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OKIPAGE 4 /4
LED Page Printer
Maintenance Manual
OEL/INT
Approval
All specifications are subject to change without notice.
40245101TH
HP, LaserJet and PCL5e are trademarks of Hewlett-Packard Co.
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 ................................................................................................. 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 ............................................................................ 2-4
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
3. PARTS REPLACEMENT ........................................................................... 3-1
3.1 Precautions for Parts Replacement ................................................... 3-1
3.2 Parts Layout....................................................................................... 3-3
3.3 Replacing Parts ................................................................................. 3-6
3.3.1 Hopper Plate ........................................................................................... 3 - 6
3.3.2 LED Head and Head Spring .................................................................... 3 - 7
3.3.3 Transfer Roller ......................................................................................... 3 - 8
3.3.4 Upper Cover Assy ................................................................................... 3 - 9
3.3.5 High-Voltage Power Supply Board .......................................................... 3 - 10
3.3.6 Top Cover Assy and Flat Cable Assy ...................................................... 3 - 11
3.3.7 Paper Holder ........................................................................................... 3 - 12
3.3.8 Side Plate M and Idle Gear ..................................................................... 3 - 13
3.3.9 Heat Assy ................................................................................................ 3 - 14
3.3.10 Drive Shaft E (Eject) and Eject Roller ..................................................... 3 - 17
3.3.11 Pressure Roller B (Back Up Roller) ......................................................... 3 - 18
3.3.12 Separator Guide ...................................................................................... 3 - 19
3.3.13 Pulse Motor (Main) .................................................................................. 3 - 21
3.3.14 Hopping Shaft Assy ................................................................................. 3 - 22
3.3.15 Resist Roller ............................................................................................ 3 - 23
3.3.16 Paper Sensor E, Paper Sensor Exit and Toner Sensor Assy ................. 3 - 24
3.3.17 Base Plate ............................................................................................... 3 - 25
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 - 3
4.2 Adjustment When Replacing a Part ................................................... 4 - 3
4.2.1 Setting LED Head Drive Time ................................................................. 4 - 3
4.2.2 Setting the LED Head Dot Count ............................................................ 4 - 4
4.2.3 Uploading and Downloading EEPROM Data .......................................... 4 - 5
5. PERIODICAL MAINTENANCE ................................................................. 5 - 1
5.1 Periodical Replacement Parts ........................................................... 5 - 1
5.2 Cleaning............................................................................................. 5 - 1
5.2.1 Cleaning of 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 ................................................................................. 6-2
6.5.1 Status Monitor Message List ................................................................... 6 - 2
6.5.2 Status Message Troubleshooting ............................................................ 6 - 6
6.5.3 Image Troubleshooting ............................................................................ 6 - 13
7. WIRING DIAGRAM ................................................................................... 7 - 1
7.1 Interconnect Signal Diagram ............................................................. 7 - 1
7.2 PCB Layout ........................................................................................ 7 - 3
7.2.1 Main Control Board (HBMC-2 PCB)(OKIPAGE 4w plus) ........................ 7 - 3
7.2.2 Main Control Board (HBMC-3 PCB)(OKIPAGE 4m) ............................... 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 MAINTENANCE UTILITY ..................................................... D-1
1. CONFIGURATION
1. CONFIGURATION
1.1 System Configuration
The OKIPAGE 4w Plus/4m 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
High-Voltage Power
Supply Board
Power Supply Unit
Figure 1-1
,
Main Control Board
*2MB Memory
Expansion Board
*: Option (OKIPAGE 4m Only)
1-1
1.2 Printer Configuration
The printer unit consists of the following five hardware components: