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OKIPAGE 8p /8
LED Page Printer
Maintenance Manual


ODA/OEL/INT




Rev. 2 1997,11,12




All specifications are subject to change without notice.



XXXXXXXXTH
PREFACE

This Maintenance Manual describes the field maintenance methods for LED Page Printers.

This manual is written for use by service persons. Please note that you should refer to the Printer
Handbook for the handling and operating methods of the equipment.
CONTENTS
1. CONFIGURATION ..................................................................................... 1-1
1.1 System Configuration ........................................................................ 1-1
1.2 Printer Configuration .......................................................................... 1-2
1.3 Option(OKIPAGE 8p Only) ................................................................ 1-3
1.4 Specification ...................................................................................... 1-4
1.5 Safety Standards ............................................................................... 1-6
1.5.1 Certification Label .................................................................................... 1 - 6
1.5.2 Warning Label ......................................................................................... 1 - 6

2. OPERATION DESCRIPTION .................................................................... 2-1
2.1 Main Control Board ............................................................................ 2-3
2.2 Power Supply Unit ............................................................................. 2-5
2.3 High-Voltage Power Supply Board .................................................... 2-5
2.4 Electro-Photographic Processor ........................................................ 2-7
2.5 Electro-Photographic Process ........................................................... 2 - 11
2.5.1 Explanation of Each Process Operation .................................................. 2 - 13
2.6 Paper Jam Detection ......................................................................... 2 - 19
2.7 Toner Low Detection.......................................................................... 2 - 21
2.8 Cover Open ....................................................................................... 2 - 22
2.9 Detecting ID existence ....................................................................... 2 - 23

3. PARTS REPLACEMENT ........................................................................... 3-1
3.1 Precautions for Parts Replacement ................................................... 3-1
3.2 Parts Layout....................................................................................... 3-3
3.3 Replacing Parts ................................................................................. 3-7
3.3.1 Hopper Plate ........................................................................................... 3 - 7
3.3.2 LED Head and Head Spring .................................................................... 3 - 8
3.3.3 Transfer Roller ......................................................................................... 3 - 9
3.3.4 Upper Cover Assy ................................................................................... 3 - 10
3.3.5 High-Voltage Power Supply Board (P2H/ P6L) ....................................... 3 - 11
3.3.6 Top Cover Assy and Flat Cable Assy ...................................................... 3 - 12
3.3.7 Paper Holder ........................................................................................... 3 - 13
3.3.8 Side Plate M and Idle Gear ..................................................................... 3 - 14
3.3.9 Heat Assy ................................................................................................ 3 - 15
3.3.10 Drive Shaft E (Eject) and Eject Roller ..................................................... 3 - 18
3.3.11 Pressure Roller B (Back Up Roller) ......................................................... 3 - 19
3.3.12 Separator Guide ...................................................................................... 3 - 20
3.3.13 Pulse Motor (Main) .................................................................................. 3 - 23
3.3.14 Hopping Shaft Assy ................................................................................. 3 - 24
3.3.15 Resist Roller ............................................................................................ 3 - 25
3.3.16 Paper Sensor E, Paper Sensor Exit and Toner Sensor Assy ................. 3 - 26
3.3.17 Base Plate ............................................................................................... 3 - 27
4. ADJUSTMENT ........................................................................................... 4 - 1
4.1 Adjustment Types and Functions ...................................................... 4 - 1
4.1.1 Printer Driver ........................................................................................... 4 - 1
4.1.2 Engine Maintenance Utility ...................................................................... 4 - 2
4.2 Adjustment When Replacing a Part ................................................... 4 - 2
4.2.1 Setting LED Head Drive Time ................................................................. 4 - 2
4.2.2 Uploading and Downloading EEPROM Data .......................................... 4 - 3

5. PERIODICAL MAINTENANCE ................................................................. 5 - 1
5.1 Periodical Replacement Parts ........................................................... 5 - 1
5.2 Cleaning............................................................................................. 5 - 1
5.2.1 Cleaning the LED Lens Array .................................................................. 5 - 1

6. TROUBLESHOOTING PROCEDURES .................................................... 6-1
6.1 Troubleshooting Tips ......................................................................... 6-1
6.2 Check Points Before Correcting Image Problems ............................. 6-1
6.3 Notes When Correcting Image Problems .......................................... 6-1
6.4 Preparation Before Troubleshooting .................................................. 6-1
6.5 Troubleshooting ................................................................................. 6-3
6.5.1 Status Monitor Message List ................................................................... 6 - 3
6.5.2 Status Message Troubleshooting ............................................................ 6 - 7
6.5.3 Image Troubleshooting ............................................................................ 6 - 13

7. WIRING DIAGRAM ................................................................................... 7 - 1
7.1 (a)Interconnect Signal Diagram (OKIPAGE 8p) ................................ 7 - 1
7.1 (b)Interconnect Signal Diagram (OKIPAGE 8w) ................................ 7 - 2
7.2.1 Main Control board (NMA PCB)(OKIPAGE 8p) ...................................... 7 - 3
7.2.2 Main Control board (NMA PCB)(OKIPAGE 8w) ...................................... 7 - 4
7.2.3 High-Voltage Power Sapply Board .......................................................... 7 - 5

8. PARTS LIST .............................................................................................. 8 - 1


APPENDIX A LOCAL PRINTING .............................................................. A-1
APPENDIX B PARALLEL INTERFACE ................................................... B-1
APPENDIX C MACINTOSH INTERFACE ................................................. C-1
APPENDIX D DETAIL OF EACH FUNCTION .......................................... D-1
1. CONFIGURATION
1. CONFIGURATION

1.1 System Configuration

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




ENGINE UNIT




Paper Feed Mechanism


Hopper
Plate

Electro-photographic
Processor




Main High-Voltage
Power Supply Board

Sub High-Voltage
PowerSupply Board




Power Supply Unit




Figure 1-1
,
Main Control Board




4MB Memory
Expansion Board
(OKIPAGE 8p Only)




1-1
1.2 Printer Configuration

The printer unit consists of the following five hardware components: