Lexmark 1275n Service Manual - Page 4

Repair Information .. .3-1

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Sensor Service Check 2-47 Diagnostic Aids 2-48 Basic Printer Paper Passage Test 2-48 Operator Menu Disabled 2-48 Diagnostic Mode 2-48 Diagnostic Menu Group 2-48 Setting Printer Registration 2-50 Print Tests 2-50 Quality Pages 2-51 Clean Engine Test 2-51 LCD Hardware Test 2-51 Button Test 2-51 DRAM Memory Test 2-51 ROM Memory Test 2-52 Parallel Wrap Test 2-53 Serial Wrap Tests 2-54 Input Tray Sensor Test 2-55 Size Sensing Sensor Test 2-55 Base Sensor Test 2-56 Quick Disk Check 2-57 DISK Test/Clean 2-57 Flash Test 2-58 Setting the Page Count 2-58 Viewing the Permanent Page Count 2-58 Viewing the Error Log 2-58 Clearing the Error Log 2-59 Exiting Diagnostic Mode 2-59 Print Quality Test Page 2-60 Print Quality Test Page 2-61 Repair Information 3-1 Precautions for Disassembly and Cleaning 3-1 Instructions for Handling the PWBs with MOS ICs. . . . . . 3-1 Precautions for Handling the Drum Cartridge 3-2 Parts not to be touched 3-2 Precautions for Handling the Laser Equipment 3-3 Adjustment Procedures 3-3 Registration Adjustment 3-3 Rack Lever Solenoid Adjustment 3-5 Removal Procedures 3-5 Outer Cover Removals 3-5 Image Transfer Roller Removal 3-6 Drum Cartridge Removal 3-6 iv

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iv
Sensor Service Check . . . . . . . . . . . . . . . . . . . . . . . . . .
2-47
Diagnostic Aids. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-48
Basic Printer Paper Passage Test . . . . . . . . . . . . . . . . .
2-48
Operator Menu Disabled . . . . . . . . . . . . . . . . . . . . . . . .
2-48
Diagnostic Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-48
Diagnostic Menu Group . . . . . . . . . . . . . . . . . . . . . . . . .
2-48
Setting Printer Registration . . . . . . . . . . . . . . . . . . . . . .
2-50
Print Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-50
Quality Pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-51
Clean Engine Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-51
LCD Hardware Test . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-51
Button Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-51
DRAM Memory Test. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-51
ROM Memory Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-52
Parallel Wrap Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-53
Serial Wrap Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-54
Input Tray Sensor Test. . . . . . . . . . . . . . . . . . . . . . . . . .
2-55
Size Sensing Sensor Test . . . . . . . . . . . . . . . . . . . . . . .
2-55
Base Sensor Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-56
Quick Disk Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-57
DISK Test/Clean. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-57
Flash Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-58
Setting the Page Count . . . . . . . . . . . . . . . . . . . . . . . . .
2-58
Viewing the Permanent Page Count . . . . . . . . . . . . . . .
2-58
Viewing the Error Log. . . . . . . . . . . . . . . . . . . . . . . . . . .
2-58
Clearing the Error Log . . . . . . . . . . . . . . . . . . . . . . . . . .
2-59
Exiting Diagnostic Mode. . . . . . . . . . . . . . . . . . . . . . . . .
2-59
Print Quality Test Page . . . . . . . . . . . . . . . . . . . . . . . . .
2-60
Print Quality Test Page . . . . . . . . . . . . . . . . . . . . . . . . .
2-61
Repair Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Precautions for Disassembly and Cleaning . . . . . . . . . . .
3-1
Instructions for Handling the PWBs with MOS ICs. . . . . .
3-1
Precautions for Handling the Drum Cartridge . . . . . . . . .
3-2
Parts not to be touched . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2
Precautions for Handling the Laser Equipment . . . . . . . .
3-3
Adjustment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3
Registration Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3
Rack Lever Solenoid Adjustment . . . . . . . . . . . . . . . . . . .
3-5
Removal Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-5
Outer Cover Removals. . . . . . . . . . . . . . . . . . . . . . . . . . .
3-5
Image Transfer Roller Removal . . . . . . . . . . . . . . . . . . . .
3-6
Drum Cartridge Removal . . . . . . . . . . . . . . . . . . . . . . . . .
3-6