 1992 QUENCHING

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7.2 QUENCHING LAMP REPLACEMENT

1. Remove the middle left and middle right covers.2. Remove the left and right horizontal covers. (See Left and Right

Horizontal Cover Removal.)

3. Remove the cooling fan motor [A] (2 screws and 1 connector).

4. Remove the press roller plate [B] (4 screws).

5. Remove the 4th press rollers [C] (7 sets ....... 2 screws each).

6. Remove the quenching lamp unit [D] (4 screws).

7. Remove both quenching lamps from the quenching lamp bracket (4

screws each).

[C]

[D]

[A]

[B]

QUENCHING 31 December 1992

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8. PAPER FEED

8.1 PAPER FEED CLUTCH LUBRICATION


2. Remove the left inner cover [A] (7 screws).

3. Remove the clutch collar [B] (Loosen 2 allen screws).

4. Remove the clutch sleeve [C] and spring clutch [D].

5. Clean and lubricate the spring clutch with Mobil Temp. 78.

[A]

[B]

[C][D]

31 December 1992 PAPER FEED

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8.2 1ST/2ND FEED SENSOR REPLACEMENT

1. Remove the middle right cover.2. Remove the upper guide plate [A] (2 screws).

3. Remove the 1st feed sensor bracket [B] with the paper stopper solenoid[C] (2 screws and 2 connectors).

4. Remove the 1st feed sensor [D] from the bracket.

5. Remove the 2nd feed sensor bracket [E] (1 screw and 1 connector).

6. Remove the 2nd feed sensor [F] from the bracket.

[A]

[C]

[B][D]

[F] [E]

PAPER FEED 31 December 1992

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8.3 REGISTRATION SENSOR REPLACEMENT


2. Remove the cover plate [A] (1 screw).

3. Remove the registration sensor bracket [B] (2 screws and 1 connector).

4. Remove the sensor [C] from the bracket (2 screws).

[A]

[B]

[C]

31 December 1992 PAPER FEED

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13. Open the exit guide unit [A].

14. Remove the left [B] and right [C] screws securing the exit guide unit.

15. Remove a ground screw [D].

16. Disconnect the two connectors [E].

17. Slide the exit guide unit to the left (rear view) and take it out from the

copier frame.

18. Loosen the screw [F] securing the tension sprocket [G] and remove the

paper exit drive chain [H].

19. Remove the two screws [I and J] securing the paper exit unit [K].

20. Remove a ground screw [L] and toothed washer [M].

[A]

[B]

[E]

[D]

[C]

[J]

[K]

[G]

[F][H]

[G] [F] [M] [L]

[I]

31 December 1992 FUSING

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21. Disconnect the two connectors [A] and remove the paper exit unit [B].

22. Remove the lower rear cover [C] (5 screws) and upper rear cover [D]

(4 screws).

23. Remove the small left [E] and right [F] covers (2 screws each).


25. Loosen the two screws [G] securing the tension bracket [H].

26. Remove the screw [I] securing the fusing unit.

[A]

[B][E]

[C]

[D]

[F]

[H]

[G]

[I]

FUSING 31 December 1992

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28. Remove the fusing drive chain [A] from the hot roller gear [B].

29. Remove the fusing lamp connector [C].

30. Remove the hot roller thermistor connector [D] and the pressure roller

thermistor connector [E].

31. Remove the two screws [F and G] securing the fusing unit [H].

32. Pull out the fusing unit.

[D]

[E]

[G]

[H]

[F] [C]

[A]

[B]


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9.2 FUSING LAMP REPLACEMENT

1. Remove the fusing unit. (See Fusing Unit Removal.)

2. Disconnect the lamp connector [A].

3. Remove the right lamp holder [B] (1 screw).

4. Remove the 2 wire clamps [C] from the left fusing frame (1 screw each).

5. Remove the left stopper [D] (1 screw).

6. Remove the harness cover [E] (2 screws).

7. Remove the left lamp holder [F] (1 screw).

8. Remove the lamp connector [G].

9. Slide out the fusing lamp [H].

10. Carefully slide in the new fusing lamp, lead wire first. Make sure that the

lead wire feeds straight into the hot roller.

