Okidata OKIPAGE 8w Service Manual

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Service Guide OKIPAGE8w

Chapter 0 Introduction

OKIPAGE 8w

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05/17/99

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Table of Contents Page

Service Guide OKIPAGE8w

0 Introduction

Preface 1

1 Configuration

Configuration 2

....1.1 System Configuration 3

....1.2 Printer Configuration 4

....1.3 Specification 5

....1.4 Safety Standards 6

........1.4.1 Certification Label 7

........1.4.2 Warning Label 8

2 Operation Description

2.0 Operation Description 9

2.1 Main Control Board 10

2.2 Power Supply Unit 11

2.3 High-Voltage Power Supply Board 12

2.4 Electro-Photographic Processor 13

2.5 Electro-Photographic Process 14

....2.5.1 Explanation of Each Process Operation 15

2.6 Paper Jam Detection 16

2.7 Toner Low Detection 17

2.8 Cover Open 18

2.9 Detecting ID existence 19

3 Parts Replacement

Parts Replacements 20

....3.1 Precautions for Parts Replacement 21

....3.2 Parts Layout 22

........Upper Cover Assy 23

........Base Frame Unit 24

........Base Plate Unit 25

....3.3 Replacing Parts 26

........3.3.1 Hopper Plate 27

........3.3.2 LED Head and Head Spring 28

........3.3.3 Transfer Roller 29

........3.3.4 Upper Cover Assy 30

........3.3.5 High-Voltage Power Supply Board (P2H/P6L) 31

........3.3.6 Top Cover Assy and Flat Cable Assy 32

........3.3.7 Paper Holder 33

........3.3.8 Side Plate M and Idle Gear 34

........3.3.9 Heat Assy 35

........3.3.10 Drive Shaft E (Eject) and Eject Roller 36

........3.3.11 Pressure Roller B (Back Up Roller) 37

........3.3.12 Separator Guide 38

........3.3.13 Pulse Motor (Main) 39

........3.3.14 Hopping Shaft Assy 40

........3.3.15 Resist Roller 41

........3.3.16 Paper Sensor E, Paper Sensor Exit and Toner

Sensor Assy

........3.3.17 Base Plate 43

4 Adjustment

Table of Contents Page

4.0 Adjustment 44

....4.1 Adjustment Types and Functions 45

........4.1.1 Printer Driver 46

........4.1.2 Engine Maintenance Utility 47

....4.2 Adjustment When Replacing a Part 48

........4.2.1 Setting LED Head Drive Time 49

........4.2.2 Uploading and Downloading EEPROM Data 50

5 Periodical Maintenance

5.1 Periodical Replacement Parts 51

5.2 Cleaning 52

....5.2.1 Cleaning the LED Lens Array 53

6 Troubleshooting Procedures

6.1 Troubleshooting Tips 54

6.2 Check Points Before Correcting Image Problems 55

6.3 Notes When Correcting Image Problems 56

6.4 Preparation Before Troubleshooting 57

6.5 Troubleshooting 58

....6.5.1 Status Monitor Message List 59

....6.5.2 Status Message Troubleshooting 60

....6.5.3 Image Troubleshooting 61

........(1) An image is light or blurred entirely 62

........(2) Dark background density 63

........(3) A blank paper is output 64

........(4) Vertical black belt/stripe 65

........(5) Cyclic defect 66

........(6) A blank paper is output 67

........(7) Poor fusing 68

........(8) Vertical white belt/stripe 69

........Contents - Figure 6-4 70

........Contents - Figure 6-5 71

7 Wiring Diagram

7.1 Interconnect Signal Diagram 72

7.2 PCB Layout 73

....7.2.1 Main Control Board (HBY PCB) 74

....7.2.2 High-Voltage Power Supply Board 75

8 Parts List

Cover Assy Upper 76 Base Frame Unit 77 Heat Assy 78 Base Plate Unit 79

A Local Printing

Local Printing 80

B Parallel Interface

Parallel Interface 81

C Maintenance Utility

Outline of Maintenance Utility 82 Detail of Each Function 83

....4.1 Engine Menu Setting 84

....4.2 Engine Counter 85

....4.3 Printer Status 86

Table of Contents Page

....4.4 Test Print 87

....4.5 Option 88

....4.6 About 89

....4.7 Reload 90

.... 4.8 Exit 91

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Service Guide OKIPAGE8w

Chapter 0 Introduction

Preface

This Service Handbook describes the field maintenance procedures for the OKIPAGE 8w.

This manual is written for use by service persons. Please note that you should refer to the Printer User's Manual for operating procedures.

Service Guide OKIPAGE8w

Chapter 1 Configuration

Configuration

System Configuration

Printer Configuration

Specification

Safety Standards

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Service Guide OKIPAGE8w

Chapter 1 Configuration

1.1 System Configuration

The OKIPAGE 8w consists of a control block, a power supply unit, and an engine block. (See Figure 1-1 below.)

Figure 1-1

Service Guide OKIPAGE8w

Chapter 1 Configuration

1.2 Printer Configuration

The printer unit consists of the following five hardware components:

Electro-Photographic Processor l Paper Feeder l Main Control Board l High-Voltage Power Supply Board l Power Supply Unitl

Figure 1-2 is the configuration of the printer unit.

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Figure 1-2

1.3 Specification

(1) Type: Desktop

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Service Guide OKIPAGE8w

Chapter 1 Configuration

(2) Outside dimensions

(excludes protruding

portion) (3) Weight 9.3 lbs. (4.2 kg) (4) Development method

Exposure method (5) Paper used <Type>

(6) Printing speed: First print: 23 seconds (A4) (after warm-up)

Height: 5.9" (150 mm) Width 12.2" (310 mm) Depth 7.5" (191mm)

Dry non-magnetic development system LED stationary head

Standard paperl

- Xerox 4200 (20 lbs) Application paper (manual face-up feed)l

- Label

- Envelope

- OHP paper (Transparency)

<Size> 14" (355.6 mm) (Max.) x 8.5" (215.9 mm)

<Thickness> Automatic feed: 16 to 28 lbs (60 to 105 g/m2)

- Manual feed: Label, Envelope, OHP paper (transparency)

Continuous print: 8 sheets/minute (A4) Warm-up time: 40 seconds (120 VAC for ODA, 230 VAC for

OEL/INT) (at room temperature 77o F (25o C) (7) Paper feeding method Automatic paper feed or manual paper feed (8) Paper delivery

method

(9) Resolution 600 dpi x 600 dpi (true) (10) Power input 230 VAC +/-10% (for OEL/INT)

(11) Power consumption Peak: Approx. 450W

(12) Temperature and

humidity

Face down

120 VAC +/-15% for (ODA)

Typical operation: Approx. 100W

Idle: Approx. 30W

Power save mode: Approx. 5W

Temperature Humidity

During operation In storage

10 to 32o C

-10 to +43o C

20 to 80% RH (relative humidity) 10 to 90% RH (relative humidity)

No condensation is permissible.

