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Chapter 8 Parts and Diagrams
C4085-91087
Figure 8-6
Printer Internal Components (4 of 4)
1
2
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729
730
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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