hp LaserJet
4100mfp 4101mfp
service
addendum
hp LaserJet 4100mfp series
service addendum
Copyright Information
Warranty
Trademark Credits
®
®
© 2002 Hewlett-Packard
Company
The information contained in this
document is subject to change
without notice.
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and the Acrobat logo are either
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All Rights Reserved.
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Incorporated in the United States
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Reproduction, adaptation, or
translation without prior written
permission is prohibited, except
as allowed under the copyright
laws.
Hewlett-Packard makes no
warranty of any kind with respect
to this information.
®
HEWLETT-PACKARD
Microsoft ,MS-DOS, and
Windows are U.S. registered
trademarks of Microsoft Corp.
®
SPECIFICALLY DISCLAIMS
THE IMPLIED WARRANTY OF
MERCHANTABILITY AND
FITNESS FOR A PARTICULAR
PURPOSE.
Publication number
C9148-90909
Netscape™ is a U.S. trademark
of Netscape Communications
Corporation.
Second edition, April 2002
Hewlett-Packard shall not be
liable for any direct, indirect,
incidental, consequential, or
other damage alleged in
connection with the furnishing or
use of this information.
TrueType™ is a U.S. trademark
of Apple Computer, Inc.
®
ENERGY STAR is a U.S.
Quick reference
service PIN code:
04410002
registered service mark of the
United States Environmental
Protection Agency.
Hewlett-Packard Company
11311 Chinden Boulevard
Boise, Idaho 83714 U.S.A.
Table of contents
List of figures
List of tables
1 Product Information
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Product configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
HP LaserJet 4100mfp (C9148A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
HP LaserJet 4101mfp (C9149A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Product features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Product speed and throughput . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Image quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Paper handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Copying capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Product specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Media specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Special considerations for ADF documents. . . . . . . . . . . . . . . . . . . . . 18
Supported media for the glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Model and serial numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Product overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Back view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2 Service approach
Service approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Major assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Contact HP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
World Wide Web . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
HP support assistant CD-ROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
HP authorized resellers and support . . . . . . . . . . . . . . . . . . . . . . . . . . 25
HP service agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3 Operation
Using the ADF unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
General guidelines for using the ADF unit . . . . . . . . . . . . . . . . . . . . . 28
Using the glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
General guidelines for using the glass. . . . . . . . . . . . . . . . . . . . . . . . . 29
Using the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
C9148-90909
Table of contents 3
Layout and operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Navigation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Walk-up copy display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Status bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Configure device, diagnostic, and service menus . . . . . . . . . . . . . 32
Menu map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4 Maintenance
Cleaning the product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
General guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Running the cleaning page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Cleaning the ADF delivery guide (clear mylar strip) . . . . . . . . . . . . . . 37
User-replaceable parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Replacing user-replaceable parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Updating product firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Downloading a remote firmware update . . . . . . . . . . . . . . . . . . . . . . 41
Installing the update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
RFU installation messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Using HP Web JetAdmin (single update) . . . . . . . . . . . . . . . . . . . 42
Using HP Web JetAdmin (multiple or unattended update) . . . . . . 42
Windows parallel connection (local printer) . . . . . . . . . . . . . . . . . 43
Windows parallel connection (network printer) . . . . . . . . . . . . . . . 43
Troubleshooting RFU installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
RFU installation error messages . . . . . . . . . . . . . . . . . . . . . . . . . 44
Performing hard-drive disk initialization . . . . . . . . . . . . . . . . . . . . . . . 45
Cold Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Performing automatic Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Performing manual calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Lead adjustment for the ADF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Center adjustment for the ADF . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Leading-edge adjustment for the glass . . . . . . . . . . . . . . . . . . . . . 49
Side-edge adjustment for the glass . . . . . . . . . . . . . . . . . . . . . . . . 50
5 Theory of operation
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Document transportation process. . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Document exposure system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Light-conversion process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
General descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Scan-unit components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
ADF components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Copy processor board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
CPB terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Typical scanning-process flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Copy processor board LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Scanner controller board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
ADF motor circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Optical-unit motor circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Scan-unit intake-fan motor circuit . . . . . . . . . . . . . . . . . . . . . . . . . 61
4 Table of contents
C9148-90909
Scanner controller board connectors . . . . . . . . . . . . . . . . . . . . . . . 62
Intermediate PCB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Overcurrent and overvoltage protection . . . . . . . . . . . . . . . . . . . . . 63
Power-supply block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Optical unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Inverter PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Scanning lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
CCD driver PCB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
ADF document-feed system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
ADF cover sensor (PS10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Document-detect sensor (PS2) . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Leading-edge sensor (PS1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
ADF motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Document pickup process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Document jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Scan-unit intake fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
6 Removal and replacement
Removal and replacement strategy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Required tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Before performing service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
After performing service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Common fasteners. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Parts removal order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
User-replaceable parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
ADF input tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
ADF pickup roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
ADF separation roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
ADF separation pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
ADF unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Assemblies and covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Control-panel door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Scan-unit right-side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Copy processor board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Scan-unit left-side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Intake fan filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Formatter cage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Scan unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Printing-unit top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Scanning lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Optical unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
ADF door open sensor (PS10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Optical-unit drive gear/motor assembly . . . . . . . . . . . . . . . . . . . . . . . . 99
Scan-unit power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Inverter PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Scanner controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Intake fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
C9148-90909
Table of contents 5
7 Troubleshooting
Troubleshooting process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Preliminary operating checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Installation conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Media condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Unit condition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Basic troubleshooting process flow. . . . . . . . . . . . . . . . . . . . . . . . . . 113
Basic troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Power-on defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Troubleshooting with the control panel. . . . . . . . . . . . . . . . . . . . . . . . . . 117
Control-panel display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Event log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Print the event log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Interpret the event log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Display the event log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Control-panel messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Troubleshooting with the copy processor board . . . . . . . . . . . . . . . . . . 124
User-level and service-level diagnostics . . . . . . . . . . . . . . . . . . . . . . . . 126
ADF paper-path test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
To print a paper-path test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Diagnostic tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
To perform a diagnostic test . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Service-level diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
To access the service menu (PIN code: 04410002) . . . . . . . . . . 127
Jam troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Clearing repeated ADF jams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Configuration page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Configuration-page elements . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
JetDirect page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
JetDirect-page elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Supplies status page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Supplies-page elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Usage page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
File directory page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
File-directory-page elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Image-formation troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Checking the print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
EconoMode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Image-defect tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Media troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Isolate a paper path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Use the straightest paper path. . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Isolate the source of the jam . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Determine where media jams occur . . . . . . . . . . . . . . . . . . . . . . 140
Is the MFP is misfeeding or creating multifeed jams . . . . . . . . . . 140
Isolate a media type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Wiring diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
6 Table of contents
C9148-90909
8 Parts and diagrams
Ordering parts, supplies and getting support. . . . . . . . . . . . . . . . . . . . . . 144
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Related documentation and software . . . . . . . . . . . . . . . . . . . . . . . . 144
Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Common hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
HP Laserjet 4100 differences. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
How to use the parts lists and diagrams . . . . . . . . . . . . . . . . . . . . . . . . . 147
Parts lists and diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Index
C9148-90909
Table of contents 7
8 Table of contents
C9148-90909
List of figures
Figure 1. Model and serial number label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 2. Product parts (front view; right side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 3. Optical-unit lock (front view; left side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 4. Product parts (back view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 5. Major assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 6. Using the ADF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 7. Using the glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 8. Control panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 9. Navigation buttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 10. Top-level control-panel menu display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 11. MFP menu map 1 of 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 12. MFP menu map 2 of 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 13. Open the delivery-guide cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 14. Remove the clear plastic sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 15. Replace the clear, plastic sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 16. Sample calibration target page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 17. Manual calibration registration lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 18. MFP block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 19. Scan-unit components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Figure 20. ADF-unit components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 21. Copy processor board components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 22. Copy processor board LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Figure 23. Scanner controller board connectors (shield off). . . . . . . . . . . . . . . . . . . . . . . . . 62
Figure 24. Power-supply block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Figure 25. Optical unit block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Figure 26. Scanning process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Figure 27. Signal conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Figure 28. Document transport path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Figure 29. Release the ADF input-tray hinge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Figure 30. Remove the ADF input tray. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Figure 31. Release the roller shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Figure 32. Remove the roller shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Figure 33. Remove the ADF pickup roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Figure 34. Remove the ADF separation roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Figure 35. Remove the ADF separation pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Figure 36. Replace the ADF separation pad spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Figure 37. Disconnect the cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Figure 38. Remove the ADF unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Figure 39. Remove the print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Figure 40. Remove the control-panel wire-harness cover . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Figure 41. Disconnect the control-panel grounding strip . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Figure 42. Release the control-panel door-support pins . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Figure 43. Remove the control-panel door. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Figure 44. Remove the product serial- and model-number panel . . . . . . . . . . . . . . . . . . . . 81
Figure 45. Remove the right-side cover screw. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Figure 46. Remove the scan-unity right-side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Figure 47. Disconnect the ADF cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Figure 48. Disconnect the high-speed copy connect cable . . . . . . . . . . . . . . . . . . . . . . . . . 83
Figure 49. Remove the left-side screw. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
C9148-90909
List of figures 9
Figure 50. Gently pry the top edge of the left-side cover. . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Figure 51. Remove the scan-unit left-side cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Figure 52. Remove the intake filter.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Figure 53. Remove the formatter-cage cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Figure 54. Slide the formatter cage toward the back of the product . . . . . . . . . . . . . . . . . . 87
Figure 55. Disconnect the formatter high-speed copy connect cable . . . . . . . . . . . . . . . . . 88
Figure 56. Secure the optical unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Figure 57. Disconnect the CPB cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Figure 58. Disconnect the scan unit cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Figure 59. Remove the scan unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Figure 60. Remove the top-cover rear-mounting screws . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Figure 61. Remove the printing-unit top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Figure 62. Remove the glass mounting screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Figure 63. Remove the glass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Figure 64. Note the cable routing pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Figure 65. Remove the scanning lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Figure 66. Scanning-lamp wire harness routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Figure 67. Release the optical unit ribbon cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Figure 68. Optical-unit ribbon-cable clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Figure 69. Release the tension-spring bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Figure 70. Remove the optical unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Figure 71. Optical-unit drive-belt tension bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Figure 72. Optical-unit ribbon cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Figure 73. Remove the ADF door open sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Figure 74. Remove the optical-unit cover plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Figure 75. Remove the optical-unit drive gear/motor assembly . . . . . . . . . . . . . . . . . . . . . 100
Figure 76. Remove the power-supply shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Figure 77. Remove the power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Figure 78. Remove the inverter PCB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Figure 79. Unplug the connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Figure 80. Grasp the scanner controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Figure 81. Remove the scanner controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Figure 82. Remove the fan mounting screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Figure 83. Remove the intake fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Figure 84. Correctly orient the intake fan and bracket. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Figure 85. Basic troubleshooting flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Figure 86. Sample MFP event-log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Figure 87. Control-panel display of the event log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Figure 88. Copy processor board LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Figure 89. Sample configuration page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Figure 90. Sample JetDirect page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Figure 91. Sample supplies status page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Figure 92. Sample usage page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Figure 93. Sample file-directory page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Figure 94. Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Figure 95. Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Figure 96. Top-cover assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Figure 97. Scan unit (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Figure 98. Scan unit (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Figure 99. Glass, formatter,CPB, and cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Figure 100. ADF unit (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Figure 101. ADF unit (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
10 List of figures
C9148-90909
List of tables
Table 1.
Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
ADF/flatbed-unit acoustical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Skew specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Supported paper sizes and weights for the ADF . . . . . . . . . . . . . . . . . . . . . . . . 18
General cleaning guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
User-replaceable parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Print-unit maintenance kit parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Copy processor board LEDs (initialization sequence) . . . . . . . . . . . . . . . . . . . . . 59
Scanner controller board connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Low-voltage components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Common fasteners found in the MFP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Parts-removal tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Primary steps for troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Basic troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Power malfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Firmware-update event-log errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Control-panel error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Troubleshooting copy processor board LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
General ADF jam troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Image-quality checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Image defects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Technical support websites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Accessories and supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Screws used in the ADF unit and scan unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
HP LaserJet 4100 differences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Top-cover assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Scan unit (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Scan unit (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Glass, formatter, CPB, and cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
ADF unit (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
ADF unit (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Numerical parts list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.
Table 19.
Table 20.
Table 21.
Table 22.
Table 23.
Table 24.
Table 25.
Table 26.
Table 27.
Table 28.
Table 29.
Table 30.
Table 31.
Table 32.
Table 33.
Table 34.
Table 35.
Table 36.
Table 37.
C9148-90909
List of tables 11
12 List of tables
C9148-90909
1
Product Information
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Product configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
HP LaserJet 4100mfp (C9148A). . . . . . . . . . . . . . . . . . . . . . . . . . . 14
HP LaserJet 4101mfp (C9149A). . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Product features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Product speed and throughput . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Image quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Paper handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Copying capability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Product specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Media specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Special considerations for ADF documents . . . . . . . . . . . . . . . . . . 18
Supported media for the glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Model and serial numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Product overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Back view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
C9148-90909
1 Product Information 13
Introduction
With the HP LaserJet 4100 series multifunction printer (MFP), a workgroup can print, make
copies, and send digital documents using a single device. Multiple functions can occur
simultaneously in the MFP.
This service manual is an addendum to the HP LaserJet 4100 series printer service manual.
The HP LaserJet 4100mfp can be upgraded to the HP LaserJet 4101mfp by ordering the
following parts:
• one additional 500-sheet media input tray (C8055A)
• duplex printing accessory (for automatic two-sided printing (C8054A)
• digital sending software (C7140A)
Note
The terminology used in this manual contains minor differences from the HP LaserJet 4100 series
printer service manual. These differences reflect changes made since the publication of the HP
LaserJet 4100 series printer service manual.
Product configurations
The HP LaserJet 4100mfp series is available in two configurations.
HP LaserJet 4100mfp (C9148A)
●
64 MB RAM; 5 GB (or larger) hard disk for RIP ONCE, transmit and scan once; job retention;
and font, form, and signature storage
●
●
●
●
●
HP Jetdirect 10/100 Base-TX print server card for network connection
100-sheet media input tray
500-sheet media input tray
automatic document feeder (ADF) with 30-sheet capacity
embedded scan to e-mail
HP LaserJet 4101mfp (C9149A)
●
●
●
●
all of the features of the HP LaserJet 4100mfp listed above
one additional 500-sheet media input tray
a duplex printing accessory (for automatic two-sided printing)
HP digital-sending service software version 3.0 (or later)
• full send-to-e-mail capability
• SMTP mail service support
• Lightweight Directory Access Protocol (LDAP) compatibility
Note
The HP LaserJet 4101mfp is available only in the United States and Canada.
14 Product Information
C9148-90909
Product features
Product speed and throughput
●
copying of letter-size media at 25 pages per minute (ppm) or A4-size media at 24 ppm
●
monochrome scanning of letter-size originals at 25 ppm or A4-size originals at 24 ppm, and
color scanning at 8 ppm
●
●
●
●
●
instant-on fuser
scan-once copying
RIP ONCE copy capability
scan-ahead capability to start copying or sending while the printer is busy
monthly duty cycle of 150,000 pages
Image quality
●
FastRes 1200: 1200 dots per inch (dpi) print quality for fast, high-quality printing of business
text and graphics
●
●
●
copying and scanning at a resolution of 600 pixels per inch (ppi)
up to 256 levels of gray for smooth, photo-like images
HP print cartridge for crisp, sharp output
Paper handling
●
●
●
●
●
●
●
●
HP LaserJet 4100mfp: the 100-page and 500-page input trays are standard
HP LaserJet 4101mfp: the 100-page and two 500-page input trays are standard
capable of copying on a wide range of media sizes, types, and weights
expandable to hold up to 1600 sheets of media
standard 250-sheet face-down output
duplexing (standard on the HP LaserJet 4101mfp)
glass, which can accommodate media sizes up to letter/A4 size
ADF with 30-page capacity to handle media sizes up to legal size
Copying capability
●
●
●
●
●
easy-to-use copy functionality
document collation
multiple copies
multiple pages per sheet (n-up)
document reduction and enlargement
• ADF: 25 percent to 200 percent in one-percent increments (in ten-percent increments
when the REDUCE or ENLARGE button is held down)
• Flatbed glass: 25 percent to 400 percent in one-percent increments (in ten-percent
increments when the REDUCE or ENLARGE button is held down)
●
●
automatic page-to-page enlargement or reduction
image-quality improvement through background removal, best-quality mode, and contrast
adjustment
C9148-90909
1 Product Information 15
Expandable design
●
stackable 500-sheet trays (up to two additional trays can be added to the HP LaserJet
4100mfp, and one additional tray can be added to the HP LaserJet 4101mfp)
●
●
●
●
duplex printing accessory (standard with the HP LaserJet 4101mfp)
HP Fast InfraRed printing adapter (FIR port)
digital-sending service software (standard with the HP LaserJet 4101mfp)
expandable memory through installation of additional dual inline memory modules (DIMMs)
Product specifications
Table 1. Physical specifications
4100mfp (print unit, scan unit, and ADF unit)
Height
637 mm (25.1 inches)
Depth
520.7 mm (20.5 inches)
805 mm (31.7 inches)
26 kg (56.5 pounds)
Width
Weight
Scan unit only
Height
140 mm (5.6 inches)
Depth
540 mm (21.6 inches)
Width
415 mm (16.6 inches)
Weight
approximately 5 kg (11.1 pounds)
ADF unit only
Height
152 mm (6.1 inches)
Depth
344 mm (13.8 inches)
Width
415 mm (16.6 inches)
Weight
approximately 3 kg (6.4 pounds)
Table 2. Performance
Category
Specification
Scanning speed (ADF mode)
Scanning speed (flatbed mode)
Copy speed
139 mm/second (5.6 inches/second)
69 mm/second (2.8 inches/second)
25 ppm (letter)
24 ppm (A4)
Copy resolution
600 by 600 ppi optical
600 by 600 ppi optical
Digital send resolution
16 Product Information
C9148-90909
Table 3. ADF/flatbed-unit acoustical specifications
Category
Specification
Sound Power Level, L
(1 bel = 10 decibels)
●
●
Scanning: 6.7 dB (A)
Standby: 5.2 dB (A)
WAd
Note
Note
Testing per International Standard Organization (ISO) 9296.
“Operating” means that the product is copying and printing continuously at 25 ppm. Values are
subject to change. See http://www.hp.com/lj4100mfp for current information.
Table 4. Skew specifications
Print unit
Tolerance
Cut paper
Envelope
Skew
1.5 mm (.03 inch) over 260 mm (10.24
inches) length---simplex
6.0mm (.24 inch) over 220mm
(8.66 inches) length
1.50 mm (.03 inch) over 260 mm (10.24
inches) length---duplex
First line
6.0 mm (.24 inch) +/- 2mm (.08 inch)
15mm (.59 inch) +/- 4.5 mm (.18 inch)
leading edge
Left margin
5.0 mm (.20 inch) +/- 1.5 mm (.06 inch)
15mm (.59 inch) +/- 4.5 mm (.18 inch)
None
Text stretching
1 percent for cut sheet---simplex
1 percent for cut sheet---duplex
Scan unit
Tolerance
Skew
ADF
Glass
<= 1 percent
<= 1 percent
Leading edge
Left margin
+/- 2 mm (.08 inch)
+/- 1 mm (.04 inch)
+/- 0.6 percent
+/- 1 mm (.04 inch)
+/- 1 mm (.04 inch)
+/- 0.6 percent
Parallel (vertical
and horizontal)
Image length and
width
+/- 1.2 percent
+/- 1 percent
C9148-90909
1 Product Information 17
Media specifications
Note
This section refers to the MFP only. See the HP LaserJet 4100 series printer service manual for
printing specifications, or see the Print Media Guide for the HP LaserJet printer family for general
requirements.
Table 5. Supported paper sizes and weights for the ADF
Size
Dimensions
Weight
2
Letter
216 by 279 mm
(8.5 by 11 inches)
50 to 105 g/m
(13 to 28 lb)
A4
210 by 297 mm
(8.3 by 11.7 inches)
Legal
216 by 356 mm
(8.5 by 14 inches)
Custom sizes
Minimum:
60 to135 g/m2
(16 to 36 lb)
148.5 by 210 mm
(5.9 by 8.3 inches
Maximum:
215.9 by 355.6 mm
(8.5 to 14 inches)
Special considerations for ADF documents
●
●
●
●
●
Documents must be free of tears or perforations.
Documents must be square or rectangular and in good condition (not fragile or worn).
Documents must be free of glue, correction fluid, or wet ink.
Remove sticky notes, tape flags, staples, and paper clips.
Multipart forms cannot be used in the ADF.
Supported media for the glass
The glass can accommodate the following types of media:
●
●
●
letter- or A4-size and smaller originals, books, manuals, receipts, and similar documents
irregular and worn documents, stapled documents, and photographs
multiple-page letter-size documents
18 Product Information
C9148-90909
Model and serial numbers
The model number and serial number are listed on an identification label located underneath the
control panel door.
The serial number contains information about the country/region of origin, product revision level,
production code, and production number of the product.The label also contains power rating and
regulatory information.
Figure 1.
Note
Model and serial number label
If the control panel fails, the model and serial number label panel must be removed (see “Control-
panel door” on page 79) and installed on the replacement control panel.
C9148-90909
1 Product Information 19
Product overview
Front view
1
2
5
4
3
Figure 2.
Product parts (front view; right side)
1
2
3
automatic document feeder (ADF) input (with sliding media guides)
ADF cover (lifts for access to the glass)
control-panel door (provides access to the print cartridge; serial and model numbers are
located on a panel underneath the door)
4
5
control panel
output bin (for printed output and copies)
6
Figure 3.
Optical-unit lock (front view; left side)
optical-unit lock
6
20 Product Information
C9148-90909
Back view
1
8
7
2
6
3
5
4
Figure 4.
Product parts (back view)
1
2
3
4
5
6
7
8
ADF connector cable
straight-through output door
power connection (from power source to print unit)
hard disk
HP JetDirect card
memory access door (more than one DIMM can be installed)
power jumper cable (from print unit to scan unit)
ADF output bin
C9148-90909
1 Product Information 21
22 Product Information
C9148-90909
2
Service approach
Service approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Major assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Contact HP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Contact HP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
World Wide Web. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
HP support assistant CD-ROM. . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
HP authorized resellers and support . . . . . . . . . . . . . . . . . . . . . . . 25
HP service agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2 Service approach 23
Service approach
Repair of the printer normally begins with a three-step process:
1
2
3
Isolate the problem to the major system (the host computer, the network and/or server, or
MFP major assemblies).
Determine whether the problem is located in one of the paper-handling devices or in the
product engine.
Troubleshoot the problem using the procedures in the troubleshooting chapter of this
manual. See “Troubleshooting” on page 109.
When a faulty part is identified, repair is usually accomplished by assembly-level
replacement of field replaceable units (FRUs). Some mechanical assemblies can be
repaired at the subassembly level. Hewlett-Packard does not support replacement of
components on the printed circuit boards (PCBs).
Major assemblies
1
2
3
Figure 5.
Major assemblies
1
2
3
automatic document feed (ADF) unit
scan unit
print unit
24 Service approach
C9148-90909
Contact HP
World Wide Web
Printer drivers, updated HP printer software, and product and support information can be
obtained from the following websites:
●
●
●
●
●
●
U.S., http://www.hp.com/support/lj4100
Europe, http://www.hp.com/support/lj4100
China, ftp://www.hp.com.cn/support/lj4100
Japan, ftp://www.jpn.hp.com/support/lj4100
Korea, http://www.hp.co.kr/support/lj4100
Taiwan, http://www.hp.com.tw/support/lj4100,
or the local driver website, http://www.dds.com.tw
HP support assistant CD-ROM
This support tool offers a comprehensive online information system designed to provide
technical and product information about Hewlett-Packard products. To subscribe to this quarterly
service in the U.S. or Canada, call (1) (800) 457-1762. In Hong Kong, Indonesia, Malaysia, or
Singapore, call Mentor Media at (65) 740-4477.
HP authorized resellers and support
To locate HP authorized resellers and support, call (1) (800) 243-9816 in the U.S. or
(1) (800) 387-3867 in Canada
HP service agreements
Call (1) (800) 743-8305 in the U.S. or (1) (800) 268-1221 in Canada.
C9148-90909
2 Service approach 25
26 Service approach
C9148-90909
3
Operation
Using the ADF unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
General guidelines for using the ADF unit . . . . . . . . . . . . . . . . . . . 28
Using the glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
General guidelines for using the glass . . . . . . . . . . . . . . . . . . . . . . 29
Using the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Layout and operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Navigation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Walk-up copy display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Status bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Menus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3 Operation 27
Using the ADF unit
The automatic document feeder (ADF) is a fast, convenient way to feed multiple-page originals
for copying or digital-sending. You can load the ADF with as many as 30 sheets of paper. The
ADF accepts documents that meet the following specifications:
●
●
●
single-sided or double-sided originals
documents on standard letter-size, A4-size, and legal-size paper
documents ranging in size from 148.5 by 210.0 mm (5.9 by 8.3 inches) to 215.9 by
355.6 mm (8.5 by 14.0 inches)
●
●
●
●
documents ranging in weight from 50 to 105 g/m2 (16 to 28lb)
documents that are free of tears or perforations
documents that are square or rectangular and in good condition (not fragile or worn)
documents that are free of glue, correction fluid, wet ink, sticky notes, tape flags, staples, or
paper clips
CAUTION
Do not use multipart forms.
The ADF transports the original document through the ADF paper path. Copies made using the
ADF are delivered to the output bin beneath the scan unit.
General guidelines for using the ADF unit
Figure 6.
Note
Using the ADF
The source documents must be placed in the ADF input with the side you intend to copy facing up.
1
Before placing documents in the ADF, prepare the documents by doing the following:
• flatten curls or wrinkles
• remove staples, paper clips, sticky notes, and similar materials
2
3
Place documents in the ADF input tray.
On the control panel, select the sending or copying options you want to use. See the “Walk-
up copying” and “Sending to e-mail” sections in the use guide for information about these
functions.
4
5
After making your selections, press START. Copies are sent to the output bin beneath the
scan unit.
When the scan is complete, remove the original document from the ADF output.
28 Operation
C9148-90909
Using the glass
You can also use the digital-sending and copying features by using the glass, located below the
ADF. The glass can accommodate letter- or A4-size and smaller originals, books, manuals,
receipts, and similar documents. Irregular and worn documents, stapled documents, and
photographs can also be easily sent or copied using the flatbed.
General guidelines for using the glass
Figure 7.
Using the glass
1
Open the ADF cover and place the original document face-down on the glass. Lower the
cover.
2
On the control panel, select the sending or copying options you want to use. See the “Walk-
up copying” and “Sending to e-mail” sections in the use guide for information about these
functions.
3
4
After making the selections, press START. Copies are sent to the output bin beneath the
flatbed.
When the scan is complete, remove the original document from the glass.
C9148-90909
3 Operation 29
Using the control panel
Layout and operation
1
2
3
4
5
6
7
8
9
10
11
13
12
Figure 8.
Control panel
1
? (Help): provides Help files that contain information about the control-panel display when
problems occur.
2
3
Control-panel display.
Navigation buttons: four arrow buttons that are used to move among elements on the
control-panel display. Use the central SELECT ( ) button to choose an element or enter a
menu.
4
5
6
7
8
9
C (Clear): resets the copy count or other numeric entries.
MENU: use to choose device configuration menus on the control panel.
Status lights: Ready light, Data light, and Attention light.
Light and dark buttons: use to increase or decrease the brightness of the copy image
REDUCE and ENLARGE buttons: use to scale the copy size.
RESET: returns all current job settings to their default values.
10 STOP: cancels a copy job, digital send job, or print job.
11 START: begins or resumes a job.
12 Numeric keypad and keyboard: the keypad is used to type numerical values. The keyboard is
used for digital-sending features and for typing other data.
Hint
If the MFP is put into a paused mode (see “Menu map” on page 33), the control panel displays
the message Pausedat the top of the display. To return the MFP to the ready mode, press MENU
and then use the navigation buttons (callout 3) to highlight RESUMEon the control-panel display.
Press the SELECT ( ) button. The message displayed on the control panel changes from Paused
to Ready.
The MFP paused mode is not the same as PowerSave mode. When the MFP is in PowerSave
mode, the control-panel displays the message POWERSave On at the top of the display. When in
PowerSave mode, pressing any key or button on the control panel will return the MFP to the ready
state.
30 Operation
C9148-90909
Navigation
By pressing the arrow navigation buttons, you can shift focus between objects on the control-
panel display to describe the document to be handled and the actions to be performed. A bold
border around a graphic object or a reverse video effect in a text list indicates the current focus.
Use the central SELECT ( ) button to select menus.
Select
Move up
Move left
Move right
Move down
Figure 9.
Navigation buttons
Walk-up copy display
Use the walk-up copy display menu on the control-panel display to describe the original
document and to specify the actions to be taken and their parameters. The primary walk-up copy
display menu choices are:
●
●
●
Describe Original
Copy Settings
Send Options
After power is turned on the MFP initializes and the top-level menu display appears when the
MFP is ready to process jobs.
Figure 10.
Top-level control-panel menu display
The Describe Original menu is used for both digital-sending and copying. The other menus are
addressed in the “Walk-up copying” and “Sending to e-mail” sections in the use guide.
Status bar
The status bar is the uppermost line of available text on the control-panel display.
●
The status line shows both product-status messages and user prompts. When the product is
idle, this line displays Ready To Copy, Accepting Copy Jobs, or Ready. During scanning, the
line might read Scanning Page x. During copying, you might see Data Recieved
Processing Job. Error messages are not communicated on the status line, but they appear
in a text box overlay that blocks normal display views until the message is cleared.
●
The copy count shows the number of copies selected. This selection is made using the
keypad. Acceptable values are from 1 to 99.
C9148-90909
3 Operation 31
Menus
The HP LaserJet 4100mfp series uses a system of control-panel menus to set job parameters,
set system defaults, and manage product performance and features. Menu options are reached
by pressing the MENU button on the right side of the control-panel display and scrolling through
the list to locate the option you want to use. The following menus are available.
●
●
●
●
●
●
●
Pause/Resume (see Hint on page 30)
Retrieve job
Information
Paper handling
Configure device
Diagnostic
Service (PIN code: 04410002)
For more information about menus, see “Control panel and control panel menus” in the use
guide.
Configure device, diagnostic, and service menus
The configure device menu is used to establish the product’s default settings. The selected
defaults can be locked by the system administrator. You can override the default settings at the
control panel for the current job only. It might be necessary to reset these options to factory
defaults when troubleshooting the MFP unit.
The diagnostic menu is used to calibrate and test MFP components. The diagnostic menu can
also be used to print or view an event log. An event log records the number and type of errors the
product has experienced.
The service menu is used by HP-authorized service representatives only and is protected by an
eight-digit personal identification number (PIN). See “Service menu” on page 127. The service
menu can be used to verify the serial number of the MFP unit.
32 Operation
C9148-90909
Menu map
The menu map is a graphical representation of the MFP menus. Press the MENU button on the
control panel to gain access to the main menu display. For more information about navigating the
menus, see “Navigation” on page 31.
Note
Default settings shown in bold.
Figure 11.
MFP menu map 1 of 2
C9148-90909
3 Operation 33
4
Maintenance
Cleaning the product. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
General guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Running the cleaning page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Cleaning the ADF delivery guide (clear mylar strip) . . . . . . . . . . . . 37
User-replaceable parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Replacing user-replaceable parts. . . . . . . . . . . . . . . . . . . . . . . . . . 39
Updating product firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Downloading a remote firmware update. . . . . . . . . . . . . . . . . . . . . 41
Installing the update. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
RFU installation messages . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Windows parallel connection (local printer) . . . . . . . . . . . . . . . 43
Windows parallel connection (network printer) . . . . . . . . . . . . 43
Troubleshooting RFU installation . . . . . . . . . . . . . . . . . . . . . . . . . . 44
RFU installation error messages . . . . . . . . . . . . . . . . . . . . . . . 44
Performing hard-drive disk initialization . . . . . . . . . . . . . . . . . . . . . 45
NVRAM initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Performing automatic Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Performing manual calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Lead adjustment for the ADF . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Center adjustment for the ADF . . . . . . . . . . . . . . . . . . . . . . . . 49
Leading-edge adjustment for the glass . . . . . . . . . . . . . . . . . . 49
Side-edge adjustment for the glass . . . . . . . . . . . . . . . . . . . . . 50
C9148-90909
4 Maintenance 35
Cleaning the product
General guidelines
Perform the following cleaning procedures when you change the print cartridge or when print-
quality problems occur. To minimize problems, keep the product free from dust and debris.
WARNING!
CAUTION
Turn the main power-switch off and unplug the MFP power cord before you disconnect any cables
or accessories, and before you perform preventative maintenance or cleaning. Failure to follow
this warning can result in serious product damage or personal injury.
While cleaning the product, do not to touch the transfer roller (the black rubber roller located
underneath the print cartridge). Skin oils on the roller can affect print quality.
Table 6. General cleaning guidelines
Part
Cleaning interval
Cloth
Solvent
Covers
Clean when visibly dirty.
Soft, tight weave; lint-free.
Water (add a mild detergent if
desired). See caution below.
Control panel
ADF rollers
Clean when dusty or when
fingerprints build up.
Soft, tight weave; lint-free.
Soft, tight weave; lint-free.
Water. See caution below.
Clean if the user is experiencing
misfeeds, or multipage feeds, or if
documents are skewing when
traveling through the ADF.
Water. See caution below.
Glass
Clean when visibly dirty or if the
user is experiencing poor copy
quality such as blurriness or
streaking.
Soft, tight weave; lint-free.
Ammonia-based cleaner or
water. See caution below.
Whiteboard cover (white vinyl Clean when visibly dirty.
backing located on the bottom
of the ADF cover)
Soft, tight weave; lint-free.
Soft, tight weave; lint-free.
Ammonia-based cleaner or
water. See caution below.
Clear mylar sheet (ADF
delivery guide)
Clean when visibly dirty or if the
user is experiencing poor copy
quality such as blurriness or
streaking.
Water. See caution below.
CAUTION
To prevent damage, do not pour or spray cleaning solvents directly onto MFP components. Spray
water or cleaning solvent onto a cloth and wipe down components that need cleaning. Because
some MFP components should never be exposed to ammonia fumes, use ammonia-based
cleaners sparingly and only where indicated.
36 Maintenance
C9148-90909
Running the cleaning page
Run the cleaning page to keep the fuser free of toner and paper particles. Accumulation of toner
and particles can cause specks to appear on the front-side or back-side of your jobs. It is
recommended that you either use the cleaning page every time you replace the print cartridge or
that you establish an automatic cleaning schedule.
You can run a cleaning page in two ways:
●
●
automatically at an interval that you establish
manually as needed from the control panel
For information about these procedures, see the HP LaserJet 4100 series printer service
manual.
1
2
3
Access the Configure Devicemenu. See “Menus” on page 32.
Select Print Quality.
Select Create Cleaning Pageand follow the instruction on the page.
Cleaning the ADF delivery guide (clear mylar strip)
1
2
Raise the ADF unit.
delivery guide.
Figure 13.
Open the delivery-guide cover
Remove the clear, plastic sheet (callout 1).
3
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4 Maintenance 37
1
Figure 14.
Remove the clear plastic sheet
4
5
6
Use a clean, soft, dry cloth to wipe the surface of the clear plastic sheet (do not use an
ammonia based cleaner.
Reinstall the clear, plastic sheet by sliding its leading edge under the gray ribbed guide
(callout 2), which is located under the white padded sheet.
Align the holes in the sheet with the small plastic spindles (callout 3) in the delivery guide.
Press the clear, plastic sheet down onto the spindles.
3
2
Figure 15.
Note
Replace the clear, plastic sheet
Make sure that the free end of the clear, plastic sheet (part number RB2-8793-000CN) is tucked
behind the gray ribbed guide and the white padded sheet.
7
8
Close the delivery-guide cover. The cover is properly closed when you hear the delivery-
guide cover plastic handles click into place.
Wipe the outside surface of the delivery guide with the cloth.
38 Maintenance
C9148-90909
User-replaceable parts
Replacing user-replaceable parts
To ensure that the product maintains optimal performance, replace certain parts when the
Perform Printer Maintenancemessage appears on the product control-panel display.
The maintenance message appears every 200,000 pages (default setting). To check the number
of pages the product has printed, either print a configuration page or a supplies status page. See
“Evaluate the information pages” on page 130.
Hint
To order a print-unit maintenance kit, see the HP LaserJet 4100 series printer service manual.
Note
Unless they are damaged, the ADF pickup roller, separation roller, and separation pad should not
need to be replaced.
Table 7. User-replaceable parts
MFP Item
Procedure
Interval
ADF unit
See “ADF unit” on page 78.
User replaceable. As
required.
ADF input tray
See “ADF input tray” on page 73.
User replaceable. As
required.
ADF delivery guide
(clear mylar strip)
See the removal step in “Cleaning the
ADF delivery guide (clear mylar strip)” on required.
User replaceable. As
page 37.
ADF pickup roller
See “ADF pickup roller” on page 74.
User replaceable. As
required.
ADF separation roller
ADF separation pad
required.
See “ADF separation pad” on page 77.
User replaceable. As
required.
ADF separation assembly
compression spring
See “ADF separation pad” on page 77
and “ADF unit (2 of 2)” on page 160.
User replaceable. As
required.
ADF pick/feed cover
See “ADF separation pad” on page 77
and “ADF unit (2 of 2)” on page 160.
User replaceable. As
required.
ADF delivery guide holder (clear See the step in “Cleaning the ADF
User replaceable. As
required.
mylar sheet holder)
delivery guide (clear mylar strip)” on
page 37 and “ADF unit (1 of 2)” on
page 158.
ADF face-up bin handle
5GB hard disk drive
See “Covers” on page 148.
User replaceable. As
required.
To locate the hard drive, see “Back view” User replaceable. As
on page 21. required.
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4 Maintenance 39
Table 7. User-replaceable parts (continued)
MFP Item
Procedure
Interval
HP JetDirect network card
To locate the HP JetDirect network card, User replaceable. As
see “Back view” on page 21. required.
Memory DIMM
Firmware DIMM
Power jumper cable
Print cartridge
To locate the memory DIMM, see “Copy User replaceable. As
processor board” on page 57. required.
To locate the memory DIMM, see “Copy User replaceable. As
processor board” on page 57.
required.
To locate the power jumper cable, see
“Back view” on page 21.
See the HP LaserJet 4100 series printer User replaceable. As
service manual.
required.
About every 10,000 pages
for print cartridge part
number C8061X.
About every 6000 pages for
print cartridge part number
C8061A.
Table 8. Print-unit maintenance kit parts
MFP Item
Procedure
Interval
Print-unit transfer roller
See the HP LaserJet 4100 series printer User replaceable. See
service manual.
“Expected life of
components” in the
HP LaserJet 4100 series
printer service manual.
Print-unit feed rollers
Print-unit separation pad
Print-unit fuser
See the HP LaserJet 4100 series printer User replaceable. See
service manual.
“Expected life of
components” in the
HP LaserJet 4100 series
printer service manual.
See the HP LaserJet 4100 series printer User replaceable. See
service manual.
“Expected life of
components” in the
HP LaserJet 4100 series
printer service manual.
See the HP LaserJet 4100 series printer User replaceable. See
service manual.
“Expected life of
components” in the
HP LaserJet 4100 series
printer service manual.
40 Maintenance
C9148-90909
Updating product firmware
Downloading a remote firmware update
The HP LaserJet 4100mfp product supports remote firmware updates (RFUs). The update is
downloaded from the website http://www.hp.com/go/lj4100_firmware (downloading a firmware
update is similar to downloading printing-system software and printer drivers).
This website also features an “E-mail me when new software is available” link. This feature
notifies you by e-mail when a new firmware update version is available for the MFP. If you used
HP WebReg to register your product, you are automatically sent an e-mail notification when a
new firmware update version is available for the MFP.
Hint
The RFU file on the website is a self-extracting .EXE file. Detailed instructions about how to
download the RFU file can be found at the website http://www.hp.com/go/lj4100_firmware.
The RFU process consists of three steps:
●
Determine the version of firmware currently installed (print a configuration page; see
“Configuration page” on page 130). Look for the version information in the device information
section of the configuration page.
●
●
Go to the website http://www.hp.com/go/lj4100_firmware website and download the update.
Install the update.
Note
For more information about remote firmware updates, contact your HP Customer Care Center
and ask for a software technical reference sheet (see “Support” on page 144).
Installing the update
CAUTION
Note
If a firmware update involves a change in the format on nonvolatile random-access memory
(NVRAM), any user-set settings (for example, configure device settings) revert to default settings.
Before installing an updated version of the firmware, print any information pages required to reset
user defined settings. See “Evaluate the information pages” on page 130.
To install a firmware update on a computer using the UNIX operating system, use any method
that delivers the .RFU file to the printer. For example, $cp/home/yourmachine/FILENAME/dev/
parallel where /home/yourmachine/FILENAME with substitutions for the locations that contain the
location of the .RFU file.
RFU installation messages
During normal RFU installation the following three messages appear on the control-panel
display.
● Recieving Upgrade
• This message appears from the time the printer recognizes the beginning of a .RFU file
being sent until the time the printer verifies the validity and integrity of the .RFU file.
● Performing Upgrading For Help Press?
• This message appears while the printer is reprogramming the DIMM with the .RFU file
information.
● Wait For Printer To Reinitialize
• This message appears from the time the printer finishes reprogramming the DIMM until
the printer re-initializes.
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4 Maintenance 41
Using HP Web JetAdmin (single update)
Note
This procedure requires Web JetAdmin version 6.1 or later. Download the update from the website
http://www.hp.com/go/lj4100_firmware and followthe stepsbelowto update asingle MFPproduct.
1
2
Start the HP Web JetAdmin program.
Enter the Internet protocol (IP) address or IP hostname of the printer in the QUICK DEVICE
FIND FIELD, and click GO. The printer Status window appears.
3
4
5
Click the right arrow on the toolbar to display the UPDATE button. Click the UPDATE button.
When prompted for the type of update, click UPDATE PRINTERS, and then click CONTINUE.
Under UPLOAD NEW FIRMWARE IMAGE: click BROWSE to locate the .RFU file you downloaded
from the website http://www.hp.com/go/lj4100_firmware.
6
Click UPLOAD to move the .RFU file from your hard drive to the HP Web JetAdmin server.
Refresh the browser.
7
8
Select the .RFU file from the SELECT NEW FIRMWARE VERSION: drop-down menu.
Click UPDATE FIRMWARE. HP Web JetAdmin sends the selected.RFU file to the printer.
Using HP Web JetAdmin (multiple or unattended update)
Note
This procedure requires Web JetAdmin version 6.1 or later. Download the update from the website
http://www.hp.com/go/lj4100_firmware and follow the steps below to update multiple MFP
products or perform an unattended installation.
1
2
Start the HP Web JetAdmin program.
Create a device group. One way to do this is:
• Click DEVICES on the 1. CHOOSE: drop-down menu.
• Click DEVICE MODEL from the 2. FILTER: drop-down menu.
• In the 3. CRITERIA (OPTIONAL): field, type your MFP model number (for example, 4100)
• Click GO.
3
In the DEVICE LIST, select the printers you want to include in the group and click CREATE
GROUP.
4
5
6
7
8
When prompted, type a name for the new device group, and then click OK.
Click UPDATE.
When prompted for the type of update, click UPDATE PRINTERS, and then click CONTINUE.
From the list of HP printers, select the printers to be updated or click SELECT ALL.
Click UPDATE FIRMWARE. HP Web JetAdmin sends the selected .RFU file to the selected
printers.
42 Maintenance
C9148-90909
Windows parallel connection (local printer)
Note
Hint
Download the update from the website http://www.hp.com/go/lj4100_firmware and follow the
steps below to update the firmware on a non-shared local printer.
The LaserJet 4100mfp series uses a type-B parallel cable to connect to a computer’s LPT1 port.
1
2
Open a MS-DOS command window.
Type copy /b path\filename portname at the command prompt.
• path is the location the .RFU file was downloaded to
• filename is the name of the .RFU file downloaded from the website
• portname is the appropriate printer port (for example, LPT1)
3
Press the computer ENTER key. The .RFU file is sent to the printer.
Windows parallel connection (network printer)
Note
Download the update from the website http://www.hp.com/go/lj4100_firmware and follow the
steps below to update the firmware on a network printer.
1
2
Open a MS-DOS command window.
Type copy /b path\filename\sharename\printername at the command prompt.
• path is the location the .RFU file was downloaded to
• filename is the name of the .RFU file downloaded from the website
• sharename is the name of the computer from which the printer is shared (host computer)
• printername is the printer share name
3
Press the computer’s ENTER key. The .RFU file is sent to the printer.
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4 Maintenance 43
Troubleshooting RFU installation
RFU installation error messages
The following messages can appear on the control-panel display if the installation is interrupted
for some reason. Turn the MFP power off, and then back on again. Attempt the RFU installation
again.
Hint
If the update is not successful but an error message does not appear on the control-panel display
check the event log for RFU error codes. See “Firmware-update event-log errors” on page 119.
● Job Canceled From Printer Control Panel
• No update occurred. Turn the MFP power off, and then back on again. Attempt the RFU
installation again.
