HP LaserJet 4100mfp Service Manual

hp LaserJet
4100mfp	4101mfp

service addendum

hp LaserJet 4100mfp series

service addendum

ENERGY STAR®

Copyright Information

© 2002 Hewlett-Packard

Company

All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws.

Publication number

C9148-90909

Second edition, April 2002

Quick reference service PIN code: 04410002

Warranty

The information contained in this document is subject to change without notice.

Hewlett-Packard makes no warranty of any kind with respect to this information. HEWLETT-PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

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.

Trademark Credits

Adobe® , Acrobat® , PostScript™, and the Acrobat logo are either registered trademarks or trademarks of Adobe Systems Incorporated in the United States and/or other countries/regions.

Microsoft® ,MS-DOS, and Windows® are U.S. registered trademarks of Microsoft Corp.

Netscape™ is a U.S. trademark of Netscape Communications Corporation.

TrueType™ is a U.S. trademark of Apple Computer, Inc.

is a U.S. 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 Expandable design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 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

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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 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

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

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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

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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 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 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 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

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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

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Table of contents 7

8 Table of contents

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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 serialand 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

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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.	Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	16
Table 3. ADF/flatbed-unit acoustical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		17
Table 4.	Skew specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	17
Table 5. Supported paper sizes and weights for the ADF . . . . . . . . . . . . . . . . . . . . . . . .		18
Table 6. General cleaning guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		36
Table 7.	User-replaceable parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	39
Table 8. Print-unit maintenance kit parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		40
Table 9. Copy processor board LEDs (initialization sequence) . . . . . . . . . . . . . . . . . . . . .		59
Table 10. Scanner controller board connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		62
Table 11.	Low-voltage components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	63
Table 12. Common fasteners found in the MFP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		71
Table 13.	Parts-removal tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	72
Table 14. Primary steps for troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		111
Table 15.	Basic troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	114
Table 16.	Power malfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	116
Table 17. Firmware-update event-log errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		119
Table 18. Control-panel error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		120
Table 19. Troubleshooting copy processor board LEDs . . . . . . . . . . . . . . . . . . . . . . . . . .		125
Table 20.	Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	127
Table 21. General ADF jam troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		128
Table 22.	Image-quality checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	136
Table 23.	Image defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	138
Table 24. Technical support websites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		144
Table 25. Accessories and supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		145
Table 26.	Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	145
Table 27. Screws used in the ADF unit and scan unit . . . . . . . . . . . . . . . . . . . . . . . . . . . .		146
Table 28. HP LaserJet 4100 differences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		146
Table 29.	Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	149
Table 30.	Top-cover assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	151
Table 31. Scan unit (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		153
Table 32. Scan unit (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		155
Table 33. Glass, formatter, CPB, and cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		157
Table 34. ADF unit (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		159
Table 35. ADF unit (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		161
Table 36. Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		162
Table 37. Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		164

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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

Expandable design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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

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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

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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)
Width	805 mm (31.7 inches)
Weight	26 kg (56.5 pounds)
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)	139 mm/second (5.6 inches/second)
Scanning speed (flatbed mode)	69 mm/second (2.8 inches/second)
Copy speed	25 ppm (letter)
	24 ppm (A4)
Copy resolution	600 by 600 ppi optical
Digital send resolution	600 by 600 ppi optical

16 Product Information

C9148-90909

	Table 3. ADF/flatbed-unit acoustical specifications
	Category	Specification
	Sound Power Level, LWAd	● Scanning: 6.7 dB (A)
	(1 bel = 10 decibels)	● Standby: 5.2 dB (A)
Note	Testing per International Standard Organization (ISO) 9296.
Note	“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	6.0mm (.24 inch) over 220mm
	inches) length---simplex	(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)
Text stretching	1 percent for cut sheet---simplex	None
	1 percent for cut sheet---duplex
	Scan unit
Tolerance	ADF	Glass
Skew	<= 1 percent	<= 1 percent
Leading edge	+/- 2 mm (.08 inch)	+/- 1 mm (.04 inch)
Left margin	+/- 1 mm (.04 inch)	+/- 1 mm (.04 inch)
Parallel (vertical	+/- 0.6 percent	+/- 0.6 percent
and horizontal)
Image length and	+/- 1.2 percent	+/- 1 percent
width

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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
	Letter	216 by 279 mm	50 to 105 g/m2
		(8.5 by 11 inches)	(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
		148.5 by 210 mm	(16 to 36 lb)
		(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:

●letteror 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.	Model and serial number label
Note	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.

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1 Product Information 19

Product overview

Front view

1

2

5

4

3

Figure 2. Product parts (front view; right side)

1automatic document feeder (ADF) input (with sliding media guides)

2ADF cover (lifts for access to the glass)

3control-panel door (provides access to the print cartridge; serial and model numbers are located on a panel underneath the door)

4control panel

5output bin (for printed output and copies)

6

Figure 3. Optical-unit lock (front view; left side)

6 optical-unit lock

20 Product Information

C9148-90909

Back view

8

7

6

3

5

4

Figure 4. Product parts (back view)

1ADF connector cable

2straight-through output door

3power connection (from power source to print unit)

4hard disk

5HP JetDirect card

6memory access door (more than one DIMM can be installed)

7power jumper cable (from print unit to scan unit)

8ADF output bin

1

2

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1 Product Information 21

22 Product Information

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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:

1Isolate the problem to the major system (the host computer, the network and/or server, or MFP major assemblies).

2Determine whether the problem is located in one of the paper-handling devices or in the product engine.

3Troubleshoot 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	automatic document feed (ADF) unit
	2	scan unit
	3	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) [phone]. 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) [phone] in the U.S. or

(1) [phone] in Canada

HP service agreements

Call (1) [phone] in the U.S. or (1) [phone] in Canada.

C9148-90909

2 Service approach 25

26 Service approach

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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

Configure device, diagnostic, and service menus . . . . . . . . . . 32

Menu map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

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.	Using the ADF
Note		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		Place documents in the ADF input tray.
	3		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		After making your selections, press START. Copies are sent to the output bin beneath the
			scan unit.
	5		When the scan is complete, remove the original document from the ADF output.

28 Operation

C9148-90909