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OKIPAGE24DX / OKIPAGE24dx
LED Page Printer
Maintenance Manual

ODA/ OEL/ INT

1999.5.31 Rev. 1

40930701TH Rev. 1 1 / 237
PREFACE

This maintenance manual describes the field maintenance methods for OKIPAGE24DX/OKIPAGE24dx.

This manual is written for use by maintenance personnel. Note, however, that the user should refer to
the USER'S MANUAL for methods of handling and operating the equipment.

40930701TH Rev. 1 2/
CONTENTS
1. CONFIGURATION ....................................................................................... 7
1.1 System Configuration................................................................................................. 7
1.2 Printer Configuration .................................................................................................. 8
1.3 Optional Configuration ............................................................................................... 9
1.4 Specification ............................................................................................................... 11
1.5 Safety Standards ....................................................................................................... 13
1.5.1 Certification label .......................................................................................... 13
1.5.2 Warning label ................................................................................................ 13

2. OPERATION DESCRIPTION ...................................................................... 14
2.1 Main Control Board (BOARD-FFF) ............................................................................ 16
2.2 Power Supply Unit ..................................................................................................... 20
2.3 Electro-photographic Process .................................................................................... 22
2.3.1 Electro-photographic process mechanism ................................................... 22
2.3.2 Electro-photographic process ....................................................................... 24
2.4.3 Process operation descriptions .................................................................... 28
2.3.4 Revision of LED Head Illumination ............................................................... 39
2.4 Paper Jam Detection ................................................................................................. 47
2.5 Cover Open ................................................................................................................ 48
2.6 Toner Low Detection .................................................................................................. 49
2.7 Stacker-full Detection ................................................................................................. 51
2.8 Page Size Detection .................................................................................................. 51

3. PARTS REPLACEMENT ............................................................................. 52
3.1 Precautions for Parts Replacement ........................................................................... 52
3.2 Parts Layout ............................................................................................................... 54
Figure 3-4 .................................................................................................................. 57
3.3 How to Change Parts ................................................................................................. 58
3.3.1 Face -up Stacker Assy ................................................................................. 59
3.3.2 Contact Assy ................................................................................................ 60
3.3.3 DC Fan Motor ............................................................................................... 61
3.3.4 OP Panel Assy ............................................................................................. 62
3.3.5 Board-FFF .................................................................................................... 63
3.3.6 Stacker Assy, Damper Arm, Cover Rear ..................................................... 64
3.3.7 Sensor Stacker Full ...................................................................................... 65
3.3.8 Cable cover (guide film) ................................................................................ 66
3.3.9 Damper ......................................................................................................... 67
3.3.10 Feeder Unit-Front ......................................................................................... 68
3.3.11 Roller Assy-Regist ........................................................................................ 69
3.3.12 Motor -Main .................................................................................................. 70
3.3.13 Guide Assy-Eject .......................................................................................... 72
3.3.14 Heat Assy ..................................................................................................... 73
3.3.15 Roller feed (C) ............................................................................................. 74
3.3.16 Roller Assy-BK ............................................................................................. 75
3.3.17 Roller Assy-Feed .......................................................................................... 76
3.3.18 LED Head ..................................................................................................... 77
3.3.19 Paper cassette, ROLLER Ass-Feed, ROLLER-Assy-Hoppibg ..................... 78
3.3.20 Frame Assy-Separation ................................................................................ 79
3.3.21 Transfer Roller/TR Gear/TR Bearing ............................................................ 80
3.3.22 EP lock shaft ................................................................................................. 81
3.3.23 LEVER Assy- Out Sensor ............................................................................. 82
3.3.24 Toner sensor lever ........................................................................................ 83
3.3.25 Paper sensor lever ....................................................................................... 84
3.3.26 Inlet sensor lever .......................................................................................... 85

40930701TH Rev. 1 3/
3.3.27 Power supply unit ......................................................................................... 86
3.3.28 Lever-Paper end & Lever-Paper near end ................................................... 87
3.3.29 Guide Assy-Cassette (L) .............................................................................. 89
3.3.30 Guide Assy-Cassette (R) .............................................................................. 90
3.3.31 Removing/Installing Duplex Unit ................................................................... 92
3.3.32 Board-LEX .................................................................................................... 94
3.3.33 Connector (IMSA-9714N-14A) ..................................................................... 95
3.3.34 Photo Sensor ................................................................................................ 96
3.3.35 SOLENOID Assy .......................................................................................... 97
3.3.36 Motor ............................................................................................................ 98

4. ADJUSTMENT ............................................................................................. 99
4.1 Maintenance Modes And Functions ........................................................................... 99
4.1.1 User maintenance mode .............................................................................. 101
4.1.2 System maintenance mode .......................................................................... 105
4.1.3 Engine maintenance mode ........................................................................... 107
4.1.4 EEPROM initialization .................................................................................. 111
4.2 Adjustment When Replacing A Part ........................................................................... 112
4.2.1 Resetting the fuser counter .......................................................................... 113
4.2.2 Destination setting ........................................................................................ 114
4.2.3 Setting of LED head drive time ..................................................................... 115

5. PERIODIC MAINTENANCE ........................................................................ 118
5.1 Periodic Replacing Part ............................................................................................. 118
5.2 Cleaning ..................................................................................................................... 118
5.2.1 Cleaning of LED lens array ........................................................................... 118
5.2.2 Cleaning the Plastic Film .............................................................................. 119

6. TROUBLESHOOTING PROCEDURES ...................................................... 120
6.1 Troubleshooting Tips ................................................................................................. 120
6.2 Points to Check before Correcting Image Problems .................................................. 120
6.3 Tips for Correcting Image Problems .......................................................................... 120
6.4 Preparation for Troubleshooting ................................................................................ 121
6.5 Troubleshooting Flow................................................................................................. 121
6.5.1 LCD status message/trouble list ................................................................... 121
6.5.2 LCD message troubleshooting ..................................................................... 133
6.5.3 Image troubleshooting .................................................................................. 154

7. WIRING DIAGRAM ..................................................................................... 165
7.1 Interconnect Signal Diagram...................................................................................... 165
7.2 PCB Layout ................................................................................................................ 167
7.3 Resistance Check ...................................................................................................... 170
7.4 Program/Font ROM Location ..................................................................................... 172

8. PARTS LIST ................................................................................................ 174

40930701TH Rev. 1 4/
APPENDIX A CENTRONICS PARALLEL INTERFACE .................................... 185
APPENDIX B RS-232C SERIAL INTERFACE ................................................... 189
APPENDIX C SECOND/ THIRD PAPER FEEDER MAINTENANCE ................. 191
1. OUTLINE ................................................................................................................... 191
1.1 Functions ...................................................................................................... 191
1.2 Appearance and Parts Name ....................................................................... 191
2. Description of operartion ............................................................................................ 192
2.1 Driving Mechanism ....................................................................................... 192
2.2 Hopper Mechanism ...................................................................................... 194
3. PARTS REPLACEMENT ........................................................................................... 195
3.1 Precautions Concerning Parts Replacement ................................................ 195
3.2 Parts Layout ................................................................................................. 197
3.3 Parts Replacement Methods ........................................................................ 198
3.3.1 Roller assy hopping, Roller assy feed ............................................. 199
3.3.2 Cover front assy .............................................................................. 200
3.3.3 Board-BBB ...................................................................................... 201
3.3.4 Lever paper end, Lever paper near end .......................................... 202
3.3.5 Motor ............................................................................................... 203
3.3.6 Connector (IMSA-9714N-14B), Connector (IMSA-9714N-14A) ...... 204
3.3.7 Frange pulley, pulley Idle, Mini pitch belt, Plate Earth shaft,
Gear double, Tray switch assy ........................................................ 205
3.3.8 Roller feed ....................................................................................... 206
3.3.9 Bracket sub roller ............................................................................ 207
3.3.10 Frame side (L) assy ........................................................................ 208
3.3.11 Frame side (R) assy ........................................................................ 209
4. TROUBLESHOOTING ............................................................................................... 210
4.1 Precautions Prior to the Troubleshooting ..................................................... 210
4.2 Preparations for the Troubleshooting ........................................................... 210
4.3 Troubleshooting Method ............................................................................... 211
4.3.1 LCD Status Message List ................................................................ 211
4.3.2 Troubleshooting Flow ...................................................................... 212
5. CONNECTION DIAGRAM ......................................................................................... 213
5.1 Interconnection Diagram .............................................................................. 213
5.2 PCB Layout .................................................................................................. 214
6. PARTS LIST .............................................................................................................. 215

APPENDIX D MULTI FEEDER MAINTENANCE ................................................ 218
1. OUTLINE ................................................................................................................... 218
1.1 Functions ...................................................................................................... 218
1.2 External View and Component Names ......................................................... 218
2. MECHANISM DESCRIPTION ................................................................................... 219
2.1 General Mechanism ..................................................................................... 219
2.2 Hopper Mechanism ...................................................................................... 219
3. PARTS REPLACEMENT ........................................................................................... 220
3.1 Precautions Concerning Parts Replacement ................................................ 220
3.2 Parts Layout ................................................................................................. 222

40930701TH Rev. 1 5/
3.3 Parts Replacement Methods ........................................................................ 223
3.3.1 Separator ........................................................................................ 224
3.3.2 AOLE-PCB ...................................................................................... 225
3.3.3 Square-shaped connector ............................................................... 226
3.3.4 Hopping Motor ................................................................................. 227
3.3.5 Planet gear ...................................................................................... 228
3.3.6 Roller B ........................................................................................... 229
3.3.7 Roller A ........................................................................................... 230
3.3.8 Mini pitch belt & Feed roller ............................................................. 231
4. TROUBLESHOOTING ............................................................................................... 232
4.1 Precautions Prior to the Troubleshooting ..................................................... 232
4.2 Preparations for the Troubleshooting ........................................................... 232
4.3 Troubleshooting Method ............................................................................... 232
4.3.1 LCD Status Message List ................................................................ 233
4.3.2 Troubleshooting Flow ...................................................................... 234
5. CONNECTION DIAGRAM ......................................................................................... 235
5.1 Interconnection Diagram .............................................................................. 235
5.2 PCB Layout .................................................................................................. 235
6. PARTS LIST .............................................................................................................. 236

40930701TH Rev. 1 6/
1. CONFIGURATION

1.1 System Configuration

OKIPAGE24DX / OKIPAGE24dx consists of control and engine blocks as the standard configu-
ration (See Figure 1-1.)
In addition, the following options are also available.

AC IN
Printer 120V
230V
Operator Face down Face up
panel stacker stacker

PC etc. Power Printer
Main control Mechanism
supply
unit
*
I/D unit
Centronics *
Parallel interface DC Fan Toner Cartridge
(Bidirection)

Front Feeder
RS-232C LED head
Serial I/F Motor-Main
Hopping motor

LAN etc. OKI HSP Paper tray
interface board
(Option) Paper size
detection switch

Extension D-RAM
SIMM
(Option)
High Capacity
Second Paper Multi Feeder
Feeder (Option)
(Option)

4MB/ 8MB High Capacity
Flash ROM SIMM Third Paper Duplex Unit
(Option) Feeder
(Option)
*: Consumables
: Paper feeding
: Singal flow : produced by third vender

Figure 1-1

40930701TH Rev. 1 7/
1.2 Printer Configuration

The printer unit consists of the following hardware components: