Text preview for : Okipage 8w service manual.pdf part of Oki 8W Service manual
Back to : Okipage 8w service manual | Home
Service Guide OKIPAGE8w
Chapter 0 Introduction
Front Cover
OKIPAGE 8w LED PAGE PRINTER
Adobe Acrobat printable reference copy of the OKIDATA Service Training Manual. 05/17/99 Note: This Adobe Acrobat version of the Okidata Service Training Manual was built with the pictures rendered at 300 dpi, which is ideal for printing, but does not display well on most displays.
Table of Contents
Page
Service Guide OKIPAGE8w
0 Introduction Preface 1 Configuration Configuration ....1.1 System Configuration ....1.2 Printer Configuration ....1.3 Specification ....1.4 Safety Standards ........1.4.1 Certification Label ........1.4.2 Warning Label 2 Operation Description 2.0 Operation Description 2.1 Main Control Board 2.2 Power Supply Unit 2.3 High-Voltage Power Supply Board 2.4 Electro-Photographic Processor 2.5 Electro-Photographic Process ....2.5.1 Explanation of Each Process Operation 2.6 Paper Jam Detection 2.7 Toner Low Detection 2.8 Cover Open 2.9 Detecting ID existence 3 Parts Replacement Parts Replacements ....3.1 Precautions for Parts Replacement ....3.2 Parts Layout ........Upper Cover Assy ........Base Frame Unit ........Base Plate Unit ....3.3 Replacing Parts ........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 ........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 4 Adjustment
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
Table of Contents
Page
4.0 Adjustment ....4.1 Adjustment Types and Functions ........4.1.1 Printer Driver ........4.1.2 Engine Maintenance Utility ....4.2 Adjustment When Replacing a Part ........4.2.1 Setting LED Head Drive Time ........4.2.2 Uploading and Downloading EEPROM Data 5 Periodical Maintenance 5.1 Periodical Replacement Parts 5.2 Cleaning ....5.2.1 Cleaning the LED Lens Array 6 Troubleshooting Procedures 6.1 Troubleshooting Tips 6.2 Check Points Before Correcting Image Problems 6.3 Notes When Correcting Image Problems 6.4 Preparation Before Troubleshooting 6.5 Troubleshooting ....6.5.1 Status Monitor Message List ....6.5.2 Status Message Troubleshooting ....6.5.3 Image Troubleshooting ........(1) An image is light or blurred entirely ........(2) Dark background density ........(3) A blank paper is output ........(4) Vertical black belt/stripe ........(5) Cyclic defect ........(6) A blank paper is output ........(7) Poor fusing ........(8) Vertical white belt/stripe ........Contents - Figure 6-4 ........Contents - Figure 6-5 7 Wiring Diagram 7.1 Interconnect Signal Diagram 7.2 PCB Layout ....7.2.1 Main Control Board (HBY PCB) ....7.2.2 High-Voltage Power Supply Board 8 Parts List Cover Assy Upper Base Frame Unit Heat Assy Base Plate Unit A Local Printing Local Printing B Parallel Interface Parallel Interface C Maintenance Utility Outline of Maintenance Utility Detail of Each Function ....4.1 Engine Menu Setting ....4.2 Engine Counter ....4.3 Printer Status
44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
Table of Contents
Page
....4.4 Test Print ....4.5 Option ....4.6 About ....4.7 Reload .... 4.8 Exit
87 88 89 90 91
Page: 1
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.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 2
Service Guide OKIPAGE8w
Chapter 1 Configuration
Configuration System Configuration Printer Configuration Specification Safety Standards
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 3
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
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 4
Service Guide OKIPAGE8w
Chapter 1 Configuration
1.2 Printer Configuration
The printer unit consists of the following five hardware components:
l l l l l
Electro-Photographic Processor Paper Feeder Main Control Board High-Voltage Power Supply Board Power Supply Unit
Figure 1-2 is the configuration of the printer unit.
