OKIDATA Okipage 16n User manual

Page: 1
Service Guide OKIPAGE16n
Chapter 0 About This Manual
OKIPAGE 16n
LED Page Printer
Adobe Acrobat printable reference
copy of the OKIDATA Service Training Manual.
09/17/97
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 view on most
displays well.
Copyright 1997, 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)

Table of Contents Page
Service Guide OKIPAGE16n
0 About This Manual
Front Cover 1
1 Configuration
1.1 System Configuration 2
1.2 Printer Configuration 3
1.3 Optional Configuration 4
1.4 Specification 5
1.5 Safety Standards 6
....1.5.2 Warning Label 7
2 Operation Description
2. OPERATION DESCRIPTION 8
2.1 Main Control Board (BOARD-COM) 9
2.2 Power Supply Board 10
2.3 Relay/Driver Board (AOLC board) 11
2.4 Electrophotographic Process 12
....2.4.1 Electrophotographic process mechanism 13
....2.4.2 Electrophotographic process 14
....2.4.3 Process operation descriptions 15
2.5 Paper Jam Detection 16
2.6 Cover Open 17
2.7 Toner Low Detection 18
2.8 Stacker-full Detection 19
2.9 Page Size Detection 20
2.10 PostScript Board (BOARD-PSBA) Optional 21
3 Parts Replacement
3. PARTS REPLACEMENT 22
3.1 Precautions for Parts Replacement 23
3.2 Parts Layout 24
3.3 How to Change Parts 25
....3.3.1 Rear cover, side cover (L) Assembly, face-up stacker
Assembly, and I/F cover Assembly. 26
....3.3.2 Contact Assembly 27
....3.3.3 DC fan motor 28
....3.3.4 Manual feed hopper Assembly 29
....3.3.5 Side cover (R) (operator panel Assembly) 30
....3.3.6 Earth plate BK (R) (BOARD-PSBA, BOARD-COM) 31
....3.3.7 Stacker cover Assembly, damper arm, and washer 32
....3.3.8 Damper 33
....3.3.9 Stacker full sensor Assembly 34
....3.3.10 Cable cover (cable guides A and B) 35
....3.3.11 Eject roller Assembly 36
....3.3.12 Paper supply guide D 37

Table of Contents Page
....3.3.13 Separator F 38
....3.3.14 Front feeder roller Assy 39
....3.3.15 Hopping motor 40
....3.3.16 Front feeder paper end sensor 41
....3.3.17 Main chassis unit 42
....3.3.18 Registration roller 43
....3.3.19 Drum motor 44
....3.3.20 Idle gear 45
....3.3.21 Fusing Assembly 46
....3.3.22 Fuser pressure roller 47
....3.3.23 EP lock shaft 48
....3.3.24 Hopping roller Assembly 49
....3.3.25 Outlet sensor lever 50
....3.3.26 Toner sensor lever 51
....3.2.27 Paper sensor lever 52
....3.3.28 Inlet sensor lever 53
....3.3.29 Power Supply Board / Insulator 54
....3.3.30 Paper end lever 55
....3.3.31 Guide rail (L) Assembly 56
....3.3.32 Guide rail (R) Assembly 57
....3.3.33 Cover Frame 58
....3.3.34 LED head 59
....3.3.35 Separator Assembly 60
....3.3.36 Transfer roller 61
4 Adjustment
4. ADJUSTMENT 62
4.1 Maintenance Modes And Functions 63
....4.1.1 User maintenance mode 64
....4.1.1 User maintenance mode menu system 65
....4.1.2 System maintenance mode 66
....4.1.3 Engine maintenance mode 67
....4.1.4 EEPROM initialization 68
4.2 Adjustment When Replacing A Part 69
....4.2.1 Setting of LED head drive time 70
....4.2.2 Resetting the fuser counter 71
....4.2.3 Destination setting 72
5 Periodical Maintenance
5.1 Periodic Part Replacement 73
5.2 Cleaning 74
....5.2.1 Cleaning of LED lens array 75
6 Troubleshooting Procedures
6.1 Troubleshooting Tips 76
6.2 Points to Check before Correcting Image Problems 77
6.3 Tips for Correcting Image Problems 78

Table of Contents Page
6.4 Preparation for Troubleshooting 79
....Operator Panel Display 80
6.5 Troubleshooting Flow 81
....6.5.1 LCD Status Message/Trouble List 82
....6.5.2 LCD message troubleshooting 83
........1 The printer does not work normally after being turned
on. 84
........2 [JAM error] 85
............2-1 Paper input jam (1st tray) 86
............2 - 2 Paper input jam (front feeder) 87
............2 - 3 Paper feed jam 88
............2-4 Paper exit jam 89
........3 Paper size error 90
........4 Fuser unit error (ERROR 71), (ERROR 72), (ERROR
73) 91
........5 I/F time-out between printer and optional tray (ERROR
81) 92
........6 I/F time-out occurs between the printer and the operator
panel (ERROR 80) . 93
........7 Communication with the host cannot be performed via
the parallel interface 94
........8 Data cannot be received through the OKI HSP interface 95
........9 Synchronous serial I/O error (ERROR 74) 96
....6.5.3 Image troubleshooting 97
........1 Image are light or blurred 98
........2 Dark background density 99
........3 Black paper is output 100
........4 Black belts or stripes in the vertical direction 101
........5 Cyclic error 102
........6 Print voids 103
........7 Poor fusing 104
........8 White belts or streaks in the vertical direction 105
........9 Snowy print of high density pattern 106
........10 Blotchy faded print 107
7 Wiring Diagram
7.1 Interconnect Signal Diagram 108
7.2 PCB Layout 109
7.3 Resistance Check 110
Program/Font ROM Location 111
8 Parts List
8. PARTS LIST 112
Printer Unit (Figure 8-1) 113
Main Chassis Unit (Figure 8-2) 1 of 2 114
Main Chassis Unit (Figure 8-2) 2 of 2 115

Table of Contents Page
Front Feeder Unit (Figure 8-3) 116
Base Unit (Figure 8-4) 117
A Centronics Parallel Interface
Appendix A: Centronics Parallel Interface 118
B High Capacity Second Paper Feeder
Preface 119
1. Outline 120
....1.1 Functions 121
....1.2 External View and Component Names 122
2. Mechanism Description 123
....2.1 General Mechanism 124
....2.2 Hopper Mechanism 125
3. Parts Replacement 126
....3.1 Precautions Concerning Parts Replacement 127
....3.2 Parts Layout 128
....3.3 Parts Replacement Methods 129
........3.3.1 Idle rollers 130
........3.3.2 AOLT-PCB 131
........3.3.3 Hopping motor 132
........3.3.4 Feed roller 133
........3.3.5 Hopping roller rubber 134
........3.3.6 Side frame (L) assy 135
........3.3.7 Side frame (R) assy 136
....4. TROUBLESHOOTING 137
........4.1 Precautions Prior to the Troubleshooting 138
........4.2 Preparations for the Troubleshooting 139
........4.3 Troubleshooting Method 140
............4.3.1 LCD Status Message List 141
............4.3.2 Troubleshooting Flow 142
....5. Connect Diagram 143
........5.1 Interconnection Diagram 144
........5.2 PCB Layout 145
....6. Parts List 146
C Multi Feeder Maintenance
Preface 147
1. Outline 148
....1.1 Functions 149
....1.2 External View and Component Names 150
2. Mechanism Description 151
....2.1 General Mechanism 152
....2.2 Hopper Mechanism 153
3. Parts Replacement 154
....3.1 Precautions Concerning Parts Replacement 155
....3.2 Parts Layout 156

