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MEMO

410

Table of Contents

Safety Notices2
- Important Safety Notices2
- Laser Safety3
Symbols, Abbreviations, and Trademarks4
- Symbols and Abbreviations4
- Trademarks4
- Table of Contents5
1 Installation Procedure12
Installation Requirements12
- Environment12
- Machine Level13
- Machine Space Requirements13
- Power Requirements13
Optional Unit Combinations15
- Machine Options15
- Controller Options15
Printer Installation16
- Installation Procedure16
- Loading Paper25
- Meter Click Charge29
- Moving the Machine31
- Transporting the Machine31
Options Installation32
- Paper Feed Unit32
- Tray Heater32
Controller Options34
- Overview34
  - SD Card Appli Move35
2 Preventive Maintenance38
User Replaceable Items38
Service Maintenance39
- Recommended Cleaning Procedure39
3 Replacement and Adjustment40
Before You Start40
Special Tools and Lubricants41
- Tools41
Electrical Components42
- Electrical Board Unit42
- IOB (Input/Output Board)45
- Controller Board45
- Installing the New NVRAM47
- PSU (Power Supply Unit) Board48
- High Voltage Power Supply Board 148
- EGB (Engine Board) and High Voltage Power Supply Board 249
- LCD Panel50
- NVRAM Replacement Procedure50
Laser Optics53
- Caution Decal Locations53
- LD Unit53
- Ldb57
- Polygon Mirror Motor57
- Laser Synchronizing Detector Boards58
- LDU Shutter Motor Unit and Sensor59
Paper Feed61
- Paper Feed Roller61
- Paper Friction Pad62
- By-Pass Paper Size Sensor62
- By-Pass Feed Roller, Friction Pad63
- Registration Sensor65
- Paper Volume Sensor, End Sensor and Paper Width Sensor65
- Paper Size Sensor and Temperature/ Humidity Sensor68
- Paper Feed Motor68
- Paper Registration Clutch, Paper Feed Clutch and By-Pass Clutch69
Development70
- Color Development Motor, Color OPC Motor and Black Opc/Development Motor70
- Development Clutch71
- Transfer Belt Contact Motor72
- Toner Supply Motor73
- Transfer Roller Contact Motor73
- ID Sensors75
Drive76
- Drive Unit76
Duplex78
- Duplex Jam Sensor78
- Inverter Sensor79
- Duplex Motor and Inverter Motor79
Fusing81
- Fusing Unit81
- Thermistor and Thermostat81
- Fusing Lamp84
- Fusing Exit Sensor and Paper Exit Sensor85
- Fusing Registration Sensor85
- Fan Direction86
Adjustments87
- Gamma Adjustment87
4 Troubleshooting92
Process Control Results92
Service Call Conditions94
- Summary94
- SC Code Descriptions94
Troubleshooting Guide125
- Blank Print125
- All-Black Print125
- Missing CMY Color126
- Light Print126
- Repeated Spots or Lines on Prints126
- Dark Vertical Line on Prints127
- White Horizontal Lines or Bands128
- Missing Parts of Images128
- Dirty Background128
- Partial CMY Color Dots129
- Dark Irregular Streaks on Prints129
- CMY Color Irregular Streaks129
- Ghosting129
- Unfused or Partially Fused Prints129
- Image Skew130
- Background Stain130
- No Printing on Paper Edge131
- Image Not Centered When It Should be131
Electrical Component Defects132
- Sensors132
Blown Fuse Conditions136
- Power Supply Unit136
- Iob136
Leds137
5 Service Tables138
Service Program Mode138
- Service Mode Operation138
- Exiting Service Mode139
- Remarks140
- Bit Switch Programming142
Service Mode Table143
- Controller Service Mode143
- Engine Service Mode148
- Input Check Table320
- Output Check Table324
Firmware Update327
- Type of Firmware327
- Before You Begin327
- Updating Firmware328
- NVRAM Data Upload/Download331
- Address Book Upload/Download333
- Handling Firmware Update Errors334
Controller Self-Diagnostics336
- Overview336
Using the Debug Log338
- Retrieving the Debug Log from the HDD341
DIP Switches343
- Overview344
- Paper Path345
- Drive Layout346
- Board Structure347
- Printing Process349
- Process Control351
- Toner Supply Control354
- Toner Near End/Toner End Detection356
- Developer Initialization357
- Paper Feed358
- Paper Feed Drive359
- Paper Tray360
- By-Pass Tray Feed and Size Detection363
- Duplex364
Laser Exposure368
- Optical Path369
- Laser Synchronizing Detector370
- LD Safety Switch371
- Automatic Line Position Adjustment372
Photoconductor Unit377
- Drive and Drive Gear Position Sensor378
- Drum Charge and Quenching380
- Drum Cleaning381
- Waste Toner Collection382
- Waste Toner Bottle Full Detection and Set Detection383
- PCU Detection (Development Unit Detection)384
Development386
- Drive387
- Developer Mixing388
- Toner Supply Mechanism389
Image Transfer390
- Transfer Unit Detection and New Unit Detection391
- Drive and Transfer Belt Roller Voltage392
- Transfer Roller Unit394
Fusing397
- Fusing Temperature Control398
- Overheat Protection400
- Drive401
- Controller402
7 Specifications404
- Supported Paper Sizes407
- Software Accessories408
- Machine Configuration409

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