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Repair information 4-27

7541-03x

4. Remove the screw (C) from the op panel paper exit guide.

5. Remove the top cover of the guide.

Table of Contents

Default Chapter3
- Table of Contents3
Notices and Safety Information13
- Safety Information15
Preface18
- Conventions18
General Information19
- Maintenance Approach19
- Models19
- Printer Configurations20
- Options and Features21
- Print Engine Specifications22
- Scan Fax and Copy Specifications29
- Tools Required for Service33
- Acronyms34
Diagnostic Information37
- Start37
  - Flatbed / ICC Card NVRAM38
  - Initial Check38
- POR (Power-On Reset) Sequence39
- Print Quality Issues40
- Black Page45
- No Print45
- Stain on Back of Page46
- Failure to Fuse46
- Stains on Edge of Page46
ADF & Scanner Print Quality47
- Image Quality Symptoms47
- Dark Image Quality (Using ADF or Scanner)47
- Vertical Lines (Process Direction Using the ADF)48
- Spots (Using Flatbed Scanner)48
- Skew (Using ADF)50
- Media Damage (Using ADF)51
- Black Page from Scanner52
Paper Jams53
- Clearing and Troubleshooting Paper Jams54
- Duplex Unit Service Check60
- Paper Path Service Checks60
- Paperfeed Unit Service Check63
- MPF Service Check64
- Clearing and Resolving Scanner Jams65
- ADF Paper Jam Service Check72
Error Codes74
- Abnormal Exit Motor74
- 990 XX Service75
- 976 XX Standard Network or Network Card X75
- Abnormal EEPROM75
- Service NCVRAM Mismatch75
- Service NV Failure75
- Service NVRAM Failure75
- Service Code CRC <Loc75
- Service System Board75
- Service NAND Failure75
- 959,XX Service Invalid Firmware75
- Service Memory Error75
- Service Emulation Error75
- Fax T30 Log Error Codes77
Service Checks81
- Black Printhead Error81
- Cyan Printhead Error81
- User Attendance Messages102
  - User Prompts102
  - User Attendance Messages (0-99)105
- Other Symptoms111
- Other Service Checks120
Diagnostic Aids133
- Understanding the Operator Panel and Menus133
- Configuration Menu141
- Diagnostics Mode150
- Theory of Operation161
Repair Information183
- Handling ESD-Sensitive Parts183
- Removal Procedures186
  - Arrangement of Removals in this Chapter186
- Cover Removals187
- Top Removals208
- Front Removals222
- Left Side Removals227
- Right Side Removals243
- Rear Removals255
- HVPS Removal293
- Waste Toner Sensor Removal294
Scanner Area Removals295
- ADF Assembly Removal295
- ADF Pick Roll Removal296
- ADF Separator Roll Removal297
- Flatbed Assembly Removal298
- Flatbed Front Cover299
- UICC Removal302
- Touchscreen Assembly Removal303
- ADF Relay Board304
- ICC Board305
- CCD Chassis306
- CCD Belt308
- Optical Paper Size Sensor309
- ADF Cable310
- ADF Motor Frame311
- ADF Solenoid314
- ADF Drive Clutch314
- ADF Input Tray315
- ADF Main Feeder316
- ADF Clutch319
- ADF Hinge319
- FB Hinge320
- Tray Paper Size Sensors320
- ADF Cover Open / ADF Pick Sensor324
- ADF Cover Open Sensor Actuator325
- Paper Present / Paper in Sensor326
- Paper Present Sensor Actuator327
- Paper in Sensor Actuator327
- Paper Path Sensor328
- Scan Sensor328
- Scan Sensor Actuator330
- Scan Sensor Cover (Not a Fru)331
- Duplex Timing Sensor334
- Duplex out (Scan Out) Sensor339
- Duplex out Sensor Actuator340
- Flatbed Cover Closed Sensor341
- Flatbed Upper Cover343
- Outer ADF Top Cover345
- Inner ADF Top Cover346
- ADF Relay Card Cover349
- Left ADF Cover349
- Right ADF Cover352
Duplex Unit Component Removals354
- Duplex Clutch Removal354
- Duplex Timing Belt Removal355
- Duplex Exit / MPF Sensor Removal355
- MPF Clutch Removal356
- MPF Tray Assembly Removal357
Paperfeed Unit Component Removals359
- Separating the MPF Tray and Main Tray Paperfeed Units359
- Paperfeed Unit Clutch Removal361
- Registration Sensor (MPF Tray) Removal361
- Registration Sensor Actuator Removal362
- Static Discharge Brush Removal362
- Torque Limiter Removal363
- Upper and Lower Registration Springs Removal363
Paperfeed Maintenance Kit Removals364
- Pick Roll Removal364
- Separator Roll Removal365
- Registration Roll Removal366
- MPF Roll Removal367
- MPF Pad Removal369
- Exit Guide (Paper Exit) Roll Removal372
- Option Paper Feed Removals378
- Adjustments387
Locations389
- Print Engine Cross Section389
- Flatbed / ADF Sensors391
- Option Feeder Locations423
Preventive Maintenance427
- Safety Inspection Guide427
- Lubrication Specifications427
- Scheduled Maintenance427
Parts Catalog429
- How to Use this Parts Catalog429
- Assembly 1: Covers430
- Assembly 2: Flatbed and ADF432
- Assembly 3: Flatbed434
- Assembly 4: ADF 1436
- Assembly 5: ADF 2438
- Assembly 6: Duplex Components 1440
- Assembly 7: Duplex Components 2442
- Assembly 8: Paper Exit444
- Assembly 9: Base 1446
- Assembly 10: Base 2448
- Assembly 11: Base 3450
- Assembly 12: Paper Feed452
- Assembly 13: Electrical 1454
- Assembly 14: Electrical 2456
- Assembly 15: Upper Assembly458
- Assembly 16: Printhead Controller Board Cables460
- Assembly 17: Paper Trays462
- Assembly 18: Fuser464
- Assembly 19: 550 Sheet Option Feeder Covers466
- Assembly 20: 550 Sheet Option Feeder Base468
- Assembly 21: 550 Sheet Option Feeder Paper Feed470
- Assembly 22: 550 Sheet Option Feeder Tray472
- Assembly 23: Maintenance Kits, Power Cords, and Options474
Index474
Part Number Index481

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