Figure 1-2
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 5
Service Guide OKIPAGE8w
Chapter 1 Configuration
1.3 Specification
(1) (2)
Type: Outside dimensions (excludes protruding portion) Weight
Desktop Height: 5.9" (150 mm) Width 12.2" (310 mm) Depth 7.5" (191mm) 9.3 lbs. (4.2 kg)
(3) (4)
Development method Dry non-magnetic development system Exposure method LED stationary head Paper used l Standard paper - Xerox 4200 (20 lbs) l Application paper (manual face-up feed) - Label - Envelope - OHP paper (Transparency) 14" (355.6 mm) (Max.) x 8.5" (215.9 mm) 2 Automatic feed: 16 to 28 lbs (60 to 105 g/m ) - Manual feed: Label, Envelope, OHP paper (transparency)
(5)
(6)
Printing speed:
First print: 23 seconds (A4) (after warm-up) Continuous print: 8 sheets/minute (A4) Warm-up time: 40 seconds (120 VAC for ODA, 230 VAC for o o OEL/INT) (at room temperature 77 F (25 C)
(7) (8) (9)
Paper feeding method Automatic paper feed or manual paper feed Paper delivery method Resolution Face down 600 dpi x 600 dpi (true) 230 VAC +/-10% (for OEL/INT) 120 VAC +/-15% for (ODA) Peak: Approx. 450W Typical operation: Approx. 100W Idle: Approx. 30W Power save mode: Approx. 5W
(10) Power input
(11) Power consumption
(12) Temperature and humidity
During operation In storage
Temperature o 10 to 32 C o -10 to +43 C
Humidity 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 Toner cartridge kit - 1,500 (5% duty) ---- 45g cartridge kit Image drum cartridge - 10,000 (at continuous printing)
(14) Consumables
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 6
Service Guide OKIPAGE8w
Chapter 1 Configuration
1.4 Safety Standards 1.4.1 Certification Label 1.4.2 Warning Label
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 7
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:
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 8
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.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 9
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
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 10
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 DRAM controller DMA controller Function Controls DRAM. Transfers image data from Parallel I/F to DRAM, from DRAM to a video output port and between CPU and DRAM. Controls the parallel interface. Controls LED head.
Parallel interface controller Video output port LED STB output port Timer
Generates various control timings for monitoring paper feeding and a paper size. Inputs and outputs the sensor signals and motor signals, etc. Also performs I/O for EEPROM. Inputs the feedback signals from a high-voltage generation circuit and thermistor signal.
I/O Port
A/D converter
(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 EEPROM holds the following data:
l l
Menu data Counter value
l
Adjustment value
(5) Parallel interface The parallel interface receives parallel data from the host; it conforms to the IEEE1284 specification.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 11
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 +26 V
Used to generate a logic circuit and a high voltage. used to drive the motor and electromagnetic clutch.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 12
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 DB SB CB TR
-1.3 KV -265 V/+265 V -520 V/ 0 V +400 V/-1.3 KV +500 V ~ +3.5 KV/-750 V
Voltage to be applied to charge roller. Voltage to be applied to a developing roller. Voltage to be applied to a sponge roller. Voltage to be applied to a cleaning roller. 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. Detects the leading part of the paper. Monitors paper feeding. Monitors paper feeding and the paper size according to the paper sensor arrival and passing time. Detects the low toner status.
ON: Paper exists. OFF: No paper exists. ON: Paper exists. OFF: No paper exists. ON: Paper exists. OFF: No paper exists. ON (long): Toner low. OFF (short): Toner high.
Paper sensor
Output sensor
Toner sensor
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 13
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 Reverse rotation Reverse rotation
OFF ON OFF
Non-rotation Rotation Non-rotation
Non-rotation Rotation Rotation
Rotation Rotation Rotation
Warm-up Hopping 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. 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.
(2)
Reverse rotation of pulse motor (main):
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 14
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. 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. 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. 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. 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. Fusing - The transferred unfused toner image is fused to a sheet of paper by applying heat and pressure to the image.
(2)
(3)
(4)
(5)
(6)
Figure 2-5 shown below is a flow for the electro-photographic process.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 15
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
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.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 16
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 Paper inlet jam
Cause of Error - 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. - The leading part of the paper does not reach the outlet sensor within a fixed time after it has passed the paper sensor. - 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 feed jam Paper outlet jam
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 Paper feed error Supervisory Sensor Electromagnetic clutch ON/Paper sensor ON Paper sensor ON/ Outlet sensor ON Paper sensor ON/ Paper sensor OFF Outlet sensor ON/ Outlet sensor OFF
Outlet sensor OFF/ Outlet sensor OFF
Reference Value Plus 69.8 35
Error Minus _
Paper feed jam 1 Paper size error
122.9 2.52" (64 mm) <= L <= 15.77" (400.56 mm) 2.52" (64 mm) <= L <= 15.77" (400.56 mm)
121.9
20.0 _
_ _
Paper outlet jam
45.0
45.0
Paper feed jam 2
20.0
20.0
Unit: mm
Timing Chart for Paper Feed (Tray Feed)
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 17
Service Guide OKIPAGE8w
Chapter 2 Operation Description
2.7 Toner Low Detection
l
Hardware configuration of toner sensor
The figure below shows the hardware configuration of the toner sensor.
Hardware Configuration of Toner Sensor
l
Toner detection method
(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 Toner low time Toner full time
2.5 sec. t1 > 0.6 sec. 0.6 > t1 > 0.14 sec.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 18
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.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 19
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. 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 Invalid condition In the case of 31 pages or more in total drum counter 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.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 20
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
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 21
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 (|).
(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
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 22
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
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 23
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
Upper Cover Assy
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 24
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
Base Frame Unit
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 25
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
Base Plate Unit
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 26
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 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
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 27
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
3.3.1 Hopper Plate
1.
Remove two claws and dismount hopper plate (1).
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 28
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
3.3.2 LED Head and Head Spring
1. 2. 3.
Open top cover assy (1). Dismount the left clamp and LED head (2). Then, dismount flat cable assy (3). Dismount two head springs (4).
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 29
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
3.3.3 Transfer Roller
1. 2.
Open top cover assy (1) and dismount the image drum unit (Type 6) (2). Remove the right claw. Then, dismount transfer roller (3), two regist bearings (4), and gear T (5).
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 30
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
3.3.4 Upper Cover Assy
1. 2. 3. 4. 5. 6. 7.
Turn off the power switch and unplug the AC cord from the AC socket. Disconnect interface cable (1). Open top cover assy (2) and dismount the image drum unit (Type 6) (3). Move paper guide (L) (4) and paper guide (R) (5) on the rear of the printer to the center. Remove two front claws of upper cover assy (6) and lift upper cover assy (6). Dismount spur gear (A) (7), guide slide (L) (8), and guide slide (R) (9). Dismount lamp (10).
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 31
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
3.3.5 High-Voltage Power Supply Board (P2H/P6L)
1. 2. 3.
Dismount upper cover assy. (See Section 3.3.4.) Remove three screws (1) and remove the cover (2) and draw out high-voltage power supply board (3). Disconnect all the cables (4) from high-voltage power supply board (3) and dismount high-voltage power supply board (3).
Caution: Note the following when assembling the high-voltage power supply board:
l l
Mount the high-voltage power supply board with top cover assy removed or open. Take care that cable 4 will not interfere with the paper sensor exit when it is connected.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 32
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
3.3.6 Top Cover Assy and Flat Cable Assy
1. 2. 3. 4.
Dismount the upper cover assy. (See Section 3.3.4.) Dismount the LED head. (See Section 3.3.2.) Press the left clamp outward and dismount the engagement and top cover assy (1). (Tension spring (2) also comes off at the same time.) Disconnect connector CN6 and dismount flat cable assy (3).
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 33
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
3.3.7 Paper Holder
1. 2. 3. 4. 5.
Dismount the upper cover assy.(See Section 3.3.4.) Dismount paper holder (1). Unlock and dismount paper guide (L) (2) and paper guide (R) (3). Remove the claw and dismount hopper spring (4). Remove the claw and dismount stopper spring (5).
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 34
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. 1. 2. 3. Dismount the upper cover assy. (See Section 3.3.4.) Remove two screws (1) and two claws, then dismount plate side M(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), idle gear R (9) and Gear R (10).
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 35
Service Guide OKIPAGE8w
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).
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 36
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
3.3.10 Drive Shaft E (Eject) and Eject Roller
1. 2. 3. 4. 5.
Dismount the upper cover assy. (See Section 3.3.4.) Dismount top cover assy. (See Section 3.3.6.) Remove two screws (1) from heat assy (Section 3.3.9), life the heat assy, and dismount idle gear E (A) (2) and idle gear E (B) (3). Unlock and dismount drive shaft E (Eject) (4). Dismount two eject rollers (5).
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 37
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
3.3.11 Pressure Roller B (Back Up Roller)
1. 2. 3. 4.
Dismount the upper cover assy. (See Section 3.3.4.) Dismount the high-voltage power supply board. (See Section 3.3.5.) Dismount the heat assy. (Section 3.3.9) Dismount the engagement with the left ground, then pressure roller B (1). (Two bearing BUs (2) and two bias springs (3) also come off at the same time.)
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 38
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). 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). 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
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 39
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
3.3.13 Pulse Motor (Main)
1. 2. 3. 4. 5.
Dismount the upper cover assy. (See Section 3.3.4.) Dismount the high-voltage power supply board. (See Section 3.3.5.) Dismount side plate M. (See Section 3.3.8.) Dismount the base frame. (See Section 3.3.12.) Remove two screws (1) and dismount pulse motor (main) (2).
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 40
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
3.3.14 Hopping Shaft Assy
1. 2. 3. 4. 5. 6. 7. 8.
Dismount the upper cover assy. (See Section 3.3.4.) Dismount the high-voltage power supply board. (See Section 3.3.5.) Dismount the base frame. (See Section 3.3.12.) Dismount the paper holder assy. (See Section 3.3.7.) Dismount the sheet guide. (See Section 3.3.12.) Dismount side plate M. (See Section 3.3.8.) Raise up roller holder (3), slide hopping shaft assy (1), and dismount roller holder (3) and hopping roller (4). (Knock 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).
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 41
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
3.3.15 Resist Roller
1. 2. 3.
Dismount the upper cover assy. (See Section 3.3.4.) Dismount Idle gear R (3) and Gear R (4). Move resist roller (1) to the right and dismount it by lifting. (Two resist bearings (2) also come off at the same time. Take care not to lose them.)
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 42
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
3.3.16 Paper Sensor E, Paper Sensor Exit and Toner Sensor Assy
1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Dismount the upper cover assy. (See Section 3.3.4.) Dismount the high-voltage power supply board. (See Section 3.3.5.) Dismount the base frame. (See Section 3.3.12.) Dismount the paper holder assy. (See Section 3.3.7.) Dismount the sheet guide. (See Section 3.3.12.) Dismount the heat assy. (Section 3.3.9) Dismount drive shaft E. (See Section 3.3.10.) Dismount paper sensor E (1). Dismount paper sensor exit (2). Dismount toner sensor assy (3).
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 43
Service Guide OKIPAGE8w
Chapter 3 Parts Replacement
3.3.17 Base Plate
1. 2. 3. 4. 5. 6. 7.
Dismount the upper cover assy. (See Section 3.3.4.) Dismount the base frame. (See Section 3.3.12.) Remove two screws (1), disconnect connector (2), and dismount power supply unit (3). Dismount insulation sheet (4). Remove five screws (5) and dismount main control board (6). Remove screw (7) , disconnect connector (8) and dismount P6L board (9) from base plate (10). Dismount insulation sheet (11).
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 44
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
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 45
Service Guide OKIPAGE8w
Chapter 4 Adjustment
4.1 Adjustment Types and Functions 4.1.1 Printer Driver 4.1.2 Engine Maintenance Utility
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 46
Service Guide OKIPAGE8w
Chapter 4 Adjustment
4.1.1 Printer Driver
(For Microsoft Windows) This printer driver has the following functions:
l l
Drum counter reset Charge roller cleaning
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."
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 47
Service Guide OKIPAGE8w
Chapter 4 Adjustment
4.1.2 Engine Maintenance Utility
See Appendix C.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 48
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) Reset the drum counter. (Refer to User's Manual) Upload or download EEPROM data.
Image Drum Unit Main control board
4.2.1 Setting LED Head Drive Time 4.2.2 Uploading and Downloading EEPROM Data
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 49
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.)
l
Luminous intensity of LED head
Figure 4-2
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 50
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:
l l l
Setting the LED head drive time (Section 4.2.1) Setting the LED head count (OKIPAGE 8w only) Setting specifications (ODA/OEL/INT-A/INT-L)
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 51
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
Part Name Replacement Time Part to be Checked Simultaneously Remarks
Toner cartridge (Type 6) Image drum unit (Type 6)
When "Toner Low" is displayed. When "Change Drum" is displayed.
Clean LED head See 5.2
Consumables Consumables
Caution: Also reset the drum counter when replacing the image drum unit.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 52
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
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 53
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.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner
Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 54
Service Guide OKIPAGE8w
Chapter 6 Troubleshooting Procedures
6.1 Troubleshooting Tips
1. 2. 3.
Check the basic check points written in the user's manual. Gather detailed failure information as much as possible from the customer. Check the printer under the condition close to that under which the failure occurred.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 55
Service Guide OKIPAGE8w
Chapter 6 Troubleshooting Procedures
6.2 Check Points Before Correcting Image Problems
1. 2. 3. 4.
Is the printer running in proper ambient conditions? Are consumables (toner and EP image drum unit) replaced correctly? Are sheets of paper normal? Is the EP image drum unit set correctly?
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 56
Service Guide OKIPAGE8w
Chapter 6 Troubleshooting Procedures
6.3 Notes When Correcting Image Problems
1. 2. 3. 4.
Do not touch the surface of the image drum nor place foreign matter on it. Do not expose the image drum to direct sunlight. Do not touch the fuser because it heats up during operation. Do not expose the image drum to light for more than five minutes at room temperature.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 57
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 Printing in progress Recoverable alarm Unrecoverable alarm
Lighting Blink (*1) Blink (*2) 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 (amber) Remarks
Ready Undefined During suspending data Undefined processing (in OFF-LINE) (Data is left in the buffer) During receiving data or processing data Manual request Low toner 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 Hardware error (fatal error) (ROM/RAM error, fuser error, thermister error and toner sensor error) (total page < 30) During printer resetting. During initializing. During initializing EEPROM Undefined OFF Flash 1 Flash 1
OFF OFF
ON Flash 1
Printing contents of buffer by pressing switch two seconds. Clearing buffer by pressing switch five seconds.
OFF Flash 2 OFF Undefined
Flash 2 Undefined Undefined Undefined
Flash 2
OFF
OFF
Recovered by pressing and releasing a switch Recovered by pressing a switch and the printing can be continued. The printing can be continued by cover open/close Re-power on Service call even if the printer cannot recover from one of these errors.
Flash 2
OFF
OFF
Flash 2
OFF
OFF
Flash 2 Flash 3
Flash 2 Flash 3
Flash 2 Flash 3
OFF ON and then OFF Flash 2 until Ready
OFF ON and then OFF Flash 2 until Ready
Flash 2 ON and then OFF Flash 2 until Ready
Flash 1: Slow blinking
Flash 2: Blinking Flash 3: Fast blinking
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 58
Service Guide OKIPAGE8w
Chapter 6 Troubleshooting Procedures
6.5 Troubleshooting
6.5.1 Status Monitor Message List 6.5.2 Status Message Troubleshooting 6.5.3 Image Troubleshooting
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 59
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 Category Status Message Status Code Explanation Remedy
Normal status Normal status Normal status Normal status
Warming Up Online (Ready) Power Save Mode Toner Low
18 00 00 10 00 20 10 00
Warming-up status. Online (ready) status. Power save status. The toner amount of the toner cartridge is small.
Normal operation. Normal operation. Normal operation. Normal 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
Toner Sensor
10 01
The image drum is not installed or the toner sensor is faulty. Image drum is nearing end of life.
Normal status
Change Drum
10 02
Normal status
Manual Paper In
12 20
The paper is in the manual feed mode. Printing in progress. Ejection in progress. 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.
Normal status Normal status Normal status
Printing In Progress Ejection in Progress Manual Request Executive Letter Legal 14 Legal 13 A6 A5 A4 B5 Monarch COM-10 DL C5 COM-9
14 20 14 30
Normal operation. Normal operation. Set the requested paper in the manual feed mode.
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
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. 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. To clear the error display, close the cover. If this error occurs frequently, replaced the power supply board. 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).
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.
Buffer overflow
Page Buffer Overflow
40 01
The page buffer overflowed because there are a large number of print data.
Buffer overflow
Print Over Run
40 10
A print overrun occurred because print data is complicated.
Device configuration error
Program ROM Check Error
60 10
An error occurred during program ROM check.
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). 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.
Device configuration error
EEPROM Check Error
60 40
An error occurred during EEPROM check.
Device configuration error
Option RAM Check Error
60 60
An error occurred during option RAM check.
Device configuration error Device configuration error
Fuser Error
60 80
A heater timeout error occurred. A thermistor error occurred.
Thermistor Error
60 90
Replace the thermistor of the heater Assy. Replace the thermistor of the heater Assy. Replace the thermistor of the heater Assy. To clear the error display, turn on the power supply again. Replace the main control board.
Device configuration error
Thermistor Open Check Error
60 91
The thermistor is open.
Device configuration error
Thermistor Short Check Error
60 92
A thermistor short occurred.
Device configuration error
Watch Dog Timeout Error
60 00
A watchdog timeout occurred.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 60
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? No - Replace paper sensor E (manual feed). 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? No - Replace paper sensor E (paper). 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 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.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 61
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 ) Dark background density (Figure 6-3, B ) Blank paper is output (Figure 6-3, C ) Vertical block belt/black stripe (Figure 6-3, D ) Cyclical defect (Figure 6-3, E ) Print void Poor fusing (images are blurred or peeled off when touched by hands) Vertical white belt/white stripe (Figure 6-3, F )
(1) (2) (3) (4) (5) (6) (7) (8)
A Light or blurred images entirely
B Dark background density
C Blank paper
D Black vertical stripes Figure 6-3 Image Problems
E Cyclical defect
F White vertical belts or streaks
Copyright 1998, Okidata, Division of OKI America, Inc. All rights r