[C]

[H]

[E]

[F]

[D]

[C]

[G]

[A]

[B]


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9.3 HOT ROLLER/PRESSURE ROLLER REPLACEMENT


2. Remove the fusing lamp. (See Fusing Lamp Replacement.)

3. Remove the fusing upper cover [A] (4 screws) and the exit guide plate [B](4 screws).

4. Remove the left and right pressure springs [C,D].

5. Remove the entrance guide plate [E] (2 screws).

6. Remove the right stopper [F] (1 screw).

7. Remove two C rings [G], the gear [H], two bushings [I], and two bearings[J].

8. Slide the hot roller [K] to the right and pull it out.

9. Remove two stoppers [L] (1 screw each), then, remove the pressure roller

[M].

[J]

[F]

[J][I]

[G]

[H][K]

[C]

[G]

[I]

[D]

[A]

[B]

[M]

[L]

[L]

[E]


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9.5 HOT ROLLER/PRESSURE ROLLER THERMISTORREPLACEMENT


2. Remove the fusing upper cover (4 screws).3. Take the hot roller thermistor wire out from the clamps [A] (3 clamps, 1

screw each) and remove the hot roller thermistor holder [B] (2 screws).

4. Remove the hot roller thermistor [C] from the holder (2 screws and 1

spring).

5. Remove the left and right pressure springs.

6. Remove the fusing unit lower cover [D] with the exit guide plate [E] (4screws, 1 wire clamp [F]).

7. Remove the pressure roller thermistor holder [G] (2 screws, 1 wire clamp

[H] and bushing [I]).

8. Remove the pressure roller thermistor [J] from the holder (2 screws and

1 spring).

[A] [A]

[B]

[C]

[G]

[H] [F] [I]

[J][D]

[E]


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9.6 FUSING PRESSURE DISTRIBUTION ADJUSTMENT


2. Remove the hot roller and the pressure roller [A]. (See Hot

Roller/Pressure Roller Replacement.)

3. Slide the pressure roller shaft [B] out from the pressure roller.

4. Loosen the four Allen screws on each of the adjustment bearings [C,D].

5. Set the bearings in the desired positions and tighten the Allen screws.

[A]

[C][D] [B]


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10. COPY QUALITY ADJUSTMENT

– General Information –

Image density is affected by the following factors:

(1) Light Intensity

(2) Bias Voltage

(3) Toner Density

(4) Grid Voltage(5) Charge Corona Current

The items listed above must be kept in balance to maintain correct image

density.

In the field, image density should be adjusted first by changing the lightintensity. (Adjust the light sensor voltage.) If results are unsatisfactory,the bias voltage can be changed. Also, if requested by the customer, theoverall image density can be changed by changing the toner density.Normally, this should be kept at the normal position (factory setting).

The grid voltage and charge corona current are carefully adjusted at the fac-tory. Any adjustment out of the adjustment standards will result in over toning,

toner scattering, dirty background, or light image density problems. The grid

voltage and charge corona current adjustment should be done only when re-

placing the Charge/Bias/Grid power pack, or to correct certain problems withimage density after checking all other possible causes.

31 December 1992 COPY QUALITY ADJUSTMENT

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10.1 LIGHT SENSOR ADJUSTMENT

When:

1. Every Call

2. When replacing the following part• Exposure lamp • Light sensor

• Drum • RAM on the main board

Purpose: To maintain the correct light intensity.

Adjustment

Standard:

Level 2 (10%) of the 9 step gray scale on the OS-

A1 chart should be slightly visible when the 7th

manual image density level is selected.

Perform: Turn VR102 on the main board.

How: Change the light sensor voltage.


2. Clean the following parts:

Item No. Section Method

(1)Optics (Exposure glass, fiberoptics array)

Damp cotton and drysoft cloth

(2)ID sensor Dry cloth or blower

brush

(3)Corona wires (charge, transfer

and separation) and casing.

Dry cloth

(4)

QL, PTL Dry cloth or blower

brush


4. Make several copies at manual image density level 7 with OS-A1 chart.

5. Confirm that level 2 (10%) of the 9 step gray scale is slightly visible on thecopy. If the copy image density is not correct, proceed with the following

step.6. Turn VR102 on the main board clockwise or counterclockwise.

