Apple LaserWriter300 Specifications download pdf (Page 40)

Troubleshooting Circuit Board Diagrams - 10

Circuit Board Diagrams

On the following pages are diagrams of the circuit boards and

high-voltage contacts listed below:

• Personal LaserWriter 300 I/O Board

• Personal LaserWriter 320I/O Board

• Personal LaserWriter 320 2 MB RAM Expansion Card

• Personal LaserWriter 320 6 MB RAM Expansion Card

• Personal LaserWriter 300/320 Controller Assembly

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 171 172

PLW 300 & LW 4/600 PS 1
Paper Paths 3
Basics Paper Paths - 2 4
Sensing System Theory 5
Sensor Functions 6
Image Formation System 8
The Printing Process 9
Status LEDs 11
Basics Status LEDs - 10 12
Toner Cartridge 13
LaserWriter Safety 15
Speciﬁcations 17
Requirements 19
Intro Date 20
Logic Board 21
Performance 23
Specifications Paper - 8 25
Electrical 27
Physical 28
Environmental 29
Troubleshooting 30
320 Power-On Self Test 32
Engine Diagnostic 34
LED Error Configurations 36
Troubleshooting Tips 37
Interrupting a Print Cycle 38
Avoiding Paper Jams 39
Circuit Board Diagrams 40
Wiring Diagram 46
Service Test Page 48
LaserWriter 4/600 PS 49
Personal LaserWriter 300/320 50
Power Failure 53
No Paper Pickup 54
Printer Jams 55
Motor Failure 56
Fan Failure 57
Fuser Assembly Failure 58
Printer Drops After 3 Pages 59
Environmental Problems 60
PLW 300 Flowchart 1 61
Important 65
Table 1. No Power to Fan 65
Print Quality Problems 71
Table 7. All-Blank Page 72
Table 8. All-Black Page 72
Black Lines Over Image 76
Table 17. Bad Registration 77
Table 18. Skewed Print 78
Table 19. Bad Fusing 78
Edge-to-Edge 80
Take Apart 81
Connector Covers 82
Rear Door 84
Top Door 88
Light Pipe 90
Button Lock 94
Fuser Assembly 96
Fixing Film 98
Connectors 100
Connector 101
Delivery Roller 103
Assembly 103
Passive Delivery 105
Laser/Scanner 107
Fan Cable 108
Take Apart Fan - 29 110
Before you begin, remove 110
Mirror Assembly 112
Intake Guide 114
Lock Guide 116
Transfer Roller 118
Transfer Mount 121
Assemblies 121
I/O Board 123
Motor Assembly 125
Controller 127
Controller Assembly 130
HVT Connector 131
Pickup Solenoid 133
Solenoid Cable 134
Drive Assembly 135
Pickup Motor 137
Plastic Lock 138
Roller Assembly 141
Feeder Guide 143
Arm Registration 145
1 Remove the HVT shield 146
Cover Interlock 147
Actuator 147
Scanner 149
Interconnect 149
1 Release the two tabs that 150
Upgrades 153
LW 4/600 154
Memory Upgrade 154
Additional Procedures 155
Maintenance 156
Adjustments 160
Registration 167
Adjustment 167
Leading Edge 169
Distance 169
Test Page Pattern 169
Three Test Pages 169
Exploded View 171
Exploded View 1 172
PLW 320 & LW 4/600 PS 172

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Apple LaserWriter300 Specifications Page 40

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