● Break In I/o Stream During Send (for example the parallel cable was removed)
• No update occurred. Turn the MFP power off, and then back on again. Attempt the RFU
installation again.
● Power Cycle Occurred During Recieving Upgrade
• No update occurred. Turn the MFP power off, and then back on again. Attempt the RFU
installation again.
● Power Cycle Occurred During Upgrading Printer
• No update occurred. Turn the MFP power off, and then back on again. Attempt the RFU
installation again.
● Power Cycle Occurred During Wait For Printer To Reinitialize
• Update was completed (no action required).
● .RFU File Is Corrupt
• The printer recognizes that the RFU file is damaged (corrupted) and rejects the update.
Download a new RFU file from the website http://www.hp.com/go/lj4100_firmware. Turn
the MFP power off, and then back on again. Attempt the RFU installation again.
● Wrong Printer Model Contained In The .RFU File
• The printer recognizes that the RFU file is not correct for installation to the intended MFP
product and rejects the update. Download the correct RFU file from the website http://
www.hp.com/go/lj4100_firmware. Turn the MFP power off, and then back on again.
Attempt the RFU installation again.
● Update Was Interrupted
• See the information about the job canceled, break in I/O, and power cycle error messages
in this section.
● Flash Hardware Failure Occurred
• The flash DIMM has failed. Replace the flash DIMM on the formatter.
Hint
The HP LaserJet 4100mfp product contains a backup copy of the latest version of firmware on
the flash DIMM. If a RFU update fails, the MFP uses this backup copy of the firmware to restart.
Then attempt to install the update again. When the MFP starts using the backup copy of the
firmware, some mfp capabilities are not functional (for example, copying or digital sending). A
successful update must be accomplished to fully restore MFP functions.
44 Maintenance
C9148-90909
Performing hard-drive disk initialization
Before performing hard-drive initialization, print the following MFP information pages. Use these
pages to reset any menu settings that the user has changed from factory defaults.
• Configuration page (see “Evaluate the information pages” on page 130).
• File directory page (see “Evaluate the information pages” on page 130).
1
2
Turn the product power off.
Press and hold down the START button. Turn the product power on. Continue to hold down
the START button until the printer initializes and the three control panel LEDs illuminate
continuously. Release the START button.
3
4
5
Press and release the LEFT navigation button. The message INITIALIZE DISKS appears on
the control-panel display.
Press and release the SELECT ( ) button. Two rows of asterisks appear on the control-panel
display.
When the astericks disappear and the message READYappears on the control panel display,
the mfp can process jobs.
Cold Reset
A cold reset clears all data from the printer memory and sets may of the defaults back to the
factory settings.
Before performing hard-drive initialization, print the following MFP information pages. Use these
pages to reset any menu settings that the user has changed from factory defaults.
• Configuration page (see “Evaluate the information pages” on page 130).
• File directory page (see “Evaluate the information pages” on page 130).
1
2
3
4
Turn the product off.
Press and hold down the SELECT ( ) button.
Turn the product on.
Continue to hold down the SELECT ( ) button until all three LEDs are illuminated. Release
the SELECT ( ) button.
5
6
7
Press the UP navigation button twice. The message COLD RESETwill appear on the control
panel display.
Press the SELECT ( ) button once. The message STARTSwill appear on the control panel
display.
When the cold reset is complete, the MFP will restart.
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4 Maintenance 45
NVRAM initialization
NVRAM initialization should be performed immediately after replacing the formatter board. Not
initializing NVRAM might result in print quality defects.
CAUTION
Initializing NVRAM erases several memory settings (for example, page count, printer serial
number, and the event log). This information is permanently lost.
Before performing NVRAM initialization print the following MFP information page. Use this page
to reset any menu settings that the user has changed from factory defaults.
• Configuration page (see “Evaluate the information pages” on page 130).
1
2
Turn the product power off.
Press and hold down the DOWN navigation button. Continue to hold the DOWN button down
until the printer initializes and the three control panel LEDs illuminate continuously. Release
the DOWN button.
3
4
5
Press and release the UP navigation button.
Press and hold down the START button.
Press and release the UP navigation button. Release the START button. The message SKIP
DISK LOAD appears on the control panel display.
6
Press the DOWN navigation button until the message NVRAM INITappears on the control
panel display.
7
8
Press the SELECT ( ) button. The NVRAM initialization process will begin.
When completed, the printer will initialize and the message READYwill appear on the control
panel display. The MFP is ready to process jobs.
46 Maintenance
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Calibration
Performing automatic Calibration
The MFP can be automatically calibrated to register scanned images correctly. When CALIBRATE
SCANNER is selected from the diagnostic menu, the MFP prints a calibration target page.
Messages appear on the control panel with instructions about automatically calibrating the MFP.
1
2
3
4
5
Press the MENU button.
Select DIAGNOSTICS.
Select CALIBRATE SCANNER.
Select CALIBRATE.
The message To Print Target Page On Paper Size: Letter. Press Start. To Quit,
Press Stopappears on the control-panel display. Press the START button to print the
calibration target page. While this page is printing, the message Target Page PrintingTo
Quit, Press Stop appears on the control-panel display.
Note
The paper size displayed in the message is the cold-reset paper size (either letter or A4).
6
When the message Load Target Page Face Up In Adf Clear Flatbed And Press Start
To Quit, Press Stopappears, place the target page in the ADF and press the START
button.
7
8
The target page is moved through the ADF paper path and automatic calibration begins. The
message calibration running do not raise coverappears on the control-panel display.
When calibration is over, the MFP returns to the ready mode (the message READYappears
on the control-panel display) and can process print and scan jobs.
Figure 16.
Sample calibration target page
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4 Maintenance 47
Performing manual calibration
Manual calibration provides precise control of image placement. Vertical and horizontal image
registry for both the ADF and the glass can be set individually. For example, changing the
leading-edge adjustment for the ADF does not effect the leading-edge adjustment of the glass.
Note
Hint
Manual calibration increment values are in pixels (600 pixels-per-inch). All values are positive
numbers. The center adjustment value 2670 represents an imaginary center line through the ADF.
It may not be exactly centered due to mechanical tolerances between MFP units
Before attempting to manually calibrate the MFP, first try the automatically calibrating procedure
(see “Performing automatic Calibration” on page 47).
0,0
ADF lead adjustment
0
Glass leading-edge adjustment
255
255
ADF center adjustment
2870
2470
ADF
ADF
Control panel
Control panel
Figure 17.
Hint
Manual calibration registration lines
Lead adjustment for the ADF
It might be helpful to reset the product settings to factory defaults before attempting manual
calibration. Be sure to print a configuration page before doing a setting reset so that any user-
defined settings can be restored (see “Configuration page” on page 130).
1
Press the MENU button.
Select DIAGNOSTICS.
2
3
4
5
Select CALIBRATE SCANNER.
Select LEAD ADJUSTMENT.
The message Lead Adjustment ### Range 0-255appears on the control-panel display. Use
the numeric keypad to type a value for the leading-edge adjustment.
Hint
Entering a lower value than current setting moves the image away from the leading edge (toward
the bottom of the page). Entering a higher value than the current setting moves the image toward
the leading edge (toward the top of the page).
6
Press the SELECT ( ) button to save the setting.
7
Use the ADF to scan a source document (use the calibration target page if you have already
automatically calibrated the MFP). Verify that the leading edge is correctly positioned on the
output copy.
48 Maintenance
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Center adjustment for the ADF
Hint
It might be helpful to reset the product settings to factory defaults before attempting manual
calibration. Be sure to print a configuration page before doing a setting reset so that any user-
defined settings can be restored (see “Configuration page” on page 130).
1
2
3
4
5
Press the MENU button.
Select DIAGNOSTICS.
Select CALIBRATE SCANNER.
Select CENTER ADJUSTMENT.
The message Center Adjustment #### RANGE 2470-2870appears on the control-panel
display. Use the numeric keypad to type a value for the center adjustment.
Hint
Entering a lower value than current setting moves the image away from the left edge (toward the
right side of the page). Entering a higher value than the current setting moves the image toward
the left edge of the page.
6
Press the SELECT ( ) button to save the setting.
7
Use the ADF to scan a source document (use the calibration target page if you have already
automatically calibrated the MFP). Verify that the image is correctly positioned on the output
copy.
Leading-edge adjustment for the glass
Hint
It might be helpful to reset the product settings to factory defaults before attempting manual
calibration. Be sure to print a configuration page before doing a setting reset so that any user-
defined settings can be restored (see “Configuration page” on page 130).
1
2
3
4
5
Press the MENU button.
Select DIAGNOSTICS.
Select CALIBRATE SCANNER.
Select LEAD ADJUSTMENT GLASS.
The message Leading Edge Glass ### Range 0-255appears on the control-panel display.
Use the numeric keypad to type a value for the leading-edge adjustment.
Hint
Entering a lower value than current setting moves the image away from the leading edge of the
page (towards the bottom of the page). Entering a higher value than the current setting moves
the image toward the leading edge (toward the top of the page).
6
Press the SELECT ( ) button to save the setting.
7
Use the glass to scan a source document (use the calibration target page if you have already
automatically calibrated the MFP). Verify that the image is correctly positioned on the output
copy.
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4 Maintenance 49
Side-edge adjustment for the glass
Hint
It might be helpful to reset the product settings to factory defaults before attempting manual
calibration. Be sure to print a configuration page before doing a setting reset so that any user-
defined settings can be restored (see “Configuration page” on page 130).
1
2
3
4
5
Press the MENU button.
Select DIAGNOSTICS.
Select CALIBRATE SCANNER.
Select SIDE EDGE ADJUSTMENT GLASS.
The message Side Edge Glass ### Range 0-255appears on the control-panel display. Use
the numeric keypad to type a value for the side-edge adjustment.
Hint
Entering a lower value than current setting moves the image away from the left edge (toward the
right side of the page). Entering a higher value than the current setting moves the image toward
the left edge of the page.
6
Press the SELECT ( ) button to save the setting.
7
Use the glass to scan a source document (use the calibration target page if you have already
automatically calibrated the MFP). Verify that the image is correctly positioned on the output
copy
50 Maintenance
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5
Theory of operation
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Document transportation process. . . . . . . . . . . . . . . . . . . . . . . . . . 52
Document exposure system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Light-conversion process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
General descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Scan-unit components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
ADF components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Copy processor board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
CPB terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Scanner controller board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
ADF motor circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Optical-unit motor circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Scan-unit intake-fan motor circuit. . . . . . . . . . . . . . . . . . . . . . . 61
Scanner controller board connectors . . . . . . . . . . . . . . . . . . . . 62
Intermediate PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Overcurrent and overvoltage protection. . . . . . . . . . . . . . . . . . 63
Power-supply block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Optical unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Inverter PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Scanning lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
CCD driver PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
ADF document-feed system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
ADF cover sensor (PS10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Document-detect sensor (PS2) . . . . . . . . . . . . . . . . . . . . . . . . 68
Leading-edge sensor (PS1) . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
ADF motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Document pickup process . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Document jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Scan-unit intake fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
C9148-90909
5 Theory of operation 51
Introduction
This chapter presents an overview of the relationships between major components in the MFP. It
also provides a general description of the following:
●
mechanical systems (for example, the flatbed intake fan)
electronic circuits (for example, the scanner controller circuit)
sensors (for example, the document-detect sensor)
●
●
Overview
Scanning a document consists of three main processes. First, the document is transported
through the ADF or manually placed on the glass. Second, the document is illuminated and the
light is captured (the document-exposure process). Third, the captured light is converted to a
digital signal and sent to the base printer for output (image processing).
When the copy processor board (CPB) receives a scan command from the control panel, it
sends the command to the scanner controller board, which initiates and controls the scanning
process.
These main components are used in the scanning process.
●
●
●
●
●
scanner controller board (controls the scanning process and communication with the CPB)
automatic document feeder (ADF) (transports the source document)
optical unit (holds the scanning lamp and charged couple device [CCD])
scanning lamp (exposes the document)
charged-couple device (CCD) driver PCB (converts reflected light to digital RGB signals for
final output)
Document transportation process
The ADF receives a signal from the scanner control PCB and begins to transport the document.
A sensor in the ADF detects the document in the input tray. The ADF picks up the document.
Then, the document travels through the ADF toward the flatbed. A second sensor in the ADF
confirms that the document was successfully transported through the ADF. After the scanning
process the document is transported to the ADF output.
Document exposure system
●
The source document is loaded through the ADF.
After receiving the scan command from the copy processor board, the scanner controller
board sends a signal to the scanning lamp in the optical unit. The lamp illuminates the
document as the ADF passes the document past the optical unit (the optical unit does not
move). A calibration strip mounted under the glass allows automatic document registration
during the exposer process. The light is reflected from the scanning plate and is sent (by way
of three mirrors and a lens) to the CCD driver PCB for image processing. The source
document is deposited in the ADF output.
●
The source document is manually placed on the glass.
After receiving the scan command from the copy processor board, the scanner controller
sends a signal to the scanning lamp. The lamp illuminates the document as the optical-unit
motor moves the optical unit down the length of the document. The light is reflected from the
scanning plate and is sent (by way of three mirrors and a lens) to the CCD driver PCB for
image processing. When the scanning process is complete, the optical unit returns to its
home position.
52 Theory of operation
C9148-90909
Light-conversion process
When the charged couple device receives the reflected light, it photo-electrically converts the
light to three analog signals (red-green-blue, or RGB). These three signals pass through an
analog-to-digital converter, and the resulting digital signals are sent to the scanner controller
board. The scanner controller board sends the digital signals to the copy processor board, which
initiates output through the base printer.
Note
If the source document is manually placed on the glass, the scanning process is the same, except
for document transportation.
C9148-90909
5 Theory of operation 53
General descriptions
This section describes the individual MFP components and their roles in the scanning process.
Figure 18 illustrates the relationship between the MFP components. Figure 19 illustrates the
flatbed-assembly component locations. Figure 20 illustrates the ADF-unit component locations.
The following components are identified:
●
scanner controller board
• CPU
●
●
●
●
power supply
flatbed intake fan
intermediate PCB
• fan-motor drive circuit
• ADF drive motor circuit
• optical-unit motor circuit
ADF cover-open sensor
(PS10)
●
ADF unit
• optical-unit home-position
sensor (PI1201)
(PS2)
●
optical unit
• document leading-edge
• scanner motor
• inverter PCB
• scanning lamp
• CCD driver PCB
sensor (PS1)
• ADF drive motor
• pickup solenoid
The block diagram below illustrates the relationship among the MFP components.
Figure 18.
MFP block diagram
54 Theory of operation
C9148-90909
Scan-unit components
1
2
3
5
4
11
10
9
8
7
6
Figure 19.
Scan-unit components
1
2
3
intake fan
9
optical-unit assembly
(includes the CCD driver
PCB)
inverter control PCB
ADF door-open sensor
(PS10)
10 scanner lamp
11 optical-unit lock
4
5
optical-unit drive-belt
optical-unit motor (under the
shield)
6
power supply (under the
shield)
7
8
control-panel connector
scanner controller board
(under the shield)
C9148-90909
5 Theory of operation 55
ADF components
2
1
8
3
4
7
9
5
6
Figure 20.
ADF-unit components
1
2
3
4
5
ADF separation roller
ADF pickup roller
ADF pickup solenoid (SL1)
ADF drive motor
ADF-to-scanner controller
connector
6
7
document-detect sensor
flag(PS2)
leading-edge sensor (inside
the ADF; PS1)
8
9
ADF separation pad
ADF sliding media guides
56 Theory of operation
C9148-90909
Copy processor board
This section describes the operation of the copy processor board (CPB) during normal operation
of the MFP. This description is more detailed than the CPB troubleshooting chapter in this
manual.
The CPB is the link between the formatter in the print unit and the scanner controller board in the
scan unit. Control signals from the formatter are sent to the CPB. The CPB then sends these
control signals to the scanner controller board. After the scanner controller board completes the
scanning process, the scanned data is sent to the copy processor board. The copy processor
board processes the image and sends the image data to the formatter.
CPB terminology
●
●
ASIC (application specific integrated circuit): is the system controller that provides the
peripheral component interconnect (PCI), DIMM, and processor interface. The ASIC
performs monochrome data compression.
Firmware code DIMM (dual inline memory module): contains the firmware that controls the
system.
●
●
Digital signal processor (DSP): runs the image processing algorithms.
FPGA (field programmable gate array): provides an interface to the scanner, SRAM, DSP,
and PCI bridge and provides front-end image processing.
●
IEEE 1394 phy. (physical layer): provides an interface from the CPB to the formatter (high-
speed copy connect cable)
●
●
IEEE 1394 protocol chip: connects the PCI bus to the IEEE 1394 phy.
MIPS (millions of instructions per second) processor: is the system processor that runs the
firmware.
●
●
PCI (peripheral component interconnect) bridge: connects the PCI bus to the FPGA.
RAM (random access memory) DIMM: provides main system memory and temporary
storage for image data and firmware variables.
●
●
RAM for DSP: provides temporary storage for image processing in the DSP.
SRAM (static RAM): is the memory used for aligning the image data from the scanner.
MIPS
SRAM
IEEE 1394 protocol chip
FPGA
DSP RAM
processor
DSP
ASIC
16-MB
DIMM
Firmware
code
DIMM
Hard
code for
FPGA
PCI
bridge
IEEE 1394 phy.
Figure 21.
Copy processor board components
C9148-90909
5 Theory of operation 57
The CPB controls the following scanning-process control signals:
●
ADF unit and scan unit operation
• directs the scanner controller board about when to scan
• directs the scanner controller board about how to scan
• directs the scanner controller board about when to activate motors
• directs the scanner about when to turn the scanning lamp on and off
Image processing
●
• color alignment
• resolution conversion
• image sharpening
• moire removal
• image scaling
• shifting of data strips (reconstructing separately processed image data before CPB
communication to the formatter)
• RGB conversion for CPB communication
• CPB communication over the high-speed copy connect cable to the formatter in one of the
following formats:
•
•
•
Hardware Ready Bits (HRB) (fastpath) communication with the hard disk on the formatter
PCL-XL (N-up, rotation, book mode) communication with the hard disk on the formatter
JPEG compression (when sending data digitally) communication with the hard disk on the formatter
• data compression before sending to the formatter over the high-speed copy connect cable
Typical scanning-process flow
1
2
The original document is placed on the glass or in the ADF.
The user selects job preferences by using the control-panel buttons and keys. The user
presses the START button. Job preferences are sent to the formatter.
3
Some job preferences are held and then processed later (for example, N-up) by the
formatter. Others are sent to the CPB.
4
5
6
7
8
9
The CPB sends control signals to the scanner controller board. The document is scanned.
The scanner controller board sends scanned-image data back to the CPB.
The CPB processes the image.
The CPB sends the image data to the formatter.
The formatter further processes the image data (if required).
The image data is then either printed or sent digitally, depending on what the user specified
at the beginning of the process.
58 Theory of operation
C9148-90909
Copy processor board LEDs
The CPB has four light-emitting diodes (LEDs) that can be viewed when you face the back of the
MFP (callout 1). These LEDs illuminate in specific patterns depending on the CPB status during
initialization (initialization occurs when power to the MFP is turned on). After initialization, the
LEDs can be used to troubleshoot the CPB (see “Troubleshooting with the copy processor board”
on page 124).The table in this section describes the LED pattern sequences during the first and
second stage of CPB initialization.
Hint
The LEDs can be difficult to see through the holes provided in the CPB faceplate (callout 1) in a
high-light environment. It might be necessary to turn off some lights or remove the faceplate to
see the LEDs.
The LED patterns an HP LaserJet 4100/4101mfp displays are the opposite of those on the
HP LaserJet 9000mfp because of how the CPBs are mounted. The CPB is mounted upside down
in the HP LaserJet 9000mfp.
1
Figure 22.
Copy processor board LEDs
Table 9. Copy processor board LEDs (initialization sequence)
LED pattern
CPB status
First stage of CPB initialization
ON* ON* ON ON
●
●
●
●
CPB flash DIMM detected
CPB RAM DIMM detected
*LEDs might flash
before coming to a solid
illuminated state
CPB processor is working
CPB has communication with the ASIC
Note
If CPB initialization stops and the LEDs stay in the continuously illuminated
state, a CPB failure has occurred (for example, a memory DIMM is not
present orfully seated). To troubleshoot aCPB failure, see “Troubleshooting
with the copy processor board” on page 124.
C9148-90909
5 Theory of operation 59
Table 9. Copy processor board LEDs (initialization sequence)
LED pattern
CPB status
ON ON OFF ON
●
Communication is established between the MIPS processor and the PCI
bridge.
OFF ON OFF ON
OFF OFF OFF ON
OFF OFF OFF OFF
●
●
●
Communication is established between the MIPS processor and the FPGA.
The FPGA SRAM is checked.
Communication is established between the MIPS processor, the DSP, and
the DSP RAM.
Second stage of CPB initialization
LED pattern
CPB status
OFF OFF OFF ON
●
●
●
The rightmost LED illuminates and stays on when the connection to the SSA
(the portion of the firmware tat runs in the print engines RAM) is established.
OFF OFF ON ON
The LED second from the right illuminates when communication occurs
between the CPB and the scan engine.
ON* OFF ON ON
*Flashing after a one to
two second solid
The leftmost LED illuminates to indicate the CPB has booted properly. When
this LED begins to flash (referred to as the CPB heartbeat), the CPB is
functioning normally and the MFP is ready to process jobs.
illumination state
Hint
The CPB remains in this state even when the MFP is in PowerSave mode.
60 Theory of operation
C9148-90909
Scanner controller board
The scanner controller board controls the operation of flatbed and ADF components used in the
following scanning processes: document transportation, document exposure, and imaging.
When the copy processor board sends the scan commands to the scanner controller board, the
scanner controller board sends signals to the motors, solenoids, scanning lamp, and CCD driver
PCB.
The scanner controller board controls the operation of the following components:
●
ADF document transportation
• ADF sensors (door-open, document-detect, and leading-edge sensors)
• ADF solenoid
• ADF drive motor
●
document exposure
• optical-unit home-position sensor
• scanning lamp
• scanning motor
●
●
imaging process
• CCD driver PCB (converts reflected light to a digital RGB signal)
• copy processor communication
flatbed intake fan (off in PowerSave mode, half-speed when idle; full-speed when scanning)
ADF motor circuit
The ADF motor circuit controls the operation of the ADF motor. The ADF motor is a +24 vdc
stepping motor. It rotates in a counterclockwise direction. The ADF motor is not fault-protected.
Note
When a fault-protected motor circuit fails, an error message appears on the control panel. The
ADF motor circuit is not fault protected. No error message appears on the control-panel display
if this circuit fails.
Optical-unit motor circuit
The optical unit motor circuit controls the optical unit motor and the movement of the unit. The
optical unit motor is a +24 vdc stepping motor. It rotates in both a clockwise and
counterclockwise direction. If the optical unit motor fails, the message 30.1.17 SCAN FAILURE
appears on the control-panel display.