If the image density is too dark: Turn VR102 clockwise.

If the image density is too light: Turn VR102 counterclockwise.

7. Confirm that image density is within the adjustment standard.

COPY QUALITY ADJUSTMENT 31 December 1992

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10.2 IMAGE BIAS ADJUSTMENT

When:

1. The image is blurred even though the image

density in black solid areas is acceptable.

2. Dirty background, where the problem is notcaused by excess toner and cannot be solved

by adjusting the light sensor voltage.

Purpose: To improve the copy image.

Perform: SP #19

How:Change the development bias voltage for image

density control by SP #19.

Data (SP #19) 0 1 2 3 4

Change of biasvoltage (volts)

±0 +40 +20 – 20 – 40

Image Density Normal Darkest Darker Lighter Lightest

1. Make a copy after adjusting the light intensity.

2. If the image is blurred:

Decrease bias voltage by one step and readjust light intensity.

If the background is dirty:

Increase bias voltage by one step and readjust light intensity.


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10.3 TONER DENSITY ADJUSTMENT

When:Customer wants to change the overall image

density of the copies.

Purpose: To change toner concentration insidedevelopment unit.

Perform: SP #18

How:Change the development bias voltage for the ID

sensor pattern by SP #18

10.4 TONER SUPPLY RATIO SELECTION

When:The factory setting for toner supply amount is not

appropriate for the type of original in use.

Purpose: To adjust the toner supply amount.

AdjustmentStandard:

15% (Factory Setting)

Perform: SP #17

How:Change the toner supply solenoid on period bySP #17.


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10.5 ID SENSOR VOLTAGE (Vsg) ADJUSTMENT

When:

1. Check Vsg at every call, and adjust Vsg if it is not withinthe adjustment standard.

2. At replacement of the following parts: • ID sensor • Drum • RAM on the main board.3. A toner supply problem occurs.

Purpose: To make sure that the ID sensor works correctly.

Adjustment

Standard:

Vsg = 4.0 ± 0.1 volts

Perform: SP #33

How:Change the light intensity of the ID sensor LED by VR104.The Vsg voltage is displayed on the operation panel.

1. Turn off the main switch and clean the following parts:

Item No. Section Method

(1)Optics (exposure glass, fiber opticsarray)

Damp cotton and dry soft cloth

(2) ID sensor Dry cloth or blower brush

(3)Corona wires (charge, transfer, andseparation) and casing

Dry cloth

(4) QL, PTL, Dry cloth or blower brush



4. Turn on DPS101-8 on the main board to enter the SP mode.

5. Select SP#33 (See Service Program Mode Access Procedure) and press

the Copy Exit Way key.

6. Check Vsg. Adjust Vsg by turning VR104 on the main board [A] if Vsg is

not within the adjustment standard.

[A]


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10.6 ADS (Auto Image Density Sensor) ADJUSTMENT

When: ADS voltage is not within the adjustment standard.

Purpose: To maintain correct ADS mode operation.

AdjustmentStandard:

ADS Reference Voltage = 3.0 ± 0.1 volts

Perform: SP #37

How:

Change the ADS reference voltage by VR103.

The voltage reading is displayed on the operationpanel.

1. Clean the white plate and auto image density sensor.



4. Turn on DPS101-8 on the main board to enter the SP mode.

5. Select SP#37 (See Service Program Mode Access Procedure) and pressthe Copy Exit Way key.

6. If the voltage is not within the adjustment standard, adjust it by turning

VR103 on the main board [A].

[A]


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10.7 REGISTRATION ADJUSTMENT

10.7.1 Registration Adjustment for Manual Feed and Sheet Feeder

When: Registration is not within the adjustment standard.

Purpose: To maintain proper registration.

Adjustment Stand-ard:

0 ± 2 mm (0 ± 0.08")

Perform:SP #26 (0.25 mm/step, 9 steps) orSP #27 (1 mm/step, 10 steps)

How:Change the registration roller start timing by SP #26 or SP#27.

1. Adjust the original registration sensor voltage as follows:

ADJUSTMENT STANDARD +2.6 ± 0.1 V

1) Remove the middle right cover.

2) Set the multimeter range to dc 20 V and connect the multimeter leadsas shown.