Table of Contents Page
....3.3 Parts Replacement Methods 157
........3.3.1 Separator 158
........3.3.2 AOLE-PCB 159
........3.3.3 Square-shaped connector 160
........3.3.4 Hopping Motor 161
........3.3.5 Planet gear 162
........3.3.6 Roller B 163
........3.3.7 Roller A 164
........3.3.8 Mini pitch belt & Feed roller 165
4. Troubleshooting 166
....4.1 Precautions Prior to Troubleshooting 167
....4.2 Preparations for Troubleshooting 168
....4.3 Troubleshooting Method 169
........4.3.1 LCD Status Message List 170
........4.3.2 Troubleshooting Flow 171
5. Connection Diagram 172
....5.1 Interconnection Diagram 173
5.2 PCB Layout 174
6. Parts List 175
D Localtalk Serial Interface (OKIPAGE16n/PS Only)
Localtalk Serial Interface (OKIPAGE 16n/PS Only) 176

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Service Guide OKIPAGE16n
Chapter 1 Configuration
1.1 System Configuration
OKIPAGE16n / OKIPAGE16n/PS 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

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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)

Page: 3
Service Guide OKIPAGE16n
Chapter 1 Configuration
1.2 Printer Configuration
The printer unit consists of the following hardware components:
Electrophotographic processor

Paper feeder

Controller

Operator panel

Power Supply board

Figure 1-2 shows the printer unit configuration.

Figure 1-2
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)

Page: 4
Service Guide OKIPAGE16n
Chapter 1 Configuration
1.3 Optional Configuration
The options below are available for use with OKIPAGE16n / OKIPAGE16n/PS. They are sold
separately from the printer unit.
(1) Multi-Purpose Feeder
(2) High Capacity Second Paper Feeder
(3) RAM module (72 pin SIMM, 1 MB/2 MB/4 MB/8 MB/16 MB/32 MB)
16 MB RAM module


8 MB RAM module 
Copyright 1997, 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 OKIPAGE16n
Chapter 1 Configuration
1.4 Specification
(1) Type Desk top
(2) External dimensions Height 10.6" (270 mm)
(excludes protruding Width 14.4" (366 mm)
Portion) Depth 16.9" (430 mm)
(3) Weight 15.2 kg (33.5 lbs)
(4) Development method Dry electrophotography
Exposure method LED stationary head
(5) Paper used <Type>
Standard paper

- Xerox 4200 (20 lbs)
Application paper (manual face-up feed)

- Label
- Envelope
- OHP paper (Transparency)
<Size>
Standard sizes

- Letter
- Legal
- Executive
- Envelope
- A4
- A5
- B5
- A6
Applicable sizes

- Width: 3.4" to 8.5" (86 to 216 mm)
- Length: 5.5" to 14" (140 to 355.6 mm)
<Thickness>
- Automatic feed: 16 to 28 lbs (60 to 105 g/m 2 )
- Manual feed: Label, OHP paper (transparency)
Envelope

(6) Printing speed First print: 10 sec.
Continuous print: 16 sheets/min.
Warm-up time: 90 sec. [at room temperature 77°F
(25°C) and rated voltage (120 VAC)]
(7) Paper feed method Automatic feed or manual feed
(8) Paper delivery method Face down/face up
(9) Resolution 600 x 600 dots/inch
(10) Power input 120 VAC + 5.5%, -15%
230/240 VAC + 10%, -14%
(11) Power consumption Peak: Approx. 600W
Typical Operation: Approx. 220W
Idle: Approx. 100W
Power save mode: Approx. 20W
(12) Temperature and humidity
In operation Power off mode During Storage Unit
Temperature 50 - 90
(10 - 32) 32 - 110 (0 - 43) 14 - 110 (-10 - 43) Degree F Degree C
Humidity 20 - 80 10 - 90 10 - 90 %RH
Maximum wet bulb
temperature 77 (25) 80.4 (26.8) ______ Degree F Degree C
Minimum difference
of wet and dry bulb
temperature
35.6
(2) 35.6 (2) ______ Degree F Degree C
Temperature 50 - 90 32 - 110 14 - 110 °F
In operation Power off mode During Storage Unit
Maximum wet
bulb temperature
Minimum difference
of wet and dry
bulb temperatures
Humidity
35.6 35.6 °F
77 80.4 °F
(10 - 32) (0 - 43) (–10 - 43) (°C)
20 - 80 10 - 90 10 - 90 %RH
(25) (26.8) (°C)
(2) (2) (°C)
Notes:
1. Storage conditions specified above apply to printers in packed condition.
2. Temperature and humidity must be in the range where no condensation occurs.

(13) Noise During operation: 50 dB (A) or less
At standby: 45 dB (A) or less
Power save mode: 43 dB (A) or less
(14) Consumables Toner cartridge kit 5,000 (5% duty)
Image drum cartridge 30,000 (at continuous printing)
18,000 (3 page/job)
11,000 (1 page/job)
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)

Page: 6
Service Guide OKIPAGE16n
Chapter 1 Configuration
1.5 Safety Standards
1.5.1 Certification Label
The safety certification label is affixed to the printer in the position below.
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)

Page: 7
Service Guide OKIPAGE16n
Chapter 1 Configuration
1.5.2 Warning Label
The warning label is affixed to the portion which may cause bodily injury.
Follow the instructions on warning labels during maintenance.
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)

Page: 8
Service Guide OKIPAGE16n
Chapter 2 Operation Description
2. OPERATION DESCRIPTION
OKIPAGE16n / OKIPAGE16n/PS consists of a main control board, a power supply board, a driver
board, an operator panel and an electrophotographic process mechanism.
The control board receives data through a host I/F, decodes and edits the data, and stores the
edited data in memory. After completing edition of one page of data, it references the font memory
and generates bit data on the same memory. At the same time, it transfers the bit image data to
the LED head in units of one dot line.
The electrophotographic process mechanism prints data on paper.
The operator panel is used for operations and status display.
Fig. 2-1 shows an OKIPAGE16n / OKIPAGE16n/PS block diagram.

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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)

Page: 9
Service Guide OKIPAGE16n
Chapter 2 Operation Description
2.1 Main Control Board (BOARD-COM)
The control board consists of an one chip CPU, LSIs, program/font ROM's, DRAM's, an EEPROM,
a host interface circuit, and a mechanism driving circuit.
(1) One-chip CPU
The one-chip CPU is a custom CPU (32-bit internal bus, 32-bit external bus, 32-MHz clock)
that incorporates an RISC CPU and its peripheral devices, and has the following functions.
Built-in device Function
Chip select controller
Bus controller
DRAM controller
Control of ROM, DRAM and I/O device
DRAM controller Transfer of image data from DRAM to OST LSI
Parallel interface controller Control of Centronics parallel interface
Timer Generation of various control timing
Monitoring of paper running and paper size
Serial I/O port Control of operator panel, EEPROM, and options
I/O port Inputting/outputting of sensor, signal and motor signal
Option I/O interface Control of OKI HSP interface
(2) Program/font ROM's
The program/font ROM's store the HP IV emulation program and various types of font. MASK ROM is
used as the program/font ROM's.
(3) DRAM's
2-Megabyte DRAM (4 Mbit DRAM x 4) is mounted as resident memory to be used for storing
the program and providing various buffers. This DRAM is expandable up to 66 Mbytes by
adding expansion memory (SIMMs). This DRAM provides the areas shown in the following
table.
Memory area Use MENU Memory capacity setting
Expansion RAM
System area Working area used for the program Fixed Fixed
Raster buffer Stores converted bit image data Enable Expandable
Receive buffer Stores temporarily the data
received from the host interface Enable Expandable
Page buffer Adds print information to the
analyzed receive data and stores
the resulted data.
-Expandable
DLL/macro buffer Stores soft fonts and macro data. - Expandable