Scan-unit intake-fan motor circuit
The fan motor circuit controls the fan speed. The fan is off in PowerSave mode, it rotates at half-
speed when the product is idle, and at full-speed during the scanning process, when a document
is detected in the ADF, or when a control-panel button or key is pushed. If the fan motor fails, the
message 30.01.06 Scan Failure appears on the control panel-display.
C9148-90909
5 Theory of operation 61
Scanner controller board connectors
J 1209
J1210
PI1201
J1208
Scanner controller
with the shield on
J1201
J1207
J1206
J1205
J1202
J1203
Figure 23.
Scanner controller board connectors (shield off)
Table 10. Scanner controller board connectors
Connector Description
Remarks
J1201
J1202
J1203
J1205
Power-supply connector
10-pin connector. To gain access to this connector,
remove the glass. See “Glass” on page 92.
Inverter PCB connector
Flatbed intake fan
ADF connector
5-pin connector. To gain access to this connector,
remove the glass. See “Glass” on page 92.
3-pin connector. To gain access to this connector,
remove the glass. See “Glass” on page 92.
15-pin connector. Verify that the connector’s locking
thumb screws are tight. This connector can be removed
accessed without removing any other MFP components.
J1206
J1207
J1208
J1209
ADF door-open sensor (PS10)
Optical-unit drive motor
CCD connector
3-pin connector. To gain access to this connector,
remove the glass. See “Glass” on page 92.
4-pin connector. To gain access to this connector,
remove the glass. See “Glass” on page 92.
Flat ribbon cable. To gain access to this cable, remove
the glass. See “Glass” on page 92.
Intermediate PCB
This connector connects the copy processor board to the
scanner controller board. It cannot be disconnected
independently of removing the scanner controller board.
J1210
Control panel
5-pin connector. To gain access to this connector,
remove the glass. See “Glass” on page 92.
PI1201
Optical-unit home-position sensor (PI1201) This sensor is soldered to the scanner controller board.
To gain access to this sensor, remove the glass. See
“Glass” on page 92.
62 Theory of operation
C9148-90909
Intermediate PCB
The intermediate PCB connects the copy processor board and the ADF to the scanner controller
board.
Power supply
The power supply converts ac power from the source inlet (power cord) to low-voltage dc power.
Low-voltage power is supplied to various flatbed and ADF components. Low-voltage power from
the power supply consists of +3.3 vdc, +5 vdc, +12 vdc, and +24 vdc voltages.
Table 11. Low-voltage components
Voltage
+3.3 vdc
Components
scanner controller board
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
scanner controller-to-engine controller connector
scanner controller-to-copy processor board intermediate PCB
CCD drive circuit
document-detect sensor
leading-edge sensor
optical unit home-position sensor
scanner controller board
scanner controller-to-video controller connector
CCD drive circuit
+5 vdc
+12 vdc
+24 vdc
scanner controller board
CCD drive circuit
scanner controller board
document-pickup solenoid
ADF motor
optical-unit motor
flatbed intake fan
inverter circuit
Overcurrent and overvoltage protection
The power supply uses overcurrent and overvoltage protection. If a short-circuit on the load side
(flatbed and ADF component side) causes an excessive current or voltage draw, the overcurrent
or overvoltage protection function interrupts the power-supply output. If this happens, turn the
printer off, and then identify and repair the malfunctioning component.
Note
The power supply must remain off for at least two minutes for the overcurrent and overvoltage
functions to reset.
A fuse (power supply PCB F101) protects against overcurrent coming from the ac source inlet
(power cord).
C9148-90909
5 Theory of operation 63
Optical unit
The optical unit consists of the optical unit chassis, the scanning lamp, the CCD driver PCB, and
the optical-unit motor. When the power is turned on, the scanner controller board activates the
optical-unit motor, and the unit begins to move along the rails. When the optical-unit home
sensor flag (located on the bottom of the unit) aligns with the home-position sensor (located on
the scanner controller board; PI1201), the unit stops in the home position.
Figure 25.
Optical unit block diagram
The scanner controller board illuminates the flatbed lamp after receiving the scan command from
the copy processor board. As the document is exposed to the illumination of the scanning lamp,
the reflected light from the glass is sent by way of three scanning mirrors and a lens to the CCD
driver PCB for image processing. When the scanning process is complete, the optical unit
returns to the home position.
Figure 26.
Scanning process
C9148-90909
5 Theory of operation 65
Inverter PCB
The inverter PCB provides the current and voltage phase the scanning lamp requires.
Scanning lamp
The scanning lamp illuminates the source document, which causes reflected light from the glass
to be directed to the CCD driver PCB for document imaging.
CCD driver PCB
When the CCD driver receives the reflected light from the exposure process, it photo-electrically
converts the light into three analog signals (RGB). These three signals pass through an analog-
to-digital converter, and the resulting digital signals are sent to the scanner controller PCB. The
scanner controller sends the digital signals to the copy processor board for output by the base
printer, which initiates output through the base printer.
Figure 27.
Signal conversion
66 Theory of operation
C9148-90909
ADF document-feed system
Overview
The ADF document-feed system detects the presence of a source document in the document
tray, picks up the document and transports it through the ADF paper path, and then delivers the
source document to the ADF output.
●
The ADF motor rotates counterclockwise, which rotates the feed and delivery rollers. The
document pickup solenoid is activated, causing the pickup and separation rollers to rotate. If
more than one source document is in the ADF input tray, the separation roller and separation
pad clear the multiple-sheet feed, and then the first document is sent into the flatbed
scanning path.
●
●
●
The leading-edge sensor detects the source document in the paper path and then the
scanning lamp illuminates.
The source document is passed through the flatbed scanning path and the image
processing operation (controlled by the CCD driver) begins.
The delivery roller transfers the source document to the ADF output. If more source
documents are in the input tray, the process repeats.
Figure 28.
Hint
Document transport path
To locate these components on the ADF, see “ADF components” on page 56.
C9148-90909
5 Theory of operation 67
ADF cover sensor (PS10)
The ADF door-open sensor (PS10) detects ADF door status (open or closed). If the ADF door is
opened, a FLATBED COVER OPEN message appears on the control-panel display. If the ADF door
is opened during the document transport process, the ADF drive-motor stops and a door-open
message appears on the control panel.
Document-detect sensor (PS2)
The document-detect sensor (PS2) detects the presence of documents when they are placed
into the ADF document input tray.
Leading-edge sensor (PS1)
When a document enters the document transport path, it must pass the leading-edge sensor
(PS1) within a specified amount of time. If it does not, a paper-jam message appears on the
control-panel display.
ADF motor
The ADF motor is controlled by the scanner controller board. When the scanner controller
receives the scan command, the ADF motor rotates counterclockwise, which starts rotation of
the feed and delivery rollers.
Document pickup process
When the document pickup solenoid is activated, the pickup and separations rollers begin to
rotate. If more than one source document is in the pickup tray, the separation roller and
separation pad clear the multiple feed, and then the first document is sent toward the flatbed.
Document jams
The scanner controller board detects a jam by verifying that each document passes the leading-
edge sensor in a specified amount of time. If a document does not pass by the sensor in time,
the scanning operation stops. A document-jam message appears on the control-panel display,
and the user must clear the jam. The scanner controller board can detect two types of jams:
●
Document-delay jam: If the leading-edge sensor does not detect the leading edge of the
document after the document pickup solenoid is activated, the scanner controller initiates a
document-delay jam signal.
●
Document-stationary jam: If the leading-edge sensor does not detect the trailing edge of
the document after it detects that the leading edge has passed, the scanner controller board
initiates a document-stationary jam signal.
Scan-unit intake fan
The intake fan draws fresh air into the flatbed assembly. It is controlled by the fan-drive circuit,
which is located on the scanner controller board. The fan is off in PowerSave mode, it rotates at
half-speed when the product is idle, and at full-speed during the scanning process. The intake
fan motor is fault-protected. If the fan motor fails, the message 30.01.06 Scan Failure appears
on the control-panel display.
CAUTION
The fan must be replaced so that it draws air into the flatbed. Failure to correctly position the fan
can result in damage to MFP components. Verify that the airflow arrow (located under the drive-
belt tension bracket) embossed on the fan housing points into the flatbed. See, “Correctly orient
the intake fan and bracket” on page 107.
68 Theory of operation
C9148-90909
6
Removal and replacement
Removal and replacement strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Required tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Before performing service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
After performing service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Common fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Parts removal order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
User-replaceable parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
ADF input tray. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
ADF pickup roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
ADF separation roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
ADF unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Assemblies and covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Control-panel door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Scan-unit right-side cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Copy processor board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Scan-unit left-side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Intake fan filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Formatter cage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Scan unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Printing-unit top cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Glass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Scanning lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Optical unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
ADF door open sensor (PS10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Optical-unit drive gear/motor assembly . . . . . . . . . . . . . . . . . . . . . 99
Scan-unit power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Inverter PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Scanner controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Intake fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
C9148-90909
6 Removal and replacement 69
Removal and replacement strategy
This chapter documents the removal and replacement of field replaceable units (FRUs) only.
Reinstallation is generally the reverse of removal. Occasionally, notes are included to provide
directions for difficult or critical replacement procedures.
WARNING!
Unplug the power cord from the power outlet (at the wall receptacle) before attempting to service
the product. If this warning is not followed, severe injury can result. Certain functional checks
during troubleshooting must be performed with power supplied to the product. However, the power
supply should be disconnected during removal.
of the print unit does not prevent AC power from going to the scan unit. See “Back view” on
page 21.
CAUTION
The product contains components that are sensitive to electrostatic discharge (ESD). Always
perform service work at an ESD-protected workstation. If an ESD-protected workstation is not
available, discharge body static by grasping the print engine chassis before touching an ESD
sensitive component. Ground the print engine chassis before servicing the product.
Required tools
●
●
●
●
●
#2 Phillips screwdriver with magnetic tip
small flatblade screwdriver
needle-nose pliers
ESD mat (if available)
penlight (optional)
CAUTION
Hint
A PoziDriv screwdriver will damage screw heads on the product. Use a #2 Phillips screwdriver.
To install a self-tapping screw, first turn it counterclockwise to align it with the existing thread
pattern, then carefully turn it clockwise to tighten. Do not overtighten.
Before performing service
●
●
●
If possible, print a configuration page. See “Configuration page” on page 130.
Remove all media from the product.
Unplug the power cord from the wall receptacle. Unplugging the cord from the back of the
print unit does not prevent AC power from going to the scan unit.
●
●
Place the product on an ESD mat, if available. If an ESD-protected workstation is not
available, discharge body static and ground the print engine chassis before servicing the
product.
Remove the print cartridge. See “Checking the print cartridge” on page 137.
After performing service
●
●
●
●
Replace the print cartridge.
Reconnect all cables to the product.
Replace all accessories and reload the media.
Verify that the latest firmware is installed on the product. See “Configuration page” on
page 130.
●
Restore customer configuration settings.
70 Removal and replacement
C9148-90909
Common fasteners
Table 12. Common fasteners found in the MFP
Illustration and description
Black self-tapping Phillips-head screw
Silver self-tapping Phillips-head screw
Machine screw with serrated washer
Short Phillips-head screw with small shoulder
Long Phillips-head screw with large shoulder
Phillips-head machine screw with loose washer
Hint
To order replacement screws,
see table 27 on page 146.
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6 Removal and replacement 71
Parts removal order
Use the following diagram to determine the order in which parts must be removed (scan unit and
ADF units only).
Table 13. Parts-removal tree
ADF input tray
ADF pickup roller
ADF separation roller
ADF separation pad
Control panel door
ADF unit
Glass
Door interlock (PS10)
Inverter PCB
Scanning lamp
scan-unit right-side cover
Copy processor board
scan-unit left-side cover
Optical unit
Optical-unit drive gear/motor
Intake fan
scan-unit power
supply
Intake fan filter
Copy processor board
Formatter cage
Scanner controller
scan unit
Printing-unit top cover
Note
The copy processor board is intentionally listed twice.
72 Removal and replacement
C9148-90909
User-replaceable parts
ADF input tray
1
Open the ADF cover. Gently pry the input-tray hinge pin (located towards the front of the
MFP; callout 1) out of its pivot hole.
CAUTION
The hinge pin can easily be snapped off of the input tray if too much pressure is applied.
1
Figure 29.
Release the ADF input-tray hinge
2
When the hinge pin clears the pivot hole, rotate the input tray away from the MFP (as
indicated by the arrow) and slide the other hinge pin out of its pivot hole. Remove the tray.
Figure 30.
Remove the ADF input tray
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6 Removal and replacement 73
ADF pickup roller
1
2
Open the ADF cover (callout 1).
Pull the plastic tab (callout 2) to release the lower edge of the roller shield.
1
2
Figure 31.
Release the roller shield
3
Release the roller shield from the two small pins (callout 3), and remove it from the product.
3
Figure 32.
Remove the roller shield
74 Removal and replacement
C9148-90909
4
Slide the roller toward the gear end. Gently pry the roller-shaft locking tab (callout 4) away
from the roller. Remove the ADF pickup roller.
4
Figure 33.
Hint
Remove the ADF pickup roller
When replacing the roller, verify that the roller gear and drive gear are properly meshed.
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6 Removal and replacement 75
ADF separation roller
1
2
Open the ADF cover, and remove the roller shield. See “ADF pickup roller” on page 74.
Slide the roller toward the gear end. Gently pry the roller-shaft locking tab (callout 1) away
from the roller. Remove the ADF separation roller.
1
Figure 34.
Hint
Remove the ADF separation roller
When replacing the roller, verify that the roller gear and drive gear are properly meshed.
76 Removal and replacement
C9148-90909
ADF separation pad
1
2
3
4
Open the ADF cover.
Press and release two separation locking tabs (callout 1; shown already released).
Rotate the separation pad until it is perpendicular to the product.
Release the separation-pad arms (callout 2) by gently pressing them toward the ADF cover.
1
2
Figure 35.
Note
Remove the ADF separation pad
When replacing the separation pad, verify that the spring is firmly seated on its pedestal (callout 3).
3
Figure 36.
Replace the ADF separation pad spring
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6 Removal and replacement 77
Assemblies and covers
Control-panel door
1
Open the control-panel door, and remove the print cartridge. Cover the print cartridge to
keep it out of direct light; see the HP LaserJet 4100 series printer service manual for print-
cartridge information.
Figure 39.
Remove the print cartridge
2
3
4
Press the two tabs (callout 1) on the inside of the print-cartridge lever to release it.
Remove one screw (callout 2).
Remove the wire-harness plastic cover (callout 3).
3
1
2
Figure 40.
Remove the control-panel wire-harness cover
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6 Removal and replacement 79
5
Remove one screw (callout 4), and disconnect the top edge of the grounding strip.
4
Figure 41.
Disconnect the control-panel grounding strip
6
7
Disconnect the control-panel-cable connector (callout 5).
Separate the door-support pins (callout 6) to release them.
5
6
Figure 42.
Release the control-panel door-support pins
80 Removal and replacement
C9148-90909
8
Flex the left arm (callout 7) to the right (inward), and move the control-panel door toward the
right side of the product until the arm releases. Slide the control-panel door toward the left,
and remove it from the product.
7
Figure 43.
Note
Remove the control-panel door
Step 9 is essential. The MFP must retain the original serial- and model-number label panel.
WARNING!
The control panel in figure 44 is shown installed in the open position so that the label panel screws
can be easily seen. Remove the control panel and lay it on a flat surface before
removing the label panel to keep from dropping the mounting screws into the print unit.
9
Remove seven screws (callout 8), and remove the panel. Reinstall the label panel on the
replacement control-panel door.
8
Figure 44.
Remove the product serial- and model-number panel
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6 Removal and replacement 81
Scan-unit right-side cover
Note
If a duplex accessory is installed, remove it to access the right-side cover mounting screw.
1
Remove one screw (callout 1) from the plastic tab on the scan-unit right-side cover.
7
Figure 45.
Remove the right-side cover screw
2
Grasp the plastic tab and pull the cover downward and away from the right side of the
product. Lift the cover up to release it, and then remove it from the product.
Figure 46.
Remove the scan-unity right-side cover
82 Removal and replacement
C9148-90909
Copy processor board
1
2
Remove the scan-unit right-side cover. See “Scan-unit right-side cover” on page 82.
Unplug the ADF connector cable (callout 1) and remove two screws (callout 2).
1
Figure 47.
CAUTION
Disconnect the ADF cables
Sliding the CPB out without unplugging the high-speed copy connect cable (callout 3) will damage
the cable connector.
3
Slide the copy processor board (CPB) out of the product approximately 2.5 mm (1 inch), and
disconnect the high-speed copy connect cable (callout 3).
3
Figure 48.
Disconnect the high-speed copy connect cable
Remove the CPB from the product.
4
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6 Removal and replacement 83
Scan-unit left-side cover
Note
If a duplex accessory is installed, remove it to access the right-side cover mounting screw.
1
Remove one screw (callout 1) from the scan-unit left-side cover.
1
Figure 49.
Remove the left-side screw
2
Gently pry the rounded top edge of the cover (callout 2) with a flatblade screwdriver until you
can grasp it.
2
Figure 50.
Gently pry the top edge of the left-side cover
84 Removal and replacement
C9148-90909
Formatter cage
1
2
Grasp the back edge (callout 1) of the formatter-cage cover.
Pull the cover toward the back of the product, and remove it.
1
Figure 53.
Remove the formatter-cage cover
3
4
Remove two screws (callout 2).
Slide the formatter cage toward the back of the product approximately 2.5 mm (1 inch), and
locate the formatter end of the high-speed copy connect cable connector (callout 3).
2
3
Figure 54.
Slide the formatter cage toward the back of the product
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6 Removal and replacement 87
5
6
Twist the formatter away from the right side of the product, and unplug the high-speed copy
connect cable (callout 4).
Remove the formatter cage.
4
Figure 55.
Note
Disconnect the formatter high-speed copy connect cable
When replacing the formatter cage, align the back of the formatter cage with two large guide pins
and then slide it forward
88 Removal and replacement
C9148-90909
Scan unit
1
Remove the following covers and assemblies:
• ADF unit. See “ADF unit” on page 78.
• scan-unit right-side and left-side covers. See “Scan-unit right-side cover” on page 82
through “Scan-unit left-side cover” on page 84.
• formatter cage. See “Formatter cage” on page 87.
2
Secure the optical unit by sliding the lock to the closed position.
Figure 56.
Secure the optical unit
3
Remove two screws from the CPB and slide the CPB out of the product approximately
2.5 mm (1 inch). It is not necessary to remove the CPB from the scan unit.
4
Disconnect the CPB cable (callout 1).
1
Figure 57.
Disconnect the CPB cable
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6 Removal and replacement 89
5
Disconnect the scan unit cable (callout 2) under the glass.
2
Figure 58.
Disconnect the scan unit cable
6
7
Face the front of the product, and remove two screws (callout 3).
Slide the scan unit toward the back of the product, and remove it.
3
Figure 59.
Remove the scan unit
90 Removal and replacement
C9148-90909
Printing-unit top cover
1
2
3
Remove the scan unit. See “Scan unit” on page 89.
Open the rear output door.
Remove two screws (callout 1) from the back of the product.
1
Figure 60.
Remove the top-cover rear-mounting screws
4
5
6
Face the front of the product, and open the control-panel door.
Remove four screws (callout 2).
Lift the top cover off of the product.
2
Figure 61.
Remove the printing-unit top cover
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6 Removal and replacement 91
Glass
Note
It is not necessary to remove the scan unit from the print unit (as shown) to remove the glass.
1
2
Remove the ADF assembly. See “ADF unit” on page 78.
Remove three screws (callout 1).
1
Figure 62.
CAUTION
Remove the glass mounting screws
Use caution, the thin plastic tab holders (callout 2) can bend or break. Avoid touching the glass.
Fingerprints and skin oils can cause poor print quality.
3
Move the glass toward the front of the product until the three plastic tabs (callout 2) release.
Lift the glass straight up, and remove it from the product.
4
After replacing the glass, calibrate the ADF/scan unit. See “Performing automatic
Calibration” on page 47.
2
Figure 63.
Remove the glass
92 Removal and replacement
C9148-90909
Scanning lamp
1
Remove the glass. See “Glass” on page 92.
CAUTION
Do not touch the lamp, because skin oils can create hot spots. Do not touch the mirror, because
fingerprints will affect print quality.
2
Note the cable routing pattern, and examine the pink cable where it rests over the cable
guide. Verify that the cable has a small black mark (callout 1). If not, make the mark yourself.
Note
When replacing the scanning lamp, transfer the black mark onto the replacement bulb cable.
Position the cable with this mark centered in the cable guide (callout 1). This ensures that the
cable has sufficient length to allow the optical unit to move to its home position. Lay the cable flat
in the cable trough. Verify that it is not twisted.
3
Disconnect the lamp connector (callout 2).
Note
A torroid may be installed on the scanning lamp cable. If a torroid is installed, remove its single
mounting screw before going on to the next step.
2
1
Figure 64.
Note the cable routing pattern
C9148-90909
6 Removal and replacement 93
4
5
Remove the cable from the cable guides and trough (callout 4).
Hold the black end (callout 5), and slide the lamp toward the back of the product (in the
direction of the arrow).
5
4
Figure 65.
CAUTION
Remove the scanning lamp
When installing the scanning lamp, the wire harness must be properly routed under the harness
clips and flat through the harness trough to avoid interference with the optical unit as it moves in
the scan unit.
Figure 66.
Scanning-lamp wire harness routing
Reinstall Note
Anytime the glass is removed and replaced, calibrate the ADF/scan unit. See “Calibration” on
page 47.
94 Removal and replacement
C9148-90909
Optical unit
1
Remove the following assemblies:
• glass. See “Glass” on page 92
• scanning lamp. See “Scanning lamp” on page 93.
CAUTION
CAUTION
Do not touch the mirror, because fingerprints will affect print quality.
It is important to note the routing and placement of the optical-unit ribbon cable before removing
it. Incorrect routing or placement when the cable is re-installed might cause damage to the cable
or the optical unit. See figure 72 on page 97.
2
Open the cable clip (callout 1) and disconnect the scanner-carriage ribbon cable from the
scanner controller PCB.
.
1
Figure 67.
Hint
Release the optical unit ribbon cable
Unsnap the clip arm from its hinge end (see figure 68) and remove it to prevent losing the clip
arm during servicing. Take note of how the clip is hinged and how it is fastened before removing it.
Hinge end
Clip end
Figure 68.
Optical-unit ribbon-cable clip
C9148-90909
6 Removal and replacement 95
3
4
Center the optical unit in the scan unit to allow access to the optical-unit drive-belt tension
bracket (callout 2).
Loosen, but do not remove, the tension-spring bracket screw (callout 3) and swivel the
bracket to release the tension on the drive-belt (callout 4). Slip both ends of the drive-belt off
the drive and tension gears.
3
2
4
Figure 69.
Release the tension-spring bracket
5
Lift the round rail up to remove it from two holders (callout 5), and remove the optical unit
from the scan unit.