3) Turn on the main switch.

4) Adjust the voltage by turning VR101 on the main board [A] if the

voltage is not within the adjustment standard.

2. Make several copies by using the manual feed or sheet feeder and check

the registration.

3. Adjust the registration using SP #26 if the registration is not within theadjustment standard.

4. If the registration is not within adjustment standard using SP #26, adjust

the registration using SP #27.

[A]


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10.7.2 Registration Adjustment for Roll Feeder.

When: Registration is not within the adjustment standard.

Purpose: To maintain proper registration.

Adjustment

Standard:0 ± 3 mm (0 ± 0.12")

Perform:SP #78 (0.25 mm/step, 9 steps) orSP #79 (1 mm/step, 10 steps)

How:Change the registration roller start timing by SP

#78 or SP #79.

1. Adjust the original registration sensor voltage. (See Step 1 of Registration

Adjustment for Manual Feed and Sheet Feeder.)

2. Make several copies by using the roll feeder and check the registration.

3. Adjust the registration using SP #78 if the registration is out of adjustment

standard.

4. If the registration is not within the adjustment standard using SP #78,

adjust the registration using SP #79.


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10.8 ORIGINAL SKEW ADJUSTMENT

When: Original skew is not within the adjustment standard

Purpose: To correct skew

Adjustment

Standard:

0 ± 2 mm (0 ± 0.08")/400 mm (15.7")..... A1 Sideways

(10 multi copies)

0 ± 2.5 mm (0 ± 0.10")/400 mm (15.7")... A0 Lengthwise

(5 multi copies)

Perform: Turn the eccentric cam clockwise or counterclockwise.

How: Change the rear turn guide plate position.

1. Make several copies and check the copy image.If a skew image occurs, proceed with the following steps.

2. Open the original feed unit.3. Remove the top left and right covers.

4. Set the rear original table [A] to the down position.

5. Remove the original feed rear cover [B] (3 screws).

[A]

[B]


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6. Loosen the screw [A] securing the tension bracket [B] and move the

bracket upward.

7. Loosen the four screws [C] securing the rear turn guide bracket [D].

8. Turn the eccentric cam [E] clockwise or counterclockwise.

9. Confirm that the copy image is within the adjustment standard.

[A]

[B]

[C]

[D]

[C]

[C]

[E]

x

y

x

y

Copy paper

Copy image

x

If copy image x occurs, turn the eccentric cam counterclockwise.

If copy image y occurs, turn the eccentric cam clockwise.

y


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11. OTHERS

11.1 LOWER OZONE FILTER REPLACEMENT

NOTE: If the sheet feed is not installed, skip step 1.

1. Open the sheet feeder unit [A] and remove the safety switch cover [B]

(2 screws).


3. Remove the right inner cover [C] and support bracket [D] (5 screws).

4. Open the used toner tank cover [E] (1 screw).

5. Remove the lower right cover [F] (5 screws or 7 screws).

6. Replace the lower ozone filter [G].

[A]

[B]

[C]

[D]

[G][E]

[F]

31 December 1992 OTHERS

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11.2 ORIGINAL ENTRANCE SENSOR AND SWITCH BACKGATE SENSOR


2. Remove the top right cover.

3. Set the rear original table [A] to the down position.

4. Remove the original feed rear cover [B] (3 screws).

5. Remove the original entrance sensor bracket [C] (2 screws and 1connector).

6. Remove the original entrance sensor [D] from the bracket (1 screw).

7. Remove the switch back gate sensor bracket [E] (1 screw and 1

connector).

8. Remove the switch back gate sensor [F] from the bracket (1 screw).

[A]

[B]

[C]

[D] [E] [F]

OTHERS 31 December 1992

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SECTION 6

TROUBLESHOOTING

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1. TROUBLESHOOTING FOR COPY IMAGE

1.1 ABNORMAL COPY IMAGE

1.1.1 Low Image Density (Entire Copy Image)

Is toner supplied to the development unit?

Yes No

Toner the cartridge set properly?

Yes No

Set the toner cartridge properly or replace the cartridge if broken.

Toner density in the development tank may be too low.

⇒ Change ID sensor bias position from 0 to 2.

Is there sufficient toner in the cartridge?

Yes No

Toner supply amount may be low due to toner near end.

⇒ Replace the toner cartridge.

Toner supply system may not catch up with large black area on copy image.

⇒ Make white copies.

1.1.2 Low image density (partial copy image)

Partial void image?

Yes No

Transfer corona may leak or the development roller may not rotate.

⇒ Replace transfer corona end blocks or check the development drive section.

Charge corona may leak.

⇒ Replace charge corona end blocks.

31 December 1992 TROUBLESHOOTING FOR COPY IMAGE

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1.1.3 Uneven Copy Image

Developer level in the development unit?

Yes No

Developer may not be level in the development unit.

⇒ Check and correct the machine level.

Charge corona height may not be even.

⇒ Adjust the charge corona height and drum current if necessary.

1.1.4 Copy Image not Sharp

Is image density of solid areas too high?

Yes No

Is the light intensity setting proper?

Yes No

Adjust light intensity.

Jitter image?

Yes

Fix jitter problem.

Toner density may be high.

⇒ Change the ID sensor bias position from 0 to 1.

TROUBLESHOOTING FOR COPY IMAGE 31 December 1992

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1.2 DIRTY BACKGROUND

1.2.1 Dirty Background (entire Copy Image)

Is the original background pure white?

Yes No

Was ADS or Manual ID control selected?

ADS Manual

Is image density of solid areas high?

Yes No

Light intensity may be too low.

⇒ Clean the optics and adjust light intensity if necessary.

Toner density in the development unit may be too high.

⇒ Change the ID sensor bias position from 0 to 1.

ADS is not adjusted properly.

⇒ Adjust ADS.

Do dirty backgrounds still occur at lighter exposure setting?

Yes No


⇒ Clean the optics and adjust light intensity if necessary.

Is the image density of solid areas high?

Yes No


⇒ Clean optics and adjust light intensity if necessary.

Toner density in the development tank may be too high.



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1.2.2 Partial Dirty Background

Does the dirty background area change position at each copy cycle?

Yes No


Yes No

Dirty optics or foreign material may obstruct the light path.

⇒ Clean optics and check the light path.

Cleaning function may not work properly.

⇒ Check and fix the cleaning unit.


⇒ Change ID sensor bias position 0 to 1.

Does the dirty background area move if you reverse the ends of the drum?

Yes No

Drum sensitivity may not be even.

⇒ Replace the drum.

Light intensity may not be even.

⇒ Clean the optics and/or replace the fluorescent lamp.


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1.2.3 Dirty Background Band

Vertical band?

Yes No

Horizontal band?

Yes No

The fusing rollers may be dirty if background only appears at the copy leadingedge.

⇒ Clean or replace fusing rollers.

Lead from development unit if bands occur at 37 mm intervals.

⇒ Check and fix the development bias leakage.

Drum scratch if the bands are at 251 mm intervals.

⇒ Clean or replace the drum.

Is the edge of the dirty background band sharp?

Yes No

Charge corona grid may be dirty.

⇒ Clean charge corona unit.Exposure glass or fiber optics may be dirty.

⇒ Clean the exposure glass or fiber optics.


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1.2.4 Dirty Background Lines

Vertical lines?

Yes No

Horizontals?

Yes No

The fusing rollers may be dirty if lines appear only at the copy leading edge.

⇒ Clean and/or replace the fusing rollers.

Drum scratch if lines appear 251 mm interval.

⇒ Clean and replace the drum if necessary.

Do the lines appear when a plain white original is copied?

Yes No

Drum scratch.

⇒ Adjust light intensity. Replace the drum if lines are still visible.

Dirty exposure glass or cleaning blade damage.

⇒ Clean the exposure glass or replace the cleaning blade.

1.2.5 Random Dirty Background

Light dirty background?

Yes No

Toner may be falling from the cleaning unit or pick-off pawls.

⇒ Check and fix cleaning unit and pick-off pawls.


Yes No

Unknown.

⇒ Check around the drum.




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1.3.3 Partial Void Image

Paper wrinkling at void area?

Yes No

Does paper wrinkling still occur after replacing paper?

Yes No

Does paper wrinkling still occur when using manual feed?

Yes

Check and repair the paper feed and transfer section.

Paper has absorbed moisture.

⇒ Replace paper.

Paper wrinkling due to malfunction of the paper feed mechanism causes void area.

⇒ Check and repair the paper feed section.

1.3.4 Leading Edge Void Area

Do void areas appear only at the paper leading edge?

Yes

Transfer entrance mylar gap is too narrow.

⇒ Adjust transfer entrance mylar gap.

1.3.5 Trailing Edge Void Area

Do void arrears appear in line image areas as well as solid areas?

Yes No

PTL off timing is not set properly.

⇒ Change PTL off mode.

Transfer corona current is too high.

⇒ Clean the transfer corona unit and adjust the current if necessary.


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2. TROUBLESHOOTING SC CODES

2.1 SERVICE CALL (SC) CONDITION

2.1.1 SC Code E2 - Fusing Thermofuse Open

Definition:The temperature detected by the hot roller thermistor does not reach 100°C

within 4 minutes after the main switch is turned on.

<Points to check>• Fusing thermofuse

• Hot roller thermistor

• AC controller 1

2.1.2 SC Code E3 - Hot Roller Thermistor Open

Definition:The temperature detected by the hot roller thermistor does not reach 20°C

within 2 minutes after the main switch is turned on. (The resistance of the hot

roller thermistor is more than 126.5 KΩ.)

<Points to check>• Hot roller thermistor

• Main Board (CN110-11, CN110-12)

2.1.3 SC Code E4 - Hot Roller Thermistor Short

Definition:

The resistance of the hot roller thermistor is less than 0.1 KΩ within 2 minutesafter the main switch is turned on.


• Main Board (CN110-12)

31 December 1992 TROUBLESHOOTING SC CODES

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2.1.4 SC Code E5 - Pressure Roller Thermistor Open

Definition:

The resistance of the pressure roller thermistor is more than 1 mΩ within 2minutes after the main switch is turned on.

<Points to check>• Pressure roller thermistor

• Main Board (CN110-9, CN110-10)

2.1.5 SC Code E6 - Pressure Roller Thermistor Short

Definition:

The resistance of the pressure roller thermistor is less than 0.5 KΩ within 2minutes after the main switch is turned on.

<Points to check>• Pressure roller thermistor

• Main Board (CN110-10)

2.1.6 SC Code E8 - Exposure Lamp Thermistor Short

Definition:

The resistance of the exposure lamp thermistor is less than 2.4 KΩ for 20 sec-

onds.

<Points to check>• Exposure lamp thermistor

• Exposure lamp heater

• AC controller 2 (CN407-4, CN407-3)

• Main Board (CN107-B3)

2.1.7 SC Code E9 - Fusing Overheat

Definition:The temperature detected by the hot roller thermistor becomes higher than220°C.


• Fusing thermofuse

• AC controller 1 (T304/T306 for AC input voltage, T305/T307)

• Main Board (CN107-A25, CN107-A15)

TROUBLESHOOTING SC CODES 31 December 1992

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2.1.8 SC Code EA - Fusing Warm-up Error

Definition:The temperature detected by the hot roller thermistor does not reach the tar-get ready temperature within 12 minutes.


• Fusing thermofuse

• AC controller 1 (T304/T306 for AC input voltage, T305/T307)

• Main Board (CN107-A25, CN107-A15)

2.1.9 SC Code Eb -Pulse Generator Abnormal

Definition:The main board does not receive a pulse from the pulse generator for 1 sec-

ond while the main motor is on.

<Points to check>• Connection of the pulse generator connector terminal

• Pulse generator disc (turning or not)

• Main board (CN112-1, CN112-3)

2.1.10 SC Code EC - Total Counter Abnormal

Definition:Total counter does not operate.

<Points to check>• Total counter and its connection

• Main board (CN107-A14, CN107-B19, CN107-A20)

2.1.11 SC Code Ed - Toner Density Sensor Abnormal

Definition:The toner density sensor voltage is less than 1.6 volts or more than 4.7 volts

for 1 minute.

<Points to check>• Toner density sensor

• Flow of the developer at the toner density sensor area

• Main board (CN101-1, CN101-2, CN101-3)


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2.1.12 SC Code No Code (SP58) - *Exposure Lamp Abnormal

Definition:The light sensor voltage is less than 0.45 volts for 20 seconds.