Caution: Temperature and humidity in storage are measured with the OKIPAGE 8w being packed; they are valid for one year.

(13) Noise During operation: 48 dB (A) or less

Standby: 38 dB (A) or less (14) Consumables Toner cartridge kit - 1,500 (5% duty) ---- 45g cartridge kit

Image drum cartridge - 10,000 (at continuous printing)

Service Guide OKIPAGE8w

Chapter 1 Configuration

1.4 Safety Standards

1.4.1 Certification Label

1.4.2 Warning Label

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Service Guide OKIPAGE8w

Chapter 1 Configuration

1.4.1 Certification Label

The safety certification label is affixed to the following location of the OKIPAGE 8w:

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Service Guide OKIPAGE8w

Chapter 1 Configuration

1.4.2 Warning Label

Warning labels are affixed to the locations that may cause bodily injury. During maintenance, do work with enough care while following instructions on these warning labels.

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Service Guide OKIPAGE8w

Chapter 2 Operation Description

2.0 Operation Description

The OKIPAGE 8w consists of a main control board, a high-voltage power supply board, a power supply unit, and an electro-photographic processor. The OKIPAGE 8w receives print data from a higher-level interface and sequentially stores it in memory. The OKIPAGE 8w decodes and edits the received data while storing print data from the interface in memory. It sequentially transfers the edited data to the LED head for each dot line. The electro-photographic processor then prints the data on sheets of paper.

The display of the higher-level host is used for device operation and status display. Figure 2-1 is the block diagram of the OKIPAGE 8w.

Figure 2-1 Block Diagram

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Service Guide OKIPAGE8w

Chapter 2 Operation Description

2.1 Main Control Board

The main control board consists of a one-chip CPU, a program ROM, a DRAM, an EEPROM, a host interface circuit, and a mechanism driving circuit. The mechanism driving circuit consists of an LED head, a main motor, and an electromagnetic clutch.

(1) One-chip CPU The one-chip CPU is a custom CPU (8-bit internal bus, 8-bit external bus, 10-MHz clock) incorporating

mask ROM and CPU peripheral devices. This CPU has the functions listed in the table below.

Built-in Device Function

DRAM controller Controls DRAM. DMA controller Transfers image data from Parallel I/F to DRAM, from

DRAM to a video output port and between CPU and DRAM. Parallel interface controller Controls the parallel interface. Video output port

LED STB output port Timer Generates various control timings for monitoring paper

I/O Port Inputs and outputs the sensor signals and motor signals,

A/D converter Inputs the feedback signals from a high-voltage generation

(2) Program ROM Program ROM contains a program for the equipment. EPROM is used as program ROM. When mask

ROM in the one-chip CPU explained in (1) above is valid, the EPROM is not mounted. (For details on short wiring setting, see Section 7.2.)

(3) DRAM DRAM is used as resident memory. (4) EEPROM

Controls LED head.

feeding and a paper size.

etc. Also performs I/O for EEPROM.

circuit and thermistor signal.

EEPROM holds the following data:

Menu data l Counter value l

Adjustment valuel (5) Parallel interface The parallel interface receives parallel data from the host; it conforms to the IEEE1284 specification.

Service Guide OKIPAGE8w

Chapter 2 Operation Description

2.2 Power Supply Unit

The power supply unit supplies +5 V and +26 V to the main control board according to 230 VAC / 120 VAC.

Output voltage Application

+5 V Used to generate a logic circuit and a high voltage.

+26 V used to drive the motor and electromagnetic clutch.

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Service Guide OKIPAGE8w

Chapter 2 Operation Description

2.3 High-Voltage Power Supply Board

(1) High-Voltage power supply circuit The high-voltage power supply circuit generates the following voltages required for the electro-photographic processor

from +5 V according to the control sequence from the main control board. When the cover is open, +5 V supply is automatically interrupted to stop high-voltage output.

Output Voltage Application

CH -1.3 KV Voltage to be applied to charge roller. DB -265 V/+265 V Voltage to be applied to a developing roller. SB -520 V/ 0 V Voltage to be applied to a sponge roller. CB +400 V/-1.3 KV Voltage to be applied to a cleaning roller. TR +500 V ~ +3.5 KV/-750 V Voltage to be applied to a transfer roller.

Caution: The TR voltage varies with medium and transfer roller impedance.

(2) Sensors The high-voltage power supply board consists of the high-voltage power supply circuit that supplies power to the

electro-photographic processor system and the photosensor that detects a paper feeding system and toners. Figure 2-2 shows the sensor layout drawing.

Sensor Function Sensing State

Manual feed sensor Monitors whether paper was inserted into the

manual feed sensor section.

Paper sensor Detects the leading part of the paper. Monitors

paper feeding.

Output sensor Monitors paper feeding and the paper size

according to the paper sensor arrival and passing

ON: Paper exists. OFF: No paper exists.

time.

Toner sensor Detects the low toner status. ON (long): Toner low.

OFF (short): Toner high.

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Service Guide OKIPAGE8w

Chapter 2 Operation Description

2.4 Electro-Photographic Processor

The electro-photographic processor prints out the image data to be sent from the main control board on sheets of paper. Figure 2-3 shows the layout drawing of the electro-photographic processor.

(1) Image drum unit The image drum unit makes a toner adhere to the formed electrostatic latent image with static electricity. This

electrostatic latent image is formed by the lights irradiated from LED heads. (2) Electromagnetic clutch The electromagnetic clutch controls the rotation of the hopping roller according to signals from the control block.

(3) Pulse motor (Main) This pulse motor of 48 steps/rotation is two-phase excited by the signal from the main control board; it performs feeding

control by switching normal rotation to reverse rotation or vice versa and turning on/off the electromagnetic clutch. The relationship between the main motor, electromagnetic clutch, resist gear, drum gear, hopping roller is shown in the table below and on the subsequent pages.