5
Figure 70.
Remove the optical unit
96 Removal and replacement
C9148-90909
Reinstall Note
Reinstall Note
Anytime the glass is removed and replaced, calibrate the ADF/scan unit. See “Calibration” on
page 47.
With the optical unit installed, place the optical-unit drive-belt onto the drive and tension gears.
Verify that the drive-belt teeth face inward and are engaged with the gear teeth.
Position the bracket with the locator pins in the provided holes on the bracket, and tighten the
screw until it holds the bracket in place but still allows the bracket to move.
Verify that the bracket is correctly positioned on the locator pins, and fully tighten the screw.
Figure 71.
Optical-unit drive-belt tension bracket
Figure 72.
CAUTION
Optical-unit ribbon cable
The optical-unit ribbon cable must be looped behind the optical head and secured with the ribbon-
cable clip. Failure to correctly route or secure the ribbon cable might result in damage to the cable
or the optical unit.
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6 Removal and replacement 97
ADF door open sensor (PS10)
1
2
3
4
Remove the glass. See “Glass” on page 92.
Unplug one connector (callout 1).
Remove one screw (callout 2).
Lift the ADF door sensor up, and remove it from the product.
1
2
Figure 73.
Remove the ADF door open sensor
Reinstall Note
When replacing the glass, verify that the sensor switch pin freely moves in the hole through the
glass mounting frame.
Anytime the glass is removed and replaced, calibrate the ADF/scan unit. See “Calibration” on
page 47.
98 Removal and replacement
C9148-90909
Optical-unit drive gear/motor assembly
1
Remove the following assemblies:
• glass. See “Glass” on page 92.
• optical unit. See “Optical unit” on page 95.
2
Release the motor cable (callout 1) from the wire lance on the interlock switch, and from the
two wire-harness retainers (callout 2).
3
4
Unplug the connector (callout 3) from the scanner controller PCB.
Remove one screw (callout 4) and the cover plate.
1
4
2
3
Figure 74.
Remove the optical-unit cover plate
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6 Removal and replacement 99
5
6
Remove two screws (callout 5).
Lift the optical-unit drive gear/motor assembly (callout 6) up, and remove it from the product.
7
5
6
7
Figure 75.
Note
Remove the optical-unit drive gear/motor assembly
When replacing the gear/motor assembly, align the assembly on the three locator pins (callout 7).
Reinstall Note
Anytime the glass is removed and replaced, calibrate the ADF/scan unit. See “Calibration” on
page 47.
100 Removal and replacement
C9148-90909
Scan-unit power supply
1
Remove the following assemblies:
• glass. See “Glass” on page 92.
• optical unit. See “Optical unit” on page 95.
• optical-unit drive gear/motor assembly. See “Optical-unit drive gear/motor assembly” on
page 99.
CAUTION
The product contains components that are sensitive to electrostatic discharge (ESD). Always
perform service work at an ESD-protected workstation. If an ESD-protected workstation is not
available, discharge body static by grasping the print engine chassis before touching an ESD
sensitive component. Ground the print engine chassis before servicing the product.
2
Remove three screws and the power-supply shield (callout 1).
1
Figure 76.
Remove the power-supply shield
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6 Removal and replacement 101
3
Unplug two connectors (callout 2), and remove them from the plastic harness retainers on
the power-supply chassis.
4
5
Remove two screws (callout 3).
Remove one ground-clip screw (callout 4).
Lift the power supply up, and remove it from the scan unit.
6
.
3
2
5
4
Figure 77.
CAUTION
Remove the power supply
When replacing the power supply, do not pinch wires when installing the shield. If the replacement
power supply does not come with a grounding clip (callout 4), remove the clip from the failed
power supply and install it on the replacement unit.
CAUTION
When replacing the power supply, verify that the heat-resistant veristor cover (callout 5) is securely
in place.
Reinstall Note
Anytime the glass is removed and replaced, calibrate the ADF/scan unit. See “Calibration” on
page 47.
102 Removal and replacement
C9148-90909
Inverter PCB
1
Remove the glass. See “Glass” on page 92.
CAUTION
Hint
The product contains components that are sensitive to electrostatic discharge (ESD). Always
perform service work at an ESD-protected workstation. If an ESD-protected workstation is not
available, discharge body static by grasping the print engine chassis before touching an ESD
sensitive component. Ground the print engine chassis before servicing the product.
The inverter PCB is fuse-protected (callout 1). Before replacing the inverter PCB, verify that the
fuse is not open. The inverter PCB will not function if the fuse is open.
1
Remove one screw (callout 2).
2
3
4
Unplug one connector (callout 3).
Unfasten the clip (callout 4).
Lift the inverter PCB up, and remove it from the scan unit.
1
3
4
2
Figure 78.
Remove the inverter PCB
Reinstall Note
Anytime the glass is removed and replaced, calibrate the ADF/scan unit. See “Calibration” on
page 47.
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6 Removal and replacement 103
Scanner controller PCB
1
Remove the following assemblies:
• copy processor board (CPB). See “Copy processor board” on page 83.
• glass. See “Glass” on page 92
• optical unit. See “Optical unit” on page 95.
• inverter PCB. See “Inverter PCB” on page 103.
CAUTION
The product contains components that are sensitive to electrostatic discharge (ESD). Always
perform service work at an ESD-protected workstation. If an ESD-protected workstation is not
available, discharge body static by grasping the print engine chassis before touching an ESD
sensitive component. Ground the print engine chassis before servicing the product.
2
Unplug six connectors (callout 1) (four are shown; two more are located along the rear edge
of the PCB and can be reached through the opening created when the copy processor board
is removed).
3
Remove four screws (callout 2).
1
2
Figure 79.
Unplug the connectors
104 Removal and replacement
C9148-90909
4
Reach through the copy processor board cavity, and grasp the scanner controller PCB.
Figure 80.
Grasp the scanner controller PCB
5
Slide the scanner controller away from the product to disconnect it. Then, tilt it upward, and
lift it out of the scan unit.
Figure 81.
WARNING!
Remove the scanner controller
Do not bend or force the scanner controller PCB 40-pin connector. Before you seat the 40-pin
connector, align the scanner controller PCB and verify that the connector pins are aligned.
Reinstall Note
Anytime the glass is removed and replaced, calibrate the ADF/scan unit. See “Calibration” on
page 47.
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6 Removal and replacement 105
Intake fan
1
Remove the following assemblies:
• copy processor board (CPB). See “Copy processor board” on page 83.
• glass. See “Glass” on page 92.
• optical unit. See “Optical unit” on page 95.
2
3
Unplug the fan connector from the scanner controller PCB (the 3-pin connector is located
along the rear edge of the PCB and can be reached through the opening created when the
copy processor board was removed).
Remove three screws (callout 1).
1
Figure 82.
Remove the fan mounting screws
106 Removal and replacement
C9148-90909
4
5
Disconnect the 10-pin scanner controller PCB connector (callout 2) to provide access to the
fan air duct (callout 3). Use care when removing the fan air duct (callout 3) to prevent
bending or breaking its locking tab.
Carefully lift the fan air duct locking tab (callout 3) and slide the fan shield away (as indicated
by the arrow) from the fan, and then remove it.
6
7
Pry the top of the grounding strip (callout 4) out of the optical-unit-rail mounting hole.
Remove the wire harness from the retainer (callout 5) and pull the wire harness into the scan
unit. Lift the fan straight up, and remove it from the scan unit.
5
4
3
2
Figure 83.
CAUTION
Remove the intake fan
The fan must draw air into the scan unit. Failure to correctly position the fan can result in damage
to MFP components. Verify that the airflow arrow (located under the drive-belt tension bracket)
embossed on the fan housing points into the scan unit. Verify that the optic-unit drive belt tension
bracket (which sits on top of the fan) seats into the slot provided. See figure 84 on page 107.
Reinstall Note
Anytime the glass is removed and replaced, calibrate the ADF/scan unit. See “Calibration” on
page 47.
Figure 84.
Correctly orient the intake fan and bracket
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6 Removal and replacement 107
108 Removal and replacement
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7
Troubleshooting
Troubleshooting process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Preliminary operating checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Installation conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Media condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Unit condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Basic troubleshooting process flow . . . . . . . . . . . . . . . . . . . . . . . 113
Basic troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Power-on defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Troubleshooting with the control panel . . . . . . . . . . . . . . . . . . . . . . . . 117
Event log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Interpret the event log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Display the event log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Control-panel messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Troubleshooting with the copy processor board . . . . . . . . . . . . . . . . . 124
User-level and service-level diagnostics. . . . . . . . . . . . . . . . . . . . . . . 126
ADF paper-path test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
To print a paper-path test. . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Diagnostic tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
To perform a diagnostic test. . . . . . . . . . . . . . . . . . . . . . . . . . 126
Service-level diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
To access the service menu (PIN code: 04410002) . . . . . . . 127
Jam troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Clearing repeated ADF jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Creating a customer print job . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Evaluate the information pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Configuration page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Configuration-page elements. . . . . . . . . . . . . . . . . . . . . . . . . 130
JetDirect page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
JetDirect-page elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Supplies status page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Supplies-page elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Usage page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
File directory page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
File-directory-page elements . . . . . . . . . . . . . . . . . . . . . . . . . 135
Image-formation troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Checking the print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
EconoMode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Image-defect tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Media troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Isolate a paper path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Use the straightest paper path . . . . . . . . . . . . . . . . . . . . . . . . 140
Isolate the source of the jam . . . . . . . . . . . . . . . . . . . . . . . . . 140
C9148-90909
7 Troubleshooting 109
Determine where media jams occur . . . . . . . . . . . . . . . . . . . . 140
Is the MFP is misfeeding or creating multifeed jams. . . . . . . . 140
Isolate a media brand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Isolate a media type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Wiring diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
110 Troubleshooting
C9148-90909
Troubleshooting process
The troubleshooting process is a systematic approach that addresses the primary problems first,
and then other problems, to discover the causes for MFP malfunctions and errors. The “Basic
troubleshooting process flow” on page 113 illustrates the primary steps for troubleshooting. An
answer to a troubleshooting question allows troubleshooting to proceed to the next primary step.
When answers indicate that additional testing and correction is needed, go to the appropriate
section in this chapter and follow the directions there. After completing the additional testing and
Note
Hint
Always follow this process in sequence. Failure to do so can result in increased repair time,
difficulty, and expense.
If a remote firmware update installation fails, see “RFU installation error messages” on page 44
and/or “Firmware-update event-log errors” on page 119.
This list describes the basic questions to answer and provides the corresponding troubleshooting
sections that define the problem(s).
Table 14. Primary steps for troubleshooting
“Basic troubleshooting” on page 114
Does the MFP perform the initialization and power-on
sequence?
This table contains the procedures for basic MFP
troubleshooting.
“Control-panel messages” on page 120
“ADF paper-path test” on page 126
Does the control panel display an error condition?
This table contains the procedures for clearing control-
panel messages.
Is it possible to perform a paper-path test?
This section contains information about troubleshooting
paper-path and print-media problems.
“Evaluate the information pages” on
Does information in the event log explain the problem?
page 130
This section contains the procedures for printing the
information pages and evaluating and correcting printer
configuration.
“Image-formation troubleshooting” on
Does the print quality meet customer expectations?
page 136
This section contains print cartridge checks, information
about EconoMode, and image-defect examples.
“EconoMode” on page 137
“Media troubleshooting” on page 140
Is the media in use acceptable for this MFP?
This section contains information about how to determine
print-media problems and correct them.
C9148-90909
7 Troubleshooting 111
Preliminary operating checks
Verify that the conditions in the following lists are met before troubleshooting a specific MFP
problem.
Installation conditions
●
The MFP is plugged in, and specified power is delivered.
Hint
The print unit and the scan unit have separate power cords and power receptacles. Verify that
both of these cords are correctly installed and that the print unit’s power cord is connected to a
working power receptacle. See “Back view” on page 21.
●
The MFP receives maintenance on a regular basis. See “Cleaning the product” on page 36.
The MFP is positioned on a solid, level surface.
●
●
●
●
The MFP is not exposed to direct sunlight.
The print unit is never exposed to ammonia fumes. See “General guidelines” on page 36.
The customer is using acceptable print media. See the HP LaserJet 4100 series printer
service manual for printing specifications, or see the Print Media Guide for the HP LaserJet
printer family for general requirements.
●
●
The scanner-carriage lock is in the unlocked position. See “Front view” on page 20.
The cable from the ADF is securely fastened to the connector on the scanner-controller
assembly. See “Back view” on page 21.
●
●
●
The line voltage does not vary more than 10 percent from the nominal rated value specified
on the power-rating label. See the HP LaserJet 4100 series printer service manual for
environmental specifications.
The operating environment for the MFP is within the temperature and humidity
specifications. See the HP LaserJet 4100 series printer service manual for environmental
specifications.
Non-HP components (such as refilled print cartridges, font DIMMs, and memory DIMMs) are
removed from the MFP.
Note
Sudden changes in MFP environment can cause image defects and media-handling problems.
Make sure the MFP is not exposed to direct sunlight or to heating or cooling vents. Allow time for
the MFP and media to acclimate whenever changing environments (for example, moving from a
cold environment to a warm one). Acclimation can take anywhere from 3 to 24 hours depending
on the ambient conditions.
Media condition
●
The selected tray is properly loaded with media and the sliding media guides are adjusted
correctly.
●
●
●
The selected tray is not overfilled with media.
The media is not damp.
The media is not dirty.
Unit condition
●
Verify that The HP LaserJet 4100mfp is not in a paused print-job state (if the unit is in a
paused state, the READY LED is not illuminated and the message PAUSEDappears on the
control-panel display; see the Hint on page 30).
●
●
Verify that the HP LaserJet 4100mfp is not in PowerSave mode.
Verify that the ADF cover is closed.
112 Troubleshooting
C9148-90909
Basic troubleshooting
Verify that the conditions in the following lists are met before troubleshooting a specific MFP
problem.
Table 15. Basic troubleshooting
#
Verification steps
Possible problems
Solutions
No power.
1. Verify that the product is plugged in.
Is Power On
2. Verify that the power cable is functional and that the
power switch is on.
3. Verify that the power cord between the print unit and
the scan unit is correctly installed and fully seated at both
ends. See “Back view” on page 21.
4. Perform a print-engine test (see the HP 4100 series
printer service manual for more information).
5. Perform the power-on checks as instructed in the HP
4100 series printer service manual.
1 successful?
When power is turned on
the following events take
place:
●
The flatbed and
printing-unit fans
start operating.
●
The control panel
illuminates and the
initialization
screens appear.
●
●
The CPB LEDs
illuminate.
The optical unit
moves to the home
position and the
scanning lamp
illuminates for
about 3 seconds.
The control panel displays Consult the list of common messages in this chapter. See
Is the product ready?
2 The control panel should
function without error
an error.
“Control-panel messages” on page 120.
The control panel is not
functional, the display is
blank, or garbled text
appears on the display.
Verify that the power cord is properly plugged into its
receptacle on the flatbed unit. See “Back view” on
page 21.
Verify the control panel cable is full seated at scanner
controller board location J1210. See “Scanner controller
board connectors” on page 62.
messages and the READY
LED should be illuminated.
Verify the connector at the other end of this cable is fully
seated. See “Disconnect the scan unit cable” on page 90.
Verify that the control panel cable is fully seated in it
connector on the control panel door. See “Release the
control-panel door-support pins” on page 80.
Verify that no power-on defect exists. See “Power
malfunctions” on page 116.
Reseat the firmware and memory DIMMS. See “Copy
processor board” on page 57.
Verify any optional devices (for example a duplex
accessory) are correctly installed.
Replace the control panel. See “Control-panel door” on
page 79.
The control panel displays Consult the list of common messages in this chapter. See
Do information pages
3 print?
an error message.
“Control-panel messages” on page 120.
Print a configuration page.
The configuration page
should print without paper-
feed problems or print-
quality defects.
Media does not move
smoothly through the
flatbed paper path.
Isolate the media problem. See “Media troubleshooting”
on page 140 and “Jam troubleshooting” on page 128.
Poor print quality.
See “Image-formation troubleshooting” on page 136.
114 Troubleshooting
C9148-90909
Table 15. Basic troubleshooting (continued)
#
Verification steps
Possible problems
Solutions
Poor copy quality.
See “Image-formation troubleshooting” on page 136.
Is the copy function
4 operational?
Print quality is acceptable Calibrate the flatbed. See “Calibration” on page 47.
Place the configuration
but the image is not
properly registered on the
page.
page into the ADF input
and copy it. The page
should feed smoothly
through the flatbed path
and copies should print
without print-quality
problems. Copy first from
the glass and then from
the ADF to determine if the
problem is with the print
unit or the scan unit.
Media does not move
Isolate the media problem. See “Media troubleshooting”
smoothly through the ADF on page 140 and “ADF paper-path test” on page 126.
paper path.
C9148-90909
7 Troubleshooting 115
Power-on defects
Table 16. Power malfunctions
Item
Solution
ADF unit or scan unit does not function.
●
Print a print-engine test (see the HP LaserJet 4100
series printer service manual for more information).
This helps to isolate the power malfunction to the print
unit or the scan unit.
●
●
Verify that the power connector from the print unit to
the scan unit is correctly plugged in at both ends. See
“Back view” on page 21.
Verify that the flatbed intake fan is functioning (the unit
is receiving power). If the fan is not functioning, verify
that the connectors at J1203 (scanner controller PCB)
and J1201 (power supply) are correctly connected
and fully seated.
●
●
Check for frayed, pinched, or damaged wires.
Verify that the flatbed power supply is functioning.
Printer is functioning (power on, fans running,
and so forth) but the control-panel display is
blank or displays garbled text.
●
●
Verify that the control-panel cable connector location
J1210 on the scanner controller PCB is correctly
connected and fully seated.
Verify that the control-panel wire harness is correctly
connected to the control-panel door (located behind
door” on page 79.
●
Verify that the power supply in the flatbed unit is
functioning.
●
●
Check for frayed, pinched, or damaged wires.
Replace the control panel.
Hint
The control panel gets its power from the power supply in the scan unit, not
the power supply in the print unit.
No ac power.
Defective power-supply unit.
●
●
●
Verify that the power-supply fuse is not blown (power-
supply PCB location F101).
Verify that all power-supply connectors are fully
seated.
Replace the power supply. See “Scan-unit power
supply” on page 101.
No dc power.
No ac power is supplied.
●
●
Check for ac power.
The overcurrent/overvoltage detection circuit is
activated.
Turn off the MFP and then turn it back on. If the
problem persists, find the cause of the overcurrent/
overvoltage on the load side of the power-supply
circuits. See “Power supply” on page 63.
Note
Leave the MFP off for two minutes.
Defective wiring, dc loads, or scanner
controller PCB.
●
Turn off the power switch. Check the wiring ahead of
the scanner controller PCB and check the dc loads. If
you discover the problem, replace the wiring and dc
loads. If no problem exists on the wiring or dc loads,
replace the scanner controller PCB. See “Power
supply” on page 63.
116 Troubleshooting
C9148-90909
Troubleshooting with the control panel
The tables in this section explain common messages that might appear on the control-panel
display.
Within each table, the messages and their meanings are listed in alphabetical order, with
numbered messages listed at the end of the tables.
Control-panel display
The control panel should display READY, PAUSED, or POWERSAVE ON. For information about error
messages that appear, see the event log. If the control panel is blank or garbled, see “Power-on
defects” on page 116.
Hint
If the control-panel messages are in a language other than the one the user wants, use the menu
map (see “Menu map” on page 33) and the navigation buttons (see “Navigation” on page 31) to
enter the configure device system setup submenu. Scroll down to the language options and select
the appropriate language.
Event log
Use the event log to diagnose and troubleshoot MFP errors and intermittent failures. You can
either print or display the event log from the control panel. (Select Print Event Logor Show
Event Log.)
The event log records up to 50 entries, with the most recent entry at the top of the list. When
recording entries after 50, the oldest entry (found at the bottom of the list) is dropped off the list
to make room for the most recent entry. The printed event log is printed in four columns, showing
event number, page count, error code, and description or personality.
The description or personality gives detail to the error messages. The information is useful for
troubleshooting.
Items that should be logged in the event log include the following:
●
●
●
●
●
●
●
●
●
critical errors
jams
sensors sensing out of range
deleted jobs
unexpected paper size
complex page
buffer overflow
NVRAM changes
any diagnostics tests
Print the event log
The MFP internal event log stores the 50 most recent events, and can be printed at any time. To
print the event log:
1
2
3
4
5
Using the navigation buttons, open the menu.
Select DIAGNOSTICS.
Select PRINT EVENT LOG.
Press the SELECT ( ) button.
The control panel displays Printing event logand the event log is printed.
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7 Troubleshooting 117
Interpret the event log
Each individual entry in the log is called an error, while all errors that occur at the same page
count are called an event. Events usually conclude with a time-out or no response from the
device (error 66.xyin the event log).
Use the event log tables in this section to associate errors in the event log with the control-panel
error message.
1
2
Check the event log for specific error trends in the last 10,000 printed pages.
Ask the customer for any observed error trends. (For example, do jams tend to occur in a
specific area of the MFP?)
3
4
Record any specific error trends.
See “Control-panel messages” on page 120 and follow the recommended action.
Figure 86.
Sample MFP event-log page
118 Troubleshooting
C9148-90909
Display the event log
The displayed event log allows the customer to scroll through the contents of the event log from
the control panel. Select this to display the 50 most recent events, with the most recent first. Use
the navigation buttons to scroll through the event log contents. If the event log is empty, the
control panel will display Event Log Is Empty.
Note
If an error occurs when upgrading MFP firmware, the error codes in table 17 on page 119 are
entered into the event log. An error message does not appear on the control-panel display.
Follow these steps to display the event log:
1
2
3
4
Press the MENU button.
Select DIAGNOSTICS.
Select SHOW EVENT LOG.
The event log appears.
Page count
Event code Error type
13.3 Paper Jam
xxxxxxx xx xxxx
Appears on the display panel
Appears in the event log
Figure 87.
Hint
Control-panel display of the event log
Whenever a 13.xxjam message appears on the control panel, a good practice is to clear the
jammed paper from the MFP, press STOP to stop printing, and print the event log. Even if you
cannot print the event log, you can display it on the control panel.
Table 17. Firmware-update event-log errors
Event-log
display
Explanation
Recommended action
99.01.00
99.02.00
99.03.00
The cyclical redundancy code
(CRC) value in the incoming
upgrade is different from that
stored in MFP memory. The
buffered firmware image is
discarded.
1. Verify that you are using the correct
firmware upgrade version and try
upgrading the firmware again.
The input/output connection was
disrupted during the firmware
upgrade.
1. Verify that the copy processor board is
firmly seated in its connector.
2. Verify that the formatter is firmly seated
in its connector.
2. Verify that the high-speed copy connect
cable is firmly connected at both ends.