<Points to check>• Exposure lamp

• Light sensor

• Lamp Regulator (CN1-1/CN1-2 for AC input voltage, CN3-1/CN3-

2/CN3-4/CN3-5)

• Main board (CN107-A5 for PWM, CN102-7 for Light Sensor out)

2.1.13 SC Code No Code (SP59) - *Exposure Lamp Thermistor Open

Definition:

The resistance of the exposure lamp thermistor is more than 248 Ω for 20

seconds.

<Points to check>• Exposure lamp thermistor

• Exposure lamp heater

• AC controller 2

• Main board (CN107-B4, CN107-B1)

TROUBLESHOOTING SC CODES 31 December 1992

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2.1.14 SC Code No Code (SP61) - *ID Sensor Abnormal

Definition:Vsg goes below 2.5 volts or Vsp goes above 2.5 volts.

<Points to check>• ID sensor

• ID sensor pattern

• Toner supply mechanism

• Drum

• Developer

• Development bias

• Charge corona

• Erase lamp

• Main Board (CN102-15, CN102-12)

NOTE: 1. For the above three service call conditions (*), the CallService indicator does not light and copying is possible.

These codes can be displayed using SP58, SP59 or SP61.

For all other codes, the Call Service indicator turns on and

the machine stops.

2. When the service call conditions (E2, E3, E4, E5, E6, E9 andEA) occur, for safety reason they cannot be cleared by

turning the main switch off and on. The following proceduremust be performed to clear these service call conditions:

(1) Turn off the main switch.

(2) Change the position of DPS102-8 on the main board from

OFF to ON or from ON to OFF.

(3) Turn on the main switch.


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74

72

73

7675

79

85

84

83

82

80

81

86

87

8877

78

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90

89

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63

61

62

646566

6768

6970

71

5859

60

49

47

48

50

51

5253 54 55 56

57

32333435363738

3940

4142

43

44

45

46

1

23

4

56

8 9 10 11 12 1314

1516

1718

19

20

21

22

23

24

25

26

2728

2930

31

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Name Index. No. P to PLocation

Motors

Main 5 A9

Development 1 A10

Exhaust Fan 25 B7

Cooling Fan 6 B7

Vacuum Fan 68 B8

Paper Feed 77 K13

Cutter 83 K13

Magnetic Clutches

OriginalForward Feed

52 F17

Registration 50 F17

Original Reverse

Feed

8 E17

Solenoids

Toner Supply 46 G17

Pattern Shutter 19 G17

Exit Gate 24 G17

Pick-off Pawl 34 F17

Paper Stopper 40 F17

Manual Feed 48 E17

Recycle Gate 26 E17

Switch Back

Gate

9 E17

Original Stopper 43 D17

Sheet Feeder 1 72 I12

Sheet Feeder 2 73 I12

Paper Pull Out 89 K12

Switches

Main 65 A4

Upper Safety 27 A3

Lower Safety 67 A2


Rear Safety 22 A3

Toner Cover 45 G16

Sheet Feeder

Set

64 B9

Rear Feeder 21 I4

Feed Pressure 76 I10

Unit Set 81 K14

Upper Door

Safety

86 K14

Middle DoorSafety

84 K14

Lower Door

Safety

85 K14

Sensors

Image Density 33 G2

Toner Density 36 H2

Toner Overflow 28 H2

Pulse Generator 23 I5

Original Set 41 I5

1st Original

Transport

11 I5

2nd OriginalTransport 14 I6

Original Registra-

tion

12 I6

Light 4 C7

Original Entrance 13 I7

Switch Back

Gate

10 I8

Original Exit 39 I7

Recycle Gate 30 I7

1st Feed 38 I8

2nd Feed 37 I8

Registration 35 I9

Transport 71 I9

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Fusing Exit 17 I9

Upper Exit 16 I10

Lower Exit 18 I10

Paper Entrance 74 I11

Paper End 75 I11

Paper End 82 K14

Left Cutter 87 K16

Right Cutter 80 K15


Transfer/

Separation

54 F2

Thermistors

Hot Roller 56 B6

Pressure Roller 58 B5

Exposure Lamp 44 B9

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