Main Motor Electromagnetic

Clutch

Hopping Roller Regist Gear Drum Gear Operation

Normal rotation OFF Non-rotation Non-rotation Rotation Warm-up Reverse rotation ON Rotation Rotation Rotation Hopping Reverse rotation OFF Non-rotation Rotation Rotation Printing

(4) LED head The shift and latch registers receive image data from the main control board for each dot line. 4,992 LEDs are driven to

radiate the image drum. (5) Heat Assy The heat Assy consists of a heater, a heat roller, a thermistor, and a thermostat. The power supply unit supplies AC voltage to the heater according to the HEATON signal from the main control board to

heat the heat roller. The main control board monitors the heat roller temperature via the thermistor and keeps the temperature constant by turning on/off the heater AC voltage supply.

If the heat roller temperature rises abnormally, the thermostat of the heater voltage supply circuit functions to forcibly suspend the AC voltage supply.

Roller control by pulse motor (main)

(1) Normal rotation of pulse motor (main): Drum roller, transfer roller, cleaning roller, CH roller,

developing roller, heat roller, exit roller rotation.

(2) Reverse rotation of pulse motor (main): Drum roller, transfer roller, cleaning roller, CH roller,

developing roller, heat roller, exit roller, feed roller, hopping roller rotation. Hopping operation from the tray, however, is performed when the electromagnetic clutch is turned on.

Service Guide OKIPAGE8w

Chapter 2 Operation Description

2.5 Electro-Photographic Process

(1) Charging - The surface of the OPC drum is charged negatively and uniformly by applying the DC

voltage to the CH roller.

(2) Exposure - Light emitted from the LED head irradiates the negatively charged surface of the OPC

drum. The surface potential of the irradiated surface attenuates to form the electrostatic latent image corresponding to the image signal.

(3) Development and residual toner recovery - The negatively charged toner is brought into contact with

the OPC drum, adhering to the electrostatic latent image on the OPC drum by static electricity. This adhesion causes the electrostatic latent image to change to a visible image. At the same time, the residual toner on the OPC drum is attracted to the developing rollerby static electricity.

(4) Transfer - When paper is placed over the image drum surface, the positive charge which is opposite

in polarity to that of the toner, is applied to the reverse side by the transfer roller. The toner is attracted by the positive charge and is transferred onto the paper. This results in the transfer of the toner image formed on the image drum onto the paper.

(5) Cleaning - The cleaning roller temporarily attracts the residual toner on the transferred OPC drum

with static electricity, then returns the toner to the OPC drum.

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(6) Fusing - The transferred unfused toner image is fused to a sheet of paper by applying heat and

pressure to the image.

Figure 2-5 shown below is a flow for the electro-photographic process.

Service Guide OKIPAGE8w

Chapter 2 Operation Description

2.5.1 Explanation of Each Process Operation

(1) Hopping As shown in the figure below, the clutch for hopping is turned on/off according to current ON/OFF to a coil. When the clutch is OFF

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When the clutch is ON

When the clutch is on, the hopping gear engages with the clutch plate to rotate the hopping roller. When the clutch is off, the hopping gear is separated from the clutch plate by the spring for resetting, disabling the

rotation of the hopping roller. (2) Printing and warm-up At warm-up

Rotate the pulse motor (main) in the a direction. The planetary gear rotates in the a' direction, dislocating its position in the a" direction. This causes the planetary gear to be separated from gear A. The hopping gear will not rotate. The triple gear and transfer gear rotate via the idle gear to drive the EP unit.

At printing

The paper is further advanced in synchronization to the print data. (3) Charging Charging is performed by applying DC voltage to the charge roller that is in contact with the surface of the OPC drum.

(4) Exposure

Light emitted from the LED head irradiates the negatively charged surface of the OPC drum. The surface potential of the irradiated surface attenuates to form the electrostatic latent image corresponding to the image signal.

(5) Development The electrostatic latent image on the surface of the OPC drum is changed to a visible toner image by applying a toner to

it. Development is performed in the contact part between the OPC drum and developing roller.

1 The sponge roller negatively charges a toner and applies it to the developing roller.

2 The toner applied to the developing roller is thin-coated by the developing blade. 3 A toner adheres to the exposure part of the OPC drum in the contact part between the OPC drum and

developing roller. This causes the electrostatic latent image to be changed to a visible image.

(6) Transfer The transfer roller is composed of conductive sponge material. This roller is set so that the surface of the OPC drum and

sheets of paper will adhere closely. A sheet of paper is placed on the surface of the OPC drum and the positive charge opposite to the negative charge of a

toner is applied from the reverse side by the transfer roller. When a high negative voltage is applied from the power supply to the transfer roller, the positive charge induced on the

surface of the transfer roller moves to the paper side at the contact part between the transfer roller and the sheet of paper. The positive charge on the lower side of the sheet of paper then causes the negatively charged toner adhering to the surface of the OPC drum to move to the upper side of the sheet. This enables transfer to the sheet of paper.

(7) Fusing The transferred unfused toner image is fused to a sheet of paper because heat and pressure are applied when it passes

between the heat roller and back-up roller. The Teflon-coated heat roller contains a 400 W heater (Halogen lamp) that heats the heat roller. The thermistor on the

surface of the heat roller keeps the temperature of the heat roller constant. A thermostat is also installed for safety. If temperature rises abnormally, this thermostat opens to suspend voltage supply to the heater.

The back-up roller is pressurized to the heat roller by the pressure spring on each side.

(8) Cleaning After transfer has terminated, the cleaning roller temporarily draws in the untransferred residual toner adhering to the

OPC drum with static electricity and then returns it to the OPC drum.

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Service Guide OKIPAGE8w

Chapter 2 Operation Description

2.6 Paper Jam Detection

The OKIPAGE 8w monitors the paper status when the power supply is on and during printing. In the following cases, the OKIPAGE 8w interrupts the printing process as a paper jam. Printing can be recovered by opening the cover, removing the jammed paper, and closing the cover.

Error Cause of Error

Paper inlet jam - Only the manual feed sensor detects "Paper exists" when the power

supply is on.

- The leading part of the paper does not reach the paper sensor although hopping operation was performed three time.

Paper feed jam - The leading part of the paper does not reach the outlet sensor within a

fixed time after it has passed the paper sensor.

Paper outlet jam - The trailing part of the paper does not pass the outlet sensor within L

mm after the leading part of the paper has passed the outlet sensor.

2.52" (64 mm) <= L <= 15.77" (400.6 mm)

Paper size error - The trailing part of the paper does not pass the paper sensor within L

mm after the leading part of the paper has passed the paper sensor.

2.52" (64 mm) <= L <= 15.77" (400.6 mm)

Paper Feed Check List

Type of Error Supervisory

Sensor

Paper feed error Electromagnetic

Reference Value Error

Plus Minus

69.8 35 _ clutch ON/Paper sensor ON

Paper feed jam 1 Paper sensor ON/

122.9 20.0 _ Outlet sensor ON

Paper size error Paper sensor ON/

Paper sensor OFF

2.52" (64 mm) <= L

_ _

15.77" (400.56 mm)

Paper outlet jam Outlet sensor ON/

Outlet sensor OFF

2.52" (64 mm) <= L

45.0 45.0

15.77" (400.56 mm)

Paper feed jam 2 Outlet sensor OFF/

Outlet sensor OFF

121.9 20.0 20.0

Unit: mm

Timing Chart for Paper Feed (Tray Feed)

Service Guide OKIPAGE8w

Chapter 2 Operation Description

2.7 Toner Low Detection

Hardware configuration of toner sensorl

The figure below shows the hardware configuration of the toner sensor.

Page: 17

Hardware Configuration of Toner Sensor

Toner detection methodl

(1) Toner sensor monitoring conditions are shown in the figure below.

Caution: The toner sensor is not monitored when the drum is inactive.

(a) When the toner-low state continues twice, Toner Low occurs. (This state is monitored at a cycle of 40 milliseconds.) (b) When the toner-full state continues twice, Toner Low is released. (This state is monitored at a cycle of 40

milliseconds.) (c) When the toner sensor does not change over two cycles (T x 2), the toner sensor alarm state occurs.

(d) After the EP unit has been replaced (after the drum counter has been reset), Toner Low is not detected when the drum counter indicates 1 to 100 counts.

(2) The basic rotation cycle of the toner sensor is as follows:

T time

Basic rotation cycle of toner sensor 2.5 sec. Toner low time t1 > 0.6 sec. Toner full time 0.6 > t1 > 0.14 sec.

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Service Guide OKIPAGE8w

Chapter 2 Operation Description

2.8 Cover Open

Opening the stacker cover turns off the microswitch on the high-voltage power supply board to suspend +5 V supply to the high voltage power supply. This results in the stop of all high-voltage outputs. At the same time, the CVOPN signal is issued to notify the main control board of the switch status and cover open processing is executed.

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Service Guide OKIPAGE8w

Chapter 2 Operation Description

2.9 Detecting ID existence

In this model, a micro switch may be activated, applying a high voltage to the machine under a state where the cover is slightly opened. In this case, there is a fear that, when a user insert his hand through the opening, he may be shocked unless an ID has been installed. (Safety standard measures EN60950: 1992)

Therefore, with mechanism, an interlock system for micro switch shall be added if a machine has no mechanism with ID inside. Also, for control, ID existence detection shall be implemented according to the following method.

<Conditions for judging ID existence> If a toner sensor does not change for 1.2 cycle of toner sensor basic rotation cycle soon after powering on or closing

cover, no installed ID shall be judged, stopping Warming Up motion to shift the machine mode to light malfunction. But this error can be recovered by cover open and close operation after installing ID.

T time Remarks

ID existence detection time 3.04 sec. As the toner sensor monitors at intervals of 40 msec. the

fractional part should be rounded down.

The conditions for enabling this error should be as follows.

Valid condition In the case of 31 pages or more in total drum counter Invalid condition In the case of 30 pages or less in total drum counter, a significant malfunction

toner sensor error shall occur.

But when the toner sensor breaks down with 31 or more counted in total at the drum, ID not Install will be displayed without fail at power on. Even in this case, the machine should be in printable state so that printing can be guaranteed until the completion of toner repair. (See the drawing below).

Image Drum (ID) not Installed / Toner Sensor Error

Specification

1. Toner sensor error/ID not Installed state should not be stored in the EEPROM.

2. A shift to ID not Installed and Toner Sensor Error shall be made at cover open or close.

Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

Parts Replacements

This chapter explains how to replace parts, assemblies, and units in the field. The replacement procedures to be explained here include dismounting, not mounting. When mounting parts,

assemblies, and units, reverse the dismounting steps.

3.1 Precautions for Parts Replacement

3.2 Parts Layout

3.3 Replacing Parts

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

3.1 Precautions for Parts Replacement

(1) Be sure to disconnect the AC cord and interface cable before replacing parts.

(a) Be sure to disconnect the AC cord in the following procedures:

i) Turn off the POWER switch ("0"). ii) Disconnect the AC plug from the power outlet. iii) Disconnect the AC cord and interface cable from the printer.

(b) Be sure to reconnect the printer using the following procedures:

i) Connect the AC cord and interface cable to the printer. ii) Connect the AC cord to the power outlet. iii) Turn on the printer's POWER switch (|).

Page: 21

(2) Do not disassemble parts as long as the printer is operating normally. (3) Minimize disassembling. (Only the parts indicated in the parts replacement procedures can be

disassembled.) (4) Use only the specified maintenance tools. (5) Disassemble parts in the specified sequence; otherwise, parts may be damaged. (6) Temporarily tighten small parts such as screws and collars to the original locations because they tend

to be lost easily. (7) When handling ICs such as CPUs, ROM, and RAM and PC boards, do not wear gloves that can

generate static electricity. (8) Do not place PC boards directly on devices or floors.

[Maintenance Tools]

Table 3-1 lists the maintenance tools necessary for parts replacement.

[Maintenance Utility]

Table 3-2 Maintenance Utility

Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

3.2 Parts Layout

This section explains the layout of main parts.

Upper Cover Assy

Base Frame Unit

Base Plate Unit

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Upper Cover Assy

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

Base Frame Unit

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

Base Plate Unit

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

3.3 Replacing Parts

This section explains how to replace parts and assemblies.

3.3.1 Hopper Plate

3.3.2 LED Head and Head Spring

3.3.3 Transfer Roller

3.3.4 Upper Cover Assy

3.3.5 High-Voltage Power Supply Board (P2H/P6L)

3.3.6 Top Cover Assy and Flat Cable Assy

3.3.7 Paper Holder

3.3.8 Side Plate M and Idle Gear

3.3.9 Heat Assy

3.3.10 Drive Shaft E (Eject) and Eject Roller

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3.3.11 Pressure Roller B (Back Up Roller)

3.3.12 Separator Guide

3.3.13 Pulse Motor (Main)

3.3.14 Hopping Shaft Assy

3.3.15 Resist Roller

3.3.16 Paper Sensor E, Paper Sensor Exit, and toner Sensor Assy

3.3.17 Base Plate

3.3.1 Hopper Plate

Remove two claws and dismount hopper plate (1).1.

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

3.3.2 LED Head and Head Spring

Open top cover assy (1).1. Dismount the left clamp and LED head (2). Then, dismount flat cable assy (3).2. Dismount two head springs (4).3.

