Oki OKIPAGE 24DX User manual

Service Guide OKIPAGE 24DX/24DXn
Chapter 0 Introduction
Front Cover
Oki Data
Service Guide
OKIPAGE 24DX & 24DXn
Adobe Acrobat printable reference copy
of the OKIDATA Service Training Manual.
01/26/2000
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 OKIPAGE 24DX/24DXn
0 Introduction
Preface 1
1 Configuration
Configuration 2
....1.1 System Configuration 3
....1.2 Printer Configuration 4
....1.3 Optional Configuration
....1.4 Specification 5
....1.5 Safety Standards 6
........1.5.1 Certification Label 7
........1.5.2 Warning Label 8
2 Operation Description
2.0 Operation Description 9
2.1 Main Control Board (BOARD-FFF) 10
2.2 Power Supply Unit 11
2.3 Electro-photographic Process 12
....2.3.1 Electro-photographic process mechanism
....2.3.2 Electro-Photographic process 13
....2.3.3 Process operation descriptions 15
....2.3.4 Revision of LED Head Illumination
2.4 Paper Jam Detection 16
2.5 Cover Open 18
2.6 Toner Low Detection 17
2.7 Stacker-full Detection 19
2.8 Page Size Detection 14
3 Parts Replacement
Parts Replacements 20
....3.1 Precautions for Parts Replacement 21
....3.2 Parts Layout 22
........Figure 3-1 23
........Figure 3-2 24
........Figure 3-3 25
........Figure 3-4
....3.3 How to Change Parts 26
........3.3.1 Face-up Stacker Assy 27
........3.3.2 Contact Assy 28
........3.3.3 DC Fan Motor 29
........3.3.4 OP Panel Assy 30
........3.3.5 Board - FFF 31
........3.3.6 Stacker Assy, Damper Arm, Cover Rear 32
........3.3.7 Sensor Stacker Full 33
........3.3.8 Cable cover (guide film) 34
........3.3.9 Damper 35
........3.3.10 Feeder Unit - Front 36
........3.3.11 Roller Assy - Regist 37
........3.3.12 Motor - Main 38
........3.3.13 Guide Assy - Eject 39
........3.3.14 Heat Assy 40
........3.3.15 Roller feed (C) 41
........3.3.16 Roller Assy - BK 42

Table of Contents Page
........3.3.17 Roller Assy - Feed 43
........3.3.18 LED Head
........3.3.19 Paper cassette, ROLLER Assy - Feed, ROLLER
Assy - Hopping
........3.3.20 Frame Assy - Separation
........3.3.21 Transfer Roller / TR Gear / TR Bearing
........3.3.22 EP lock shaft
........3.3.23 LEVER Assy - Out Sensor
........3.3.24 Toner sensor lever
........3.3.25 Paper sensor lever
........3.3.26 Inlet sensor lever
........3.3.27 Power supply unit
........3.3.28 Lever-Paper end & Lever-Paper near end
........3.3.29 Guide Assy - Cassette (L)
........3.3.30 Guide Assy - Cassette (R)
........3.3.31 Removing/Installing Duplex Unit
........3.3.32 Board-LEX
........3.3.33 Connector (IMSA-9714N-14A)
........3.3.34 Photo Sensor
........3.3.35 SOLENOID Assy
........3.3.36 Motor
4 Adjustment
4.0 Adjustment 44
....4.1 Maintenance Modes and Functions 45
........4.1.1 User maintenance mode 46
........4.1.2 System maintenance mode 47
........4.1.3 Engine maintenance mode 47
........4.1.4 EEPROM initialization 47
....4.2 Adjustment When Replacing a Part 48
........4.2.1 Setting LED Head Drive Time 49
........4.2.2 Destination setting 50
........4.2.3 Setting of LED head drive time 50
5 Periodic Maintenance
5.1 Periodic Maintenance 51
5.2 Cleaning 52
....5.2.1 Cleaning the LED Lens Array 53
....5.2.2 Cleaning the Plastic Film 53
6 Troubleshooting Procedures
6.1 Troubleshooting Tips 54
6.2 Check Points Before Correcting Image Problems 55
6.3 Notes When Correcting Image Problems 56
6.4 Preparation Before Troubleshooting 57
6.5 Troubleshooting Flowchart 58
....6.5.1 Status Monitor Message List 59
....6.5.2 LCD message troubleshooting 61
........(1) The printer does not work normally after being turned
on. 62
........(2) Paper jams 63
............(2)-1 Paper input jam (1st tray) 63
............(2)-2 Paper input jam (front feeder) 63

Table of Contents Page
............(2)-3 Paper feed jam 63
............(2)-4 Paper exit jam 63
............(2)-5 Duplex INPUT JAM 63
............(2)-6 Duplex FEED JAM1 63
............(2)-7 Duplex FEED JAM2 63
............(2)-8 Duplex FEED JAM3 63
........(3) Paper size error 64
........(4) Fuser unit error (ERROR 71), (ERROR 72), (ERROR
73) 65
........(5) I/F time-out between printer and optional tray (ERROR
81) 66
........(6) I/F time-out between printer and Duplex Unit (ERROR
83) 67
........(7) I/F time-out occurs between the printer and the
operator panel (ERROR 80) 68
........(8) Message cannot be received through the parallel
interface 69
........(9) Message cannot be received through the serial
interface 69
........(10) Data cannot be received through the OKI HSP
interface 69
........(11) Synchronous serial I/O error (ERROR 74) 69
....6.5.3 Image Troubleshooting 61
........(1) An image is light or blurred entirely 62
........(2) Dark background density 63
........(3) Black paper is output 64
........(4) Black belts or stripes in the vertical direction 65
........(5) Cyclic error 66
........(6) Print voids 67
........(7) Poor fusing 68
........(8) White belts or streaks in the vertical direction 69
........(9) Snowy print of high density pattern 69
........(10) Blotchy faded print 69
........Contents - Figure 6-5 70
........Contents - Figure 6-6 71
7 Wiring Diagram
7.1 Interconnect Signal Diagram 72
7.2 PCB Layout 73
....7.2.1 Main Control Board (HBY PCB) 74
....7.2.2 Power Supply Board (120V/230V) 75
....7.2.3 Power supply board (High voltage)
....7.2.4 LEX-PCB
....7.2.5 Flash ROM module (BOARD-FSL or BOARD-FSL-2)
7.3 Resistance Check
7.4 Program Font/ROM Location
8 Parts List
Figure 8-1 Printer Unit 76
Figure 8-2 Frame - Main Unit 77
Figure 8-3 Base Unit 77
Figure 8-4 Duplex Unit 77
A Centronics Parallel Interface

Table of Contents Page
Parallel Interface 81
B RS-232C Serial Interface
RS-232C Serial Interface 81
C Duplex Unit Maintenance
1. OUTLINE 94
....1.1 Functions 95
....1.2 External View and Component Names 96
2.0 Mechanism Description 97
....2.1 General Mechanism 98
....2.2 JAM Release Mechanism 99
....2.3 Removing/Installing Duplex Unit 100
3.0 Parts Replacement 101
....3.1 Precautions Concerning Parts Replacement 102
....3.2 Parts Layout 103
....3.3 Parts Replacement Methods 104
........3.3.1 Board-LEX 105
........3.3.2 Connector (IMSA-9714N-14A) 106
........3.3.3 Photo Sensor 107
........3.3.4 SOLENOID Assy 108
........3.3.5 Motor 109
4.0 Troubleshooting 110
....4.1 Precautions Prior to the Troubleshooting 111
....4.2 Preparations for the Troubleshooting 112
....4.3 Troubleshooting Method 113
........4.3.1 LCD Status Message List 114
........4.3.2 Troubleshooting Flow 115
5.0 Connection Diagram 116
....5.1 Interconnection Diagram 117
....5.2 PCB Layout 118
6.0 Parts List 119
Table 6-1 Duplex Unit 120
D Second / Third Paper Feeder Maint (option)
1.0 Outline 121
....1.1 Functions 122
....1.2 Appearance and Parts Name 123
2.0 Description of operation 124
....2.1 Driving Mechanism 125
....2.2 Hopper Mechanism 126
3.0 Parts Replacement 127
....3.1 Precautions Concerning Parts Replacement 128
....3.2 Parts Layout 129
....3.3 Parts Replacement Methods 130
........3.3.1 Roller assy hopping, Roller assy feed 131
........3.3.2 Cover front assy 132
........3.3.3 Board-BBB 133
........3.3.4 Lever paper end, Lever paper near end 134
........3.3.5 Motor 135
........3.3.6 Connector (IMSA-9714N-14B), Connector
(IMSA-9714N-14A) 136
........3.3.7 Frange pulley, pulley Idle, Mini pitch belt, Plate Earth
shaft, Gear double, Tray switch assy 137

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........3.3.8 Roller feed 138
........3.3.9 Bracket sub roller 139
........3.3.10 Frame side (L) assy 140
........3.3.11 Frame side (R) assy 141
4.0 Troubleshooting 142
....4.1 Precautions Prior to the Troubleshooting 143
....4.2 Preparations for the Troubleshooting 144
....4.3 Troubleshooting Method 145
........4.3.1 LCD Status Message List 146
........4.3.2 Troubleshooting Flow 147
5.0 Connection Diagram 148
....5.1 Interconnection Diagram 149
....5.2 PCB Layout 150
6.0 Parts List 151
E Multi Feeder Maint. (option)
1.0 Outline 152
....1.1 Functions 153
....1.2 External View and Component Names 154
2.0 Mechanism Description 155
....2.1 General Mechanism 156
....2.2 Hopper Mechanism 157
3.0 Parts Replacement 158
....3.1 Precautions Concerning Parts Replacement 159
....3.2 Parts Layout 160
....3.3 Parts Replacement Methods 161
........3.3.1 Separator 162
........3.3.2 AOLE-PCB 163
........3.3.3 Square-shaped connector 164
........3.3.4 Hopping Motor 165
........3.3.5 Planet gear 166
........3.3.6 Roller B 167
........3.3.7 Roller A 168
........3.3.8 Mini pitch belt & Feed roller 169
4.0 Troubleshooting 170
....4.1 Precautions Prior to the Troubleshooting 171
....4.2 Preparations for the Troubleshooting 172
....4.3 Troubleshooting Method 173
........4.3.1 LCD Status Message List 174
........4.3.2 Troubleshooting Flow 175
5.0 Connection Diagram 176
....5.1 Interconnection Diagram 177
....5.2 PCB Layout 177
6.0 Parts List 179

Page: 1
Service Guide OKIPAGE 24DX/24DXn
Chapter 0 Introduction
Preface
This maintenance manual describes the field maintenance methods for OKIPAGE 24DX & 24DXn.
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.
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 OKIPAGE 24DX/24DXn
Chapter 1 Configuration
Configuration
System Configuration
Printer Configuration
Optional 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 OKIPAGE 24DX/24DXn
Chapter 1 Configuration
1.1 System Configuration
The OKIPAGE 24DX & 24DXn consists of control and engine blocks as the standard configuration (See
Figure 1-1).
In addition, the following options are also available.

Figure 1-1