HP HP LaserJet Printer 8000 Service Manual Page 230
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202 Chapter 6 Removal and Replacement C4085-91087
Main Gear Assembly
1 Remove the following components in the order listed:
• Toner Cartridge
•Tray 1
•Tray 2
• Transfer Roller Assembly (see figure 6-60 on page 228)
• Back Cover Assembly (see figure 6-6 on page 167)
• Tray 1 Pickup Assembly (see figure 6-24 on page 187)
• Right Lower Door Assembly (see figure 6-16 on page 179)
• Paper Input Unit (PIU) (see figure 6-40 on page 206)
• High Voltage Power Supply (HVPS) (see figure 6-49 on page
215)
• Main Motor (see figure 6-39 on page 205)
Figure 6-36 Main Gear Assembly (1 of 3)
2 Remove 2 screws (figure 6-36 on page 202, callout 1).
CAUTION Be careful not to damage the plastic gears when removing the Main
Gear Assembly.
- Service Manual 1
- Conventions 5
- Chapter Descriptions 6
- Subject Index 7
- Table of Contents 9
- 2 Site Requirements 10
- 3 Operating Overview 10
- 4 Maintenance and Adjustments 11
- 5 Functional Overview 11
- 6 Removal and Replacement 12
- 7 Troubleshooting 15
- 8 Parts and Diagrams 15
- List of Figures 17
- List of Tables 25
- Product Information 29
- Printer Features 30
- Paper Capacities and Sizes 32
- Identification 34
- Specifications 35
- Media Selection Guidelines 39
- Adhesive Labels 40
- Transparencies 41
- Storing Print Media 41
- Shipping Print Media 41
- Product Overview 42
- Formatter Assemblies 46
- Accessories and Options 47
- Ordering Information 48
- Hard Disk 54
- 11 x 17 in, A3 16 MB 16 MB 55
- Legal 16 MB 16 MB 55
- 11 x 17 in, A3 24 MB 24 MB 55
- Service Approach 56
- Exchange Program 57
- Consumables 57
- Toner Cartridge Life 57
- Cartridges 58
- Recycling Toner Cartridges 58
- Technical Assistance 59
- Internet 60
- World Wide Web 60
- Other Areas 60
- Warranty 61
- Warranty Limitations 62
- Regulatory Information 63
- FCC Regulations 63
- Protecting the Environment 64
- HP LaserJet Printer 65
- Material Safety Data Sheet 66
- Environmental Conformity 67
- Declaration of Conformity 68
- Safety Statements 70
- Korean EMI statement 71
- Laser Statement for Finland 71
- Site Requirements 73
- Operating Environment 74
- Space Requirements 75
- Environmental Requirements 77
- Operating Overview 79
- Using the Control Panel 80
- Indicator Lights 81
- Settings and Defaults 82
- Printer Driver Information 82
- Paper Source Default 82
- Resetting the Printer 83
- Control Panel Menus 86
- Information Menu 87
- Paper Handling Menu 88
- Print Quality Menu 90
- Printing Menu 92
- Configuration Menu 95
- I/O Menu 98
- EIO Menu 100
- Resets Menu 102
- Service Mode 103
- Testing the Printer 108
- Maintenance and 109
- Adjustments 109
- Cleaning the Printer 111
- Cleaning Spilled Toner 112
- Preventative Maintenance 113
- Tray Adjustment Procedure 114
- Procedure 116
- Functional 119
- Overview 119
- Power Distribution System 121
- AC Power Distribution 122
- Toner Cartridge Detection 123
- Print Density Adjustment 123
- Formatter System 124
- Resolution Enhancement (REt) 125
- EconoMode 126
- DC Controller System 127
- Engine Test Microswitch 128
- Image Formation System 129
- Toner Cartridge 130
- The Photosensitive Drum 131
- Drum Cleaning 132
- Drum Conditioning 133
- Image Writing 134
- FastRes 1200 135
- Image Developing 136
- Image Fusing 139
- Paper Paths and Components 140
- Printing from Tray 1 143
- Printing from Trays 2 and 3 143
- Printing with the Duplexer 144
- Pickup and Feed System 147
- Lifter Operation 149
- Power Supply 149
- 2 x 500-sheet Input Tray 150
- Control Device Title Location 151
- Power-on Sequence 156
- Receiving Paper 156
- Delivering Paper 157
- Job Separator Mode 158
- Virtual Stacker Mode 158
- Collator Mode 158
- 8-bin Mailbox Components 160
- Mailbox Mode 164
- Stapler Unit Operation 167
- Power-On or Reset Sequence 168
- Paper Feed Cycle 169
- Stapling Cycle 170
- Eject Cycle 170
- Paper Jam Detection 172
- Printer Timing 172
- Removal and 177
- Replacement 177
- Required Tools 179
- User Installable Accessories 180
- Disk Drive 181
- To remove the disk drive: 181
- To reinstall the disk drive: 181
- Duplexer 182
- Envelope Feeder 182
- To Reinstall: 183
- 7-bin Tabletop Mailbox 185
- Hardware Table 188
- Control Panel 191
- AC Access Cover 194
- Back Cover 195
- Front Cover 196
- Left Lower Cover 198
- Top Cover 199
- Diverter Assembly 205
- Lower Right Door Assembly 207
- (figure 6-18, callout 3) 209
- Fan Housing 210
- Fan 1 Motor 211
- Fan Motor 213
- 5 Remove the tray 217
- Tray 1 Pickup Assembly 218
- Feeder Assembly 222
- Formatter Assembly 224
- Fusing Assembly 226
- Laser/Scanner Assembly 228
- Main Gear Assembly 230
- Output Paper Sensor PCA 236
- Paper Size PCA 240
- Registration Assembly 245
- Feed Roller 248
- Tray 1 Separation Pad 249
- Paper Input Unit Sensor (PS2) 251
- Registration Sensor (PS1) 253
- Transfer Roller Assembly 256
- Orientation 260
- Main Drive Assembly 265
- Controller PCA 270
- Pickup Assembly 274
- To Remove the Pickup Roller 279
- Assemblies (2 of 2) 282
- Vertical Transfer Unit (VTU) 283
- Tension Springs 285
- Locating Pins 286
- Adjustable Foot 288
- Left Cover 292
- To reinstall: 295
- Right Cover 296
- Front Top Cover 299
- Trays 4 and 5 302
- Paper Deck Drive Assembly 306
- Tray-Size Sensing PCA 310
- Main Cable 313
- Storage Paper Tray 315
- Front Door (Storage Area) 316
- Front LED PCA 320
- To replace 325
- Paper Path Cover 335
- Face-down Bins 338
- Empty Bin Sensor PCA 341
- Face-up Sensors PCA 346
- Reversing Mechanism Motor 347
- Short Tray 7 352
- Solenoid Reversing Mechanism 353
- Flipper Solenoid 354
- Cover Latch 357
- Flipper Assembly 364
- Transport Belt Motor 368
- Input Paper Guide 370
- Anticurl Strings 376
- Delivery Head Assembly 378
- Diagnostic LED PCA 384
- User Status LED PCA 386
- Adjustable and Fixed Casters 388
- Installation 391
- Back Plate 393
- Stapler Controller PCA 395
- Stapler Bed Assembly 399
- Troubleshooting 403
- Troubleshooting Process 404
- “Printer Messages” 405
- Preliminary Operating Checks 408
- 1. Paper Path 414
- 2. Paper Surface 414
- 3. Paper Storing and 414
- Handling 414
- 4. Paper Type 414
- Power On 415
- Problem Action 416
- Engine Test Button Location 418
- Printing an Engine Test 418
- Event Log 419
- Figure 7-5 Sample Event Log 420
- Most recent error 420
- Print the Event Log 421
- Display the Event Log 421
- Interpret the Event Log 422
- Specifications Guide 423
- Paper Jams 424
- To perform a paper path test: 426
- Customer Print Job 427
- Clearing Paper Jams 428
- Clearing Repeated Paper Jams 428
- Printer Messages 429
- Printer Message Tables 431
- Engine Error Messages 432
- 8-bin Mailbox Error Messages 457
- Stapler Error Messages 463
- Duplexer Error Messages 466
- Diagnostics 468
- 1 Off On On Off 470
- 2 Off On Off Off 470
- 3 Off Off Off On 470
- 4 Off On On On 470
- 3OffOffOffOn 473
- 1 Off On On Off Off 476
- 2 Off On Off On Off 476
- 3 Off Off On Off On 476
- 4 Off On Off On On 476
- Long Short 479
- Error Number/ 479
- Meaning Recommended Action 479
- 1 2 Bin full when running 480
- Power-on Test 482
- 8-bin Mailbox Paper Path Test 483
- Information Pages 489
- Figure 7-11 Sample Menu Map 490
- Configuration Page 491
- Verify Installed Options 493
- Communication 495
- Image Quality 497
- Check the Toner Cartridge 498
- Image Quality Tables 499
- Table 7-27. Fading Print 500
- C4085-91087 Image Quality 473 501
- Table 7-28. Dropout 502
- C4085-91087 Image Quality 475 503
- Table 7-30. Toner Smear 503
- C4085-91087 Image Quality 477 505
- C4085-91087 Image Quality 479 507
- Table 7-36. Image Skew 508
- C4085-91087 Image Quality 481 509
- Table 7-37. Bubble Print 509
- Repetitive Defect Ruler 512
- Image System Troubleshooting 513
- C4085-91087 Image Quality 487 515
- Network Troubleshooting 516
- Verify Host System Operation 518
- Diagrams 519
- C4085-91087 Diagrams 493 521
- C4085-91087 Diagrams 495 523
- C4085-91087 Diagrams 497 525
- C4085-91087 Diagrams 499 527
- C4085-91087 Diagrams 501 529
- PS FUFULL 531
- PS FACEUP 531
- PS ENTRY 531
- Parts and Diagrams 533
- Ordering Parts 534
- Accessories and Supplies 535
- Illustrations and Parts Lists 535
- Paper-Handling Components 536
- Printer Parts and Diagrams 540
- Fig Ref Description Part QTY 545
- 2000-sheet Input Tray 552
- 34 Latch XZ9-0379-000CN 1 558
- 8-bin Mailbox 564
- Finisher 570
- Alphabetical Parts List 572
- Numerical Parts List 583
- C4085-91087 Index 567 595
- Numerics 595
- see also 596
- C4085-91087 Index 569 597
- 570 Index C4085-91087 598
- C4085-91087 Index 571 599
- C4085-91087 Index 573 601
- 574 Index C4085-91087 602
- C4085-91087 Index 575 603
- 576 Index C4085-91087 604
- C4085-91087 Index 577 605
- 578 Index C4085-91087 606
- Service Manual Supplement 611
- (C4781A, C4782A, C4785A) 611
- HP 2000-sheet Input Tray 612
- (C4781A) 612
- HP Multibin Mailbox 612
- (C4785A) 612
- HP Duplex Unit (C4782A) 612
- Contents 615
- New Product Features 621
- Theory of Operation 622
- Features 623
- Paper Path 625
- Theory of Operation 1-5 626
- 1-6 Theory of Operation 627
- Switches Functionality 628
- Operating Modes 629
- 1-10 Theory of Operation 631
- Theory of Operation 1-11 632
- Duplexer Theory of Operation 637
- Removal and Replacement 638
- To remove a photosensor: 651
- Separation Rollers 653
- Assembly 655
- Removal and Replacement 2-19 656
- 2000-sheet Input Tray VTU 657
- Figure 2-19 658
- Figure 2-20 659
- 2000-sheet Input Tray Casters 661
- Figure 2-23 662
- Multibin Mailbox Removal and 663
- Multibin Mailbox Top Cover 665
- Multibin Mailbox Power Supply 666
- 2-32 Removal and Replacement 669
- Removal and Replacement 2-33 670
- Removal and Replacement 2-37 674
- Removal and Replacement 2-39 676
- Removal and Replacement 2-41 678
- Removal and Replacement 2-43 680
- Removal and Replacement 2-45 682
- 2-46 Removal and Replacement 683
- Figure 2-47 685
- Removal and Replacement 2-49 686
- Figure 2-49 687
- Removal and Replacement 2-51 688
- 4 Remove the Caster 689
- 2-54 Removal and Replacement 691
- Troubleshooting Approach 693
- Print a Configuration Page 694
- 3-4 Troubleshooting 695
- Troubleshooting 3-5 696
- C-link Communication Cables 697
- Paper Path Test 698
- 3-8 Troubleshooting 699
- Messages Structure 700
- Error Messages 700
- Figure 3-5 704
- 3-16 Troubleshooting 707
- Troubleshooting 3-17 708
- 3-18 Troubleshooting 709
- Wiring Diagrams 710
- 3-20 Troubleshooting 711
- Troubleshooting 3-21 712
- 3-22 Troubleshooting 713
- Troubleshooting 3-23 714
- 3-24 Troubleshooting 715
- 4-2 Parts 717
- Parts 4-3 718
- 4-4 Parts 719
- Parts 4-5 720
- 4-6 Parts 721
- Multibin Mailbox Components 722
- 4-8 Parts 723
- Parts 4-9 724
- 4-10 Parts 725
- 4-12 Parts 727
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