The firmware image being written
to the hard-drive disk does not
match the image stored in the
MFP’s memory.
1. Verify that you are using the correct
firmware upgrade version and try
upgrading the firmware again.
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7 Troubleshooting 119
Control-panel messages
Be sure to read the exact text of the control-panel message, including the error message number
(not all error messages display an error number) and the text, in order to locate the error
message in the tables. The control panel for this MFP stores enhanced information.
Not all possible error messages that can appear on the control-panel display are listed in table 18
on page 120. If a message appears that is not in this table see the HP LaserJet 4100 series
printer service manual for more information about control-panel messages.
The messages displayed on the control panel provide six categories of information. Each
highest priority message appears. When it has been cleared, the next priority message appears,
and so on. The displayed messages and their priorities are:
●
●
●
●
Status messages—Status messages communicate the current state of the MFP to the
operator.
Warning messages—Warnings are messages that are important enough that the user must
acknowledge them, but not serious enough to make the MFP stop the printing process.
Error messages—Error messages communicate to the operator that some action must be
performed, such as adding paper or clearing a jam.
Critical error messages—Critical error messages communicate MFP failures to the
operator.
Hint
If the control panel display is blank or messages appear garbled, see “Basic troubleshooting” on
page 114.
Table 18. Control-panel error messages
Message
Explanation
Recommended action
ADF Pick Error
Too many pages have been placed
in the ADF.
The ADF separation pad or roller
is dirty, damaged, or not properly
installed.
1. Remove some of the pages and try the
operation again. If necessary, open the
ADF cover and remove any jammed
media, and then close the ADF cover.
2. Verify that the document-detect-sensor
(PS2) and leading-edge-sensor (PS1)
flags can freely move (see “ADF-unit
components” on page 56).
3. Verify that the ADF separation pad and
roller are clean, in good condition, and
properly installed (see “Cleaning the
roller” on page 76, and “ADF separation
pad” on page 77).
ADF Paper Jam
A page has jammed inside the
ADF and must be cleared before
copying can continue.
1. Raise the ADF cover and remove the
jammed media, and then lower the ADF
tray.
2. Refer to steps for clearing an ADF
misfeed error.
3. Verify that the ADF paper delivery guide
is clean and its clear plastic sheet properly
installed (see “Cleaning the ADF delivery
guide (clear mylar strip)” on page 37).
Calibration
Failed
The auto calibration procedure
was not completed.
1. Verify that there is not any media left on
the glass from a previous copy job.
2. Attempt to perform the auto calibration
procedure again (see “Performing
automatic Calibration” on page 47).
120 Troubleshooting
C9148-90909
Table 18. Control-panel error messages (continued)
Message
Explanation
Recommended action
Check Cables And
Cycle Power
Communication between the
printer formatter and the copy
processor board has failed.
1. Verify that the high-speed copy connect
cable between the formatter and the copy
processor board is correctly connected
(see “Formatter cage” on page 87).
Reseat the connectors.
2. Verify that the copy processor board is
firmly seated into the connector on the
intermediate PCB.
wires.
4. Verify that the firmware DIMM and
memory DIMM on the copy processor
board are firmly seated. See “Copy
processor board” on page 57.
5. Verify that the copy processor board
LEDs are illuminated. See the table in
board” on page 124.
Incomplete
Initialization
Error
A sensor is not in the correct
position when the MFP is
initializing when the power is
turned on.
1. Verify that all of the sensors move freely
(see “Scan-unit components” on page 55
and “ADF components” on page 56).
2. Turn the power off, and then back on.
Flatbed Cover
Open
The ADF cover is open or the ADF
door sensor (PS10) is not properly
functioning.
1. Close the ADF door. Press the START
button.
2. Verify that the ADF door sensor (PS10)
is functioning.
●
Open the cover. The message on the
control panel should alternate between
READYand FLATBED COVER OPEN.
Perform a sensor service test (see
“Diagnostic tests” on page 126.
●
3. Check the ADF door sensor (PS10) for
loose connectors or pinched and frayed
wires.
4. Replace the sensor if necessary (see
“ADF door open sensor (PS10)” on
page 98).
Processing Auto
Cleaning Page
The auto-cleaning page is in
process. This can take up to 2.5
minutes.
1. Wait until the cleaning page has printed.
2. Reload the source document and press
START to begin the job. See the
HP LaserJet 4100 series printer service
manual for more information.
Processing
The manual-cleaning page is in
process. This can take up to 2.5
minutes.
1. Wait until the cleaning page has printed.
Cleaning Page
2. Reload the source document and press
START to begin the job. See the
HP LaserJet 4100 series printer service
manual for more information.
Resend Upgrade
The firmware image was corrupted
during an upgrade operation.
Start the firmware upgrade operation over.
See “Downloading a remote firmware
update” on page 41.
C9148-90909
7 Troubleshooting 121
Table 18. Control-panel error messages (continued)
Message
Explanation
Recommended action
30.0.01
Communication has failed
between the copy processor board
and the formatter.
1. Verify that the high-speed copy connect
cable between the formatter and the copy
processor board is correctly connected
(see “Formatter cage” on page 87).
Reseat the connectors.
2. Verify that the copy processor board is
firmly seated into the connector on the
intermediate PCB.
or
30.0.02
SCANNER I/O
FAILURE CHECK
COPY CONNECT CARD
3. Check for broken, frayed, or pinched
wires.
4. Verify that the copy processor board
LEDs are illuminated. See the table in
“Troubleshooting with the copy processor
board” on page 124.
30.1.06
Scan-unit intake-fan failure.
fan is functioning (the fan is off when the
MFP is in PowerSave mode). See “Scan-
unit intake fan” on page 68.
Scan Failure
or pinched wires. Reseat the fan connector
at scanner controller PCB location J1203
(see “Scanner controller board
connectors” on page 62).
3. Replace the fan.
30.1.15
The flatbed cover is open while the
MFP is initializing after the power
is turned on.
1. Turn the power off.
2. Close the flatbed cover.
3. Turn the power on.
Scan Failure
30.1.17
Flatbed optical-unit-motor failure.
1. Verify that the optical-unit lock is in the
unlocked position. See “Front view” on
page 20.
Scan Failure
2. Verify that the flatbed optical unit moves
during initialization when the power is
turned on.
-Or-
Use the control-panel diagnostic menu to
test the scanner motor. See lamp test in
“Diagnostic tests” on page 126.
3. Verify that the optical-unit drive-belt is
properly installed, tensioned, and that its
teeth are meshed with the drive gear.
Verify that the ribbon cable is properly
installed and does not hinder the optical-
unit movements (see “Optical unit” on
page 95).
4. Check for loose connectors and frayed
or pinched wires. Reseat the optical-unit
connector at scanner control PCB location
J1207 (see “Scanner controller board
connectors” on page 62).
5. Replace the scan-unit optical-unit gear/
motor assembly.
30.1.18
An Application-specific integrated
circuit (ASIC) has failed on the
scanner control board.
1. Turn the power off.
Scan Failure
2. Reseat the scanner controller board.
Turn the power on. If the error message
persists, replace the scanner controller
board.
122 Troubleshooting
C9148-90909
Table 18. Control-panel error messages (continued)
Message
Explanation
Recommended action
30.1.19
The scanning lamp does not
illuminate. Inverter PCB or
scanning lamp failure.
1. Verify that the scanning lamp briefly
illuminates when the product’s power is
turned on (open the flatbed cover to view
the lamp and then turn the power on).
-Or-
Scan Failure
Use the control-panel diagnostic menu to
test the lamp. See light source test in
“Diagnostic tests” on page 126.
2. Verify that the scanning lamp fuse
located on the Inverter PCB is not open
(see “Inverter PCB” on page 103).
3. Check for loose connectors and frayed
or pinched wires. Reseat the inverter
connector at inverter PCB location CN2
“Scanner controller board connectors” on
4. Replace the scanning lamp with a
known functioning lamp. If the problem
persists, proceed to the next step.
5. Replace the inverter PCB.
30.1.20
or
30.1.21
The copy processor board has
experienced a processing error.
1. Turn the power off and then back on.
2. If the error message persists, replace
the copy processor board.
or
3. Verify that the copy processor board
LEDs are illuminated. See the table in
“Troubleshooting with the copy processor
board” on page 124.
30.1.22
or
30.1.25
Scan Failure
Scanning From
Glass
ADF document-detect sensor
(PS2) did not detect a document in
the ADF input tray.
1. Verify that the source documents are
properly inserted in the ADF.
2. Verify that no media has jammed in the
ADF document path (see “Document
jams” on page 68).
3. Verify that the document-detect-sensor
flag is not damaged and that it moves
freely (see “ADF components” on
page 56).
4. Use the control-panel diagnostic menu
to test the sensor. See “Diagnostic tests”
on page 126.
5. Verify that the ADF serial cable is
securely connected to the copy processor
board (see “Back view” on page 21).
6. Verify that the document-detect-sensor
flag is not damaged and that it moves
freely (see “ADF components” on
page 56).
(appears when
attempting to use
the ADF; if you
press the start
button and the ADF
document-detect
sensor [S1] does
not detect a source
document, theMFP
attempts to scan
from the glass)
7. Replace the ADF unit (see “ADF unit” on
page 78).
C9148-90909
7 Troubleshooting 123
Troubleshooting with the copy processor board
The table in this section is a quick reference source for troubleshooting common copy processor
board (CPB) failures that might occur after or during CPB initialization. The LED pattern column
describes the status of the four LEDs located on the back of the MFP. The control-panel display
column lists the messages that appear on the control-panel display when a failure occurs. The
MFP functionality column describes what MFP functions are affected by the CPB failure. The
action column lists the appropriate CPB troubleshooting steps.
To troubleshoot the CPB using the LEDs, check the LEDs that are illuminated and those that are
not. Check for messages appearing on the control-panel display. Press the SELECT ( ) button to
corresponding procedure that is listed in the action column of the table.
For information about LED patterns that appear while the CPB is initializing, see “Copy
processor board LEDs” on page 59.
Note
Hint
initialization (when MFP power is first turned on). For information about CPB initialization LED
patterns and their meanings, see “Copy processor board” on page 57.
The print and scan units have separate power supplies. The control panel and the CPB are
powered by the power supply in the scan unit.
The LEDs can be difficult to see through the holes provided in the CPB faceplate (callout 1) in a
high-light environment. It might be necessary to turn off some lights or remove the faceplate to
see the LEDs.
1
Figure 88.
Copy processor board LEDs
124 Troubleshooting
C9148-90909
Table 19. Troubleshooting copy processor board LEDs
Control panel display MFP functionality
LED pattern
Action
(LJ4100mfp and
LJ4101mfp only)
OFF OFF OFF OFF None (no power)
●
●
●
Print (a configuration page)-no
Copy (from the ADF or glass)-no
Send (digital sending)-no
1. Verify the MFP power is turned on
(see “Basic troubleshooting” on
page 114 and “Power-on defects” on
page 116).
2. Verify that the MFP is plugged into
OFF OFF OFF OFF Alternates between Power
and Check Cables And Cycle
Power
Select OK, then attempt to
1. Reseat the CPB.
2. Turn the MFP power off, then back
on again.
3. Verify that the scan unit power
supply is functional (see “Power
supply” on page 63 and “Power-on
●
●
●
Print (a configuration page)-no
Send (digital sending)-no
ON* OFF ON ON
*Flashing
READY, POWERSAVE ON,
or PAUSED
●
●
●
required. For information about the
PAUSED or POWERSAVE ON
modes, see the hint in “Using the
control panel” on page 30.
Copy (from the ADF or glass)-yes
Send (digital sending)-yes
ON* OFF ON OFF
*Flashing
Alternates between Power
and Check Cables And Cycle
Power
Select OK, then attempt to
1. Verify that the high-speed copy
●
●
●
Print (a configuration page)-yes connect cable is fully seated at both
ends (see “Copy processor board” on
page 83 and “Formatter cage” on
page 87).
Copy (from the ADF or glass)-no
Send (digital sending)-no
OR
OFF OFF ON OFF
2. Turn the MFP power off, then back
on again.
3. Replace the high-speed copy
connect cable.
ON* ON ON ON
*Flashing
Alternates between Power
and Check Cables And Cycle
Power
Select OK, then attempt to
1. Reseat the firmware DIMM (see
●
●
●
Print (a configuration page)-yes “Copy processor board” on page 57).
2. Turn the MFP power off, then back
on again.
Copy (from the ADF or glass)-no
Send (digital sending)-no
ON** ON ON ON
**Dimly lit LED
Alternates between Power
and Check Cables And Cycle
Power
Select OK, then attempt to
1. Reload the MFP firmware (see
●
●
●
Print (a configuration page)-yes “Downloading a remote firmware
update” on page 41).
Copy (from the ADF or glass)-no
Send (digital sending)-no
2. Replace the firmware DIMM (see
see “Copy processor board” on
page 57).
ON ON ON ON
Alternates between Power
and Check Cables And Cycle
Power
Select OK, then attempt to
1. Reseat the memory DIMM (see
●
●
●
Print (a configuration page)-yes “Copy processor board” on page 57).
2. Verify that the memory DIMM is a
16MB DIMM.
3. Replace the memory DIMM.
4. Reseat the firmware code DIMM.
Copy (from the ADF or glass)-no
Send (digital sending)-no
Note
Hint
If the CPB failure persists after all attempts to troubleshoot the problem, replace the CPB.
The LED patterns an HP LaserJet 4100/4101mfp displays are the opposite of those on the
HP LaserJet 9000mfp because of how the CPBs are mounted. The CPB is mounted upside down
in the HP LaserJet 9000mfp.
C9148-90909
7 Troubleshooting 125
User-level and service-level diagnostics
ADF paper-path test
The paper-path test can be used to verify that various paper paths are working properly or to
troubleshoot problems with tray configuration.
To print a paper-path test
1
2
3
4
5
Press the MENU button.
Select DIAGNOSTICS.
Select PAPER PATH TEST.
Select the source, destination, and number of copies (1, 10, 50, 100, 500) to be printed.
Select PRINT TEST PAGEto start the paper-path test.
Diagnostic tests
The diagnostic tests verify the functionality of ADF-unit and flatbed-unit components. These tests
are useful in identifying ADF-unit and flatbed-unit malfunctions.
To perform a diagnostic test
1
2
3
Press the MENU button.
Select DIAGNOSTICS.
Select SCANNER. The following flatbed components can be tested.
● SENSORS; tripping various sensor flags causes a sensor-status message to appear on the
control-panel display
• PS1 leading-edge paper-detect photo sensor (see “Leading-edge sensor (PS1)” on
page 68)
• PS2 document-detect photo sensor (see “ADF-unit components” on page 56)
• PS10 flatbed-cover-open photo sensor (see “Scan-unit components” on page 55)
• PI1201 optical-unit home-position photo sensor (see “Optical unit” on page 65) (to trip this
sensor, perform a copy job with the sensor-status screen displayed on the control panel)
● ADF OUTPUT MOTOR; activates the ADF motor and all of the ADF feed rollers (see “ADF
document-feed system” on page 67)
● SCANNER MOTOR; activates the optical-unit motor, causing the optical unit to move back and
forth in the flatbed (see “Optical unit” on page 65)
● PICKUP SOLENOID; energizes the ADF pickup solenoid (see “ADF document-feed system” on
page 67)
● LIGHT SOURCE; illuminates the scanning lamp, which verifies that the inverter PCB and lamp
are functioning properly (see “Scanning lamp” on page 66)
4
Select CONTROL PANEL. The following control-panel components can be tested.
● LEDs; illuminates the three control-panel LEDs (see “Layout and operation” on page 30)
● DISPLAY; illuminates all of the control-panel-display pixels (see “Layout and operation” on
page 30)
● BUTTONS; shows on the control-panel display a layout of the control-panel buttons and keys;
when a button or key is selected on the control panel it is illuminated on the display,
indicating that the button or key is functioning (see “Layout and operation” on page 30)
5
Press the START button to begin a test. Press the STOP button to end the test.
126 Troubleshooting
C9148-90909
Service-level diagnostics
Service menu
The service menu MFP commands should be used only by authorized service personnel. You
can gain access to the service menu only by using the service PIN code 04410002. While in the
service menu, you can do the following:
●
●
Clear the event log.
Verify and set the page count and serial number. These are shown on the configuration
page.
●
●
Change the maintenance intervals.
Set the cold-reset paper size.
To access the service menu (PIN code: 04410002)
1
2
3
Press the MENU button.
Select SERVICE. Enter PIN code (04410002). Press the SELECT ( ) button.
Use the navigation buttons to scroll to the desired service-menu item. See table 20 on page
127.
4
Press the SELECT ( ) button to save a new setting or to perform a service-menu action and
exit the service menu.
Table 20. Service menu
Item
Description
Clear event log
Removes all recorded events from the log.
CAUTION
Clearing the event log is a
permanent action and cannot
be undone.
Total page count
Lifetime count of all pages--scanned, copied, and printed.
Maintenance count
Number of pages copied and printed since the last
maintenance interval.
Maintenance interval
Number of pages copied and printed that will cause the
Perform Printer Maintenance message to appear on
the control-panel display (the default setting is 200,000
pages).
ADF count
Lifetime count of all pages scanned using the ADF.
Lifetime count of all pages scanned using the flatbed.
Lifetime count of one-sided pages scanned using the ADF.
Flatbed count
ADF simplex count
Copy scan count
Lifetime count of one-sided pages scanned for copy jobs
using the ADF or the flatbed.
Send scan count
Lifetime count of one-sided pages scanned for digital send
jobs using the ADF or the flatbed
Copy pages count
Scanner settings
Lifetime count of pages printed as output from copy jobs
Scanner NVRAM settings can be saved and restored in
case they are needed when upgrading MFP firmware.
Serial number
Displays the MFP’s serial number.
Cold reset paper
Default paper size when the MFP is reset (the default
setting is letter).
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7 Troubleshooting 127
Jam troubleshooting
Media jams occur when media either does not reach or does not clear the document-detect
sensor (PS1) and leading-edge sensor (PS2) in a specific amount of time (see “ADF document-
feed system” on page 67 and “ADF components” on page 56). If a paper jam occurs, a 13.XX
PAPER JAM message appears on the MFP control panel.
Jams
Jams occur most often when the following conditions exist:
●
●
The print media does not meet the specifications listed in the Print Media Guide for the HP
LaserJet printer family.
●
●
The media is in poor condition. See “General guidelines for using the ADF unit” on page 28.
The MFP needs cleaning. See “Cleaning the product” on page 36.
Table 21. General ADF jam troubleshooting
Cause
Solution
Continuous jams
●
●
sensor flag can freely move (see “ADF document-feed
system” on page 67 and “ADF components” on page 56).
Verify that the ADF separation pad and roller are clean, in good
condition, and properly installed (see “Cleaning the product” on
page 36, “ADF separation roller” on page 76, and “ADF
separation pad” on page 77).
●
Verify that the ADF paper delivery guide (clear mylar strip) is
clean and its clear plastic sheet is properly installed (see
“Cleaning the ADF delivery guide (clear mylar strip)” on page 37).
Multiple feed
Dirty/worn/deformed separation
pad or roller.
●
●
If the separation pad or roller is dirty, clean it.
If the separation pad or roller is worn or deformed, replace it.
Dirty/worn/deformed feed roller.
●
●
If the feed roller is dirty, clean it.
If the feed roller is worn or deformed replace it.
Wrinkles/folded leading edge
Dirty/worn/deformed separation
pad or roller.
●
●
If the separation pad or roller is dirty, clean it.
If the separation pad or roller is worn or deformed, replace it.
Dirty/worn/deformed feed roller.
●
●
If the feed roller is dirty, clean it.
If the feed roller is worn or deformed, replace it.
Dirty/worn/deformed delivery
roller.
●
●
If the delivery roller is dirty, clean it.
If the delivery roller is worn or deformed, replace it.
Skew
Paper dust or dirt in the feed roller
or feed guide.
●
●
●
Clean the dirty area. See “Cleaning the ADF delivery guide (clear
mylar strip)” on page 37.
ADF input tray guides are not
properly adjusted.
Verify that the guides are not adjusted either too tightly against
the media or too loosely and separate from the media.
Scratched/deformed feed guide.
Check the paper path. If the guides are scratched or deformed,
replace the ADF input tray. See “ADF input tray” on page 73
128 Troubleshooting
C9148-90909
Clearing repeated ADF jams
1
Check to see that media is correctly loaded in trays and that the ADF input tray guides are
correctly adjusted (see “General ADF jam troubleshooting” on page 128).
2
Try turning over the stack of paper in the tray. If you are using letterhead paper, try printing
from a different tray.
3
4
Do not use previously printed paper or torn, worn, or irregular paper.
Check the media specifications. If the media is outside of the recommended specifications,
problems might occur. See the Print Media Guide for the HP LaserJet printer family.
Creating a customer print job
Ask the user to send a print job from the problem source(s) to the problem destination(s). Try to
recreate the jam errors by having the user perform a paper-path test. See “ADF paper-path test”
on page 126.
When verifying print jobs, make sure that all of the settings are selected as the way the user
wants them. Keep in mind that application settings take priority over driver settings, which take
priority over the MFP control-panel settings. If a single setting is not present in the application,
but is set in the driver, that setting overrides the control-panel settings.
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7 Troubleshooting 129
Evaluate the information pages
From the MFP control panel, you can print pages that give details about the MFP and its current
configuration. The following information pages are available:
●
Configuration page
• JetDirect page (if a JetDirect card is installed)
File-directory page
●
●
Usage page
To select and print items from the information menu:
1
2
3
4
Press the MENU button.
Select INFORMATION.
Select the information page you want to print.
Press the SELECT ( ) button to print the information page.
Configuration page
Use the configuration page to view current MFP settings, to help troubleshoot MFP problems, or
to verify installation of optional accessories, such as memory (DIMMs), input and output paper-
handling accessory, and printer languages.
The content of the configuration page varies, depending on the options currently installed in the
MFP. Additional information about optional MFP accessories (for example, an optional paper tray,
duplex unit, envelope feeder, or additional memory) will appear on this page if they are installed.
Configuration-page elements
Use the configuration page to verify the installed firmware version, maintenance interval setting,
three most recent entries in the event log, total memory installed, installed options, and other
useful information about the MFP product. The configuration page contains information about the
following attributes:
A. Device information
B. Event log
C. Installed personalities and options
D. Memory
E. Security
F. Paper trays and options
Hint
Adding the digital-sending capability to the MFP changes the layout of the configuration page
from the sample used in this manual.
130 Troubleshooting
C9148-90909
CPB firmware
version
(flash DIMM)
This might not
change when a
remote firmware
update is installed
A
D
Formatter
firmware (print
engine) version
(located on the
hard disk)
This changes
when a remote
firmware update is
successfully
installed
E
F
B
C
LDAP and SMTP
information was
now appears on
the configuration
page
Figure 89.
Hint
Sample configuration page
If an HP JetDirect EIO card is installed, an HP JetDirect configuration page will also be printed.
