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Repair information 4-5

7525-xxx

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4. Remove the three screws (A) on the rear side of the left cover.

A

Table of Contents

Default Chapter3
- Table of Contents3
Notices and Safety Information11
Table of Contents11
- Laser Notice11
- Aviso sobre O Laser12
- Lithium Warning17
- Safety Information17
Preface20
- Change History20
- Conventions21
- Navigation Buttons21
General Information23
- Models23
- Options and Features24
- Media Handling30
- Digital Imaging Specifications38
Fax Specifications40
- Phone Network Connectivity40
- Fax Resolutions40
- Miscellaneous FAX Specifications40
- Next40
Tools Required for Service41
Acronyms42
Diagnostic Information45
Start45
POR (Power-On Reset) Sequence46
Symptom Tables47
- Printer Symptom Table47
- Scan / Fax / Copy Symptom Table48
- Print Quality Symptom Table49
Error Codes and Messages50
- User Status and Attendance Messages50
- Paper Jam Messages57
- Service Error Messages59
- Fax Error Log Codes71
Service Checks75
- 900.XX-System Software Error75
- 90X.XX Error (902.XX-907.XX)77
- 925.01-Fan Error Service Check78
- Printhead Service Check79
- 950.XX NVRAM Failure Service Check80
- Autocompensator Mechanism Service Check80
- Bin Full Sensor Service Check81
- Dead Printer Service Check82
- Duplex/Manual Feed Sensor (S1) Service Check83
- Front Door Sensor or Switches Service Check84
- Fuser Exit Sensor Service Check85
- Fuser Service Check86
- Input Sensor (S2) Service Check87
- Main Drive Gear Assembly (EP Drive) Service Check88
- Operator Panel Service Check89
  - One or more Operator Panel Buttons Fail89
  - Operator Panel Display Blank, Five Beeps89
  - Operator Panel Display Blank, Printer Beeps Five Times and Pauses90
  - Operator Panel Displays All Diamonds, no Beeps91
  - Operator Panel Displays All Diamonds, Five Beeps91
  - Operator Panel Display Is DIM and Unchanging92
- Op Panel USB Cable Service Check92
- USB Service Check92
- Networking Service Check93
- Print Quality Service Check95
  - Print Quality-Background96
  - Print Quality-Blank Page97
  - Print Quality-Blurred or Fuzzy Print99
  - Print Quality-Half-Color Page99
  - Print Quality-Horizontal Banding99
  - Print Quality-Horizontal Line100
  - Print Quality-Insufficient Fusing100
  - Print Quality-Missing Image at Edge100
  - Print Quality-Mottle (2-5Mm Speckles)100
  - Print Quality-Narrow Vertical Line101
  - Print Quality-Random Marks101
    - Print Quality-Residual Image102
    - Print Quality-Solid Color Page103
    - Print Quality-Vertical Banding103
  - Printhead Service Check104
  - Toner Meter Cycle (TMC) Card105
  - Toner Sensors (Y, C, M, K) on TMC Card105
  - Transfer Roll Service Check106
  - Tray (X) Sensor Service Check107
  - Option Trays 2 and 3 Service Check108
  - 840.XX Service Check110
    - Go Back110
  - Black or Blank Page Copy Service Check112
  - CCD Service Check112
  - Flatbed Motor Service Check112
  - Flatbed Home Position Service Check113
  - ADF Cover Open Service Check114
  - ADF Streak Service Check114
  - ADF Paper Jam Service Check115
  - ADF Feed Errors Service Check116
  - ADF Duplex Service Check117
  - Modem / Fax Card Service Check118
  - Fax Transmission Service Check119
  - Fax Reception Service Check121
  - Escalating a Fax Issue to Second-Level Support123
- User Operator Panel, Menus and Messages124
  - Understanding the Operator Panel124
  - Operator Panel Buttons124
  - Menu Map126
Diagnostic Aids127
- Menu Key Combinations127
- Diagnostics Menu (Diag Menu)128
- Device Tests144
  - Flash Test144
- Printer Setup145
- EP Setup147
- TPS Setup148
- Reports148
  - Main Settings Page148
- Event Log149
- Scanner Tests151
- EXIT Diags156
Configuration Menu157
- Available Tests157
- USB Scan to Local157
- Prt Quality Pages157
- Color Trapping157
- Reports158
  - Menu Settings Page158
  - Event Log158
- Panel Menus158
- PPDS Emulation158
- Demo Mode159
- Factory Defaults159
- Energy Conserve159
- Min Copy Memory160
- Format Fax Storage160
- Auto Color Adj160
- ADF Edge Erase160
- FB Edge Erase161
- Scanner Manual Registration161
  - To Manually Register a Duplex ADF, Perform the Following Steps161
  - To Manually Register the Flatbed, Perform the Following Steps162
- Disable Scanner162
- Font Sharpening163
- Pel Blurring163
- Exit Config Menu163
SE Menu164
- Print SE Menus164
- General164
- Code Revision Info164
- Paper Jams165
  - Avoiding Jams165
  - Understanding Jam Numbers and Locations166
- Updating Printer Firmware172
  - There Are Three Options to Update Firmware on Your Printer. the Instructions for All Three Options Are Listed below172
    - Using the Host Computer to Update the Firmware over USB172
    - Updating the Firmware Using a USB Thumb Drive179
  - Updating the Firmware Using a Networked Computer180
    - Using FTP180
    - Using the Printer's Internal Web Server181
- Theory of Operation183
Repair Information201
- Handling ESD-Sensitive Parts201
- Testing Generic Frus201
Removal Procedures202
Print Engine Removal Procedures202
- Front Cover Assembly Removal202
- Front Middle Cover Removal204
- Left Cover Removal204
- Right Cover Removal207
- Rear Shield Removal207
- AIO Back Cable Cover Removal208
- Top Cover Assembly Removal209
  - Installation211
  - Go Back211
- Autocompensator Mechanism (ACM)-Standard Tray Removal212
- Bin Full Sensor215
- Narrow Media Sensor Flag Removal216
- Controller Board Removal218
- Duplex Reference Edge Removal220
- Duplex Sensor Removal226
- Fuser Assembly Removal228
- Fuser Drive Motor Assembly Removal231
- Fuser Exit Sensor Removal232
- High-Voltage Power Supply (HVPS) Assembly Removal234
  - High-Voltage Power Supply (HVPS) with or Without Spring235
  - High-Voltage Power Supply (HVPS) Without Spring236
  - High-Voltage Power Supply (HVPS) with Spring237
- Image Transfer Unit (ITU)240
- Imaging Unit (IU) Removal245
- Developer Unit Removal247
- Low-Voltage Power Supply (LVPS) Assembly248
- Lower Frame Removal, Right and Left250
  - Left Lower Frame250
  - Right Lower Frame253
- Main Drive Gear Assembly with Motor Removal258
- Pick Tires Removal-Integrated 250-Sheet Media Tray260
- Printhead Removal261
- Imaging Unit (IU) Removal262
- Toner Cartridge Contacts264
- Toner Meter Cycle (TMC) Card Removal266
- Toner Density Sensor (TPS)-Left and Right Removal268
- Tray Present Sensor Removal269
- USB Connector Removal272
- Waste Toner Bottle272
- Waste Toner Bottle Contact Block Removal273
- Wireless Network Antenna274
- Wireless Network Card276
Scanner Component Removal Procedures277
- Flatbed Removal277
  - Preparing and Installing the New Flatbed283
- Flatbed Pivot Link Removal286
- Duplex ADF Rear Cover287
- Duplex ADF Removal288
- Simplex ADF Rear Cover289
- Simplex ADF Removal289
- ADF Input Tray289
- ADF Cable Removal290
- ADF Separator Pad292
- ADF Separator Roll Assembly293
- Bezel Cover294
- Redrive Unit296
- Cover Scanner Left297
- Cover Scanner Right298
Locations309
- Exterior Views309
Preventive Maintenance329
- Safety Inspection Guide329
- Scheduled Maintenance329
  - Maintenance Kit329
- Lubrication Specifications329
Parts Catalog331
- How to Use this Parts Catalog331
- Assembly 1: Covers334
- Assembly 2: Scanner336
- Assembly 3: Paperpath340
- Assembly 4: Electronics 1342
- Assembly 5: Electronics 2344
- Assembly 6: Media Drawers and Trays346
- Assembly 7: Options348
Index349
Part Number Index359

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