Name: Lexmark C734dn
Brand: Lexmark
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4-34 Service Manual

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Rear left cover removal

1. Remove the left cover. See “Left cover removal” on page 4-21.

2. Separate the left cover and rear left cover by sliding the left rear cover as shown to disengage the latch (A).

Default Chapter3
- Table of Contents3
Notices and Safety Information9
- Laser Notice9
- Aviso sobre O Laser10
- Lithium Warning15
- Safety Information15
Preface18
- Change History18
- Conventions18
- Navigation Buttons19
General Information21
- Models21
- Options21
  - Media Options22
  - Memory Options22
- Printer Specifications23
- Media Specifications28
- Tools Required for Service35
- Acronyms35
Diagnostic Information37
- Start37
- Operator Panel and Menus38
- Power-On Self Test (POST) Sequence40
- Symptom Tables41
  - Printer Symptom Table41
  - Print Quality Symptom Table41
- User Status and Attendance Messages42
- Error Codes and Messages52
- Service Checks73
XX, 920.01-POST (Power-On Self Test) Aligner Error Service Check86
XX-Cam Motor Error Service Check87
XX-COD (Color on Demand) Motor Service Check89
XX, 161.XX-Motor Error (Option Tray 2) Service Check90
XX, 163.XX-Motor Error (Option Tray 3) Service Check91
XX, 165.XX-Motor Error (Option Tray 4) Service Check92
XX, 167.XX-Motor Error (Option Tray 5) Service Check93
- Next93
XX-Motor (HCIT Elevator) Error Service Check94
250.03-Paper Jam Error Service Check95
201.31-Paper Jam Error Service Check96
- Go Back96
Paper Jam Error Service Check99
230.05-Paper Jam Error Service Check102
Paper Jam Service Check104
242.11-Paper Jam Service Check105
Paper Jam Service Check106
Paper Jam Service Check107
Paper Jam Service Check108
Paper Jam Service Check109
Paper Jam Service Check110
243.11-Paper Jam Service Check111
Paper Jam Service Check112
Paper Jam Service Check113
Paper Jam Service Check114
Paper Jam Service Check115
Paper Jam Service Check116
244.11-Paper Jam Service Check117
Paper Jam Service Check119
Paper Jam Service Check120
Paper Jam Service Check121
245.11-Paper Jam Service Check122
Paper Jam Service Check123
Paper Jam Service Check124
Paper Jam Service Check125
Paper Jam Service Check126
900.99 (Except 900.05)-System Software Error Service Check126
Transfer Module Error Service Check129
Engine Software Error, NVRAM MGR Problem Service Check130
920.25-Transfer Module Missing Error Service Check130
POST (Power-On Self Test) Error Service Check132
POST (Power-On Self Test) Printhead Motor Not Connected Error Service Check134
POST (Power-On Self Test) Error Service Check135
POST (Power-On Self Test)-Four Toner Sensors Not Connected Error Service Check137
POST-Three Toner Sensors Not Connected Error Service Check138
POST (Power-On Self Test)-Two Toner Sensors Not Connected Error Service Check138
POST (Power-On Self Test)-One Sensor Not Connected Error Service Check140
POST (Power-On Self Test) Cartridge Motor 1 Not Connected Error Service Check141
POST (Power-On Self Test)-Cartridge Motor 2 Not Connected Error Service Check142
2-107144
920.15, 920.20-POST (Power-On Self Test)-Bad Transfer Module NVRAM Data Error Service Check144
POST (Power-On Self Test)-Bad Printhead NVRAM Data Error Service Check144
POST (Power-On Self Test)-Output bin Cable Not Connected Error Service Check145
- POST (Power-On Self Test)-Cartridge Motor 3 Not Connected Error Service Check146
- POST (Power-On Self Test)-Transfer Module Stepper Motor Not Connected Error Service Check147
- POST (Power-On Self Test)-24 V Power Supply Failure Error Service Check149
- POST (Power-On Self Test)-Duplex Motor Not Connected Error Service Check150
- 920.28, 920.29-POST (Power on Self Test) Service Check152
- 925.03, 925.05-Fan Error Service Check152
- Next152
- Go Back156
Diagnostic Aids177
- Diagnostics Menu177
- Diagnostics Menu Structure178
- Available Tests178
- Registration181
- Alignment184
- Motor Tests185
- Print Tests186
- Input Source Tests186
- Hardware Tests188
- Duplex Tests190
- Print Test (Duplex)191
- Top Margin (Duplex)192
- Left Margin (Duplex)192
- Sensor Test193
- Printhead Tests194
- Device Tests194
- Printer Setup196
- Page Counts196
- Configuration ID196
- Motor Calibration197
- EP Setup198
- Reports198
- Event Log198
- Ep Defaults198
- Display Log198
- Exit Diagnostics199
- Clear Log199
500 D198
- Configuration Menu (CONFIG MENU)200
- Front Cover Locked in Place208
- Printhead Verification211
- Paper Jams214
  - Error Jam Locations214
  - Clearing Jams215
Repair Information223
- Safety Information223
- Removal and Cleaning Precautions223
- Handling ESD-Sensitive Parts224
- Handing the Photoconductor Unit224
- Screw and Retainer Identification Table225
- Adjustments230
  - Printhead Alignment230
- Printer Removal Procedures240
  - Precautions to Take before Maintenance Work240
- Cover Removals241
- Printer Removals267
- Option Removals413
Connector Locations429
- Locations429
Service Manual430
- Connectors430
- System Board Diagram430
Preventive Maintenance439
- Safety Inspection Guide439
- Lubrication Specifications439
- Maintaining the Printer439
Parts Catalog441
- How to Use this Parts Catalog441
- Assembly 1: Covers442
- Assembly 2: Front444
- Assembly 3: Right446
- Assembly 4: Rear448
- Assembly 5: Left450
- Assembly 6: Top452
- Assembly 7: Cable Parts Packet453
- Assembly 8: Optional 550-Sheet Media Drawer and Tray454
- Assembly 9: Optional Special Media Tray Assembly455
- Assembly 10: Optional High-Capacity Input Option (HCIT)456
- Assembly 11: Options and Features458
Index461
Part Number Index467

Lexmark C734dn Service Manual

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Brand	Lexmark
Model	C734dn
Category	Printer
Language	English