C9148-90909
7 Troubleshooting 131
JetDirect page
Use the JetDirect page to view current network settings, to help troubleshoot MFP problems, or
to verify network statistics or protocol information.
JetDirect-page elements
A. HP JetDirect configuration
B. Network statistics
C. Protocol information
Jet Direct
firmware can be
updated, but is not
updated when a
remote firmware
upgrade is
A
installed
B
C
Figure 90.
Sample JetDirect page
132 Troubleshooting
C9148-90909
Supplies status page
Use the supplies status page to view current printer supply status, to help troubleshoot MFP
problems, or to verify MFP information.
Supplies-page elements
A. Supplies-ordering information
B. Cartridge information
C. Other supplies information
D. Device information
A
2
B
C
D
Figure 91.
Sample supplies status page
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7 Troubleshooting 133
Usage page
The usage page is designed to fit into a pay-per-page (PPP) model. A reseller can configure the
usage page with instructions that a user can send the information back to the reseller in order to
prepare bills.
Print a usage page from the MFP control panel (or gain access to the information remotely from
HP Web JetAdmin) to determine how many simplex or duplex pages of each paper size have
been scanned on the copy module and printed on the MFP. Counting pixels approximates
average toner coverage. Jams are not counted. The data cannot be reset manually, and values
such as total print and scan impressions, toner coverage, serial number, default language, and
default paper size are backed up between the MFP NVRAM and hard disk.
Figure 92.
Sample usage page
134 Troubleshooting
C9148-90909
Image-formation troubleshooting
When working with users, obtain a print sample before troubleshooting the MFP. Also, ask the
user to describe the quality expected from the MFP. The print sample helps clarify the user’s
description of the problem.
Hint
When troubleshooting image defects, try scanning a test page through the ADF and from the
glass to help isolate the cause of the image defect to the ADF or the print unit.
Often an image-formation problem can be linked to media that is outside the specifications
Hewlett-Packard has established for optimum MFP performance. See “Media troubleshooting” on
page 140 for help with persistent image-formation problems.
Table 22. Image-quality checks
Image-quality checks
Action
Is the print cartridge full and is “Checking the print cartridge” on page 137
it manufactured by HP?
Is the customer using print
media that meets all HP
specifications?
“Media troubleshooting” on page 140
Is the print sample similar to
those in the image-defect
tables?
“Image-formation troubleshooting” on page 136
Does the media meet HP
standards?
Media Guide for the HP LaserJet printer family.
136 Troubleshooting
C9148-90909
Checking the print cartridge
Image-formation defects are often the result of problems with the print cartridge. Use the
following list to verify that the print cartridge is still operating correctly.
Hint
If toner gets on your clothing while you are handling the print cartridge, wipe it off with a dry cloth
and then wash the clothing in cold water.
Perform all of the following checks before replacing the print cartridge.
●
Verify that the print cartridge has toner.
• 6000-page capacity full print cartridge weight is about 1343 grams (47.4 oz).
• 10,000-page capacity full print cartridge weight is about 1490 grams (52.59 oz).
• 6000-page capacity empty print cartridge weight is about 1105 grams (39.0 oz).
• 10,000-page capacity empty print cartridge weight is about 1110 grams (39.18 oz).
Check the print cartridge to see if it has been disassembled or refilled.
Verify that the print cartridge is seated properly in the MFP cavity.
●
●
●
Inspect the cartridge for toner leaking through worn seals. (Manual rotation of the drum can
cause internal damage, and toner spills can result.)
Note
The print cartridge is rated for 6000 to 10,000 images at five-percent coverage. Check the surface
of the photosensitive drum in the cartridge to see if it has been damaged or scratched. Touching
the drum contaminates the photosensitive surface and might cause spotting and defects during
printing.
●
White areas on the page might indicate that the drum has been exposed to light for too long.
If white areas appear, stop the MFP and wait a few minutes. This should eliminate most
defective images. If not, the print cartridge can be placed in a dark environment for several
days, which might restore some life to the drum.
EconoMode
EconoMode creates draft-quality printing by reducing the amount of toner on the printed page by
up to 50 percent. Advise the customer to turn EconoMode on or off either from the printer driver
or a software application.
C9148-90909
7 Troubleshooting 137
Image-defect tables
Hint
The image defects described in this section are associated with the ADF unit and the scan unit.
For more information about image defects and their causes, see the HP LaserJet 4100 series
printer service manual.
The MFP output quality is subject to user judgment. This section of the manual helps define
print-quality defects and the factors that affect print quality.
The print samples shown in the following figures illustrate some print-quality defects. To use for
future reference, HP suggests that you keep copies of print-quality defects you encounter in the
field and an explanation of their causes.
Hint
When troubleshooting image defects, try scanning a test page through the ADF and from the
glass to help isolate the cause of the image defect to the ADF unit, scan unit or the print unit.
Table 23. Image defects
Problem
Condition
Solution
Distorted images
Improper optical-unit drive-belt
tension.
●
Adjust the belt tension for the pickup
motor. See “Optical unit” on page 95.
●
If the problem persists, replace the
belt. See “Optical unit” on page 95.
Blank page (when
using the ADF)
The source document was not
placed in the ADF input tray face-up.
●
Verify that the source document is
face-up in the ADF input tray.
The source document was not
detected in the ADF input tray.
●
●
Remove and then reinsert the source
document into the ADF input tray.
Verify that the document-detect-sensor
(PS2) flag freely moves See “ADF
components” on page 56.
●
●
Use the control-panel diagnostic test
to verify that the sensor, ADF motor,
and pickup solenoid are fuctional. See
“Diagnostic tests” on page 126.
A source document was not picked
up when attempting to feed multiple
documents.
Inspect the ADF pickup and separation
rollers for damage. See “ADF
components” on page 56. Clean the
rollers if dirty. See “Cleaning the
product” on page 36.
Horizontal lines
Dirty glass, whiteboard cover, ADF
delivery guide (clear mylar strip).
●
●
Clean the glass, whiteboard cover,
and/or ADF delivery guide. See
“Cleaning the product” on page 36.
ADF unit and/or scan unit is
improperly calibrated.
Calibrate the scan unit. See
“Calibration” on page 47 and/or
“Performing manual calibration” on
page 48.
138 Troubleshooting
C9148-90909
Table 23. Image defects (continued)
Problem
Condition
Solution
Page skew
The ADF unit or scan unit needs to
be calibrated.
●
Calibrate the scan unit. See
“Calibration” on page 47 and/or
“Performing manual calibration” on
page 48.
ADF input tray guides are not
properly adjusted.
●
Verify that the ADF guides are not
adjusted to tightly against the media or
to loosely and separate from the
media.
ADF paper delivery guide (clear
mylar strip) is dirty.
●
●
Clean the ADF paper delivery guide.
See “Cleaning the ADF delivery guide
Vertical lines
Dirty glass, whiteboard cover, ADF
delivery guide (clear mylar strip).
Clean the glass, whiteboard cover,
and/or ADF delivery guide (clear mylar
page 36.
ADF unit and/or scan unit is
improperly calibrated.
●
Calibrate the scan unit. See
“Calibration” on page 47 and/or
page 48.
Deformed pickup roller.
●
Replace the deformed roller. See “ADF
pickup roller” on page 74.
Foreign substances are deposited
on the pickup roller.
●
●
Clean the pickup roller (flatbed).
If the problem persists, replace the
pickup roller. See “ADF pickup roller”
on page 74.
Defective optical-unit CCD driver.
●
●
●
Replace the optical unit. See “Optical
unit” on page 95.
Scars on the mirrors or lens in the
flatbed optical unit.
Replace the flatbed optical unit. See
“Optical unit” on page 95.
Image shifted
Image is shifted vertically,
horizontally, or both ways on the
page. Scan unit is improperly
calibrated.
Calibrate the scan unit. See
“Calibration” on page 47.
Image skips
Image shifts on the page or starts
and stops at irregular intervals
●
Verify that the ADF document-detect-
sensor (PS2) and leading-edge-sensor
(PS1) flags move freely. See
“Document-detect sensor (PS2)” on
page 68, “Leading-edge sensor (PS1)”
on page 68, and “ADF components”
on page 56.
Unexpected image
Unexpected images when using the
ADF to make copies.
●
Verify that there is not any media left
on the glass from a previous copy job.
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7 Troubleshooting 139
Media troubleshooting
Media defects can cause jams and image defects. If the previously described conditions are
corrected and the printing problem is not corrected, continue to investigate the media as the
source of the defect.
Problems with print media are sometimes difficult to detect. To determine if you are using the
correct media type, see the Print Media Guide for the HP LaserJet printer family.
When determining the cause of a MFP failure, a distinction must be made between problems that
relate to the MFP itself and those that involve print media. Often a problem that seems to be
related to the MFP is actually a matter of poor print-media selection or handling. To determine
whether a problem is caused by the MFP or by the media, try these simple steps to remedy the
situation:
●
●
Turn the media over in the tray to print on the reverse side.
Rotate sheets 180 degrees (end-to-end) to feed with a different leading edge.
If the symptoms cease, or change in some way, assume that the problems are caused by the
print media.
Isolate a paper path
Use the straightest paper path
Some problems can be avoided by using the straightest available paper path.
Isolate the source of the jam
Define the source of the media that jams.
Determine where media jams occur
Check where media stops when a jam occurs.
Is the MFP is misfeeding or creating multifeed jams
The following are some possible causes of misfeeding or multifeed jams:
●
●
●
The media might be too heavy or too light.
The paper might be too smooth.
The customer might be attempting to print embossed paper, preprinted forms, or perforated
paper that does not meet HP specifications.
●
The paper might be loaded incorrectly. Turn over the sheets in the paper tray to determine if
in-ream curl is causing misfeeding.
●
●
The customer might be fanning media before loading it into the tray.
The customer might be adding media in small amounts. Do not add small amounts of media
to a stack that is already loaded, and do not mix types of media in the tray.
●
The MFP or media storage environment might be too humid or too dry.
Hint
For more information about media troubleshooting, see the HP LaserJet 4100mfp use guide.
140 Troubleshooting
C9148-90909
Isolate a media brand
If the MFP jams with only one brand of media:
●
●
Try switching media brands.
If the paper ream in use appears to be old, open a fresh ream of the same paper and load it
properly into the MFP. If the problem disappears, investigate storage and handling
conditions.
Isolate a media type
When jams and other problems occur frequently, it is often because the customer is using a
special paper. Customers must only use print media that conforms to all Hewlett-Packard
specifications, and should always test media before purchasing large quantities. Media should
be tested before storage to verify quality printing results. Then, if problems arise, storage or
handling conditions can isolate the most likely cause. Some types of media that might cause
problems are:
●
●
●
●
●
●
●
●
●
●
adhesive labels
envelopes
transparencies
preprinted forms and letterhead
embossed media
perforated paper
chemically treated paper
synthetic paper
coated paper
other special media
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7 Troubleshooting 141
8
Parts and diagrams
Ordering parts, supplies and getting support . . . . . . . . . . . . . . . . . . . 144
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Related documentation and software . . . . . . . . . . . . . . . . . . . . . . 144
Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Common hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
HP Laserjet 4100 differences . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
How to use the parts lists and diagrams . . . . . . . . . . . . . . . . . . . . . . . 147
Parts lists and diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Scan unit (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Scan unit (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Glass, formatter, CPB, and cables . . . . . . . . . . . . . . . . . . . . . . . . 156
ADF unit (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
ADF unit (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
C9148-90909
8 Parts and diagrams 143
Ordering parts, supplies and getting support
Parts
Order replacement parts from the following website:
http://www.hp.com/ssg/parts/direct_order.html
Related documentation and software
Order documentation and software from the sites listed in table 24. Some documentation and
software are available at the listed websites.
Support
Table 24. Technical support websites
HP Connect Online
http://www.connect-online.hp.com
(for HP partners)
HP Connect Online is an Internet site that is created
exclusively for our partners. You can easily find all the HP
information that you need for your daily business. And you
HP Customer Care Online
Software drivers, support
documentation, and answers to
frequently asked questions
http://www.hp.com
Select your country or region in the “select a country or
region” field located at the top right corner of the page.
Select the support block.
HP Technical Training
Classes and schedules
USA: http://www.partner.americas.hp.com
Canada: http://www.canada.hp.com
Asia: http://partnercare.asiapac.hp.com
Latin America: http://www.conecta.latinamerica.hp.com
Parts
Parts information
http://partsurfer.hp.com
or
http://www.hp.com/hps/parts/
HP provides free telephone support during the product warranty period. When you call, you will
be connected to a responsive team waiting to help you. For the number you should call in your
country or region, see the support sheet that came in the box with your product. Before calling
have the following information available:
●
●
Product name (for example HP LaserJet 4101mfp)
Product serial number (found on the underside of the control panel door on the
HP 4100/4101mfp series printers)
●
The date of purchase of your product and a description of the problem you are experiencing
Test your software installation. Attempt to print a test page from your software program. Try
reinstalling the software. If reinstalling the software does not correct the problem, see the
Readme file on the CD-ROM that came with your product. Or call the phone number for your
country or region listed on the support sheet that came in the box with your product. You can also
find answers to frequently asked questions at the following websites:
●
●
htpp//:www.hp.com/support/lj4100mfp or
htpp//:www.hp.com/support/lj4101mfp
144 Parts and diagrams
C9148-90909
Accessories
The following items are available through your local authorized HP dealer. To find a dealer near
you, call the HP Customer Information Center at (1)(800) 752-0900.
Hint
Optional 2-MB and 4-MB Flash DIMMs are available for the HP 4100 LaserJet series printer. Do
not install these DIMMs in the HP 4100mfp or the 4101mfp. These MFP models contain a hard
drive and will ignore the optional Flash DIMMs.
Table 25. Accessories and supplies
Description
Part no.
Product no.
SDRAM DIMM
4 MB
8 MB
C4140-67901
C7842-67901
C7843-67901
C7845-67901
Q1887-67901
C9121-67901
C4140A
C4141A
C4142A
C4143A
C3913A
C9121A
J6057A
16 MB (CPB factory default)
32 MB
64 MB (formatter factory default)
128 MB
615N 10/100 Enhanced Input Output card J6057-69001
WARNING!
The copy processor board (CPB) will only support the
16-MB SDRAM DIMM. Only use the 16-MB SDRAM
DIMM part number C4142-67901 on the CPB.
Envelope feeder
C8053-69002
C8053B
500-sheet media input tray
Duplex printing accessory
Digital sending software
C8055-67901
C8054-69001
not applicable
C8055A
C8054A
C7140A
Hard disk; 5 gigabytes (GIG) or larger
without firmware
J6054-61003
J6054A
HP LaserJet 4100mfp service training kit C9148-67903
Consumables
Table 26. Consumables
Description
Product no.
HPM1120
HPJ1124
C8061A
HP multipurpose paper
HP LaserJet paper
Toner cartridge (6000 page)
Toner cartridge (10000 page)
C8061X
C9148-90909
8 Parts and diagrams 145
Common hardware
The product has six common fasteners. See table 27 for a description of these screw types.
Table 27. Screws used in the ADF unit and scan unit
Description
Part no.
Screw, M4x8, self-tapping truss head
Screw, M4x10, self-tapping pan head
Screw, M4x12, self-tapping pan head
Screw, M3x8, with washer
XB4-7400-809CN
XB4-7401-009CN
XB4-7401-207CN
XA4-1238-000CN
XA9-0773-000 CN
0515-2908-000CN
Screw, M4x12
Screw, M3x0.5, copy processor board
HP Laserjet 4100 differences
The HP LaserJet 4100mfp and the HP LaserJet 4101mfp are based on the HP 4100 series
printer. See table 28 for a list of major differences between the HP 4100 series printer and the
HP LaserJet 4100/4101mfp products.
Table 28. HP LaserJet 4100 differences
HP LaserJet 4100
HP LaserJet 4100/4101mfp
Control cover PCB assembly
RG5-5372-040CN
Not used on the HP 4100/4101mfp products
Not used on the HP 4100 LaserJet series printer
Not used on the HP 4100 LaserJet series printer
Not used on the HP 4100 LaserJet series printer
Not used on the HP 4100 LaserJet series printer
Not used on the HP 4100 LaserJet series printer
Not used on the HP 4100 LaserJet series printer
Not used on the HP 4100 LaserJet series printer
Not used on the HP 4100 LaserJet series printer
Connector PCB
RG5-6534-000CN
See “Top-cover assembly” on page 150.
Rod
RB2-8749-000CN
See “Top-cover assembly” on page 150.
Panel cable
RG5-6644-000CN
See “Top-cover assembly” on page 150.
Spring holder, upper
RB2-8754-000CN
See “Top-cover assembly” on page 150.
Spring holder, lower
RB2-8755-000CN
See “Top-cover assembly” on page 150.
Handle, face-up
RB2-8751-000CN
See “Covers” on page 148.
Cover, front assembly
RG5-5298-000CN
See “Covers” on page 148.
Cover, key
C9148-4000X
See “Covers” on page 148.
146 Parts and diagrams
C9148-90909
How to use the parts lists and diagrams
The figures in this chapter illustrate the major subassemblies in the MFP and their component
parts. A table (part number list) follows each exploded assembly diagram. Each table lists the
reference designator, the associated part number for the item, and a description of the part.
Parts that have no reference designator or part number are not field-replaceable units (FRUs)
and cannot be ordered.
CAUTION
While looking for a MFP electrical component part number, pay careful attention to the voltage
listed in the description column to ensure that the component part number selected is for the
correct model of the printer.
C9148-90909
8 Parts and diagrams 147
Table 29. Covers
Part Number
Description
Handle, face-up
Cover, side left
Cover, side right
Reference
1; Figure 95
2; Figure 95
3; Figure 95
4; Figure 95
RB2-8751-000CN
RB2-8757-000CN
RB2-8758-000CN
C9148-40001
C9148-40002
C9148-40003
C9148-40004
C9148-40005
C9148-40006
C9148-40007
C9148-40008
Cover, key English
Cover, key French
Cover, key Italian
Cover, key German
Cover, key Spanish
Cover, key Dutch
Cover, key Danish
Cover, key Finish
RG5-5298-000CN
Cover, front assembly
5; Figure 95
C9148-90909
8 Parts and diagrams 149
Table 30. Top-cover assembly
Part Number
Description
Reference
1; Figure 96
1; Figure 96
2; Figure 96
3; Figure 96
4; Figure 96
5; Figure 96
6; Figure 96
7; Figure 96
8; Figure 96
RG5-6563-000CN
C9148-69002
Control-panel assembly
Exchange Control-panel assembly
Rod
RB2-8749-000CN
RB2-8754-000CN
RB2-8755-000CN
RB2-8748-000CN
RG5-6644-000CN
RG5-6534-000CN
RB2-8764-000CN
Spring holder, upper
Spring holder, lower
Frame, upper
Panel cable
Connector PCB assembly
Spring, tension
C9148-90909
8 Parts and diagrams 151
Table 31. Scan unit (1 of 2)
Part Number
Description
Reference
1; Figure 97
2; Figure 97
RH7-3074-000CN
RG1-4124-000CN
Lamp, scanner
Optical unit (comes with the scanning lamp and ribbon
cable)
RA2-2964-000CN
RS1-2417-000CN
RG1-4131-000CN
Belt, timing
3; Figure 97
4; Figure 97
5; Figure 97
Spring, Tension (tension spring for optic-unit drive belt)
Pulley, carriage assembly (optic-unit drive-belt tension
bracket)
RH7-1511-000CN
RA2-2955-000CN
RH2-5517-000CN
RA2-2947-000CN
RA2-2948-000CN
RH2-5476-000CN
RF1-4169-000CN
RA2-2961-000CN
Fan
6; Figure 97
7; Figure 97
8; Figure 97
9; Figure 97
10; Figure 97
11; Figure 97
12; Figure 97
13; Figure 97
Filter, air
Cable, inlet
Lever. lock
Holder, lock
Ribbon cable (optic scan unit)
Fan cage
Fan duct
C9148-90909
8 Parts and diagrams 153
Table 32. Scan unit (2 of 2)
Part Number
Description
Reference
1; Figure 98
2; Figure 98
3; Figure 98
RG1-4120-000CN
RG1-4122-000CN
RG1-4175-000CN
ADF door-open sensor assembly (PS10)
Scan-unit motor assembly (optic unit drive gear/motor)
Power supply with veristor cover
(does not include top shield)
RH7-3075-000CN
RG1-4123-000CN
RA2-2940-000CN
RH2-5513-000CN
RH2-5515-000CN
RH2-5516-000CN
VD7-0041-251CN
RH2-5550-000CN
VD7-0644-001CN
RA2-2949-000CN
RA2-2943-000CN
Inverter control PCB assembly
Scanner controller PCB
4; Figure 98
5; Figure 98
7; Figure 98
8; Figure 98
9; Figure 98
10; Figure 98
11; Figure 98
12; Figure 98
13; Figure 98
14; Figure 98
Cable, control panel (J1210)
Cable, inverter controller (J1202)
Cable, power
Fuse, inverter controller
Veristor-cover (in the power supply)
Fuse, power supply
Plate, guide upper (optic unit ribbon cable clip)
Plate, guide lower (optic unit ribbon cable clip)
C9148-90909
8 Parts and diagrams 155
Table 33. Glass, formatter, CPB, high-speed copy connect cable, and power cord
Part Number
RG1-4127-000CN
C7844-67901
Description
Reference
1; Figure 99
2; Figure 99
Glass assembly
Formatter assembly, 4100mfp and 4101mfp without hard
disk, DIMMS, or JetDirect card
C9168-67911
C9168-67902
C8541-67901
5969-8960
DIMM, firmware formatter
Not shown
Not shown
3; Figure 99
4; Figure 99
5; Figure 99
DIMM, firmware CPB (flash)
Copy processor board (CPB) with faceplate
High-speed copy connect cable
C9148-60102
Power cable jumper (scan unit to print unit jumper)
Note
To find the part numbers for a hard disk, memory DIMMs, JetDirect card, or other accessories,
see “Accessories and supplies” on page 145.
C9148-90909
8 Parts and diagrams 157
Table 34. ADF unit (1 of 2)
Part Number
Description
Reference
RG5-6549-000CN
ADF unit (entire assembly) Does not include the ADF input
tray (RG5-6579-000CN)
C9148-69001
Exchange ADF (entire assembly) Does not include the ADF
input tray (RG5-6579-000CN)
RG5-6579-000CN
RB2-8795-000CN
RB2-8793-000CN
RF5-3804-000CN
ADF input tray
1; Figure 100
2; Figure 100
3; Figure 100
4; Figure 100
White backboard sheet
Mylar sheet, clear
Mylar-sheet holder
Note
Only replace the entire ADF unit if all attempts to troubleshoot the unit at a component level have
failed or if the ADF unit component that has failed is not a service part (it has no part number).
See “Troubleshooting” on page 109.
