IBM 5150 - Page 222

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13. Lift control circuit card to clear the six posts. Carefully pull

control circuit card away

from

print mechanism assembly.

3-47

Main Page

Table of Contents8
Section O. How-To-Use10
Section 1. Introduction14
Problem Isolation16
Start16
Power16
System Board39
Memory44
Keyboard50
Display (Monochrome)54
Display (Color/Graphics)72
Diskette Drive122
Parallel Printer Adapter126
Asynchronous Communications Adapter130
Game Control Adapter136
Removal/Replacement176
1/4" DISKETTE DRIVE Cone Assembly Removal178
Cone Assembly Replacement179
Cone Lever Arm Removal180
Cone Lever Arm Replacement181
Diskette Drive"A" Removal182
Diskette Drive"A" Replacement184
Diskette Drive "B" Removal186
Diskette Drive "B" Replacement188
LED Assembly Replacement197
Servo Board Removal204
Servo Board Replacement204
Access Cover Removal207
- Base Cover Removal208
Base Cover Replacement209
Carriage Belt Adjustment210
Carriage Belt Removal212
Carriage Belt Replacement215
R ' \ Carriage Drive Assembly Removal217
Carriage Drive Assembly Replacement218
Control Circuit Card Removal220
Control Circuit Card Replacement223
Driver Circuit Card Removal226
Driver Circuit Card Replacement228
Control Panel Removal229
Control Panel Replacement229
Forms Feed Knob Removal230
Forms Rack Removal231
Forms Tractor Removal232
Forms Tractor Replacement233
Fuse Removal234
Fuse-Filter Card/Power Cord Removal235
Fuse-Filter Card/Power Cord Replacement236
Heat Sink/Power Transistor Assembly Removal237
Heat Sink/Power Transistor Assembly Replacement238
Intermediate Gear Removal239
Intermediate Gear Replacement240
Left Margin Sensor Adjustment241
Left Margin Sensor Removal247
Left Margin Sensor Replacement248
Power Transformer Removal249
Power Transformer Replacement250
Print Head Gap Adjustment251
Print Head Removal252
Print Head Replacement254
Print Mechanism Assembly Removal255
Print Mechanism Assembly Replacement256
Ribbon Shield Removal259
Ribbon Shield Replacement260
Safety Shield Removal262
Top Cover Removal263
- IBM MONOCHROME DISPLAY Display Removal267
Display Replacement267
- KEYBOARD Base Removal268
Base Replacement268
Keyboard Assembly Removal269
Keyboard Assembly Replacement269
- Option Adapter270
Option Adapter Removal270
Option Adapter Replacement272
- SYSTEM UNIT Cover Removal273
Cover Replacement273
Power Supply Removal274
Power Supply Replacement277
16 KB Memory Expansion Kit Removal278
16 KB Memory Expansion Kit Replacement280
Speaker Removal281
System Board Removal282
System Board Replacement284
Preventive Maintenance (Pm)330
Glossary334

IBM 5150 - Page 222

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