Table Of Contents - Oki Microline 520 Service Handbook

Table Of Contents

Physical Specifications3
Power Requirements4
Environmental Conditions5
Operational Specifications6
Paper Specifications10
Memory Specifications12
Options - Cut Sheet Feeders14
Pull Tractor Kit15
Bottom Push Tractor Kit16
Serial Interface17
Roll Paper Stand18
Chapter 2 2.1 Electrical Operation20
Main Control Board21
Block Diagram22
Program Rom23
Electrically Erasable Programmable Read Only Memory26
Parallel Interface Control28
Print Control29
Lsi/Printhead Interface30
Gap Adjust Control31
Print Compensation Control32
Space And Line Feed (Sp/Lf) Motor Control33
Line Feed Motor Control34
Space Motor Control35
Encoder Disk36
Operation Panel37
Alarm Circuit38
Low Motor Drive Voltage Alarm39
Head Drive Time40
Print Speed41
Head Overheat Alarm Processing42
Power Supply Circuit43
Mechanical Operation - Printhead Mechanism44
Printhead Gap Information45
Printhead Operation47
Printhead Temperature49
Spacing Mechanism50
Spacing Operation51
Head Gap Mechanism52
Ribbon Drive Operation54
Line Feed Mechanism55
Cut Sheet/Continuous Sheet Switching Mechanism56
Cut Sheet Paper Feed Operation57
Continuous Paper Feed (Rear Tractor Mechanism)58
Continuous Paper Feed (Pull Tractor Mechanism)59
Continuous Paper Feed (Push/Pull Tractor Mechanism)61
Paper Detection Mechanism62
Support Protector Mechanism63
Automatic Paper Load64
Continuous Feed Paper65
Paper Park66
Chapter 3 %3.1.01 General Information67
Maintenance Tools68
Maintenance Precautions69
Disassembly/Assembly Procedures70
Preliminary Items71
Printhead Assembly72
Ribbon Protector73
Gear Case Assembly74
Pull-Up Roller Assembly75
Upper Cover, Access Cover, And Sheet Guide Assemblies76
Power Supply Assembly79
Operator Panel Pcb (Leop)80
Space Motor And Roller Guide Assemblies82
Carriage Cable84
Space Rack85
Roller/Holder Backup Assembly86
Guide Rail And Adjust Cam87
Left Ground Plate88
Right Ground Plate89
Rear And Cut Sheet Paper Feed Sensor Levers90
Platen Assembly91
Paper Chute Assembly92
Line Feed Motor Assembly93
Reset Spring94
Idle Gear And Change Lever95
Pressure Spring96
Carriage Shaft97
Leaf Spring98
Bottom Paper Sensor Levers99
Front Pressure Roller Assembly100
Tractor Assembly101
Main Frame103
Printer Adjustments104
Printhead Gap Adjustment105
Key Combinations107
Menu Operation108
Menu Settings110
Top Of Form113
Tear Feature115
Forms Tear Off116
Troubleshooting Tips122
Problem Categories123
Start Here Flowchart124
Tips For Preventing Image Problems125
Common Problems126
Abnormal Output - Output Samples128
Left Margin Drifting Problem130
Fault Alarms131
Alarm/Led Display Troubleshooting Table Index132
Alarm/Led Display Troubleshooting Tables134
Repair Analysis Procedures (Raps)136
Rap Index137
Rap 01 No Power Supplied To Printer138
Rap 02 No Spacing Operation139
Rap 03 Printhead Homing Error140
Rap 04 Paper Jam During Paper Loading141
Rap 05 Printhead Pins Not Firing142
Rap 06 Poor Print Quality143
Rap 07 Ribbon Feed Problem144
Rap 08 Line Feed Problem145
Rap 09 Operation Panel Malfunction146
Rap 10 Parallel Interface Problem147
Rap 11 Serial Interface Problem148
Printer Tests149
Rolling Ascii Test150
Font Test151
Serial Interface Loopback Test152
Serial Cable Information153
Serial Interface Signal Requirements154
Commonly Used Serial Cable Configurations155
Hexadecimal Dump Mode156
Resistance Checks157
Layout Diagram158
Line Feed Motor Resistance160
Space Motor Resistance161
Index To Charts163
Board Layout164
Operator Panel Board (Leop)166
Space Motor Board168
Current Part Numbers172
Definition Of Terms173
Parts Ordering Information174
Upper Cover Assembly178
Printer General Assembly179
Printer Unit181
Carriage Assembly187
Option Parts191