C9148-90909
8 Parts and diagrams 159
Table 35. ADF unit (2 of 2)
Part Number
Description
Reference
1; Figure 101
2; Figure 101
3; Figure 101
4; Figure 101
5; Figure 101
RF5-3808-000CN
RS6-2572-000CN
RB2-8769-0000CN
RG5-6583-000CN
RB2-8781-000CN
Separation-pad assembly
Spring, compression
Roller, pickup
Roller, separation
Cover, rollers
C9148-90909
8 Parts and diagrams 161
Alphabetical parts list
Table 36. Alphabetical parts list
Part Number
Description
Ref.
RG1-4120-000CN
RG5-6579-000CN
RG5-6549-000CN
ADF door-open sensor assembly (PS10)
ADF input tray
1; Figure 98
1; Figure 100
ADF unit (entire assembly) Does not include
the ADF input tray (RG5-6579-000CN)
RA2-2964-000CN
RA2-2940-000CN
RH2-5513-000CN
RH2-5517-000CN
RH2-5515-000CN
RH2-5516-000CN
RG5-6534-000CN
RG5-6563-000CN
C8541-67901
Belt, timing
6; Figure 98
7; Figure 98
8; Figure 97
8; Figure 98
9; Figure 98
7; Figure 96
1; Figure 96
Cable guide (for the scanning lamp cable)
Cable, control panel (J1210)
Cable, inlet
Cable, inverter controller (J1202)
Cable, power
Connector PCB assembly
Control-panel assembly
Copy processor board (CPB) with faceplate 3; Figure 99
RG5-5298-000CN
Cover, front assembly
5; Figure 95
4; Figure 95
C9148-40001
C9148-40002
C9148-40003
C9148-40004
C9148-40005
C9148-40006
C9148-40007
C9148-40008
Cover, key English
Cover, key French
Cover, key Italian
Cover, key German
Cover, key Spanish
Cover, key Dutch
Cover, key Danish
Cover, key Finish
RB2-8781-000CN
RB2-8757-000CN
RB2-8758-000CN
C9168-67901
Cover, rollers
Cover, side left
Cover, side right
DIMM, firmware CPB (flash)
DIMM, firmware formatter
Fan
5; Figure 101
2; Figure 95
3; Figure 95
Not shown
C9147-679020
Not shown
RH7-1511-000CN
RF1-4169-000CN
RA2-2961-000CN
RA2-2955-000CN
C7844-67109
6; Figure 97
12; Figure 97
13; Figure 97
7; Figure 97
Fan cage
Fan duct
Filter, air
Formatter assembly, 4100mfp and 4101mfp 2; Figure 99
without hard disk, DIMMS, or JetDirect card
RB2-8748-000CN
VD7-0644-001CN
VD7-0041-251CN
RG1-4127-000CN
RB2-8751-000CN
5969-8660
Frame, upper
5; Figure 96
12; Figure 98
10; Figure 98
1; Figure 99
1; Figure 95
4; Figure 99
10; Figure 97
4; Figure 98
1; Figure 97
9; Figure 97
3; Figure 100
Fuse power supply
Fuse, inverter controller
Glass assembly
Handle, face-up
High-speed copy connect cable
Holder, lock
RA2-2948-000CN
RH7-3075-000CN
RH7-3074-000CN
RA2-2947-000CN
RB2-8793-000CN
Inverter control PCB assembly
Lamp, scanner
Lever. lock
Mylar sheet, clear
162 Parts and diagrams
C9148-90909
Table 36. Alphabetical parts list (continued)
Part Number
Description
Mylar-sheet holder
Ref.
RF5-3804-000CN
RG1-4124-000CN
4; Figure 100
Optical unit (comes with the scanning lamp 2; Figure 97
and ribbon cable)
RG5-6644-000CN
RA2-2943-000CN
RA2-2949-000CN
C9148-60102
Panel cable
6; Figure 96
14; Figure 98
13; Figure 98
5; Figure 99
Plate, Guide lower
Plate, Guide upper
Power cable jumper (scan unit to print unit
jumper)
RH1-4175-000CN
RG1-4131-000CN
Power supply with veristor cover
(does not include top shield)
3; Figure 98
5; Figure 97
Pulley, carriage assembly (optic-unit drive-
belt tension bracket)
RH2-5476-000CN
RB2-8749-000CN
RB2-8769-0000CN
RG5-6583-000CN
RG1-4123-000CN
RG1-4122-000CN
Ribbon cable (optic scan unit)
Rod
11; Figure 97
2; Figure 96
3; Figure 101
4; Figure 101
5; Figure 98
2; Figure 98
Roller, pickup
Roller, separation
Scanner controller PCB
Scan-unit motor assembly (optic unit drive
gear/motor)
RF5-3808-000CN
RB2-8755-000CN
RB2-8754-000CN
RS6-2572-000CN
RB2-8764-000CN
RS1-2417-000CN
Separation-pad assembly
Spring holder, lower
Spring holder, upper
Spring, compression
Spring, tension
1; Figure 101
4; Figure 96
3; Figure 96
2; Figure 101
8; Figure 96
Spring, Tension (tension spring for optic-unit 4; Figure 97
drive belt)
RH2-5550-000CN
RB2-8795-000CN
Veristor-cover (in the power supply)
White backboard sheet
11; Figure 98
2; Figure 100
C9148-90909
8 Parts and diagrams 163
Numerical parts list
Table 37. Numerical parts list
Part Number
5969-8660
Description
Ref.
High-speed copy connect cable
4; Figure 99
C7844-67901
Formatter assembly, 4100mfp and 4101mfp 2; Figure 99
without hard disk, DIMMS, or JetDirect card
C8541-67901
C9147-67920
Copy processor board (CPB) with faceplate 3; Figure 99
DIMM, firmware formatter
Not shown
C9148-40001
C9148-40002
C9148-40003
C9148-40004
C9148-40005
C9148-40006
C9148-40007
C9148-40008
Cover, key English
Cover, key French
Cover, key Italian
Cover, key German
Cover, key Spanish
Cover, key Dutch
Cover, key Danish
Cover, key Finish
4; Figure 95
C9148-60102
Power cable jumper (scan unit to print unit
jumper)
5; Figure 99
C9168-67901
DIMM, firmware CPB (flash)
Not shown
RA2-2940-000CN
RA2-2943-000CN
Cable guide (for the scanning lamp cable)
6; Figure 98
14; Figure 98
Plate, Guide lower (optic unit ribbon cable
clip)
RA2-2947-000CN
RA2-2948-000CN
RA2-2949-000CN
Lever. lock
9; Figure 97
10; Figure 97
13; Figure 98
Holder, lock
Plate, Guide upper (optic unit ribbon cable
clip)
RA2-2955-000CN
RA2-2961-000CN
RA2-2964-000CN
RB2-8748-000CN
RB2-8749-000CN
RB2-8751-000CN
RB2-8754-000CN
RB2-8755-000CN
RB2-8757-000CN
RB2-8758-000CN
RB2-8764-000CN
RB2-8769-0000CN
RB2-8781-000CN
RB2-8793-000CN
RB2-8795-000CN
RF1-4169-000CN
RF5-3804-000CN
RF5-3808-000CN
RG1-4120-000CN
RG1-4122-000CN
Filter, air
7; Figure 97
13; Figure 97
3; Figure 97
5; Figure 96
2; Figure 96
1; Figure 95
3; Figure 96
4; Figure 96
2; Figure 95
3; Figure 95
8; Figure 96
3; Figure 101
5; Figure 101
3; Figure 100
2; Figure 100
12; Figure 97
4; Figure 100
1; Figure 101
1; Figure 98
2; Figure 98
Fan duct
Belt, timing
Frame, upper
Rod
Handle, face-up
Spring holder, upper
Spring holder, lower
Cover, side left
Cover, side right
Spring, tension
Roller, pickup
Cover, rollers
Mylar sheet, clear
White backboard sheet
Fan cage
Mylar-sheet holder
Separation-pad assembly
ADF door-open sensor assembly (PS10)
Scan-unit motor assembly (optic unit drive
gear/motor)
RG1-4123-000CN
Scanner controller PCB
5; Figure 98
164 Parts and diagrams
C9148-90909
Table 37. Numerical parts list (continued)
Part Number
Description
Ref.
RG1-4124-000CN
Optical unit (comes with the scanning lamp 2; Figure 97
and ribbon cable)
RG1-4127-000CN
RG1-4131-000CN
Glass assembly
1; Figure 99
5; Figure 97
Pulley, carriage assembly (optic-unit drive-
belt tension bracket)
RG5-5298-000CN
RG5-6534-000CN
RG5-6549-000CN
Cover, front assembly
5; Figure 95
7; Figure 96
Connector PCB assembly
ADF unit (entire assembly) Does not include
the ADF input tray (RG5-6579-000CN)
RG5-6563-000CN
RG5-6579-000CN
RG5-6583-000CN
RG5-6644-000CN
RH1-4175-000CN
Control-panel assembly
ADF input tray
1; Figure 96
1; Figure 100
4; Figure 101
6; Figure 96
3; Figure 98
Roller, separation
Panel cable
Power supply with veristor cover
(does not include top shield)
RH2-5476-000CN
RH2-5513-000CN
RH2-5515-000CN
RH2-5516-000CN
RH2-5517-000CN
RH2-5550-000CN
RH7-1511-000CN
RH7-3074-000CN
RH7-3075-000CN
RS1-2417-000CN
Ribbon cable (optic scan unit)
Cable, control panel (J1210)
Cable, inverter controller (J1202)
Cable, power
11; Figure 97
7; Figure 98
8; Figure 98
9; Figure 98
8; Figure 97
11; Figure 98
6; Figure 97
1; Figure 97
4; Figure 98
Cable, inlet
Veristor-cover (in the power supply)
Fan
Lamp, scanner
Inverter control PCB assembly
Spring, Tension (tension spring for optic-unit 4; Figure 97
drive belt)
RS6-2572-000CN
VD7-0041-251CN
VD7-0644-001CN
Spring, compression
Fuse, inverter controller
Fuse, power supply
2; Figure 101
10; Figure 98
12; Figure 98
C9148-90909
8 Parts and diagrams 165
166 Parts and diagrams
C9148-90909
Index
calibration
automatic 47
Symbols
? (Help) key 30
manual 48
cancelling jobs 30
capacity, trays 15
cartridge
A
accessories
included 14
ordering 145
part number 145
removing 79
replacing 40
acclimation, environment 112
ADF (automatic document feeder)
blank pages, troubleshooting 138
cable, locating 21
troubleshooting 137
CCD (charged couple device)
connector 62
operations 52, 53, 66
voltage 63
CD-ROM, support assistant 25
connector 62
operations 52, 53, 66
voltage 63
checks, diagnostic 126
cleaning
calibrating 47, 48
capacity 14
cleaning 36, 37
components 56
connectors 62
diagrams 158, 160
door-open sensor (PS10) 55, 98, 121
error messages 123
features 15
input tray, removing 73
jams 128, 129
page 37, 121
procedures 36
locating 20, 24
Clear (C) key 30
clear mylar strip, cleaning 36, 37
clearing counts 127
cold reset 45
components, MFP 54
configuration page 130
configurations, product 14, 146
configure device menu 32
connectors, scanner controller board 62
consumables, ordering 145
control panel
media specifications 18
motor circuit 61, 63
noise specifications 17
operations 52, 61, 67
output bin, locating 21
paper-path test 126
part numbers 159, 161
pickup roller, removing 74
removing unit 78
sensors 68
separation pad, removing 77
separation roller, removing 76
size specifications 16
skew specifications 17
user-replaceable parts 39
using 28
cleaning 36
connectors 62
copy settings 31
door, removing 79
error messages 120
event log 117
keys 30
locating 20
menu map 33
menus 32
modes 30
navigation 31
replacing 19
settings, overriding 129
status bar 31
agreements, service 25
ASIC operations 57, 59
assemblies
alphabetical list 162
diagrams and part numbers 147
numerical list 164
ordering 144
removing and replacing 24, 70
user-replaceable 39
Attention light 30
auto-cleaning page 37, 121
automatic document feeder. See ADF
testing 126
troubleshooting 114, 116
copy processor board (CPB)
LEDs 59, 124
B
memory upgrades 145
operations 52, 57
removing 83
billing, usage page 134
bin, output 20
blank pages, troubleshooting 138
buttons, control panel 30
troubleshooting 121
C
C (Clear) key 30
cables, part numbers 145
C9148-90909
Index 167
copying
control panel keys 30, 31
downloading
firmware 41
features 15
software 25
operations overview 52
resolution 15, 16
skew specifications 17
speed 15, 16
status bar 31
troubleshooting 115, 123
using ADF 28
draft mode 137
drive gear/motor assembly, removing 99
drivers, printer 25
DSP operations 57, 60
duplex printing accessory, part number 145
duty cycle 15
using glass 29
E
country of origin 19
counts, clearing 127
covers
EconoMode 137
electrostatic discharge (ESD) 70
enlarging copy size 15, 30
envelope feeder 145
error messages
cleaning 36
control panel, removing 79
diagrams 148
formatter-cage, removing 87
left-side, removing 84
part numbers 149
right-side, removing 82
top 91, 150
control panel 120
event log 117
firmware updates 44
language settings 117
ESD (electrostatic discharge) 70
event log
CPB (copy processor board)
LEDs 59, 124
clearing 127
exposure system operations 52
memory upgrades 145
operations 52, 57
removing 83
F
troubleshooting 121
critical error messages 120
customer support 25, 144
fan, intake
connector 62
filter 86
locating 55
removing 106
troubleshooting 116, 122
voltage 63
D
Data light 30
default settings
firmware updates 41
menu map 33
restoring 30
fasteners 71, 146
features 15
field replaceable units (FRUs)
alphabetical list 162
numerical list 164
ordering 144
part numbers 147
removing and replacing 24, 70
user-replaceable 39
filter, intake fan 86
firmware updates
configuration page 130
downloading 41
troubleshooting 44, 119
Windows parallel connection procedures 43
flatbed
delay jams 68
delivery roller, ADF 67
diagnostics 32, 126
digital sending
configuration page 130
resolution 16
software 14, 145
dimensions, specifications 16
DIMMs
copy processor board 57
part numbers 145
directory structure page 135
disconnecting power supply 70
disk
file directory page 135
initialization 45
locating 21
components 55, 126
removing 90
flatbed intake fan
connector 62
display. See control panel
documentation 14, 144
document-delay jams 68
document-detect sensor (PS2)
operations 68
filter 86
locating 55
operations 61, 68
removing 106
troubleshooting 116, 122
voltage 63
testing 126
document-stationary jams 68
door, control panel 79
door-open sensor (PS10)
connector 62
flowchart, troubleshooting 113
formatter
locating 55
operations 68
removing 98
troubleshooting 121
cage, removing 87
diagram 156
operations 57
part number 157
168 Index
C9148-90909
FPGA operations 57, 60
FRUs (field replaceable units)
alphabetical list 162
JetDirect card
locating 21
replacing 40
numerical list 164
JetDirect page 132
ordering 144
part numbers 147
removing and replacing 24, 70
user-replaceable 39
K
keys, control panel 30
fuse, overcurrent protection 63
L
lamp. See scanning lamp
language, control panel 117
LaserJet 4000 comparison 146
leading edge calibration 48, 49
leading-edge sensor (PS1)
operations 68
testing 126
LEDs
control panel 30, 126
copy processor board (CPB) 59, 124
left-side cover, removing 84
lights
G
glass
calibrating scanner 48, 49
cleaning 36
copying from 29
diagram 156
media specifications 18
part number 157
removing 92
scanning operations 53
troubleshooting 123
copy processor board (CPB) 59, 124
lines, troubleshooting 138, 139
lock, optical-unit 20
H
hard disk
file directory page 135
initialization 45
low-voltage components 63
locating 21
Help key 30
horizontal lines, troubleshooting 138
HP JetDirect card
locating 21
replacing 40
HP JetDirect page 132
HP LaserJet 4000 comparison 146
HP Technical Training 144
HP Web JetAdmin firmware updates 42
M
maintenance
agreements 25
cleaning procedures 36
counts, clearing 127
kits 39
manuals 14, 144
media
capacity 15
HP, part numbers 145
jams 68, 128
misfeeds 140
I
image quality
specifications 15, 16
troubleshooting 136, 138
information pages 114, 130
initializing hard drive 45
input trays. See trays
intake fan
sizes supported 18
trays. See trays
troubleshooting 112, 140
memory
access door, locating 21
configuration page 130
copy processor board components 57
included 14
connector 62
filter 86
locating 55
operations 61, 68
removing 106
troubleshooting 116, 122
voltage 63
menus
control panel 32, 33
service 127
messages
intermediate PCB
connector 62
control panel 120
event log 117
operations 63
inverter PCB
firmware updates 44
language settings 117
MFP, defined 14
MIPS processor operations 57, 60
misfeeds 128, 140
model comparison 14, 146
model number 19
motors
connector 62
operations 66
removing 103
testing 126
troubleshooting 123
operations 61
optical unit, removing 99
testing 126
J
jams
detection operations 68
misfeeds 140
voltage 63
multifeeds 128, 140
multifunction printer (MFP), defined 14
troubleshooting 128
JetAdmin firmware updates 42
C9148-90909
Index 169
mylar strip, cleaning 36, 37
pickup roller, ADF
diagrams 160
operations 67, 68
part number 161, 163, 164
removing 74
N
networks, firmware updates 42, 43
numbers, part
PIN, service menu 127
pliers 70
power supply
alphabetical list 162
numerical list 164
NVRAM initialization 46
block diagram 64
connectors 21, 62
disconnecting 70
locating 55
O
operations
ADF document-feed system 67
component diagrams 54
copy processor board (CPB) 57
image processing 58
intermediate PCB 63
motor circuits 61
optical unit 65
overview 52
power supply 63
operations 63
removing 101
troubleshooting 114, 116
PowerSave mode 30, 61
ppm (pages per minute) 15, 16
print cartridge
part number 145
removing 79
replacing 40
scanner controller board 61
optical unit
troubleshooting 137
print quality
components 54, 55
connectors 62
drive belt tension 138
drive gear/motor assembly, removing 99
lock 20
motor circuit 61
operations 52, 65
reinstalling 97
troubleshooting 136, 138
print unit
locating 24
top cover, removing 91
user-replaceable parts 40
printer drivers 25
production code 19
connector 62
removing 95
troubleshooting 122
voltage 63
locating 55
ordering parts 144
output bin 20
operations 68
removing 98
output door, straight-through 21
output quality
troubleshooting 121
specifications 15, 16
troubleshooting 136, 138
overcurrent protection 63
Q
quality
specifications 15, 16
troubleshooting 136, 138
P
pages per minute (ppm) 15, 16
paper
R
RAM
capacity 15
HP, part numbers 145
jams 68, 128
copy processor board operations 57
part numbers 145
Ready light 30
misfeeds 140
ready mode 30, 114
remote firmware updates (RFUs)
configuration page 130
HP Web JetAdmin procedures 42
installation 41
troubleshooting 44, 119
removing parts 70
sizes supported 18
trays. See trays
troubleshooting 112, 140
paper-path test, ADF 126
parts
alphabetical list 162
assembly diagrams 147
numerical list 164
ordering 144
replacement parts
removing and replacing 24, 70
user-replaceable 39
paused mode 30
pay-per-page 134
PCI bridge operations 57, 60
Perform Printer Maintenance message 39, 127
phone numbers 25, 144
alphabetical list 162
assembly diagrams 147
numerical list 164
ordering 144
removing and replacing 24, 70
user-replaceable 39
Reset key 30
resolution specifications 15, 16
170 Index
C9148-90909
RFUs (remote firmware updates)
configuration page 130
HP Web JetAdmin procedures 42
installation 41
serial number 19, 127
service
agreements 25
approach 24
troubleshooting 44, 119
Windows parallel connection procedures 43
right-side cover, removing 82
rollers
HP LaserJet 4000 comparison 146
manuals 14
menu 32, 127
removing and replacing parts 70, 72
tools, required 70
user-replaceable parts 39
settings, default
diagrams 56, 160
operations 67, 68
part numbers 161
pickup, removing 74
separation, removing 76
user-replaceable 39
firmware updates 41
menu map 33
restoring 30
size specifications
media 18
MFP 16
skew
specifications 17
software
digital sending 14, 145
troubleshooting 144
space requirements 16
specifications
S
scan unit
diagrams 152, 154
left-side cover, removing 84
locating 24
part numbers 153, 155
power supply, removing 101
removing 89
right-side cover, removing 82
specifications 16
scanner controller board
components 54
connectors 62
features 15
media 15, 18
physical 16
skew 17
copy processor board (CPB) signals 57, 58
locating 55
operations 52, 61
optical unit activation 65
removing 104
speed specifications 15, 16
SRAM
copy processor board operations 57
part numbers 145
Start key 30
static protection 70
stationary jams 68
status
bar, control panel 31
messages 120
page, supplies 133
Stop key 30
straight-through output door 21
supplies status page 133
voltage 63
scanning
calibration 47
control panel keys 30
operations overview 52
resolution 15, 16
skew specifications 17
speed 15, 16
status bar 31
troubleshooting 123
using ADF 28
using glass 29
scanning lamp
T
locating 55
operations 52, 65, 66
removing 93
technical support 25, 144
tests 126
testing 126
troubleshooting 123
screwdrivers 70
screws
theory of operations. See operations
toner cartridge. See print cartridge
tools, required 70
top cover
part numbers 146
self-tapping, installing 70
types of 71
diagram 150
part numbers 151
sensors
ADF 67, 68
testing 126
trays
separation pad, ADF
diagrams 160
adding 16
ADF input, removing 73
capacity 15
included 14
part numbers 145
operations 67, 68
part number 161, 163, 164
removing 77
separation roller, ADF
diagrams 160
operations 67, 68
part number 161, 163, 165
removing 76
C9148-90909
Index 171
troubleshooting
basic steps 111, 114
configuration page 130
control panel 114, 116
copy processor board (CPB) 121, 124
copying 115
diagnostics 126
error messages 120
file directory page 135
firmware updates 44, 119
flowchart 113
image quality 136, 138
information pages 114, 130
installation environment 112
inverter PCB 123
jams 128
JetDirect page 132
lines 138, 139
media 140
multifeeds 140
optical unit 122
power 114, 116
print cartridge 137
scanning lamp 123
skew 128, 139
software 144
supplies status page 133
wiring diagrams 142
U
UNIX firmware upgrades 41
unplugging power supply 70
updating firmware
configuration page 130
downloading 41
HP Web JetAdmin procedures 42
troubleshooting 44, 119
Windows parallel connection procedures 43
usage page 134
user-replaceable parts
ADF 78
input tray, ADF 73
maintenance intervals 39
pickup roller 74
separation pad 77
separation roller 76
V
vertical lines, troubleshooting 139
voltage, power supply 63
W
walk-up copying 31
warning messages 120
Web JetAdmin firmware updates 42
websites, HP 25, 144
weight
print cartridge 137
product specifications 16
Windows, firmware updates 43
wiring
diagrams 142
troubleshooting 116
172 Index
C9148-90909
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