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

3.3.3 Transfer Roller

Open top cover assy (1) and dismount the image drum unit (Type 6) (2).1. Remove the right claw. Then, dismount transfer roller (3), two regist bearings (4), and gear T (5).2.

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

3.3.4 Upper Cover Assy

Turn off the power switch and unplug the AC cord from the AC socket.1. Disconnect interface cable (1).2. Open top cover assy (2) and dismount the image drum unit (Type 6) (3).3. Move paper guide (L) (4) and paper guide (R) (5) on the rear of the printer to the center.4. Remove two front claws of upper cover assy (6) and lift upper cover assy (6).5. Dismount spur gear (A) (7), guide slide (L) (8), and guide slide (R) (9).6. Dismount lamp (10).7.

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

3.3.5 High-Voltage Power Supply Board (P2H/P6L)

Dismount upper cover assy. (See Section 3.3.4.)1. Remove three screws (1) and remove the cover (2) and draw out high-voltage power supply board (3).2. Disconnect all the cables (4) from high-voltage power supply board (3) and dismount high-voltage power supply 3.

board (3).

Caution: Note the following when assembling the high-voltage power supply board:

Mount the high-voltage power supply board with top cover assy removed or open.l Take care that cable 4 will not interfere with the paper sensor exit when it is connected.l

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3.3.6 Top Cover Assy and Flat Cable Assy

Dismount the upper cover assy. (See Section 3.3.4.)1. Dismount the LED head. (See Section 3.3.2.)2. Press the left clamp outward and dismount the engagement and top cover assy (1). (Tension spring (2) also comes 3.

off at the same time.) Disconnect connector CN6 and dismount flat cable assy (3).4.

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

3.3.7 Paper Holder

Dismount the upper cover assy.(See Section 3.3.4.)1. Dismount paper holder (1).2. Unlock and dismount paper guide (L) (2) and paper guide (R) (3).3. Remove the claw and dismount hopper spring (4).4. Remove the claw and dismount stopper spring (5).5.

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

3.3.8 Side Plate M and Idle Gear

Perform parts replacement while making the base frame assy stand so that side plate M will face upward.

Dismount the upper cover assy. (See Section 3.3.4.)1. Remove two screws (1) and two claws, then dismount plate side M(2).2. Dismount earth plate (3), two idle gears P (4), idle gear M (5), idle gear 3R (6), idle gear 2R (7), idle gear heat (8), 3.

idle gear R (9) and Gear R (10).

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Chapter 3 Parts Replacement

3.3.9 Heat Assy

This section explains how to dismount the heat assy and parts in the assy.

1. Dismount the upper cover assy. (See Section 3.3.4.)

2. Dismount the high-voltage power supply board. (See Section 3.3.5.)

3. Remove two screws (1), disconnect connector (2), and dismount heat assy (3).

4. Dismount heat separator (14).

5. Remove screw (4) and dismount terminal plate (6). (Handle heat assy (3) carefully because Halogen lamp (7) comes off.)

6. Turn left and right heat bearings (8) in the arrow direction to unlock. Then, dismount Halogen lamp (7), heat bearing (8), heat roller (9), and heat gear (13) together. (Take care not to drop Halogen lamp (7).)

7. Dismount thermistor (10).

8. Dismount the clamp, then thermostat (11), heat contact (12), and heat cord (5) together.

9. Dismount heat contact (12) and heat cord (5) from thermostat (11).

Caution: Take care not to bend the claw when dismounting heat bearing (8).

3.3.10 Drive Shaft E (Eject) and Eject Roller

Dismount the upper cover assy. (See Section 3.3.4.)1. Dismount top cover assy. (See Section 3.3.6.)2. Remove two screws (1) from heat assy (Section 3.3.9), life the heat assy, and dismount idle gear E (A) (2) and idle 3.

gear E (B) (3). Unlock and dismount drive shaft E (Eject) (4).4. Dismount two eject rollers (5).5.

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

3.3.11 Pressure Roller B (Back Up Roller)

Dismount the upper cover assy. (See Section 3.3.4.)1. Dismount the high-voltage power supply board. (See Section 3.3.5.)2. Dismount the heat assy. (Section 3.3.9)3. Dismount the engagement with the left ground, then pressure roller B (1). (Two bearing BUs (2) and two bias 4.

springs (3) also come off at the same time.)

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

3.3.12 Separator Guide

1. Dismount the upper cover assy. (See Section 3.3.4.)

2. Dismount the high-voltage power supply board. (See Section 3.3.5.)

3. Remove four screws (1).

4. Dismount inlet (2) from base frame (3). <Dismounting inlet (2)> Insert a screwdriver into the hole on the side of base frame (3), remove the inlet claw from base frame (8), and dismount

inlet (2).

5. Disconnect three cables (4) and connector (11) and dismount base frame (3). Then, remove screw (10). <Disconnecting connector (11), (12)> Dismount connector (11) by drawing it upward while pushing the clamp lever with a standard screwdriver.

6. Dismount the paper holder assy. (See Section 3.3.7.)

7. Dismount two engagements and sheet guide (5).

8. Dismount friction pad (6), compression spring S(7), and separator guide (8).

9. Dismount paper sensor E(9).

Dismount Inlet Disconnecting Connector Disconnecting Connector

3.3.13 Pulse Motor (Main)

Dismount the upper cover assy. (See Section 3.3.4.)1. Dismount the high-voltage power supply board. (See Section 3.3.5.)2. Dismount side plate M. (See Section 3.3.8.)3. Dismount the base frame. (See Section 3.3.12.)4. Remove two screws (1) and dismount pulse motor (main) (2).5.

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

3.3.14 Hopping Shaft Assy

Dismount the upper cover assy. (See Section 3.3.4.)1. Dismount the high-voltage power supply board. (See Section 3.3.5.)2. Dismount the base frame. (See Section 3.3.12.)3. Dismount the paper holder assy. (See Section 3.3.7.)4. Dismount the sheet guide. (See Section 3.3.12.)5. Dismount side plate M. (See Section 3.3.8.)6. Raise up roller holder (3), slide hopping shaft assy (1), and dismount roller holder (3) and hopping roller (4). (Knock 7.

pin (5) also comes off at the same time. Take care not to lose it.) Draw out hopping shaft assy (1) to the right and dismount magnet H (6).8.

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3.3.15 Resist Roller

Dismount the upper cover assy. (See Section 3.3.4.)1. Dismount Idle gear R (3) and Gear R (4).2. Move resist roller (1) to the right and dismount it by lifting. (Two resist bearings (2) also come off at the same time. 3.

Take care not to lose them.)

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

3.3.16 Paper Sensor E, Paper Sensor Exit and Toner Sensor Assy

Dismount the upper cover assy. (See Section 3.3.4.)1. Dismount the high-voltage power supply board. (See Section 3.3.5.)2. Dismount the base frame. (See Section 3.3.12.)3. Dismount the paper holder assy. (See Section 3.3.7.)4. Dismount the sheet guide. (See Section 3.3.12.)5. Dismount the heat assy. (Section 3.3.9)6. Dismount drive shaft E. (See Section 3.3.10.)7. Dismount paper sensor E (1).8. Dismount paper sensor exit (2).9. Dismount toner sensor assy (3).10.

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3.3.17 Base Plate

Dismount the upper cover assy. (See Section 3.3.4.)1. Dismount the base frame. (See Section 3.3.12.)2. Remove two screws (1), disconnect connector (2), and dismount power supply unit (3).3. Dismount insulation sheet (4).4. Remove five screws (5) and dismount main control board (6).5. Remove screw (7) , disconnect connector (8) and dismount P6L board (9) from base plate (10).6. Dismount insulation sheet (11).7.

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Service Guide OKIPAGE8w

Chapter 3 Parts Replacement

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Service Guide OKIPAGE8w

Chapter 4 Adjustment

4.0 Adjustment

This chapter explains adjustment necessary when a part is replaced. This adjustment is made by changing the parameters values set in EEPROM on the main control board. The printer

driver or maintenance utility can be used to change these values. Only servicemen and maintenance personnel can use the maintenance utility. This utility cannot be made public for

printer end users.

4.1 Adjustment Types and Functions

4.2 Adjustment When Replacing a Part

Service Guide OKIPAGE8w

Chapter 4 Adjustment

4.1 Adjustment Types and Functions

4.1.1 Printer Driver

4.1.2 Engine Maintenance Utility

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4.1.1 Printer Driver

(For Microsoft Windows) This printer driver has the following functions:

Drum counter resetl Charge roller cleaningl

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Service Guide OKIPAGE8w

Chapter 4 Adjustment

Figure 4-1

(1) Drum counter reset This function resets the life of the drum counter when the image drum unit is replaced. Clicking the "clear" button resets

the life. (2) Charge roller cleaning This function cleans the charge roller of the image drum unit; it is used when printing is unclear. For details on how to

operate this function, refer to "User's Manual."

Service Guide OKIPAGE8w

Chapter 4 Adjustment

4.1.2 Engine Maintenance Utility

See Appendix C.

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Service Guide OKIPAGE8w

Chapter 4 Adjustment

4.2 Adjustment When Replacing a Part

The table below lists the parts that requires adjustment when they are replaced:

Parts to be Replaced Adjustment

LED head Set the LED head drive time.

Set the LED head dot count. (OKIPAGE 8w only) Image Drum Unit Reset the drum counter. (Refer to User's Manual) Main control board Upload or download EEPROM data.

4.2.1 Setting LED Head Drive Time

4.2.2 Uploading and Downloading EEPROM Data

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Service Guide OKIPAGE8w

Chapter 4 Adjustment

4.2.1 Setting LED Head Drive Time Caution: When the luminous intensity of a new LED head is the same as that of the old LED head, do not set the LED

head drive time. Use "LED Head Making No." in the engine menu tab of the maintenance driver to set the luminous intensity displayed on

the LED head as the LED head drive time. (See Figure 4-2 below.)

Luminous intensity of LED headl

Figure 4-2

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Service Guide OKIPAGE8w

Chapter 4 Adjustment

4.2.2 Uploading and Downloading EEPROM Data

When the main control board is replaced, EEPROM data must be reflected on a new main control board. Use "EEPROM Operations" in the option tab of the maintenance utility to reflect EEPROM data on the new main control board.

Reflect EEPROM data on the new main control board in the following procedures: (1) Check that the printer and PC are connected by the parallel I/F, then execute the maintenance utility. (2) Click the "Option" button in "Main Menu Dialog". (3) Click the "Upload" button (Upload EEPROM Data) in "EEPROM Operations." (EEPROM data read is completed.) (4) The read EEPROM data is displayed in "Dialog" of the maintenance driver. (5) Leave the display of the maintenance driver as is and replace the main control board. (6) Click the "Download" button (Download EEPROM Data) in "EEPROM Operations". (EEPROM data write is

completed.) Depending on the level of a main control board failure (parallel I/O failure, etc.), however, EEPROM data may be unable

to be uploaded. In such a case, use the maintenance utility to perform the following adjustment after replacing the main control board:

Setting the LED head drive time (Section 4.2.1)l Setting the LED head count (OKIPAGE 8w only)l Setting specifications (ODA/OEL/INT-A/INT-L)l

Service Guide OKIPAGE8w

Chapter 5 Periodical Maintenance

5.1 Periodical Replacement Parts

Table 5-1 lists the part and unit to be replaced periodically. Table 5-1 Routine Replacement Parts

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Part Name Replacement Time Part to be Checked

Simultaneously

Toner cartridge (Type 6) When "Toner Low" is displayed. Clean LED head Consumables Image drum unit (Type 6) When "Change Drum" is displayed. See 5.2 Consumables

Caution: Also reset the drum counter when replacing the image drum unit.

Remarks

Service Guide OKIPAGE8w

Chapter 5 Periodical Maintenance

5.2 Cleaning

Remove any toner or dirt and clean the circumference and inside of the printer with a waste cloth.

Caution: Do not touch the image drum unit, LED lens array, and connector block of the LED head.

5.2.1 Cleaning the LED Lens Array

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Service Guide OKIPAGE8w

Chapter 5 Periodical Maintenance

5.2.1 Cleaning the LED Lens Array

When a white belt or a white stripe (void, light printing) occurs in the vertical direction of the print surface, clean the LED lens array or replace the toner cartridge.

Caution: Be sure to use an LED head cleaner to clean the LED lens array.

(1) Set the LED head cleaner in the LED lens array, as shown in the figure below, and slide the cleaner left and right several time to clean the head.

Caution: Do not press the LED head cleaner against the LED lens array.

Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)

Service Guide OKIPAGE8w

Chapter 6 Troubleshooting Procedures

6.1 Troubleshooting Tips

Check the basic check points written in the user's manual.1. Gather detailed failure information as much as possible from the customer.2. Check the printer under the condition close to that under which the failure occurred.3.

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Chapter 6 Troubleshooting Procedures

6.2 Check Points Before Correcting Image Problems

Is the printer running in proper ambient conditions?1. Are consumables (toner and EP image drum unit) replaced correctly?2. Are sheets of paper normal?3. Is the EP image drum unit set correctly?4.

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Chapter 6 Troubleshooting Procedures

6.3 Notes When Correcting Image Problems

Do not touch the surface of the image drum nor place foreign matter on it.1. Do not expose the image drum to direct sunlight.2. Do not touch the fuser because it heats up during operation.3. Do not expose the image drum to light for more than five minutes at room temperature.4.

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Service Guide OKIPAGE8w

Chapter 6 Troubleshooting Procedures

6.4 Preparation Before Troubleshooting

1. Message display The failure status of the OKIPAGE 4w Plus /4m is displayed on the status monitor of the PC. Take proper action

according to the message displayed on the status monitor.

2. LED display The OKIPAGE 8w is equipped with only one LED. This LED indicates one of the following status:

Printer Status LED Indication

Ready Lighting Printing in progress Blink (*1) Recoverable alarm Blink (*2) Unrecoverable alarm Blink (*3)

*1: The LED blinks at a cycle of 1 second (0.5s ON) from data reception to printing end. *2: The LED blinks at a cycle of 0.24 second (0.12s ON). *3: The LED blinks at a cycle of 0.24 second (012s ON)

Status Error (red) Manual Feed

(amber)

Ready Undefined OFF ON During suspending data processing (in OFF-LINE) (Data is left in the buffer)

During receiving data or processing data Manual request OFF Flash 2 Undefined Low toner Flash 1 OFF Undefined Warning Change drum, toner low, toner sensor (total page > 30 sheets) Error (printing Error) Buffer Overflow, Print Overrun Error Paper out, Input Jam

Error Paper Jam (Paper Size Check Error, Feed Jam, Exit Jam) Error Cover Open Flash 2 Flash 2 Flash 2 Re-power on Hardware error (fatal error) (ROM/RAM error, fuser error, thermister error and toner sensor error) (total page < 30) During printer resetting. OFF OFF Flash 2 During initializing. ON and then

During initializing EEPROM Flash 2 until

Undefined OFF Flash 1 Printing contents of buffer by

Undefined OFF Flash 2

Flash 1 Undefined Undefined

Flash 2 OFF OFF Recovered by pressing and

Flash 2 OFF OFF Recovered by pressing a switch

Flash 2 OFF OFF The printing can be continued

Flash 3 Flash 3 Flash 3 Service call even if the printer

ON and then

OFF Ready

OFF Flash 2 until Ready

Ready (amber)

ON and then OFF Flash 2 until Ready

Remarks

pressing switch two seconds. Clearing buffer by pressing switch five seconds.

releasing a switch

and the printing can be continued.

by cover open/close

cannot recover from one of these errors.

Flash 1: Slow blinking

Flash 2: Blinking Flash 3: Fast blinking

6.5 Troubleshooting

6.5.1 Status Monitor Message List

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Chapter 6 Troubleshooting Procedures

6.5.2 Status Message Troubleshooting

6.5.3 Image Troubleshooting

Service Guide OKIPAGE8w

Chapter 6 Troubleshooting Procedures

6.5.1 Status Monitor Message List

Table 6-1 lists the statuses and troubles to be displayed on the status monitor in the message format.

Table 6-1

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Category Status Message Status

Code

Normal status Warming Up 18 00 Warming-up status. Normal operation. Normal status Online (Ready) 00 10 Online (ready) status. Normal operation. Normal status Power Save Mode 00 20 Power save status. Normal operation. Normal status Toner Low 10 00 The toner amount of the

Normal status Toner Sensor 10 01 The image drum is not

Normal status Change Drum 10 02 Image drum is nearing

Normal status Manual Paper In 12 20 The paper is in the manual

Normal status Printing In Progress 14 20 Printing in progress. Normal operation.

Explanation Remedy

Normal

toner cartridge is small.

installed or the toner sensor is faulty.

end of life.

feed mode.

operation/replace the toner cartridge.

Install the image drum or replace the toner sensor.

Replace the image drum. Note: Be sure to reset the drum counter after replacing the image drum).

Normal operation.

Normal status Ejection in Progress 14 30 Ejection in progress. Normal operation. Normal status Manual Request

Executive Letter Legal 14 Legal 13 A6 A5 A4 B5 Monarch COM-10 DL C5 COM-9

16 01 16 02 16 03 16 04 16 18 16 19 16 1A 16 21 16 50 16 51 16 5A 16 5B 16 7F

Request the paper to be set in the manual feed mode.

The paper sizes are as follows: Executive, Letter, Legal 14, Legal 13, A4, A5, A6, B5, Monarch, DL, C5, COM-10, COM-9.

Set the requested paper in the manual feed mode.

Paper size error Paper Size Error 30 00 Paper of improper size

was fed. 2.52" (64 mm) L

15.77" (400.56 mm)

Check the paper. Also check whether more than one sheet of paper were fed simultaneously. To clear the error display, open the cover, then close it.

Paper jam Paper Input Jam 31 00 A paper jam occurred

when sheets of paper were being supplied.

Paper jam Paper Feed Jam 32 00 A paper jam occurred

during paper feeding.

Paper Jam Paper Exit Jam 33 00 A paper jam occurred

during paper ejection.

Cover Open Cover Open 4F 00 The upper cover is open. To clear the error

Check the paper. To release the error display, open the cover, then close it.

Open the cover, then remove the jammed paper. To clear the error display, close the cover.

Open the cover, then remove the jammed paper. To clear the error display, close the cover. If this error occurs frequently, see Section 6.5.2 2-2.

display, close the cover. If this error occurs frequently, replaced the power supply board.

Buffer overflow Page Buffer

Overflow

Buffer overflow Print Over Run 40 10 A print overrun occurred

Device configuration error

Program ROM Check Error

40 01 The page buffer

overflowed because there are a large number of print data.

because print data is complicated.

60 10 An error occurred during

program ROM check.

To release the error display, press the reset button on the status monitor of the printer driver. Install option RAM or reduce the number of print data.

To clear the error display, press the reset button on the status monitor of the printer driver. Simplify the print data format.

Replace program ROM or the main control board. (When replacing the main control board, also adjust EEPROM data).

Device configuration error

Resident RAM Check Error

60 30 An error occurred during

resident RAM check.

Replace the main control board. (When replacing the main control board, also adjust EEPROM data).

Device configuration error

EEPROM Check Error

Option RAM Check Error

Fuser Error 60 80 A heater timeout error

Thermistor Error 60 90 A thermistor error

Thermistor Open Check Error

Thermistor Short Check Error

60 40 An error occurred during

EEPROM check.

60 60 An error occurred during

option RAM check.

occurred.

60 91 The thermistor is open. Replace the

60 92 A thermistor short

occurred.

Replace the main control board. (When replacing the main control board, also adjust EEPROM data).

Check the connection of the Option RAM PC board. If the option RAM PC board is faulty, replace it.

See Section 6.52 4.

Replace the thermistor of the heater Assy.

thermistor of the heater Assy.

Replace the thermistor of the heater Assy.

Device configuration error

Watch Dog Timeout Error

60 00 A watchdog timeout

occurred.

To clear the error display, turn on the power supply again. Replace the main control board.

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Service Guide OKIPAGE8w

Chapter 6 Troubleshooting Procedures

6.5.2 Status Message Troubleshooting

Some failures cannot be corrected according to the status message trouble list. Troubleshoot these failures according to the following troubleshooting flowcharts.

Caution: When replacing the main control board troubleshooted according to the troubleshooting flowcharts, also

adjust EEPROM data.

(1) The OKIPAGE 8w malfunctions after the power supply has been turned on.

Turn the power supply off, then on again.

Is the LED lamp on?

No - Is the AC cable connected correctly?

No - Connect the AC cable correctly.

Yes - Is +5 V supplied between CN1 Pin 7 and CN1 Pin 13 of the high-voltage power supply board? (Pin 7: +5 V, Pin 13: 0 V)

No - Are the CN1 connectors of the high-voltage power supply board and main control board connected correctly?

No - Connect the CN1 connectors correctly.

Yes - Is +5 V supplied between CN2 Pin 2 and CN2 Pin 3 of the main control board? (Pin 2: +5 V, Pin 3: 0 V)

No - Replace the power supply board.

Yes - Replace the main control board.

Yes - Is 1-2 V voltage supplied between CN1 Pin 2 and CN1 Pin 13 of the high-voltage power supply board?

No - Replace the main control board.

Yes - Replace the high-voltage power supply board.

Yes - Replace the main control board.

[JAM error] (2)-1 paper input jam

Does a paper input jam occur when the power supply is turned on?

Yes - Is the jammed paper on paper sensor E?

Yes - Remove the jammed paper.

No - Is paper sensor E (manual feed/paper) operating normally?

No - Replace paper sensor E (manual feed or paper).

Yes - Replace the high-voltage power supply board.

No - Does a paper input jam occur during paper loading?

Yes - Is the paper already fed to paper sensor E (manual feed)?

Yes - Is paper sensor E (manual feed) operating normally?

Yes - Check the gear block or replace high-voltage power supply board.

No - Is the paper already fed to paper sensor E (paper)?

Yes - Is paper sensor E (paper) operating normally?

Yes - Replace high-voltage power supply board.

No - Replace the stepping roller or friction pad.

No - Is the hopping roller rotating?

Yes - Check the coil resistance of magnet H. Is the resistance normal (about 120 W)?

No - Replace magnet H.

Yes - Is +26 V supplied between CN8 Pin 1 and CN8 Pin 2 of the main control board?

No - Replace the main control board.

No - Check the gear block or replace the hopping shaft assy.

No - Are the CN7 connectors of the pulse motor (main) and main control board connected?

No - Connect the CN7 connectors correctly.

Yes - Measure the resistance of the pulse motor (main). Is the resistance normal (about 3.8 W)?

No - Replace the pulse motor (main).

Yes - Replace the main control board.

[JAM error] 2-2 Paper feed jam

Does a paper feed jam occur when the power supply is turned on?

Yes - Is the jammed paper on paper sensor E (paper/exit)?

Yes - Remove the jammed paper.

No - Is paper sensor E (exit/paper) operating normally?

No - Replace paper sensor E (exit or paper).

Yes - Replace the high-voltage power supply board.

No - Has the paper arrived at paper sensor E (paper)?

No - Is the feed roller rotating?

No - Check the gear block.

Yes - Is the EP image drum unit set correctly?

No - Set the EP image drum unit correctly.

Yes - Check the gear block.

Yes - Has the paper arrived at the paper sensor (exit)?

Yes - Is the paper sensor (exit) operating normally?

No - Replace paper sensor E (manual feed).

No - Replace paper sensor E (paper).

No - Replace the paper sensor (exit).

Yes - Replace the high-voltage power supply board.

No - Check the gear block.

(2)-3 Paper exit jam Does a paper exit jam occur when the power supply is turned on?

Yes - Is the jammed paper on the paper sensor (exit)?

Yes - Remove the jammed paper.

No - Is the paper sensor (exit) operating normally?

No - Replace the paper sensor (exit).

Yes - Replace the high-voltage power supply board.

No - Check the gear block or replace the eject roller.

(3) Paper size error

Is the paper of the specified size being use?

No - Use paper of the specified size.

Yes - Is paper sensor E (paper) operating normally?

No - Replace paper sensor E (paper) or clean the inlet sensor on the high-voltage power supply board.

Yes - Is the paper sensor (exit) operating normally?

No - Replace the paper sensor (exit) or clean the outlet sensor on the high-voltage power supply board.

Yes - Replace the high-voltage power supply board.

Paper feeding direction

(4) Heat assy error

Turn the power supply off, then on again. Does the Halogen lamp of the heat assy go on?

No - Is the Halogen lamp or thermostat disconnected?

Yes - Replace the heat assy, Halogen lamp, or thermostat.

No - Replace the power supply unit.

Yes - Are the CN2 connectors of the power supply unit and main control board connected correctly?

No - Connect the CN2 connectors correctly.

Yes - Replace the main control board.

Service Guide OKIPAGE8w

Chapter 6 Troubleshooting Procedures

6.5.3 Image Troubleshooting

Procedures for troubleshooting for the cases of abnormal image printouts are explained below. Figure 6-3 below shows typical abnormal images.

Problem Flowchart number

Images are light or blurred entirely (Figure 6-3, A ) (1) Dark background density (Figure 6-3, B ) (2) Blank paper is output (Figure 6-3, C ) (3) Vertical block belt/black stripe (Figure 6-3, D ) (4) Cyclical defect (Figure 6-3, E ) (5) Print void (6) Poor fusing (images are blurred or peeled off when touched by hands) (7) Vertical white belt/white stripe (Figure 6-3, F ) (8)

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A Light or blurred images entirely B Dark background density C Blank paper

D Black vertical stripes E Cyclical defect F White vertical belts

or streaks

Figure 6-3 Image Problems

Okidata OKIPAGE 8w Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual