Canon PIXMA MG3220 series Service manual

HP LaserJet M1120 MFP Series
Service Manual
HP LaserJet M1120 MFP Series
Service Manual
Copyright and License
Trademark Credits
© 2008 Copyright Hewlett-Packard
Development Company, L.P.
Adobe®, Acrobat®, and PostScript® are
trademarks of Adobe Systems Incorporated.
Reproduction, adaptation, or translation
without prior written permission is prohibited,
except as allowed under the copyright laws.
Microsoft®, Windows®, and Windows NT®
are U.S. registered trademarks of Microsoft
Corporation.
The information contained herein is subject
to change without notice.
UNIX® is a registered trademark of The Open
Group.
The only warranties for HP products and
services are set forth in the express warranty
statements accompanying such products
and services. Nothing herein should be
construed as constituting an additional
warranty. HP shall not be liable for technical
or editorial errors or omissions contained
herein.
Edition 1, 1/2008
Part number: CB537-90945
Table of contents
1 Product information
Quick access to product information .................................................................................................... 2
Product comparison ............................................................................................................................. 3
Product features ................................................................................................................................... 4
Product walkaround .............................................................................................................................. 5
Front view ............................................................................................................................ 5
Back view ............................................................................................................................. 5
Interface ports ...................................................................................................................... 6
Serial number and model number location .......................................................................... 6
Software description ............................................................................................................................. 7
Supported operating systems .............................................................................................. 7
Supported printer drivers ..................................................................................................... 7
Software included with the product ...................................................................................... 7
Easy installation for Windows ............................................................................. 7
Advanced installation .......................................................................................... 8
Macintosh software ............................................................................................. 8
Software for Windows .......................................................................................................................... 9
Embedded Web server (network models only) .................................................................... 9
Status Alerts software .......................................................................................................... 9
Other Windows components and utilities ............................................................................. 9
Software for Macintosh ....................................................................................................................... 10
Embedded Web server (network models only) .................................................................. 10
HP Director ........................................................................................................................ 10
Uninstall software ............................................................................................................................... 11
Windows ............................................................................................................................ 11
Macintosh .......................................................................................................................... 11
Media specifications ........................................................................................................................... 12
Supported paper and print media sizes ............................................................................. 12
Supported paper types and tray capacity .......................................................................... 13
2 Installation
Site preparations ................................................................................................................................ 16
Operating environment ...................................................................................................... 16
Minimum system requirements .......................................................................................... 17
What was in the box ........................................................................................................................... 18
Install input devices ............................................................................................................................ 19
Priority input tray ................................................................................................................ 19
Tray 1 ................................................................................................................................. 20
Install supplies .................................................................................................................................... 21
ENWW
iii
Install the print cartridge .................................................................................................... 21
3 Maintenance
Manage supplies ................................................................................................................................ 24
Life expectancies of supplies ............................................................................................. 24
Check and order supplies .................................................................................................. 24
Store supplies .................................................................................................................... 24
Replace supplies ............................................................................................................... 25
Print cartridge .................................................................................................... 25
HP policy on non-HP supplies ........................................................................................... 26
HP fraud hotline ................................................................................................................. 27
Clean the product ............................................................................................................................... 28
Clean the exterior .............................................................................................................. 28
Clean the flatbed scanner glass ........................................................................................ 28
Clean the lid backing ......................................................................................................... 28
Clean the paper path ......................................................................................................... 29
Management tools .............................................................................................................................. 30
Information pages .............................................................................................................. 30
Embedded Web server ...................................................................................................... 30
Features ............................................................................................................ 31
4 Operational theory
Basic operation ................................................................................................................................... 34
Sequence of operation for the base unit ............................................................................ 34
Scanner functions and operation ........................................................................................................ 36
Scanner functions ............................................................................................................. 36
Scanner operation ............................................................................................................. 37
Internal components (base unit) ......................................................................................................... 38
Engine control system ........................................................................................................................ 39
Laser/scanner system ........................................................................................................................ 41
Pickup/feed/delivery system ............................................................................................................... 42
Image-formation system .................................................................................................................... 43
5 Removal and replacement
Removal and replacement strategy .................................................................................................... 48
Introduction ........................................................................................................................ 48
Removal and replacement warnings, cautions, notes, and tips ........................ 48
Electrostatic discharge ...................................................................................... 49
Required tools ................................................................................................... 49
Before performing service ................................................................................................. 49
After performing service ..................................................................................................... 50
Post-service tests .............................................................................................................. 51
Test 1 (print-quality test) ................................................................................... 51
Test 2 (copy-quality test) ................................................................................... 51
Parts removal order ........................................................................................................... 52
Scanner assembly .............................................................................................................................. 53
Link assemblies and scanner support-frame spring .......................................................... 53
Scanner lid ......................................................................................................................... 56
Control-panel overlay ......................................................................................................... 57
iv
ENWW
Control-panel assembly ..................................................................................................... 58
Scanner assembly ............................................................................................................. 60
Product base ...................................................................................................................................... 65
Print cartridge .................................................................................................................... 65
Separation pad .................................................................................................................. 66
Pickup roller ....................................................................................................................... 67
Scanner cushions .............................................................................................................. 70
Media input tray ................................................................................................................. 71
Transfer roller .................................................................................................................... 73
Side covers ........................................................................................................................ 74
Print-cartridge door ............................................................................................................ 76
Rear cover and fuser cover ............................................................................................... 77
Front cover ......................................................................................................................... 79
Formatter ........................................................................................................................... 81
Power supply ..................................................................................................................... 82
Scanner support frame ...................................................................................................... 86
Laser/scanner assembly .................................................................................................... 89
Main motor ......................................................................................................................... 93
Fuser .................................................................................................................................. 96
Paper-pickup assembly ................................................................................................... 100
Drive-gear assembly and drive belt ................................................................................. 103
6 Problem solve
Problem-solving checklist ................................................................................................................. 106
Control-panel messages .................................................................................................................. 108
Alert and warning messages .......................................................................................... 108
Alert and warning message tables .................................................................. 108
Critical error messages .................................................................................................... 109
Critical error message-tables .......................................................................... 109
Clear jams ........................................................................................................................................ 111
Causes of jams ................................................................................................................ 111
Where to look for jams ..................................................................................................... 112
Clear jams from the input-tray areas ............................................................................... 112
Clear jams from the output bin ......................................................................................... 115
Clear jams from the print-cartridge area .......................................................................... 116
Avoid repeated jams ....................................................................................................... 117
Print problems .................................................................................................................................. 118
Print-quality problems ...................................................................................................... 118
Improve print quality ........................................................................................ 118
Print-quality settings ....................................................................... 118
Identify and correct print defects ..................................................................... 119
Print-quality checklist ...................................................................... 119
General print-quality issues ............................................................ 120
Scan problems ................................................................................................................................. 124
Solve scanned-image problems ...................................................................................... 124
Scan-quality problems ..................................................................................................... 126
Prevent problems ............................................................................................ 126
Solve scan-quality problems ........................................................................... 126
Copy problems ................................................................................................................................. 127
Prevent problems ............................................................................................................. 127
ENWW
v
Image problems ............................................................................................................... 127
Media-handling problems ................................................................................................ 128
Performance problems .................................................................................................... 130
Functional checks ............................................................................................................................. 131
Engine test page .............................................................................................................. 131
Drum rotation test ............................................................................................................ 131
Half self-test functional check .......................................................................................... 132
Perform a half self-test check .......................................................................... 132
Perform other checks ..................................................................................... 132
Heating element check .................................................................................................... 133
High-voltage contacts check ............................................................................................ 133
Check the print-cartridge contacts ................................................................ 133
Check the high-voltage connector assembly .................................................. 134
Service-mode functions .................................................................................................................... 135
NVRAM initialization ........................................................................................................ 135
Super NVRAM initialization .............................................................................................. 135
Secondary service menu ................................................................................................. 135
Problem-solving tools ....................................................................................................................... 137
Product information pages and reports ............................................................................ 137
Configuration page .......................................................................................... 137
Demo page ...................................................................................................... 137
Menu map ........................................................................................................................ 137
Service menu ................................................................................................................... 138
Restore the factory-set defaults ...................................................................... 138
Clean the paper path ....................................................................................... 138
Archive print .................................................................................................... 138
Problem-solving diagrams ................................................................................................................ 140
Repetitive image defects ................................................................................................. 140
Interface ports .................................................................................................................. 141
Formatter connectors ....................................................................................................... 142
ECU connectors ............................................................................................................... 143
Solenoid and motor .......................................................................................................... 144
Rollers .............................................................................................................................. 145
Sensors ............................................................................................................................ 146
Major components ........................................................................................................... 147
PCAs (base unit) .............................................................................................................. 148
Circuit diagram ................................................................................................................. 149
Firmware updates ............................................................................................................................. 150
7 Parts
Ordering information ......................................................................................................................... 152
Supplies and hinge tool .................................................................................................................... 152
Cable and interface accessories ...................................................................................................... 152
Whole-unit replacement ................................................................................................................... 153
Control-panel overlays ..................................................................................................................... 157
Supplementry documentation and support ....................................................................................... 160
Parts lists and diagrams ................................................................................................................... 162
Types of screws ............................................................................................................... 163
Scanner assemblies ......................................................................................................................... 164
Assemblies ....................................................................................................................................... 166
vi
ENWW
External covers and panels .............................................................................................................. 168
Internal components (1 of 3) ............................................................................................................ 170
Internal components (2 of 3) ............................................................................................................ 172
Internal components (3 of 3) ............................................................................................................ 174
Alphabetical parts list ....................................................................................................................... 176
Numerical parts list ........................................................................................................................... 178
Appendix A Service and support
Hewlett-Packard limited warranty statement .................................................................................... 181
Customer self repair warranty service .............................................................................................. 182
Print cartridge limited warranty statement ........................................................................................ 183
Customer support ............................................................................................................................. 184
HP maintenance agreements ........................................................................................................... 184
Repacking the device ...................................................................................................... 184
Extended warranty ........................................................................................................... 184
Appendix B Specifications
Physical specifications ..................................................................................................................... 186
Electrical specifications .................................................................................................................... 186
Power consumption .......................................................................................................................... 186
Environmental specifications ............................................................................................................ 187
Acoustic emissions ........................................................................................................................... 187
Appendix C Regulatory information
FCC compliance ............................................................................................................................... 190
Environmental product stewardship program ................................................................................... 190
Protecting the environment .............................................................................................. 190
Ozone production ............................................................................................................ 190
Power consumption ......................................................................................................... 190
Toner consumption .......................................................................................................... 190
Paper use ........................................................................................................................ 190
Plastics ............................................................................................................................ 191
HP LaserJet print supplies ............................................................................................... 191
Return and recycling instructions ..................................................................................... 191
United States and Puerto Rico ........................................................................ 191
Multiple returns (two to eight cartridges) ........................................ 191
Single returns ................................................................................. 191
Shipping .......................................................................................... 191
Non-US returns ............................................................................................... 192
Paper ............................................................................................................................... 192
Material restrictions .......................................................................................................... 192
Disposal of waste equipment by users in private households in the European Union .... 192
Material Safety Data Sheet (MSDS) ................................................................................ 192
For more information ....................................................................................................... 192
Declaration of conformity .................................................................................................................. 194
Safety statements ............................................................................................................................. 195
Laser safety ..................................................................................................................... 195
Canadian DOC regulations .............................................................................................. 195
EMI statement (Korea) ..................................................................................................... 195
ENWW
vii
Laser statement for Finland ............................................................................................. 196
Substances table (China) ................................................................................................ 196
Index ................................................................................................................................................................. 199
viii
ENWW
List of tables
Table 1-1 Product guides ................................................................................................................................... 2
Table 1-2 Supported paper and print media sizes ........................................................................................... 12
Table 1-3 Supported envelopes and postcards ............................................................................................... 12
Table 1-4 Supported paper types and tray capacity ........................................................................................ 13
Table 4-1 Sequence of operation ..................................................................................................................... 34
Table 4-2 Power-on sequence ......................................................................................................................... 35
Table 6-1 Repetitive image defects ................................................................................................................ 140
Table 6-2 Formatter connectors ..................................................................................................................... 142
Table 6-3 ECU connectors ............................................................................................................................. 143
Table 6-4 Solenoid and motor ........................................................................................................................ 144
Table 6-5 Rollers ............................................................................................................................................ 145
Table 6-6 Sensors .......................................................................................................................................... 146
Table 6-7 Major components .......................................................................................................................... 147
Table 6-8 PCAs (base unit) ............................................................................................................................ 148
Table 7-1 Whole-unit replacement, product bundle CC537A ......................................................................... 153
Table 7-2 Whole-unit replacement, product bundle CC459A ......................................................................... 155
Table 7-3 Control-panel overlays, HP LaserJet M1120 ................................................................................. 157
Table 7-4 Control-panel overlays, HP LaserJet M1120n ............................................................................... 158
Table 7-5 Documentation (print on demand) ................................................................................................. 160
Table 7-6 Scanner assemblies ....................................................................................................................... 165
Table 7-7 Assemblies ..................................................................................................................................... 167
Table 7-8 External covers and panels ............................................................................................................ 169
Table 7-9 Internal components (1 of 3) .......................................................................................................... 171
Table 7-10 Internal components (2 of 3) ........................................................................................................ 173
Table 7-11 Internal components (3 of 3) ........................................................................................................ 175
Table 7-12 Alphabetical parts list ................................................................................................................... 176
Table 7-13 Numerical parts list ....................................................................................................................... 178
Table B-1 Physical specifications ................................................................................................................... 186
Table B-2 Electrical specifications .................................................................................................................. 186
Table B-3 Power consumption (average, in watts) ....................................................................................... 186
Table B-4 Environmental specifications ........................................................................................................ 187
Table B-5 Acoustic emissions ....................................................................................................................... 187
Table C-1 有毒有害物质 表 ............................................................................................................................. 196
ENWW
ix
x
ENWW
List of figures
Figure 4-1
Figure 4-2
Figure 4-3
Figure 4-4
Figure 4-5
Figure 4-6
Figure 4-7
Figure 4-8
Figure 4-9
Figure 4-10
Figure 4-11
Figure 4-12
Figure 4-13
Figure 4-14
Figure 4-15
Figure 5-1
Figure 5-2
Figure 5-3
Figure 5-4
Figure 5-5
Figure 5-6
Figure 5-7
Figure 5-8
Figure 5-9
Figure 5-10
Figure 5-11
Figure 5-12
Figure 5-13
Figure 5-14
Figure 5-15
Figure 5-16
Figure 5-17
Figure 5-18
Figure 5-19
Figure 5-20
Figure 5-21
Figure 5-22
Figure 5-23
Figure 5-24
ENWW
System block diagram ..................................................................................................................... 34
Optical system (1 of 2) .................................................................................................................... 36
Optical system (2 of 2) .................................................................................................................... 37
Cross-section of printer ................................................................................................................... 38
Engine control system ..................................................................................................................... 39
Engine-control-system circuit diagram ............................................................................................ 40
Laser/scanner system ..................................................................................................................... 41
Pickup/feed/delivery system ........................................................................................................... 42
Image-formation system ................................................................................................................. 43
Primary charging ........................................................................................................................... 43
Developing .................................................................................................................................... 44
Transfer ......................................................................................................................................... 45
Separation ..................................................................................................................................... 45
Fusing ........................................................................................................................................... 46
Drum cleaning ............................................................................................................................... 46
Phillips and pozidrive screwdriver comparison ............................................................................... 49
Parts removal order ........................................................................................................................ 52
Remove the link assemblies and scanner support-frame spring (1 of 4) ........................................ 53
Remove the link assemblies and scanner support-frame spring (2 of 4) ........................................ 54
Remove the link assemblies and scanner support-frame spring (3 of 4) ........................................ 54
Remove the link assemblies and scanner support-frame spring (4 of 4) ........................................ 55
Remove the scanner lid (1 of 2) ...................................................................................................... 56
Remove the scanner lid (2 of 2) ...................................................................................................... 56
Remove the control-panel overlay .................................................................................................. 57
Remove the control-panel assembly (1 of 3) ................................................................................ 58
Remove the control-panel assembly (2 of 3) ................................................................................ 58
Remove the control-panel assembly (3 of 3) ................................................................................ 59
Remove the scanner assembly (1 of 10) ...................................................................................... 60
Remove the scanner assembly (2 of 10) ...................................................................................... 60
Remove the scanner assembly (3 of 10) ...................................................................................... 61
Remove the scanner assembly (4 of 10) ...................................................................................... 61
Remove the scanner assembly (5 of 10) ...................................................................................... 62
Remove the scanner assembly (6 of 10) ...................................................................................... 62
Remove the scanner assembly (7 of 10) ...................................................................................... 63
Remove the scanner assembly (8 of 10) ...................................................................................... 63
Remove the scanner assembly (9 of 10) ...................................................................................... 64
Remove the scanner assembly (10 of 10) .................................................................................... 64
Remove the print cartridge (1 of 2) ............................................................................................... 65
Remove the print cartridge (2 of 2) ............................................................................................... 65
xi
Figure 5-25
Figure 5-26
Figure 5-27
Figure 5-28
Figure 5-29
Figure 5-30
Figure 5-31
Figure 5-32
Figure 5-33
Figure 5-34
Figure 5-35
Figure 5-36
Figure 5-37
Figure 5-38
Figure 5-39
Figure 5-40
Figure 5-41
Figure 5-42
Figure 5-43
Figure 5-44
Figure 5-45
Figure 5-46
Figure 5-47
Figure 5-48
Figure 5-49
Figure 5-50
Figure 5-51
Figure 5-52
Figure 5-53
Figure 5-54
Figure 5-55
Figure 5-56
Figure 5-57
Figure 5-58
Figure 5-59
Figure 5-60
Figure 5-61
Figure 5-62
Figure 5-63
Figure 5-64
Figure 5-65
Figure 5-66
Figure 5-67
Figure 5-68
Figure 5-69
Figure 5-70
Figure 5-71
Figure 5-72
Figure 5-73
Figure 5-74
xii
Remove the separation pad (1 of 2) ............................................................................................. 66
Remove the separation pad (2 of 2) ............................................................................................. 66
Remove the pickup roller (1 of 5) .................................................................................................. 67
Remove the pickup roller (2 of 5) .................................................................................................. 67
Remove the pickup roller (3 of 5) .................................................................................................. 68
Remove the pickup roller (4 of 5) .................................................................................................. 68
Remove the pickup roller (5 of 5) .................................................................................................. 69
Installing the scanner cushions ..................................................................................................... 70
Remove the media input tray (1 of 3) ........................................................................................... 71
Remove the media input tray (2 of 3) ........................................................................................... 71
Remove the media input tray (3 of 3) ........................................................................................... 72
Remove the transfer roller ............................................................................................................ 73
Remove the side covers (1 of 4) ................................................................................................... 74
Remove the side covers (2 of 4) ................................................................................................... 74
Remove the side covers (3 of 4) ................................................................................................... 75
Remove the side covers (4 of 4) ................................................................................................... 75
Remove the print-cartridge door (1 of 2) ....................................................................................... 76
Remove the print-cartridge door (2 of 2) ....................................................................................... 76
Remove the rear cover and fuser cover (1 of 3) ........................................................................... 77
Remove the rear cover and fuser cover (2 of 3) ........................................................................... 77
Remove the rear cover and fuser cover (3 of 3) ........................................................................... 78
Remove the front cover (1 of 4) .................................................................................................... 79
Remove the front cover (2 of 4) .................................................................................................... 79
Remove the front cover (3 of 4) .................................................................................................... 80
Remove the front cover (4 of 4) .................................................................................................... 80
Remove the formatter ................................................................................................................... 81
Remove the power supply (1 of 7) ................................................................................................ 82
Remove the power supply (2 of 7) ................................................................................................ 82
Remove the power supply (3 of 7) ................................................................................................ 83
Remove the power supply (4 of 7) ................................................................................................ 83
Remove the power supply (5 of 7) ................................................................................................ 84
Remove the power supply (7 of 7) ................................................................................................ 84
Remove the power supply (7 of 7) ................................................................................................ 85
Remove the scanner support frame (1 of 5) ................................................................................. 86
Remove the scanner support frame (2 of 5) ................................................................................. 87
Remove the scanner support frame (3 of 5) ................................................................................. 87
Remove the scanner support frame (4 of 5) ................................................................................. 88
Remove the scanner support frame (5 of 5) ................................................................................. 88
Remove the laser/scanner (1 of 7) ................................................................................................ 89
Remove the laser/scanner (2 of 7) ................................................................................................ 90
Remove the laser/scanner (3 of 7) ................................................................................................ 90
Remove the laser/scanner (4 of 7) ................................................................................................ 91
Remove the laser/scanner assembly (5 of 7) ............................................................................... 91
Remove the laser/scanner assembly (6 of 7) ............................................................................... 92
Remove the laser/scanner assembly (7 of 7) ............................................................................... 92
Remove the main motor (1 of 4) ................................................................................................... 93
Remove the main motor (2 of 4) ................................................................................................... 94
Remove the main motor (3 of 4) ................................................................................................... 94
Remove the main motor (4 of 4) ................................................................................................... 95
Remove the fuser (1 of 6) ............................................................................................................. 96
ENWW
Figure 5-75
Figure 5-76
Figure 5-77
Figure 5-78
Figure 5-79
Figure 5-80
Figure 5-81
Figure 5-82
Figure 5-83
Figure 5-84
Figure 5-85
Figure 5-86
Figure 5-87
Figure 6-1
Figure 6-2
Figure 6-3
Figure 6-4
Figure 6-5
Figure 6-6
Figure 6-7
Figure 6-8
Figure 6-9
Figure 6-10
Figure 7-1
Figure 7-2
Figure 7-3
Figure 7-4
Figure 7-5
Figure 7-6
ENWW
Remove the fuser (2 of 6) ............................................................................................................. 97
Remove the fuser (3 of 6) ............................................................................................................. 97
Remove the fuser (4 of 6) ............................................................................................................. 98
Remove the fuser assembly (5 of 6) ............................................................................................. 98
Remove the fuser assembly (6 of 6) ............................................................................................. 99
Remove the paper-pickup assembly (1 of 4) .............................................................................. 100
Remove the paper-pickup assembly (2 of 4) .............................................................................. 101
Remove the paper-pickup assembly (3 of 4) .............................................................................. 101
Remove the paper-pickup assembly (4 of 4) .............................................................................. 102
Remove the drive-gear assembly and drive belt (1 of 4). ........................................................... 103
Remove the drive-gear assembly and drive belt (2 of 4). ........................................................... 103
Remove the drive-gear assembly and drive belt (3 of 4). ........................................................... 104
Remove the Drive-gear assembly and drive belt (4 of 4). .......................................................... 104
Print-cartridge high-voltage connection points (right side) ............................................................ 133
Print-cartridge high-voltage connection points (left side) .............................................................. 134
Formatter connectors .................................................................................................................... 142
ECU connectors ............................................................................................................................ 143
Solenoid and motor ....................................................................................................................... 144
Rollers ........................................................................................................................................... 145
Sensors ......................................................................................................................................... 146
Major components ........................................................................................................................ 147
PCAs (base unit) ........................................................................................................................... 148
Circuit diagram ........................................................................................................................... 149
Scanner assemblies ...................................................................................................................... 164
Assemblies .................................................................................................................................... 166
External covers and panels .......................................................................................................... 168
Internal components (1 of 3) ......................................................................................................... 170
Internal components (2 of 3) ......................................................................................................... 172
Internal components (3 of 3) ......................................................................................................... 174
xiii
xiv
ENWW
1
ENWW
Product information
●
Quick access to product information
●
Product comparison
●
Product features
●
Product walkaround
●
Software description
●
Software for Windows
●
Software for Macintosh
●
Uninstall software
●
Media specifications
1
Quick access to product information
Use the following Web site to find information about the product.
●
www.hp.com/support/LJM1120
Table 1-1 Product guides
Guide
Description
HP LaserJet M1120 MFP Getting Provides step-by-step instructions for installing and setting up the product.
Started Guide
2
HP LaserJet M1120 MFP Series
User Guide
Provides detailed information for using the product and problem-solving. Available on the
product CD or in Program Group if the software is installed on a computer.
Online Help
Provides information about options that are available in the printer drivers. To view a Help
file, open the online Help through the printer driver.
Chapter 1 Product information
ENWW
Product comparison
The product is available in the following configurations.
ENWW
Base models
Network models
●
Print letter-size pages at speeds up to 20 pages per
minute (ppm) and A4-size pages at speeds up to 19 ppm.
Base model, plus:
●
Priority input tray holds up to 10 sheets of print media.
●
Tray 1 holds up to 250 sheets of print media or 10
envelopes.
●
Manual two-sided (duplex) printing and copying.
●
Hi-Speed USB 2.0 port.
●
32-megabyte (MB) random-access memory (RAM).
●
Flatbed scanner.
●
10/100 Base-T Ethernet network port.
●
IPv4 network protocol.
●
IPv6 network protocol.
Product comparison
3
Product features
●
Prints letter-size pages at speeds up to 20 ppm and A4-size pages at speeds up to 19 ppm.
●
Prints at 600 dots per inch (dpi) and FastRes 1200 dpi.
●
Includes adjustable settings to optimize print quality.
Copy
●
Copies at 300 dots per inch (dpi).
Memory
●
Includes 32 MB RAM.
Paper handling
●
Priority input tray holds up to 10 pages.
●
Tray 1 holds up to 250 sheets of print media or 10 envelopes.
●
Output bin holds up to 100 sheets of print media.
Scan
●
Provides 1200 pixels per inch (ppi) full-color scanning.
Printer driver features
●
FastRes 1200 produces 1200-dots-per-inch (dpi) print quality for fast, high-quality printing
of business text and graphics.
Interface connections
●
All models include a Hi-Speed USB 2.0 port.
●
Network models include a 10/100 Base-T Ethernet network port.
●
Provides N-up printing (printing more than one page on a sheet).
●
Provides an EconoMode setting, which uses less toner.
●
Uses a print cartridge that has a no-shake design.
●
The product ships with a 1,000-page (average yield) starter cartridge. The average yield
for replacement cartridges is 2,000 pages.
●
Online user guide is compatible with text screen-readers.
●
Print cartridges can be installed and removed by using one hand.
●
All doors and covers can be opened by using one hand.
Print
Economical printing
Supplies
Accessibility
4
Chapter 1 Product information
ENWW
Product walkaround
Front view
1
2
3
6
1
Scanner lid
2
Control panel
3
Print-cartridge door latch
4
Output bin
5
Priority input tray
6
Tray 1
5
4
Back view
7
9
ENWW
7
Interface ports
8
Power switch
9
Power connector
8
Product walkaround
5
Interface ports
All models have a Hi-Speed USB 2.0 port, and network models also have a 10/100 Base-T Ethernet
port.
1
2
1
Hi-Speed USB 2.0 port
2
Ethernet port (network models only)
Serial number and model number location
The serial number and product model number label is on the rear of the product.
6
Chapter 1 Product information
ENWW
Software description
Supported operating systems
The product supports the following operating systems:
Full software installation
Print and scan drivers only
●
Windows XP (32-bit)
●
Windows XP (64-bit)
●
Windows Vista (32-bit)
●
Windows Vista (64-bit)
●
Windows 2000
●
Windows 2003 Server (64-bit)
●
Windows 2003 Server (32-bit)
●
Mac OS X v10.3, v10.4, and later
NOTE: For Mac OS X v10.4 and later, PPC and Intel Core Processor Macs are supported.
Supported printer drivers
The product comes with software for Windows and Macintosh that allows the computer to communicate
with the product. This software is called a printer driver. Printer drivers provide access to product
features, such as printing on custom-sized paper, resizing documents, and inserting watermarks.
NOTE: The most recent drivers are available at www.hp.com/support/LJM1120. Depending on the
configuration of Windows-based computers, the installation program for the product software
automatically checks the computer for Internet access in order to obtain the latest drivers.
Software included with the product
There are several options for completing a recommended install. Easy installation will complete the
installation with default settings. Advanced installation allows you to review the license agreements and
the default settings.
Easy installation for Windows
●
●
ENWW
HP drivers
◦
Printer driver
◦
Scan driver
HP MFP software
◦
HP LaserJet Scan program
◦
Uninstall program
●
HP Update program
●
HP Customer Participation program
Software description
7
●
Shop for HP Supplies program
●
Other programs
◦
Readiris OCR (not installed with other software; separate installation is required)
Advanced installation
Advanced installation includes all of the features that are available with the easy installation. The
HP Customer Participation program is optional.
Macintosh software
8
●
HP Product Setup Assistant
●
HP Uninstaller
●
HP LaserJet software
◦
HP Scan
◦
HP Director
◦
Scan to e-mail program
◦
HP Photosmart
Chapter 1 Product information
ENWW
Software for Windows
Embedded Web server (network models only)
Network models are equipped with an embedded Web server, which provides access to information
about device and network activities. This information appears in a Web browser, such as Microsoft
Internet Explorer, Netscape Navigator, Apple Safari, or Firefox.
The embedded Web server resides on the device. It is not loaded on a network server.
The embedded Web server provides an interface to the device that anyone who has a networkconnected computer and a standard Web browser can use. No special software is installed or
configured, but you must have a supported Web browser on your computer. To gain access to the
embedded Web server, type the IP address for the device in the address line of the browser. (To find
the IP address, print a configuration page.)
Status Alerts software
The Status Alerts software provides information about the current status of the product.
The software also provides pop-up alerts when certain events occur, such as an empty tray or a problem
with the product. The alert includes information about solving the problem.
Other Windows components and utilities
ENWW
●
Software installer — automates the printing system installation
●
Online Web registration
Software for Windows
9
Software for Macintosh
Embedded Web server (network models only)
Network models are equipped with an embedded Web server, which provides access to information
about device and network activities. This information appears in a Web browser, such as Microsoft
Internet Explorer, Netscape Navigator, Apple Safari, or Firefox.
The embedded Web server resides on the device. It is not loaded on a network server.
The embedded Web server provides an interface to the device that anyone who has a networkconnected computer and a standard Web browser can use. No special software is installed or
configured, but you must have a supported Web browser on your computer. To gain access to the
embedded Web server, type the IP address for the device in the address line of the browser. (To find
the IP address, print a configuration page.)
HP Director
HP Director is a software program for working with documents. HP Director appears on the computer
screen to initiate scanning, or to change settings on the product through Macintosh Configure Device.
Also included is the HP product Setup Assistant, which sets up the print queue.
10
Chapter 1 Product information
ENWW
Uninstall software
Windows
1.
Click Start, and then click All Programs.
2.
Click HP, and then click HP LaserJet M1120.
3.
Click Uninstall, and then follow the onscreen instructions to remove the software.
Macintosh
To remove the software, drag the PPD files to the trash can.
ENWW
Uninstall software
11
Media specifications
Supported paper and print media sizes
This product supports a number of paper sizes, and it adapts to various media.
NOTE: To obtain best print results, select the appropriate paper size and type in the print driver before
printing.
Table 1-2 Supported paper and print media sizes
1
Size
Dimensions
Letter
216 x 279 mm (8.5 x 11 in)
Legal
216 x 356 mm (8.5 x 14 in)
A4
210 x 297 mm (8.27 x 11.69 in)
Executive
184 x 267 mm (7.24 x 10.51 in)
A3
297 x 420 mm (11.69 x 16.54 in)
A5
148 x 210 mm (5.83 x 8.27 in)
A6
105 x 148 mm (4.13 x 5.83 in)
B5 (JIS)
182 x 257 mm (7.17 x 10.12 in)
16k
197 x 273 mm (7.75 x 10.75 in)
16k
195 x 270 mm (7.7 x 10.6 in)
16k
184 x 260 mm (7.25 x 10.25 in)
8.5 x 13
216 x 330 mm (8.5 x 13 in)
4 x 61
107 x 152 mm (4 x 6 in)
5 x 81
127 x 203 mm (5 x 8 in)
10 x 15 cm1
100 x 150 mm (3.9 x 5.9 in)
Custom
Priority input tray: Minimum—76 x 127 mm (3 x
5 in); Maximum—216 x 356 mm (8.5 x 14 in)
Priority input tray
Tray 1
Priority input tray
Tray 1
These sizes are supported as custom sizes.
Table 1-3 Supported envelopes and postcards
12
Size
Dimensions
Envelope #10
105 x 241 mm (4.13 x 9.49 in)
Envelope DL
110 x 220 mm (4.33 x 8.66 in)
Chapter 1 Product information
ENWW
Table 1-3 Supported envelopes and postcards (continued)
Size
Dimensions
Envelope C5
162 x 229 mm (6.93 x 9.84 in)
Envelope B5
176 x 250 mm (6.7 x 9.8 in)
Envelope Monarch
98 x 191 mm (3.9 x 7.5 in)
Postcard
100 x 148 mm (3.94 x 5.83 in)
Double postcard
148 x 200 mm (5.83 x 7.87 in)
Priority input tray
Tray 1
Supported paper types and tray capacity
This product has the following tray priority for feeding print media:
1.
Priority input tray
2.
Tray 1
Minimum media dimensions are 76 x 127 mm (3 x 5 in).
Maximum media dimensions are 216 x 356 mm (8.5 x 14 in).
To obtain the best print results, change the paper size and paper type settings in the printer driver before
printing.
Table 1-4 Supported paper types and tray capacity
Type is
Media specifications
Priority input tray
Tray 1 capacity1
Plain
75 g/m2 (20 lb) to 104 g/m2 (27 lb)
Up to 10 sheets
Up to 250 sheets
Light
60 g/m2 (16 lb) to 75 g/m2 (20 lb)
Up to 10 sheets
Up to 260 sheets
Envelopes
Less than 90 g/m2 (24 lb)
1 envelope
Up to 10 envelopes.
Labels
Standard
1 sheet
Not supported.
Bond
75 g/m2 (20 lb) to 104 g/m2 (27 lb)
1 sheet
Up to 250 sheets
Rough
75 g/m2 (20 lb) to 104 g/m2 (27 lb)
1 sheet
Up to 200 sheets
Transparencies
4 mm (0.1 in) Monochrome
Overhead
1 sheet
Up to 200 sheets.
Heavy
110 g/m2 (29 lb) to 125 g/m2
(33 lb)
Up to 10 sheets
Not supported.
Letterhead
75 g/m2 (20 lb) to 104 g/m2 (27 lb)
Up to 10 sheets
Up to 250 sheets
Color
Preprinted
Prepunched
Recycled
1
ENWW
The maximum stack height for tray 1 is 25 mm (1 inch).
Media specifications
13
14
Chapter 1 Product information
ENWW
2
ENWW
Installation
●
Site preparations
●
What was in the box
●
Install input devices
●
Install supplies
15
Site preparations
Operating environment
Place the product on a sturdy, level surface in a well-ventilated area. Make sure that the air vents are
not blocked and that the product is installed away from direct sunlight, open flames, and ammonia fumes.
Store or install the product in an area that meets the following requirements:
16
●
Temperature (printer; operating) 15o to 32.5o C (59o to 90.5o F)
●
Temperature (printer; storage) -20o to 60oC (-4o to 140oF)
●
Humidity (printer; operating) 10% to 80% relative humidity (no condensation)
●
Humidity (printer; storage) 10% to 90% relative humidity (no condensation)
●
Temperature (toner cartridge; storage) -20o to 40o C (-4o to 104o F)
●
Humidity (toner cartridge; storage) 10% to 90% relative humidity (no condensation)
Chapter 2 Installation
ENWW
Minimum system requirements
ENWW
●
Windows® 2000
●
Windows XP
●
Windows Server 2003
●
Windows Vista
●
Mac OS X v10.3 and later
●
128 MB RAM for Windows operating systems
●
32 MB RAM for Macintosh operating systems
●
250 MB hard-disk space (full installation)
●
CD-ROM drive
●
USB port
Site preparations
17
What was in the box
The following components are included in the box.
NOTE: The USB and network cables are not included.
5
3
2
7
6
4
1
18
8
Item
Description
1
HP LaserJet M1120 MFP
2
Print cartridge
3
Control-panel faceplate (if not already installed)
4
Output bin extension
5
Start guide and support flyer
6
CD-ROMs (software and online user guide)
7
Power cord
8
Tray 1
Chapter 2 Installation
ENWW
Install input devices
Priority input tray
The priority input tray is accessed from the front of the product. The product prints from the priority input
tray before attempting to print from tray 1.
Media guides ensure that the media is correctly fed into the product and that the print is not skewed
(crooked on the media). When loading media, adjust the media guides to match the width of the media
that you are using.
ENWW
Install input devices
19
Tray 1
20
1.
Push tray 1 into the product.
2.
Open the tray cover, and then adjust the media guides out.
3.
Load the paper in the tray, snug the media guides against the stack, and then close the tray cover.
Chapter 2 Installation
ENWW
Install supplies
Install the print cartridge
ENWW
1.
Open the print-cartridge door.
2.
Remove the new print cartridge from its packaging, and then rock the print cartridge back and forth.
3.
Remove the orange cover from the print cartridge, and then pull the orange tab straight out to
remove the sealing tape.
Install supplies
21
22
4.
Insert the cartridge into the product until it is firmly in place.
5.
Close the print-cartridge door.
Chapter 2 Installation
ENWW
3
ENWW
Maintenance
●
Manage supplies
●
Clean the product
●
Management tools
23
Manage supplies
Inspect any parts that wear when servicing the product. Replace them as needed, based on failure or
wear rather than usage.
The following table lists approximate schedules for replacing consumables.
Life expectancies of supplies
Item
Capacity
HP LaserJet M1120 MFP Series
Recommended maximum of 3,000 pages per month
Print cartridge
2,000 pages1 (standard)
1
For information about the yield for the cartridges, see www.hp.com/go/pageyield. Actual yield depends on specific use.
Check and order supplies
Hewlett-Packard recommends that you place an order for a replacement print cartridge when the Low
message for a print cartridge first appears. Use a new, authentic HP print cartridge to obtain the following
types of supplies information:
●
Amount of cartridge life remaining
●
Estimated number of pages remaining
●
Number of pages printed
●
Other supplies information
Store supplies
Follow these guidelines for storing print cartridges:
●
Do not remove the print cartridge from its package until you are ready to use it.
CAUTION: To prevent damage, do not expose the print cartridge to light for more than a few
minutes.
24
●
See Environmental specifications on page 187 for operating and storage temperature ranges.
●
Store the supply in a horizontal position.
●
Store the supply in a dark, dry location away from heat and magnetic sources.
Chapter 3 Maintenance
ENWW
Replace supplies
Print cartridge
ENWW
1.
Open the print-cartridge door.
2.
Grasp the handle on the print cartridge, and then pull the cartridge straight out to remove it. See
the recycling information inside the print cartridge box.
3.
Remove the new print cartridge from its packaging, and then rock the print cartridge back and forth.
Manage supplies
25
4.
Remove the orange cover from the print cartridge, and then pull the orange tab straight out to
remove the sealing tape.
5.
Insert the cartridge into the product until it is firmly in place.
6.
Close the print-cartridge door.
CAUTION: If toner gets on any clothing, wipe it off with a dry cloth and wash the clothing in cold water.
Hot water sets toner into the fabric.
HP policy on non-HP supplies
Hewlett-Packard Company cannot recommend the use of non-HP supplies, either new or
remanufactured. Because they are not HP products, HP cannot influence their design or control their
quality. Service or repairs required as a result of using a non-HP supply will not be covered under the
warranty.
26
Chapter 3 Maintenance
ENWW
HP fraud hotline
Call the HP fraud hotline if the product indicates that the print cartridge is not an HP print cartridge and
you think that it is genuine. HP will help determine if the product is genuine and take steps to resolve
the problem.
The print cartridge might not be a genuine HP one if you notice the following issues:
●
You are experiencing a large number of problems with the print cartridge.
●
The print cartridge does not look like it usually does (for example, the pull tab or the box is different).
In the United States, call toll-free: 1-877-219-3183.
Outside the United States, you can call collect. Dial the operator and ask to place a collect call to this
telephone number: 1-770-263-4745. If you do not speak English, a representative at the HP fraud hotline
who speaks your language will assist you. Or, if someone who speaks your language is not available,
a language line interpreter will connect approximately one minute after the beginning of the call. The
language line interpreter is a service that will translate between you and the representative for the HP
fraud hotline.
ENWW
Manage supplies
27
Clean the product
Clean the exterior
Use a soft, damp, lint-free cloth to wipe dust, smudges, and stains off of the exterior of the product.
Clean the flatbed scanner glass
Dirty glass, from fingerprints, smudges, hair, and so on, slows down performance and affects the
accuracy of special features such as fit-to-page and copy.
1.
Turn off the product, unplug the power cord from the electrical outlet, and raise the scanner cover.
2.
Clean the glass by using a soft cloth or sponge that has been moistened with nonabrasive glass
cleaner.
CAUTION: Do not use abrasives, acetone, benzene, ammonia, ethyl alcohol, or carbon
tetrachloride on any part of the product; these can damage the product. Do not place liquids directly
on the glass. They might seep under it and damage the product.
Clean the lid backing
Minor debris can accumulate on the white document lid backing that is located underneath the product
lid.
28
1.
Turn off the product, unplug the power cord, and raise the lid.
2.
Clean the white document lid backing by using a soft cloth or sponge that has been moistened with
a mild soap and warm water. Wash the backing gently to loosen debris; do not scrub the backing.
Chapter 3 Maintenance
ENWW
3.
Dry the backing by using a chamois or soft cloth.
CAUTION: Do not use paper-based wipes because they might scratch the backing.
4.
If this does not clean the backing well enough, repeat the previous steps and use isopropyl alcohol
to dampen the cloth or sponge, and then wipe the backing thoroughly with a damp cloth to remove
any residual alcohol.
Clean the paper path
During the printing process, paper, toner, and dust particles can accumulate inside the product. Over
time, this buildup can cause print-quality problems such as toner specks or smearing. This product has
a cleaning mode that can correct and prevent these types of problems.
Specks
Smearing
1.
Press Setup.
2.
Use the arrow buttons to find the Service menu, and then press OK.
3.
Use the arrow buttons to find Cleaning mode, and then press OK.
4.
Load plain letter or A4 paper when you are prompted.
5.
Press OK again to confirm and begin the cleaning process.
A page feeds through the product slowly. Discard the page when the process is completed.
ENWW
Clean the product
29
Management tools
Information pages
Information pages reside within the product memory. These pages help diagnose and solve problems
with the product.
NOTE: If the product language was not correctly set during installation, you can set the language
manually so the information pages print in one of the supported languages. Change the language by
using the System setup menu on the control panel or the embedded Web server (network models only).
Page description
How to print the page
Demo page
1.
On the product control panel, press Setup.
Contains examples of text and graphics.
2.
Use the arrow buttons to select Reports, and then press
OK.
3.
Use the arrow buttons to select Demo page, and then
press OK.
Menu map
1.
On the product control panel, press Setup.
Shows the control-panel menus and available settings.
2.
Use the arrow buttons to select Reports, and then press
OK.
3.
Use the arrow buttons to select Menu structure, and then
press OK.
Configuration page
1.
On the product control panel, press Setup.
Shows the current settings and product properties.
2.
Use the arrow buttons to select Reports, and then press
OK.
3.
Use the arrow buttons to select Config report, and then
press OK.
Embedded Web server
This product is equipped with an embedded Web server (EWS), which provides access to information
about product and network activities. A Web server provides an environment in which web programs
may run, much in the same way that an operating system, such as Windows, provides an environment
for programs to run on a computer. The output from these programs can then be displayed by a Web
browser, such as Microsoft Internet Explorer, Safari, or Netscape Navigator.
An “embedded” Web server resides on a hardware device (such as an HP LaserJet product) or in
firmware, rather than as software that is loaded on a network server.
The advantage of an EWS is that it provides an interface to the product that anyone with a networkconnected product and computer can use. There is no special software to install or configure, but you
must have a supported Web browser on the computer. To gain access to the EWS, type the IP address
for the product in the address line of the browser. (To find the IP address, print a configuration page.)
NOTE: For Macintosh operating systems, you can use the EWS over a USB connection after installing
the Macintosh software included with the product.
30
Chapter 3 Maintenance
ENWW
Features
The EWS allows you to view product and network status and manage printing functions from a computer.
With the EWS, you can complete the following tasks:
●
View product status information
●
Determine the remaining life on all supplies and order new ones
●
View and change part of the product configuration
●
View and print some internal pages
●
Select the language in which to display the EWS pages
●
View and change network configuration
●
Set, change, or clear the product security password
NOTE: Changing network settings in the EWS might disable some of product software or features.
ENWW
Management tools
31
32
Chapter 3 Maintenance
ENWW
4
ENWW
Operational theory
●
Basic operation
●
Scanner functions and operation
●
Internal components (base unit)
●
Engine control system
●
Laser/scanner system
●
Pickup/feed/delivery system
●
Image-formation system
33
Basic operation
This chapter presents an overview of the relationships between major components in the product, and
includes a detailed discussion of the image-formation system. The following systems are discussed:
●
Engine control system
●
Laser/scanner system
●
Pickup/feed/delivery system
●
Image-formation system
Figure 4-1 System block diagram
Sequence of operation for the base unit
Operational sequences are controlled by the microprocessor on the DC controller.
Table 4-1 Sequence of operation
34
Name
Timing
WAIT
From power-on until the end of the main-motor initial Detects the presence of a print cartridge; clears
drive
potential from the drum surface and cleans the
transfer roller
STBY (standby)
From the end of the WAIT or LSTR period until either
a print command is sent from the formatter or the
power is turned off
Prepares the product to receive print commands
INTR (initial
rotation)
From the time of the print command until the pickup
solenoid is turned on
Prepares the photosensitive drum for printing
Chapter 4 Operational theory
Purpose
ENWW
Table 4-1 Sequence of operation (continued)
Name
Timing
Purpose
PRINT
From the end of the INTR period until the primary
high-voltage is turned off
Forms the image on the photosensitive drum and
transfers the toner image to the media
LSTR (last
rotation)
From the end of the PRINT period (when high-voltage Delivers the last page of a print job
is turned off) until the main motor stops rotating
After LSTR, the product either returns to STBY or, if
another print command was sent from the formatter,
enters INTR.
Table 4-2 Power-on sequence
Step
Action
1
Power-on
2
CPU initialization
3
Start video interface communication
4
Check sensors for residual media
5
Main motor initial drive
6
Fuser heater initial drive. The fuser heater reaches a surface temperature of 100o C.
7
Laser/scanner motor initial drive
8
High-voltage control
Detect presence of a print cartridge
Clean the transfer roller after the primary charging AC bias is turned on
ENWW
9
Failure/abnormality check: detect laser/scanner failure, fuser failure, and open covers
10
Communication with the memory tag
Basic operation
35
Scanner functions and operation
The following sections describe how the document scanner functions.
Scanner functions
The contact image sensor (CIS) is the major component of the optical scanning system. The CIS
consists of three LEDs (red, green, and blue), a light guide, the scanning glass, the rod lens array, and
a sensor array. When the CIS scans a document, the CIS moves and the paper is stationary.
Figure 4-2 Optical system (1 of 2)
The formatter controls the CIS. To begin scanning, the formatter sends a signal to the CIS. The LEDs
illuminate and the light passes through the light guide and scanning glass and strikes the document.
Light that the document reflects passes back through the scanning glass and rod lens array into the
sensor array. The sensor array consists of 5,148 photosensors (468 photosensors on each of 11 sensor
driver circuits). The sensor array collects and amplifies the reflected light and converts it into serial data
in the driver circuits. The CIS sends the data to the formatter for image formation.
36
Chapter 4 Operational theory
ENWW
Figure 4-3 Optical system (2 of 2)
Scanner operation
At startup and periodically at other times, the scanner assembly moves systematically to locate its home
position. It then calibrates to a white strip located under the glass at the right end of the scan tub.
ENWW
Scanner functions and operation
37
Internal components (base unit)
Figure 4-4 Cross-section of printer
1
2
3
5
4
6
12
38
11
10
9
1
Fuser unit
2
Pressure roller
3
Fuser sleeve
4
Delivery roller
5
Laser/scanner unit
6
Single-sheet-feed slot
7
Multi-purpose tray
8
Photosensitive drum
9
Pickup roller
10
Separation pad
11
Feed roller
12
Transfer roller
8
Chapter 4 Operational theory
7
ENWW
Engine control system
The engine control system coordinates all of the product functions, according to commands sent from
the formatter. It drives the laser/scanner system, the image-formation system, and the pickup/feed/
delivery system.
The engine control system contains the following components:
●
DC controller
●
Low-voltage power supply
●
High-voltage power supply
●
Fusing control
Figure 4-5 Engine control system
ENGINE CONTROL SYSTEM
DC controller
LASER/SCANNER SYSTEM
Low-voltage power supply
Formatter
IMAGE-FORMATION SYSTEM
High-voltage power supply
PICKUP-AND-FEED SYSTEM
Fixing control
ENWW
Engine control system
39
Figure 4-6 Engine-control-system circuit diagram
Engine controller
M
Fixing unit
Motor
Fixing control
Solenoid
AC input
Low-voltage
power supply
DC controller
Sensor
Transfer roller
High-voltage
power supply
Cartridge
Switch
Formatter
40
Chapter 4 Operational theory
Laser/scanner
unit
ENWW
Laser/scanner system
The laser/scanner system receives video signals from the DC controller and the formatter, and then
converts the signals into latent images on the photosensitive drum.
Figure 4-7 Laser/scanner system
ENWW
Laser/scanner system
41
Pickup/feed/delivery system
The pickup/feed/delivery system consists of several types of feed rollers and sensors. The DC controller
uses two motors and two solenoids to drive the rollers. Three media-detection sensors detect media as
it passes through the printer. If media does not reach or pass each sensor within a specified time period,
the DC controller determines that a jam has occurred and alerts the formatter.
The following components are identified in Figure 4-8 Pickup/feed/delivery system on page 42:
●
M1, main motor
●
SL1, pickup solenoid
●
PS701, fuser-delivery sensor
●
PS702, media-width sensor
●
PS751, top-of-page sensor
Figure 4-8 Pickup/feed/delivery system
Feed roller
Pressure roller
PS702
PS701
Fuser sleeve
Photosensitive drum
M1
Transfer roller
PS751
Pickup roller
Single-sheet-feed tray
Multi-purpose tray
SL1
Separation pad
42
Chapter 4 Operational theory
ENWW
Image-formation system
Laser printing requires the interaction of several technologies, including electronics, optics, and
electrophotographics, to produce a printed page. Each process functions independently and must be
coordinated with the other product processes. Image formation consists of the following five processes:
●
Electrostatic latent-image formation
●
Developing
●
Transfer
●
Fusing
●
Drum cleaning
These five processes contain seven steps, which are shown in Figure 4-9 Image-formation system
on page 43 and described in the following sections.
Figure 4-9 Image-formation system
Step 1: Primary charging
DC and AC biases are applied to the primary charging roller, which transfers a uniform negative potential
to the photosensitive drum.
Figure 4-10 Primary charging
ENWW
Image-formation system
43
Step 2: Laser beam exposure
The laser beam scans the photosensitive drum to neutralize negative charges on parts of the drum. An
electrostatic latent image is formed on the drum where negative charges were neutralized.
Step 3: Developing
The developing cylinder comes in contact with the photosensitive drum to deposit toner onto the
electrostatic latent image.
NOTE: The charges on the exposed area of the drum are shown as positive in Figure 4-11 Developing
on page 44. The charges are actually negative, but they are more positive than the charges on the
developing cylinder.
Figure 4-11 Developing
Toner acquires a negative charge through friction from the developing cylinder and the blade. When the
negatively charged toner comes in contact with the drum, the toner adheres to the electrostatic latent
image. The image on the drum becomes visible because of the toner.
Step 4: Transfer
The transfer charging roller, to which a DC positive bias is applied, imparts a positive charge on the print
media. When the print media comes in contact with the photosensitive drum, the toner is transferred to
the print media.
44
Chapter 4 Operational theory
ENWW
Figure 4-12 Transfer
Step 5: Separation
The elasticity of the print media causes its separation from the photosensitive drum. A static-charge
eliminator aids separation by weakening any electrostatic adhesion.
Figure 4-13 Separation
Step 6: Fusing
The DC negative bias applied to the fusing film strengthens the holding force of the toner on the print
media and prevents the toner from scattering.
ENWW
Image-formation system
45
Figure 4-14 Fusing
Step 7: Drum cleaning
The cleaning blade scrapes the residual toner off of the photosensitive drum and deposits it into the
waste-toner case.
Figure 4-15 Drum cleaning
46
Chapter 4 Operational theory
ENWW
5
ENWW
Removal and replacement
●
Removal and replacement strategy
●
Scanner assembly
●
Product base
47
Removal and replacement strategy
●
Introduction
●
Before performing service
●
After performing service
●
Post-service tests
●
Parts removal order
Introduction
This chapter documents the removal and replacement of field-replaceable units (FRUs) only. Replacing
FRUs is generally the reverse of removal. Occasionally, notes and tips are included to provide directions
for difficult or critical replacement procedures.
HP does not support the repairing of individual subassemblies or troubleshooting at the component
level.
Note the length, diameter, color, type, and location of each screw. Be sure to return each screw to its
original location during reassembly.
Incorrectly routed or loose wire harnesses can interfere with other internal components and can become
damaged or broken. Frayed or pinched harness wires can be difficult to locate. When replacing wire
harnesses, always use the provided wire loops, lance points, or wire-harness guides.
Removal and replacement warnings, cautions, notes, and tips
WARNING! Turn the product off, wait 5 seconds, and then remove the power cord before attempting
to service the product. If this warning is not followed, severe injury can result, as well as damage to the
product. The power must be on for certain functional checks during problem solving. However, the power
supply should be disconnected during parts removal.
Never operate or service the product with the protective cover removed from the laser/scanner
assembly. The invisible reflected beam can damage your eyes.
Sheet-metal and plastic edges in the product can be sharp. Use caution when servicing this product.
CAUTION: Do not bend or fold the flat flexible cables (FFCs) during removal or installation. Also, do
not straighten pre-folds in the FFCs. You must make sure that all FFCs are fully seated in their
connectors. Failure to fully seat an FFC into a connector can cause a short circuit in a PCA.
NOTE: Your product might not appear exactly as the one shown in the photos in this chapter. For
example, the color of the external panels and covers might be different than your product. However, this
does not affect the validity of the procedures in this chapter.
TIP: To install a self-tapping screw, first turn it counterclockwise to align it with the existing thread
pattern, and then carefully turn it clockwise to tighten. Do not overtighten.
48
Chapter 5 Removal and replacement
ENWW
Electrostatic discharge
CAUTION:
The product contains components that are sensitive to electrostatic discharge
(ESD). Always perform service work at ESD-protected workstation. If an ESD-protected workstation is
not available, discharge body static by grasping the print engine chassis before touching an ESDsensitive component. Ground the print engine chassis before servicing the product.
Required tools
●
#2 Phillips screwdriver with magnetic tip
●
Small flat-blade screwdriver
●
Long flat-blade screwdriver
●
Needle-nose pliers
●
ESD mat (if one is available)
●
Penlight (optional)
CAUTION: Always use a Phillips screwdriver (callout 1). Do not use a pozidrive screwdriver (callout 2)
or any motorized screwdriver. These can damage screws or screw threads.
Do not pull directly on the wires to disconnect them. Always pull on the plastic body of a connector to
avoid damaging the connector wires.
Figure 5-1 Phillips and pozidrive screwdriver comparison
Before performing service
ENWW
●
If possible, print a configuration page (to record customer settings) and menu map report. See
Information pages on page 30.
●
Remove all media from the product and remove the input tray.
●
Turn off the power by using the power switch.
●
Unplug the power and interface cables.
Removal and replacement strategy
49
●
Place the product on an ESD mat, if one is available. If an ESD-protected workstation is not
available, discharge body static and ground the print engine chassis before touching an ESDsensitive part.
●
Remove the print cartridge. See Print cartridge on page 25.
After performing service
50
●
Replace the print cartridge and input tray.
●
Reload the input tray with media.
●
Perform the post-service tests. See Post-service tests on page 51.
Chapter 5 Removal and replacement
ENWW
Post-service tests
After service has been completed, the following tests can be used to verify that the repair or replacement
was successful.
Test 1 (print-quality test)
1.
Verify that you have completed the necessary reassembly steps.
2.
Ensure that the input tray contains clean, unmarked paper.
3.
Attach the power cord and interface cable, and then turn on the product.
4.
Verify that the expected start-up sounds occur.
5.
Print a configuration page, and then verify that the expected printing sounds occur.
6.
Print a demo page, and then verify that the print quality is as expected.
7.
Send a print job from the host computer, and then verify that the output meets expectations.
8.
If necessary, restore any customer product settings.
9.
Clean the outside of the product with a damp cloth.
Test 2 (copy-quality test)
ENWW
1.
Verify that you have completed the necessary reassembly steps.
2.
Ensure that the input tray contains clean, unmarked paper.
3.
Attach the power cord and interface cable, and then turn on the product.
4.
Verify that the expected start-up sounds occur.
5.
Print a configuration page, and then verify that the expected printing sounds occur.
6.
Place the configuration page on the scanner glass.
7.
Print a copy job, and then verify the results.
8.
Clean the outside of the product with a damp cloth.
Removal and replacement strategy
51
Parts removal order
Use the following diagrams to determine which parts of the product must be removed before
servicing.
NOTE: The scanner assembly might be contaminated if it is opened outside of a cleanroom
environment. For this reason, the entire scanner assembly is replaceable only as a unit. Replacing the
scanner assembly as an entire assembly replaces the scan module, the scan motor, and the cable.
Figure 5-2 Parts removal order
Flatbed lid
Flatbed lid
Flatbed lid white plate
Link assemblies
and scanner
support-frame springs
Control-panel overlay
Control-panel assembly
Print car tridge
Transfer roller
Media input tray
Printer side covers
Rear cover and fuser cover
Power supply
Scanner assembly
Print-car tridge door
Front cover
Scanner suppor t-frame
Engine controller unit
Laser/scanner assembly
Main motor
Fuser assembly
Pickup assembly
Front cover
Formatter
52
Chapter 5 Removal and replacement
ENWW
Scanner assembly
NOTE: Your product might not appear exactly as the one shown in the photos in this chapter. For
example, the color of the external panels and covers might be different than your product. However, this
does not affect the validity of the procedures in this chapter.
Link assemblies and scanner support-frame spring
1.
Push the print-cartridge access button and raise the scanner assembly until it is locked open.
2.
Use a small flat-blade screwdriver to release the link tabs on each link assembly.
WARNING! When the link assemblies are disengaged, the scanner assembly can easily fall off
of the product base if it is rotated too far towards the back of the product.
CAUTION: Do not push too hard on the link tabs or the tabs might break.
Figure 5-3 Remove the link assemblies and scanner support-frame spring (1 of 4)
ENWW
Scanner assembly
53
3.
Rotate a link assembly toward the front of the product until the link disengages from the scanner
support frame.
Figure 5-4 Remove the link assemblies and scanner support-frame spring (2 of 4)
4.
Remove the link assembly. Repeat these steps to remove the remaining link.
Figure 5-5 Remove the link assemblies and scanner support-frame spring (3 of 4)
54
Chapter 5 Removal and replacement
ENWW
5.
Use needle-nose pliers to remove the scanner support-frame spring.
Figure 5-6 Remove the link assemblies and scanner support-frame spring (4 of 4)
ENWW
Scanner assembly
55
Scanner lid
1.
Open the scanner lid.
Figure 5-7 Remove the scanner lid (1 of 2)
2.
Lift the scanner lid straight up to remove it from the scanner assembly.
CAUTION: Avoid touching the flatbed glass. Skin oils and fingerprints can contaminate the glass
and cause print-quality problems.
Figure 5-8 Remove the scanner lid (2 of 2)
56
Chapter 5 Removal and replacement
ENWW
Control-panel overlay
Carefully pry the outside edge of the control-panel overlay away from the product to remove it.
CAUTION: Be careful to not damage the overlay if it will be reinstalled after servicing the device.
TIP: When installing a replacement control-panel overlay, you can dispose of the barcode part-number
portion of the replacement overlay.
Figure 5-9 Remove the control-panel overlay
ENWW
Scanner assembly
57
Control-panel assembly
CAUTION: The control-panel is an ESD-sensitive component.
1.
Remove the control-panel overlay. See Control-panel overlay on page 57.
2.
Remove one screw (callout 1).
Figure 5-10 Remove the control-panel assembly (1 of 3)
1
3.
Slide the control panel forward and slightly lift up the control panel.
Figure 5-11 Remove the control-panel assembly (2 of 3)
58
Chapter 5 Removal and replacement
ENWW
4.
Disconnect one FFC (callout 2). Remove the control-panel assembly.
CAUTION: Do not bend or fold the FFCs during the removal or reinstallation process.
Figure 5-12 Remove the control-panel assembly (3 of 3)
2
ENWW
Scanner assembly
59
Scanner assembly
CAUTION: Avoid touching the flatbed glass. Skin oils and fingerprints can contaminate the glass or
pad and cause print-quality or paper-pickup problems.
1.
Remove one screw (callout 1).
Figure 5-13 Remove the scanner assembly (1 of 10)
1
2.
Release one tab on the back side of the cover.
Figure 5-14 Remove the scanner assembly (2 of 10)
60
Chapter 5 Removal and replacement
ENWW
3.
Release the bottom tab (callout 2).
Figure 5-15 Remove the scanner assembly (3 of 10)
2
4.
Rotate the back side of the cover away from the product, and then slide the cover toward the front
of the product to remove it.
Figure 5-16 Remove the scanner assembly (4 of 10)
1
ENWW
2
Scanner assembly
61
5.
Push the print-cartridge door button to release the scanner assembly, and then raise the assembly
until it locks open.
Figure 5-17 Remove the scanner assembly (5 of 10)
6.
Disconnect two FFCs (callout 3; J10 and J12) on the formatter. Remove one FFC from the ferrite
(callout 4).
TIP: It might be easier to thread the FFC through the ferrite by removing one screw and the ferrite
(callout 4).
The ferrite is not captive in the bracket and can be dislodged when you remove the bracket.
Figure 5-18 Remove the scanner assembly (6 of 10)
4
3
62
Chapter 5 Removal and replacement
ENWW
7.
Grasp the tab on the gear-drive arm bracket and carefully flex it away from the scanner assembly
to release the bracket.
Figure 5-19 Remove the scanner assembly (7 of 10)
8.
Push the bracket toward the right side of the product until its mounting tabs clear the holes in the
scanner assembly.
Figure 5-20 Remove the scanner assembly (8 of 10)
ENWW
Scanner assembly
63
9.
Use a small flat-blade screwdriver to release the tabs on each link assembly.
WARNING! When the links are disengaged, the scanner assembly can easily fall off of the
product base if it is rotated too far toward the back of the product.
CAUTION: Do not push too hard on the link tabs or the tabs might break.
Figure 5-21 Remove the scanner assembly (9 of 10)
10. Rotate the scanner assembly toward the rear of the product until the rear hinges clear the chassis
hinge pins. Lift the scanner assembly off of the product base.
CAUTION: Make sure that the scanner lid is supported so that it does not swing open when you
remove the scanner assembly.
NOTE: Do not lose the two scanner cushions in the scanner support-frame corners when moving
the product base. See Scanner cushions on page 70.
Figure 5-22 Remove the scanner assembly (10 of 10)
64
Chapter 5 Removal and replacement
ENWW
Product base
NOTE: Your product might not appear exactly as the one shown in the photos in this chapter. For
example, the color of the external panels and covers might be different than your product. However, this
does not affect the validity of the procedures in this chapter.
Print cartridge
CAUTION: To prevent damage, do not expose the print cartridge to direct or bright light. Cover it with
a piece of paper.
1.
Push the print-cartridge-door release button and raise the scanner assembly until it locks open.
Figure 5-23 Remove the print cartridge (1 of 2)
2.
Pull the print cartridge up and out of the product.
Figure 5-24 Remove the print cartridge (2 of 2)
ENWW
Product base
65
Separation pad
1.
Position the product with the rear side facing you.
2.
Support the product and tip it forward. Remove two screws (callout 1).
Figure 5-25 Remove the separation pad (1 of 2)
1
3.
Remove the separation pad and frame.
Figure 5-26 Remove the separation pad (2 of 2)
66
Chapter 5 Removal and replacement
ENWW
Pickup roller
1.
Remove the print cartridge and locate the pickup roller. See Print cartridge on page 65.
Figure 5-27 Remove the pickup roller (1 of 5)
2.
Gently release the small, white tabs on each side of the pickup roller by pushing them away from
the roller, and then rotate the roller away from the mounting frame.
CAUTION: Do not touch the black-sponge transfer roller inside the product. Touching the transfer
roller can damage the product.
Use gentle pressure to release the small white tabs to avoid breaking them.
Figure 5-28 Remove the pickup roller (2 of 5)
ENWW
Product base
67
3.
Gently pull the roller up and out of the product.
Figure 5-29 Remove the pickup roller (3 of 5)
4.
Circular and rectangular pegs on each side of the pickup roller fit into corresponding slots on the
pickup-roller mounting frame and prevent the roller from being incorrectly installed. Position the
replacement pickup roller in the slots on the pickup-roller frame.
Figure 5-30 Remove the pickup roller (4 of 5)
68
Chapter 5 Removal and replacement
ENWW
5.
Rotate the top of the pickup roller into position until the white tabs on each side of the roller snap
into place.
Figure 5-31 Remove the pickup roller (5 of 5)
ENWW
Product base
69
Scanner cushions
1.
Open the print-cartridge door.
2.
Place a scanner cushion in each well on the scanner support frame (callout 1). Use the eraser-end
of a pencil or use an ink pen with the cap on to seat each cushion in its well.
Figure 5-32 Installing the scanner cushions
1
70
Chapter 5 Removal and replacement
ENWW
Media input tray
1.
Open the media input tray lid.
Figure 5-33 Remove the media input tray (1 of 3)
2.
Slide the adjustable media guides to the center of the tray.
Figure 5-34 Remove the media input tray (2 of 3)
ENWW
Product base
71
3.
Depress the pickup-tray locking tabs to release the media input tray, and then pull it out and away
from the product.
Figure 5-35 Remove the media input tray (3 of 3)
72
Chapter 5 Removal and replacement
ENWW
Transfer roller
CAUTION: Do not touch the black-sponge portion of the transfer roller. Skin oils deposited on the
transfer roller might cause print-quality problems.
1.
Open the print-cartridge door and remove the print cartridge.
2.
Release the two small tabs on the transfer roller and then slide the roller to the right to release the
left end of the roller shaft. Remove the transfer roller.
Figure 5-36 Remove the transfer roller
ENWW
Product base
73
Side covers
NOTE: The procedure for removing the right-side and left-side covers is identical. The right-side cover
is shown in the following procedure.
1.
Remove one screw (callout 1). Callout 2 is the left-side cover screw.
Figure 5-37 Remove the side covers (1 of 4)
2
1
2.
Release the locking tab on the back of the cover.
Figure 5-38 Remove the side covers (2 of 4)
74
Chapter 5 Removal and replacement
ENWW
3.
Release the bottom tab (callout 3).
Figure 5-39 Remove the side covers (3 of 4)
3
4.
Slightly rotate the back side of the right cover away from the product, and then slide it toward the
front of the product to release it.
Figure 5-40 Remove the side covers (4 of 4)
2
1
ENWW
Product base
75
Print-cartridge door
1.
Remove the scanner assembly. See Scanner assembly on page 60.
2.
Fully open the print-cartridge door and gently pull downward on both print-cartridge swing arms to
release them. (In Figure 5-41 Remove the print-cartridge door (1 of 2) on page 76, the left arm
is disengaged).
CAUTION: Be careful when releasing the swing arms. They can easily break.
Figure 5-41 Remove the print-cartridge door (1 of 2)
3.
Rotate the door toward the back of the product and then lift it up and off of the product.
Figure 5-42 Remove the print-cartridge door (2 of 2)
76
Chapter 5 Removal and replacement
ENWW
Rear cover and fuser cover
1.
Remove the right-side and left-side covers. See Side covers on page 74.
2.
Remove one screw (callout 1).
Figure 5-43 Remove the rear cover and fuser cover (1 of 3)
1
3.
Release the two rear-cover locking tabs (callout 2). Rotate the bottom of the rear cover up and
away from the product, and then remove it.
Figure 5-44 Remove the rear cover and fuser cover (2 of 3)
2
ENWW
Product base
77
4.
Rotate the bottom of the fuser cover away from the product, and then remove the fuser cover.
Figure 5-45 Remove the rear cover and fuser cover (3 of 3)
78
Chapter 5 Removal and replacement
ENWW
Front cover
1.
Remove the right-side and left-side covers. See Side covers on page 74.
2.
Release the lower left-side front-cover locking tab and slightly pry the lower-left corner of the front
cover away from the product.
Figure 5-46 Remove the front cover (1 of 4)
3.
Release the lower right-side front-cover locking tab (located near the corner of the power supply)
and slightly pry the lower-right corner of the front cover away from the product.
Figure 5-47 Remove the front cover (2 of 4)
ENWW
Product base
79
4.
Rotate the bottom of the front cover away from the product to release it.
Figure 5-48 Remove the front cover (3 of 4)
5.
Remove the front cover.
Figure 5-49 Remove the front cover (4 of 4)
80
Chapter 5 Removal and replacement
ENWW
Formatter
CAUTION: The formatter is an ESD-sensitive device.
1.
Remove the left cover. See Side covers on page 74.
2.
Disconnect all FFCs and wire harnesses from the formatter.
CAUTION: Do not bend or fold the FFCs during the removal or reinstallation process.
NOTE: The scanner assembly is shown removed in this procedure. If the scanner assembly is
installed, there will be additional FFCs connected to the formatter. You do not need to remove the
scanner assembly to remove the formatter.
3.
Remove four screws from the formatter PCA (callout 1). Remove the formatter.
Figure 5-50 Remove the formatter
1
ENWW
Product base
81
Power supply
1.
2.
Remove the following assemblies:
●
Right and left covers. See Side covers on page 74.
●
Rear cover and fuser cover. See Rear cover and fuser cover on page 77.
●
Front cover. See Front cover on page 79.
●
Formatter. See Formatter on page 81.
Disconnect one spade connector (callout 1) and remove three screws (callout 2).
Figure 5-51 Remove the power supply (1 of 7)
1
2
3.
Remove six screws (callout 3) and the sheet-metal plate (callout 4).
Figure 5-52 Remove the power supply (2 of 7)
4
3
2
82
Chapter 5 Removal and replacement
ENWW
4.
Disconnect three FFCs (callout 5) and six wire-harness connectors (callout 6).
CAUTION: Do not bend or fold the FFCs during the removal or reinstallation process.
Figure 5-53 Remove the power supply (3 of 7)
6
6
5
6
6
5.
Release the ground wire from the retainer (callout 7) on the product chassis.
NOTE: You might need to slightly pry up on the scanner support frame to release the wire from
the retainer.
Figure 5-54 Remove the power supply (4 of 7)
7
ENWW
Product base
83
6.
Release the wire harness from the retainer (callout 8) on the power supply.
Figure 5-55 Remove the power supply (5 of 7)
8
7.
Unclip two clips (callout 9) and remove one plastic bracket (callout 10).
CAUTION: The wire harness (callout 11) attached to the bracket is not captive. Do not lose this
wire harness when the bracket is removed.
Figure 5-56 Remove the power supply (7 of 7)
9
10
11
84
Chapter 5 Removal and replacement
ENWW
8.
Remove three screws (callout 12). Remove the power supply.
Figure 5-57 Remove the power supply (7 of 7)
12
ENWW
Product base
85
Scanner support frame
1.
2.
Remove the following assemblies:
●
Scanner assembly. See Scanner assembly on page 60.
●
Right and left cover. See Side covers on page 74.
●
Print-cartridge door. See Print-cartridge door on page 76.
●
Rear cover and fuser cover. See Rear cover and fuser cover on page 77.
●
Front cover. See Front cover on page 79.
Remove six screws (callout 1).
CAUTION: Be careful not to drop any screws into the product.
NOTE: If you turn over the scanner support frame after you remove it, the two scanner cushions
(callout 2) might fall out and be misplaced.
Figure 5-58 Remove the scanner support frame (1 of 5)
1
2
86
Chapter 5 Removal and replacement
ENWW
3.
Rotate the gear-drive bracket until the retainer on the gear-drive arm aligns with the opening in the
bracket, and remove the bracket.
Figure 5-59 Remove the scanner support frame (2 of 5)
4.
Remove one screw (callout 3) and the ferrite and bracket (callout 4).
CAUTION: The ferrite is not captive in the bracket and can be dislodged when you remove the
bracket.
Figure 5-60 Remove the scanner support frame (3 of 5)
3
ENWW
4
Product base
87
5.
Lift the scanner support frame up and off of the product.
Figure 5-61 Remove the scanner support frame (4 of 5)
6.
If you are removing the scanner support frame to gain access to the fuser, remove two screws
(callout 5) and the chassis reinforcement bracket (callout 6).
Figure 5-62 Remove the scanner support frame (5 of 5)
6
5
88
Chapter 5 Removal and replacement
ENWW
Laser/scanner assembly
1.
2.
Remove the following assemblies:
●
Scanner assembly. See Scanner assembly on page 60.
●
Right and left cover. See Side covers on page 74.
●
Print-cartridge door. See Print-cartridge door on page 76.
●
Rear cover and fuser cover. See Rear cover and fuser cover on page 77.
●
Front cover. See Front cover on page 79.
●
Scanner support frame. See Scanner support frame on page 86.
Remove three screws (callout 1) and one sheet-metal bracket (callout 2).
Figure 5-63 Remove the laser/scanner (1 of 7)
1
2
ENWW
1
Product base
89
3.
Release one tab and one spring (callout 3) and then remove right-side scanner-assembly locking
lever.
Figure 5-64 Remove the laser/scanner (2 of 7)
3
4.
Push the shaft to the left to disengage it (you might need to release the left-side locking-lever
spring), and then rotate the shaft towards the front of the product until the left-side scannerassembly locking lever is in the down position.
NOTE: When the shaft is reinstalled, make sure that the locking levers and the cartridge-door
button (mounted to the shaft near the right-side locking lever) are correctly positioned. Verify that
the locking-lever tension springs are engaged in the slots in the chassis.
Figure 5-65 Remove the laser/scanner (3 of 7)
1
2
90
Chapter 5 Removal and replacement
ENWW
5.
Lift the laser/scanner cover up and out of the product to remove it.
NOTE: When this cover is reinstalled, make sure that the slots in the lower portion of the cover
(callout 4; one shown) fit over the edge of the laser/scanner mounting shelf so that the cover is
secure and correctly fits inside the product.
Figure 5-66 Remove the laser/scanner (4 of 7)
4
6.
Disconnect one FFC (callout 5).
CAUTION: Do not bend or fold the FFCs during the removal or reinstallation process.
Figure 5-67 Remove the laser/scanner assembly (5 of 7)
5
ENWW
Product base
91
7.
Remove four screws (callout 6).
NOTE: These four screws are longer than most of the screws used in the product. Do not get
them mixed up with screws from previously removed components.
Figure 5-68 Remove the laser/scanner assembly (6 of 7)
6
8.
Carefully slide the laser/scanner assembly away from the main-motor PCA bracket, and then
disconnect one wire-harness connector (callout 7). Remove the laser/scanner assembly.
Figure 5-69 Remove the laser/scanner assembly (7 of 7)
7
92
Chapter 5 Removal and replacement
ENWW
Main motor
1.
2.
Remove the following assemblies:
●
Scanner assembly. See Scanner assembly on page 60.
●
Formatter. See Formatter on page 81.
●
Right and left cover. See Side covers on page 74.
●
Print-cartridge door. See Print-cartridge door on page 76.
●
Rear cover and fuser cover. See Rear cover and fuser cover on page 77.
●
Front cover. See Front cover on page 79.
●
Scanner support frame. See Scanner support frame on page 86.
●
Laser/scanner assembly. See Laser/scanner assembly on page 89.
Remove one screw (callout 1), and then carefully disconnect one wire-harness connector (callout
2).
Figure 5-70 Remove the main motor (1 of 4)
1
2
ENWW
Product base
93
3.
Carefully release two tabs (callout 3) and separate the main motor PCA from the mounting bracket.
Figure 5-71 Remove the main motor (2 of 4)
3
4.
Remove the main-motor wire harness from the retainers on the mounting bracket (callout 4).
Remove the bracket (callout 5).
Figure 5-72 Remove the main motor (3 of 4)
4
5
94
Chapter 5 Removal and replacement
ENWW
5.
Remove two screws (callout 6). Carefully slip the main-motor drive belt off of the motor shaft
(callout 7), and then remove the main motor.
Figure 5-73 Remove the main motor (4 of 4)
6
7
TIP: When the main motor is reinstalled, make sure that the wire harness is located toward the
top of the motor so that the harness can be correctly positioned in the retainers on the motor PCA
mounting bracket.
When you reinstall the main-motor drive belt, make sure that it is correctly positioned on top of the
spring-loaded tension idler and that it is not twisted (the grooves in the belt should face inwards
when the belt is correctly positioned).
Make sure that the FFC that is attached to the motor PCA is correctly positioned under the lower
motor mounting bracket so that it will not interfere with the fan blade on the rear of the motor shaft.
ENWW
Product base
95
Fuser
1.
2.
Remove the following assemblies:
●
Scanner assembly. See Scanner assembly on page 60.
●
Right and left covers. See Side covers on page 74.
●
Print-cartridge door. See Print-cartridge door on page 76.
●
Rear cover and fuser cover. See Rear cover and fuser cover on page 77.
●
Front cover. See Front cover on page 79.
●
Formatter. See Formatter on page 81.
●
Scanner support frame and chassis reinforcement plate. See Scanner support frame
on page 86.
Remove six screws (callout 1) and the power supply sheet-metal plate (callout 2).
Figure 5-74 Remove the fuser (1 of 6)
2
1
2
96
Chapter 5 Removal and replacement
ENWW
3.
Disconnect two wire-harness connectors (callout 3; J102, and J552) and remove the harnesses
from the retainer (callout 4).
NOTE: You might need to disconnect and remove the other wire harnesses to remove the
required harness from the retainer.
Figure 5-75 Remove the fuser (2 of 6)
4
3
4.
Release the wire harness from the retainer near the top of the fuser (callout 5) and disconnect the
ground wire (callout 6) from the back of the product.
Figure 5-76 Remove the fuser (3 of 6)
5
6
ENWW
Product base
97
5.
Release one tab (callout 7) and then remove the wire-harness retainer (callout 8).
Figure 5-77 Remove the fuser (4 of 6)
8
7
6.
Remove three screws (callout 9).
Figure 5-78 Remove the fuser assembly (5 of 6)
9
98
Chapter 5 Removal and replacement
ENWW
7.
Lift up the right side of the fuser assembly to release it from the chassis, and then remove the fuser
assembly.
Figure 5-79 Remove the fuser assembly (6 of 6)
NOTE: When replacing the fuser assembly, be sure to transfer the delivery-sensor PCA from the old
fuser to the new one.
ENWW
Product base
99
Paper-pickup assembly
1.
2.
Remove the following assemblies:
●
Separation pad. See Separation pad on page 66.
●
Scanner assembly. See Scanner assembly on page 60.
●
Transfer roller. See Transfer roller on page 73.
●
Right and left cover. See Side covers on page 74.
●
Print-cartridge door. See Print-cartridge door on page 76.
●
Rear cover and fuser cover. See Rear cover and fuser cover on page 77.
●
Front cover. See Front cover on page 79.
●
Formatter. See Formatter on page 81.
●
Fuser. See Fuser on page 96.
Release one tab (callout 1). Rotate the paper-pickup drive-shaft locking clip until the clip retainers
align with the holes in the chassis, and then remove the clip.
Figure 5-80 Remove the paper-pickup assembly (1 of 4)
1
100 Chapter 5 Removal and replacement
ENWW
3.
Disconnect two wire harnesses (callout 2; J551 and J556).
Figure 5-81 Remove the paper-pickup assembly (2 of 4)
2
4.
Remove six screws (callout 3).
Figure 5-82 Remove the paper-pickup assembly (3 of 4)
3
ENWW
Product base 101
5.
Separate the assembly from the chassis, and then remove it.
Figure 5-83 Remove the paper-pickup assembly (4 of 4)
102 Chapter 5 Removal and replacement
ENWW
Drive-gear assembly and drive belt
1.
Release one tab (callout 1). Rotate the paper-pickup drive-shaft locking clip until the clip retainers
align with the holes in the chassis, and then remove the clip.
Figure 5-84 Remove the drive-gear assembly and drive belt (1 of 4).
1
2.
Carefully slip the drive belt off of the motor shaft (callout 2), and then remove four screws (callout 3).
Figure 5-85 Remove the drive-gear assembly and drive belt (2 of 4).
2
3
ENWW
Product base 103
3.
Remove the drive-gear assembly.
CAUTION: Not all of the gears and springs are captive when you remove the drive-gear
assembly. Make sure that you do not lose any of the springs or gears when the assembly is
removed.
Figure 5-86 Remove the drive-gear assembly and drive belt (3 of 4).
4.
Remove one gear (callout 4), and then carefully slip the drive belt (callout 5) off of the drive gear.
TIP: When you reinstall the main-motor drive belt, make sure that it is correctly positioned on top
of the spring-loaded tension idler and that it is not twisted (the grooves in the belt should face
inwards when the belt is correctly positioned).
Figure 5-87 Remove the Drive-gear assembly and drive belt (4 of 4).
5
4
104 Chapter 5 Removal and replacement
ENWW
6
ENWW
Problem solve
●
Problem-solving checklist
●
Control-panel messages
●
Clear jams
●
Print problems
●
Scan problems
●
Copy problems
●
Functional checks
●
Service-mode functions
●
Problem-solving tools
●
Problem-solving diagrams
●
Firmware updates
105
Problem-solving checklist
Follow these steps when trying to solve a problem with the product.
Step
number
Verification step
Possible problems
Solutions
1
Is the power on?
No power due to failed power source, cable,
switch, or fuse.
1.
Verify that the product is plugged in.
2.
Verify that the power cable is functional
and that the power switch is on.
3.
Check the power source by plugging
the product directly into the wall or into
a different outlet.
2
Does Ready appear in the
product control panel?
Control panel shows an error.
See Control-panel messages on page 108
for a list of common messages that will help
you correct the error.
An error message appears on the controlpanel display.
See Control-panel messages on page 108
for a list of common messages that will help
you correct the error.
Paper jams when printing.
Make sure that media that meets
HP specifications.
The control panel should
function without error
messages.
3
Do information pages print?
Print a configuration page.
Clean the paper path. See Clean the paper
path on page 29.
4
Does the product copy?
Place the configuration page
onto the flatbed scanner and
make a copy. The copies
should print without printquality problems.
5
Paper jams when printing.
Make sure that media that meets
HP specifications.
Clean the paper path. See Clean the paper
path on page 29.
Poor copy quality from the flatbed.
1.
Clean the flatbed glass. See Clean the
flatbed scanner glass on page 28.
2.
If, after performing the maintenance,
the problem persists, see Copy
problems on page 127.
Does the product print from
the computer?
Software is not installed correctly or an error
occurred during software installation.
Use a word-processing
program to send a print job to
the product.
Uninstall and then reinstall the product
software. Verify that you are using the
correct installation procedure and the
correct port setting.
The cable is not connected correctly.
Reconnect the cable.
An incorrect driver is selected.
Select the proper driver.
There is a port driver problem in Microsoft
Windows.
Uninstall and then reinstall the product
software. Verify that you are using the
correct installation procedure and the
correct port setting.
106 Chapter 6 Problem solve
ENWW
Step
number
Verification step
Possible problems
Solutions
6
Does the product scan to the
computer?
The cable is not connected correctly.
Reconnect the cable.
Software is not installed correctly or an error
occurred during software installation.
Uninstall and then reinstall the product
software. Verify that you are using the
correct installation procedure and the
correct port setting.
Initiate a scan from the basic
desktop software at your
computer.
If the error persists, turn off the product and then turn on the product.
ENWW
Problem-solving checklist 107
Control-panel messages
The majority of the control-panel messages are intended to guide the user through typical operation.
The control-panel messages indicate the status of the current operation, and include a page count on
the second line of the display, if appropriate. When the product is receiving print data or scanning
commands, control-panel messages indicate this status. In addition, alert messages, warning
messages, and critical error messages indicate situations that might require some action.
Alert and warning messages
Alert and warning messages appear temporarily and might require the user to acknowledge the
message by pressing OK to resume or by pressing Cancel to cancel the job. With certain warnings, the
job might not complete or the print quality might be affected. If the alert or warning message is related
to printing and the auto-continue feature is on, the product will attempt to resume the printing job after
the warning has appeared for 10 seconds without acknowledgement.
Alert and warning message tables
Control panel message
Description
Recommended action
Device error
The product experienced an internal
communication error.
This is a warning message only. Job output
might be affected.
The product has detected a jam in the paper
path.
Clear the jam from the area indicated on the
product control panel, and then follow the
control-panel instructions. See Clear jams
on page 111.
The product could not print the current page
because of its complexity.
Press OK to clear the message.
Press [OK]
Jam in print paper path
alternates with
Open door and clear jam
Page too complex
Press [OK]
Printer jam
Allow the product to finish the job, or press
Cancel to cancel the job.
The product has detected a jam in the input
trays.
Clear the jam from the area indicated on the
product control panel, and then follow the
control panel instructions. See Clear jams
on page 111.
The product has cleared job settings.
Re-enter any appropriate job settings.
clear paper path
Settings cleared
108 Chapter 6 Problem solve
ENWW
Critical error messages
Critical error messages can indicate some kind of failure. Turning off and then turning on the power
might fix the problem. If a critical error persists, the product might require service.
Critical error message-tables
Control panel message
Description
Recommended action
50.1 Fuser Error
The product has experienced an internal
hardware error.
1.
Turn off the power by using the power
switch, and then wait at least 30
seconds.
2.
If a surge protector is being used,
remove it. Plug the product directly into
the wall socket.
3.
Turn on the power and wait for the
product to initialize.
Turn off then on
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
50.2 Fuser Error
The product has experienced an internal
hardware error.
Turn off then on
Turn off the power by using the power switch,
wait at least 30 seconds, and then turn on the
power and wait for the product to initialize.
If a surge protector is being used, remove it.
Plug the product directly into the wall socket.
Use the power switch to turn the product on.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
50.3 Fuser Error
The product has experienced an internal
hardware error.
Turn off then on
Turn off the power by using the power switch,
wait at least 30 seconds, and then turn on the
power and wait for the product to initialize.
If a surge protector is being used, remove it.
Plug the product directly into the wall socket.
Use the power switch to turn the product on.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
50.8 Fuser Error
The product has experienced an internal
hardware error.
Turn off then on
Turn off the power by using the power switch,
wait at least 30 seconds, and then turn on the
power and wait for the product to initialize.
If a surge protector is being used, remove it.
Plug the product directly into the wall socket.
Use the power switch to turn the product on.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
50.9 Fuser Error
Turn off then on
ENWW
The product has experienced an internal
hardware error.
Turn off the power by using the power switch,
wait at least 30 seconds, and then turn on the
power and wait for the product to initialize.
Control-panel messages 109
Control panel message
Description
Recommended action
If a surge protector is being used, remove it.
Plug the product directly into the wall socket.
Use the power switch to turn the product on.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
52 Scanner Error
The product has experienced a scanner
error.
Turn off then on
Turn off the power by using the power switch,
wait at least 30 seconds, and then turn on the
power and wait for the product to initialize.
If a surge protector is being used, remove it.
Plug the product directly into the wall socket.
Use the power switch to turn the product on.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
54.1C Error
The product has experienced an internal
hardware error.
Turn off then on
Turn off the power by using the power switch,
wait at least 30 seconds, and then turn on the
power and wait for the product to initialize.
If a surge protector is being used, remove it.
Plug the product directly into the wall socket.
Use the power switch to turn the product on.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
Engine comm. Error
The product has experienced an internal
hardware error.
1.
Turn off the power by using the power
switch, and then wait at least 30
seconds.
2.
If a surge protector is being used,
remove it. Plug the product directly into
the wall socket.
3.
Turn on the power and wait for the
product to initialize.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
110 Chapter 6 Problem solve
ENWW
Clear jams
Causes of jams
Occasionally, paper or other print media can become jammed during a print job. Some causes include
the following events:
ENWW
●
The input trays are loaded improperly or overfilled, or the media guides are not set properly.
●
Media is added to or removed from an input tray during a print job or an input tray is removed from
the product during a print job.
●
The cartridge door is opened during a print job.
●
Too many sheets have accumulated in an output area, or sheets are blocking an output area.
●
The print media that is being used does not meet HP specifications.
●
The media is damaged or has foreign objects attached to it, such as staples or paper clips.
●
The environment in which the print media was stored is too humid or too dry.
Clear jams 111
Where to look for jams
Jams can occur in these locations:
●
In input areas
●
In output areas
●
In the print-cartridge area
Find and remove the jam by using the instructions on the following pages. If the location of the jam is
not obvious, first look inside the product.
Loose toner might remain in the product after a jam. This problem typically resolves itself after a few
sheets have been printed.
Clear jams from the input-tray areas
CAUTION: Do not use sharp objects, such as tweezers or needle-nose pliers, to remove jams.
Damage caused by sharp objects will not be covered by the warranty.
When removing jammed media, pull the jammed media straight away from the product. Pulling jammed
media out of the product at an angle can damage the product.
NOTE: Depending on where the jam is located, some of the following steps might not be necessary.
1.
Open the print-cartridge door.
2.
Grasp the handle on the print cartridge, and then pull the cartridge straight out to remove it.
112 Chapter 6 Problem solve
ENWW
ENWW
3.
With both hands, grasp the side of the media that is most visible (this includes the middle), and
carefully pull it free from the product.
4.
Open tray 1 and remove the media stack.
5.
With both hands, grasp the side of the jammed media that is most visible (this includes the middle),
and carefully pull it free from the product.
Clear jams 113
6.
Replace the print cartridge and close the print-cartridge door.
114 Chapter 6 Problem solve
ENWW
Clear jams from the output bin
CAUTION: Do not use sharp objects, such as tweezers or needle-nose pliers, to remove jams.
Damage caused by sharp objects will not be covered by the warranty.
With both hands, grasp the side of the jammed media that is most visible (this includes the middle), and
carefully pull it free from the product.
ENWW
Clear jams 115
Clear jams from the print-cartridge area
CAUTION: Do not use sharp objects, such as tweezers or needle-nose pliers, to remove jams.
Damage caused by sharp objects will not be covered by the warranty.
When removing jammed media, pull the jammed media straight away from the product. Pulling jammed
media out of the product at an angle can damage the product.
1.
Open the print-cartridge door, and remove the print cartridge.
CAUTION: To prevent damage to the print cartridge, minimize its exposure to direct light.
2.
With both hands, grasp the side of the jammed media that is most visible (this includes the middle),
and carefully pull it free from the product.
3.
Replace the print cartridge and close the print-cartridge door.
116 Chapter 6 Problem solve
ENWW
Avoid repeated jams
ENWW
●
Verify that the input tray is not overfilled. The input tray capacity varies depending on the type of
print media that you are using.
●
Verify that the media guides are properly adjusted.
●
Check that the input tray is securely in place.
●
Do not add print media into the input tray while the product is printing.
●
Use only HP-recommended media types and sizes.
●
Do not fan media prior to loading it in a tray. To loosen the ream, hold it firmly in both hands and
twist the media by rotating your hands in the opposite direction.
●
Do not let print media stack up in the output bin. The print media type and the amount of toner used
affect the output bin capacity.
●
Check the power connection. Make sure that the power cord is firmly connected to both the product
and the power supply box. Plug the power cord into a grounded power outlet.
Clear jams 117
Print problems
Print-quality problems
The information in the following sections helps you identify and resolve print-quality issues.
NOTE: If you are having copy problems, see Copy problems on page 127.
Improve print quality
Use the print-quality settings to prevent print-quality problems.
Print-quality settings
Print-quality settings affect how light or dark the print is on the page and the style in which the graphics
are printed. You can also use the print-quality settings to optimize the print quality for a specific media
type.
You can change the settings in the product properties to accommodate the types of jobs that you are
printing. The following settings are available, depending on the printer driver that you are using:
●
600 dpi
●
FastRes 1200
NOTE: Changing the resolution can change the formatting of your text.
Temporarily change print-quality settings
To change the print-quality settings only for the current software program, open the properties through
the Print Setup menu in the program that you are using to print.
Change print-quality settings for all future jobs
NOTE: For Macintosh instructions, see the user guide.
For Windows 2000:
1.
In the Windows system tray, click Start, select Settings, and then click Printers.
2.
Right-click the product icon.
3.
Click Properties (in Windows 2000, you can also click Printing Preferences).
4.
Change the settings, and then click OK.
For Windows XP:
1.
In the Windows system tray, click Start, click Control Panel, and then click Printers and Faxes.
2.
Right-click the product icon.
3.
Click Properties, or click Printing Preferences.
4.
Change the settings, and then click OK.
118 Chapter 6 Problem solve
ENWW
For Windows Vista:
1.
In the Windows system tray, click Start, click Control Panel, and then click Printer.
2.
Right-click the product icon.
3.
Click Properties, or click Printing Preferences.
4.
Change the settings, and then click OK.
Identify and correct print defects
Use the checklist and print-quality issues charts in this section to solve print-quality problems.
Print-quality checklist
General print-quality problems can be solved by using the following checklist:
ENWW
1.
Make sure that the paper or print media that you are using meets specifications. Generally,
smoother paper provides better results.
2.
If you are using a special print media such as labels, transparencies, glossy, or letterhead, ensure
that you have printed by type.
3.
Print a configuration page at the product control panel. If the page does not print correctly, the
problem is with the hardware. Contact HP. See www.hp.com/support/LJM1120 or the support flyer
that came in the product box.
4.
Print a demo page at the control panel. If the page prints, the problem is with the printer driver. Try
printing from another printer driver.
5.
Try printing from a different program. If the page prints correctly, the problem is with the program
from which you were printing.
6.
Restart the computer and the product, and then try printing again. If the problem is not resolved,
see General print-quality issues on page 120.
Print problems 119
General print-quality issues
The following examples depict letter-size paper that has passed through the product short-edge-first.
These examples illustrate problems that would affect all of the pages that you print. The topics that follow
list the typical cause and solution for each of these examples.
Problem
Print is light or faded.
Toner specks appear.
Dropouts appear.
Example
Cause
Solution
The media might not meet
HP specifications.
Use media that meets
HP specifications.
The print cartridge might be
defective. If you use a nonHP print cartridge, no messages
appear on the product control
panel.
Replace the print cartridge. See
Print cartridge on page 25.
If the whole page is light, the print
density adjustment is too light or
EconoMode might be turned on.
Adjust the print density, and
disable EconoMode in the
product Properties.
The media might not meet
HP specifications.
Use media that meets
HP specifications.
The paper path might need
cleaning.
Clean the paper path. See Clean
the paper path on page 29.
A single sheet of print media might
be defective.
Try reprinting the job.
The moisture content of the paper
is uneven or the paper has moist
spots on its surface.
Try different paper, such as highquality paper that is intended for
laser printers.
If the print cartridge is not low or
empty, inspect the toner roller to
see if the roller is damaged. If it is,
replace the print cartridge.
The paper lot is flawed. The
manufacturing processes can
cause some areas to reject toner.
The print cartridge might be
defective.
Replace the print cartridge. See
Print cartridge on page 25.
If the error persists, contact HP.
See www.hp.com/support/
LJM1120 or the support flyer that
came in the product box.
Vertical streaks or bands
appear on the page.
120 Chapter 6 Problem solve
The print cartridge might be
defective. If you are using a nonHP print cartridge, no messages
appear on the product control
panel.
Replace the print cartridge. See
Print cartridge on page 25.
ENWW
Problem
The amount of
background toner
shading becomes
unacceptable.
Toner smears appear on
the media.
The toner smears easily
when touched.
ENWW
Example
Cause
Solution
The media might not meet
HP specifications.
Use a different paper with a lighter
basis weight.
The priority input tray might be
installed incorrectly.
Make sure that the priority input
tray is in place.
The print-density setting is too
high.
Decrease the print-density setting
through the print driver. This
decreases the amount of
background shading.
Very dry (low humidity) conditions
can increase the amount of
background shading.
Check the product environment.
The print cartridge might be
defective. If you are using a nonHP print cartridge, no messages
appear on the product control
panel.
Replace the print cartridge. See
Print cartridge on page 25.
The media might not meet
HP specifications.
Use media that meets
HP specifications.
If toner smears appear on the
leading edge of the paper, the
media guides are dirty, or debris
has accumulated in the print path.
Clean the media guides and the
paper path. See Clean the paper
path on page 29.
The fuser temperature might be
too low.
In the printer driver, make sure
the appropriate media type is
selected.
The product is not set to print on
the type of media on which you
want to print.
In the printer driver, select the
Paper/Quality tab and set Paper
Type to match the type of media
on which you are printing. Print
speed might be slower if you are
using heavy paper.
The media might not meet
HP specifications.
Use media that meets
HP specifications.
The paper path might need
cleaning.
Clean the paper path. See Clean
the paper path on page 29.
The power source might be
defective.
Plug the product directly into an
AC outlet instead of into a power
strip.
The fuser temperature might be
too low.
Use the archive print feature to
improve toner fusing.
Print problems 121
Problem
Marks repeatedly appear
at even intervals on the
page.
The printed page contains
misformed characters.
The printed page is curled
or wavy.
Example
Cause
Solution
The product is not set to print on
the type of media on which you
want to print.
In the printer driver, make sure
that the appropriate media type is
selected. Print speed might be
slower if you are using heavy
paper.
Internal parts might have toner on
them.
The problem typically corrects
itself after a few more pages.
The paper path might need
cleaning.
Clean the paper path. See Clean
the paper path on page 29.
The print cartridge might be
damaged.
If a repetitive mark occurs at the
same spot on the page, install a
new HP print cartridge. See Print
cartridge on page 25.
The media might not meet
HP specifications.
Use a different paper, such as
high-quality paper that is intended
for laser printers.
If characters are incorrectly
formed so that they produce a
wavy effect, the laser scanner
might need service.
Verify that the problem also
occurs on the configuration page.
If so, contact HP. See
www.hp.com/support/LJM1120
or the support flyer that came in
the product box.
The product is not set to print on
the type of media on which you
want to print.
In the printer driver, make sure
the appropriate media type is
selected.
If the problem persists, select a
media type that uses a lower fuser
temperature, such as
transparencies or light media.
Text or graphics are
skewed on the printed
page.
122 Chapter 6 Problem solve
The media might have been in the
input tray too long.
Turn over the stack of media in
the tray. Also, try rotating the
media 180° in the input tray.
The media might not meet
HP specifications.
Use a different paper, such as
high-quality paper that is intended
for laser printers.
Both high temperature and
humidity can cause paper curl.
Check the product environment.
The media might be loaded
incorrectly or the input tray might
be too full.
Verify that the media is loaded
correctly and that the media
guides are not too tight or too
loose against the stack. See
Install input devices on page 19.
The media might not meet
HP specifications.
Use a different paper, such as
high-quality paper that is intended
for laser printers.
ENWW
Problem
The printed page contains
wrinkles or creases.
Example
Cause
Solution
The media might be loaded
incorrectly or the input tray might
be too full.
Turn over the stack of paper in the
input tray, or try rotating the paper
180° in the input tray.
Verify that the media is loaded
correctly and that the media
guides are not too tight or too
loose against the stack. See
Install input devices on page 19.
Toner appears around the
printed characters.
An image that appears at
the top of the page (in
solid black) repeats
farther down the page (in
a gray field).
The media might not meet
HP specifications.
Use a different paper, such as
high-quality paper that is intended
for laser printers.
Air pockets inside envelopes can
cause them to wrinkle.
Remove the envelope, flatten it,
and try printing again.
The media might be loaded
incorrectly.
Turn over the stack of paper in the
tray.
If large amounts of toner have
scattered around the characters,
the paper might have high
resistivity.
Use a different paper, such as
high-quality paper that is intended
for laser printers.
Software settings might affect
image printing.
In your software program, change
the tone (darkness) of the field in
which the repeated image
appears.
In your software program, rotate
the whole page 180° to print the
lighter image first.
The order of images printed might Change the order in which the
affect printing.
images are printed. For example,
have the lighter image at the top
of the page, and the darker image
farther down the page.
A power surge might have affected
the product.
ENWW
If the defect occurs later in a print
job, turn the product off for 10
minutes, and then turn on the
product to restart the print job.
Print problems 123
Scan problems
Solve scanned-image problems
Problem
Cause
Solution
The scanned image is of poor
quality.
The original might be a second-generation
photo or picture.
●
To eliminate the patterns, try reducing
the size of the image after scanning.
●
Print the scanned image to see if the
quality is better.
●
Verify that the resolution settings are
correct for the type of scan job that you
are performing.
●
Try adjusting your computer monitor
settings to use more colors (or levels of
gray). Typically, you make this
adjustment by opening Display in
Windows Control Panel.
●
Try adjusting the resolution settings in
the scanner software.
The image that appears on the screen might
not be an accurate representation of the
quality of the scan.
Part of the image did not scan.
124 Chapter 6 Problem solve
The original might have been loaded
incorrectly.
Verify that the original is loaded correctly on
the flatbed scanner. See Install input
devices on page 19.
The scanner might be dirty.
Clean the scanner. See Clean the flatbed
scanner glass on page 28.
The graphics settings might not be suitable
for the type of scan job that you are
performing.
Try changing the graphics settings.
The original might have been loaded
incorrectly.
Verify that the original is loaded correctly on
the flatbed scanner.
A colored background might be causing
images in the foreground to blend into the
background.
Try adjusting the settings before you scan
the original or enhancing the image after you
scan the original.
The original is too small.
The minimum size that the flatbed scanner
supports is 25 x 25 mm (1 x 1 inch).
The media size is incorrect.
In Scan settings, make sure that the input
media size is large enough for the document
that you are scanning. .
ENWW
ENWW
Problem
Cause
Solution
The scan takes too long
The resolution or color level is set too high.
Change the resolution and color settings to
the correct settings for your job.
The software is set to scan in color.
The system default is color, which takes
longer to scan even when scanning a
monochrome original. If you acquire an
image through TWAIN or WIA, you can
change the settings so that the original
scans in grayscale or black-and-white. See
the product software Help for details.
A print job or copy job was sent before you
tried to scan.
If someone sent a print job or copy job before
you tried to scan, the scan will start if the
scanner is not busy. However, because the
product and scanner share memory, the
scan might be slower.
Scan problems 125
Scan-quality problems
Prevent problems
The following are a few simple steps you can take to improve copy and scan quality.
●
Use high-quality originals.
●
Place the media on the flatbed glass correctly (face-down with the upper-left corner of the document
at the corner of the glass indicated by the icon).
●
Adjust the software settings according to how you plan to use the scanned page.
●
If your product frequently feeds more than one page at a time, the separation pad might need to
be replaced. Contact HP. See www.hp.com/support/LJM1120 or the support flyer that came in the
product box.
●
Use or make a carrier sheet to protect your originals.
Solve scan-quality problems
Problem
Cause
Solution
Blank pages
The original might have been loaded upside
down.
On the flatbed scanner, place the original
document face-down with the upper-left
corner of the document at the corner of the
glass indicated by the icon on the scanner.
Too light or dark
The resolution and color levels may be set
incorrectly.
Verify that you have the correct resolution
and color settings.
Unwanted spots
Ink, glue, correction fluid, or an unwanted
substance might be on the glass.
Clean the flatbed scanner surface. See
Clean the flatbed scanner glass
on page 28.
Black dots
Ink, glue, correction fluid, or an unwanted
substance might be on the glass.
Clean the flatbed scanner surface. See
Clean the flatbed scanner glass
on page 28.
The power to the product might have
fluctuated.
Reprint the job.
The resolution levels might be set
incorrectly.
Verify that the correct resolution settings are
correct.
Unclear text
126 Chapter 6 Problem solve
ENWW
Copy problems
Prevent problems
The following are a few simple steps you can take to improve copy quality:
●
Use quality originals.
●
Place the media on the flatbed glass correctly (face-down with the upper-left corner of the document
at the corner of the glass indicated by the icon).
●
Use or make a carrier sheet to protect your originals.
NOTE: Verify that the media meets HP specifications. If the media meets HP specifications, recurring
feed problems indicate the pickup roller or separation pad is worn.
Image problems
Problem
Cause
Solution
Images are missing or faded.
The print-cartridge might be defective.
Replace the print cartridge. See Print
cartridge on page 25.
The original might be of poor quality.
If your original is too light or damaged, the
copy might not be able to compensate, even
if you adjust the contrast. If possible, find an
original document in better condition.
The contrast settings might be set
incorrectly.
Use the control-panel Lighter/Darker button
to change the contrast setting.
The original might have a colored
background.
Colored backgrounds might cause images in
the foreground to blend into the background,
or the background might appear in a
different shade. If possible, use an original
document without a colored background.
The media might not meet
HP specifications.
Use media that meets HP specifications.
The print-cartridge might be defective.
Replace the print cartridge. See Print
cartridge on page 25.
Vertical white or faded stripes
appear on the copy.
ENWW
Copy problems 127
Problem
Cause
Solution
Unwanted lines or dots appear on
the copy.
The flatbed scanner might be dirty.
Clean the flatbed scanner. See Clean the
flatbed scanner glass on page 28.
The photosensitive drum inside the print
cartridge might have been scratched.
Install a new HP print cartridge. See Print
cartridge on page 25.
Ink, glue, correction fluid, or an unwanted
substance might be on the flatbed scanner.
Clean the flatbed scanner. See Clean the
flatbed scanner glass on page 28.
The power to the product might have
fluctuated.
Reprint the job.
The printer driver or product software
settings may be incorrect.
Verify that the quality settings are correct.
Black dots or streaks appear on
the copy.
Copies are too light or dark.
See the product software Help for more
information about changing the settings.
Text is unclear.
The printer driver or product software
settings may be incorrect.
Verify that the quality settings are correct.
Verify that the EconoMode setting is off.
See the product software Help for more
information about changing the settings.
Media-handling problems
Problem
Cause
Solution
Poor print quality or toner
adhesion
The paper is too moist, too rough, too heavy
or too smooth, or it is embossed or from a
faulty paper lot.
Try another kind of paper, between 100 and
250 Sheffield, 4 to 6% moisture content.
Dropouts, jamming, or curl
The paper has been stored incorrectly.
Store paper flat in its moisture-proof
wrapping.
The paper has variability from one side to the
other.
Turn the paper over.
The paper is too moist, has the wrong grain
direction, or is of short-grain construction
Use long-grain paper.
The paper varies from side-to-side.
Turn the paper over.
The paper has cutouts or perforations.
Use paper that is free of cutouts or
perforations.
Excessive curl
Jamming, damage to paper
128 Chapter 6 Problem solve
ENWW
Problem
Cause
Solution
Problems with feeding
The paper has ragged edges.
Use high-quality paper that is made for laser
printers.
The paper varies from side-to-side.
Turn the paper over.
The paper is too moist, too rough, too heavy
or too smooth, has the wrong grain direction,
or is of short-grain construction or it is
embossed or from a faulty paper lot.
Try another kind of paper, between 100 and
250 Sheffield, 4 to 6% moisture content.
Print is skewed (crooked).
The media guides might be incorrectly
adjusted.
Remove all media from the input tray,
straighten the stack, and then load the
media in the input tray again. Adjust the
media guides to the width and length of the
media that you are using and try printing
again.
More than one sheet feeds at one
time.
The media tray might be overloaded.
Remove some of the media from the tray.
See Install input devices on page 19.
The media might be wrinkled, folded, or
damaged.
Verify that the media is not wrinkled, folded,
or damaged. Try printing on media from a
new or different package.
The product does not pull media
from the media input tray.
ENWW
Use long-grain paper.
The product might be in manual feed mode. ●
If Manual appears on the product
control-panel display, press OK to print
the job.
●
Verify that the product is not in manual
feed mode and print your job again.
The pickup roller might be dirty or damaged.
Contact HP. See www.hp.com/support/
LJM1120 or the support flyer that came in
the product box.
The paper-length adjustment control in
tray 1 is set at a length that is greater than
the media size.
Adjust the paper-length adjustment control
to the correct length.
Copy problems 129
Performance problems
Problem
Cause
Solution
No copy came out.
The input tray might be empty.
Load media in the product. See Install input
devices on page 19 for more information.
The original might have been loaded
incorrectly.
On the flatbed scanner, place the original
document face-down with the upper-left
corner of the document at the corner of the
glass indicated by the icon on the scanner.
The sealing tape might not have been
removed from the print cartridge.
Remove the print cartridge from the product,
pull out the sealing tape, and reinstall the
print cartridge.
The original might have been loaded
incorrectly.
On the flatbed scanner, make sure that the
original document is placed face-down with
the upper-left corner of the document at the
corner of the glass indicated by the icon on
the scanner.
The media might not meet
HP specifications.
Use media that meets HP specifications.
The print cartridge might be defective.
Replace the print cartridge. See Print
cartridge on page 25.
The product settings might be set to reduce
the scanned image.
On the control panel, press Reduce/
Enlarge and verify that it is set to
Original=100%.
Copies are blank.
Copies are reduced in size.
130 Chapter 6 Problem solve
ENWW
Functional checks
Engine test page
1.
Turn the product power on and wait for the message Ready to appear on the control-panel display.
2.
Rapidly open and then close the print-cartridge door five times.
CAUTION: Do not forcibly close the door to prevent damaging the door latches.
TIP: Depress and hold down the print-cartridge door button to prevent the door latches from
engaging. Open the door far enough to activate the door open sensor, and then fully close the door
(rapidly, five times).
3.
An engine test page prints.
Drum rotation test
The photosensitive drum, located in the print cartridge, must rotate in order for the print process to work.
The photosensitive drum receives its drive from the main drive assembly.
NOTE: This test is especially important if refilled print cartridges have been used.
1.
Open the print-cartridge door.
2.
Remove the print cartridge.
3.
Mark the drive gear on the cartridge with a felt-tipped marker. Note the position of the mark.
4.
Install the print cartridge and close the print-cartridge door. The startup sequence should rotate the
drum enough to move the mark.
5.
Open the print-cartridge door and inspect the gear that was marked in step 3. Verify that the mark
moved.
If the mark did not move, inspect the main drive assembly to make sure that it is meshing with the print
cartridge gears. If the drive gears appear functional and the drum does not move, replace the print
cartridge.
ENWW
Functional checks 131
Half self-test functional check
The print process can be subdivided into the following stages:
●
Image formation stage (charges the drum and writes a latent image to the drum with the laser)
●
Development stage (forms a toner image on the drum)
●
Transfer stage (transfers the image to the media)
●
Cleaning stage (removes excess toner from the drum)
●
Fusing stage (applies heat and pressure to the media to make the image permanent)
Perform a half self-test check
The purpose of the half self-test check is to determine which process is malfunctioning.
1.
Print a configuration page.
2.
Open the print cartridge access door after the paper advances halfway through the product
(approximately five seconds after the motor begins rotating). The leading edge of the paper should
have advanced past the print cartridge.
3.
Remove the print cartridge.
4.
Open the print cartridge drum shield to view the drum surface. If a dark and distinct toner image is
present on the drum surface, assume that the first two functions of the electrophotographic process
are functioning (image formation and development). Problem solve the failure as a transfer or fusing
problem.
Perform other checks
If no image appears on the photosensitive drum, perform these checks:
1.
Make sure that you removed the entire length of the sealing tape from the print cartridge before
you installed the cartridge.
2.
Perform a drum-rotation functional check to ensure that the drum is rotating (see Drum rotation
test on page 131).
3.
Perform a high-voltage power-supply check. See Heating element check on page 133.
132 Chapter 6 Problem solve
ENWW
Heating element check
Media passes between the heating element and a soft pressure roller to fuse toner to the media.
1.
Unplug the product for at least ten minutes.
2.
Verify that the thermistor connector is seated into both the product chassis and the ECU.
3.
Remove the heating element connector from the ECU. To measure the continuity of the heating
element, measure the resistance between the two pins at the end of the cable.
NOTE: Normal resistance is 25 ohms +/- 10 ohms for the 110 V product and 80 ohms +/- 20 ohms
for the 220 V product.
If no resistance is measured, replace the fuser.
4.
Remove the thermistor connector, and then measure the resistance between J206 pins one and
two and between J206 pins three and four.
NOTE:
F).
5.
Normal resistance between both pairs of pins is 370K ohms +/- 50K ohms at 20° C (68°
If no resistance is measured, replace the fuser.
High-voltage contacts check
The high-voltage contacts in the product must have a good connection with the contacts on the print
cartridge to provide the necessary voltages for the electrophotographic processes.
Check the print-cartridge contacts
Remove the print cartridge and visually inspect the three connection points on the ends of the print
cartridge: drum ground (callout 1), charging (callout 2), and developing roller (callout 3). If they are dirty
or corroded, clean the connection. If they are damaged, replace the print cartridge.
NOTE: Use only isopropyl alcohol to clean the connections.
Figure 6-1 Print-cartridge high-voltage connection points (right side)
1
ENWW
Functional checks 133
Figure 6-2 Print-cartridge high-voltage connection points (left side)
2
3
Check the high-voltage connector assembly
Visually inspect the cartridge connection points inside the product to make sure that they are not dirty
or corroded. If the pins are dirty, clean them by using isopropyl alcohol only.
134 Chapter 6 Problem solve
ENWW
Service-mode functions
NVRAM initialization
An NVRAM initialization returns the device settings to the factory-set defaults.
1.
Turn off the product.
2.
Press and hold both the Start Copy button and the Cancel button, and then turn on the product.
3.
Wait until the message Permanent storage init. appears, and then release the buttons.
When the NVRAM initialization process finishes, the product control panel shows the Ready message.
Super NVRAM initialization
The super NVRAM initialization clears all settings affected by a regular NVRAM initialization, and also
clears the product language and country/region settings. Both settings must be reset after a super
NVRAM initialization.
1.
Turn off the product.
2.
Press and hold both the right arrow button and the Cancel button, and then turn on the product.
3.
Wait until the message Permanent storage init. appears, and then release the buttons.
When the process finishes, the product control panel shows the Ready message.
Secondary service menu
Use this menu to perform various tests and print out special reports.
Open the secondary service menu
ENWW
1.
Press the Setup button.
2.
Simultaneously press and then release both the left arrow button and the OK button.
3.
Press the OK button.
4.
Use the arrow buttons to select the desired secondary-service option, and then press the OK
button.
5.
Use the arrow buttons to select the desired submenu option, and then press OK .
6.
After making the necessary menu item choices, wait for the product to enter the Ready state, and
then press Cancel to close the secondary service menu.
Menu item
Submenu
Description
Service Reports
Cont. Self-Test
The continuous self-test prints the configuration page
repeatedly until you press Cancel.
Cont. Copy
Run a continuous copy test to test the copy function.
Extended Keymap
Print the extended keypad map to see all the characters
associated with the alphanumeric keys.
Error Report
Print the error report to see firmware errors.
Service-mode functions 135
Menu item
Submenu
Description
Display test
Use the Display test sub-menu to run a test of the control-panel
display lights and LCD screen.
Button test
Use the Button test sub-menu to run a test of the control-panel
buttons.
Show FW Version
Use the Show FW Version sub-menu to display the firmware
version number.
High Speed USB
On (default)
Use the High Speed USB to enable or disable the high-speed
function of the USB port.
Off
TIP: If the product has difficulty communicating with a network
when using the USB port, change this setting to Off.
Scan Calibration
Mono
Use the Scan Calibration sub-menu to calibrate the product
scanner.
Red
Green
Blue
136 Chapter 6 Problem solve
ENWW
Problem-solving tools
Product information pages and reports
Information pages and reports reside within the product memory. These pages and reports help
diagnose and solve problems with the product.
NOTE: If the product language was not correctly set during installation, you can set the language
manually so the information pages print in one of the supported languages. Change the language by
using the System setup menu on the control panel or by using the embedded Web server.
Configuration page
The configuration page shows the current settings and product properties.
1.
On the product control panel, press Setup.
2.
Use the arrow buttons to select Reports, and then press OK.
3.
Use the arrow buttons to select Config report, and then press OK.
Demo page
The demo page contains examples of text and graphics.
1.
On the product control panel, press Setup.
2.
Use the arrow buttons to select Reports, and then press OK.
3.
Use the arrow buttons to select Demo page, and then press OK.
Menu map
The menu map shows the control-panel menus and available settings.
ENWW
1.
On the product control panel, press Setup.
2.
Use the arrow buttons to select Reports, and then press OK.
3.
Use the arrow buttons to select Menu structure, and then press OK.
Problem-solving tools 137
Service menu
Use the control-panel Service menu to solve product problems. In the table below, an asterisk (*)
denotes the default setting.
Service menu item
Submenu option
Description
Restore defaults
None
Press OK to restore the product factory
settings.
Cleaning mode
None
Press OK to start the cleaning process.
See Clean the paper path on page 29 for
more information.
Archive print
Off*
On
The archive print feature produces
output that is less susceptible to toner
smearing and dusting. Use archive print
to create documents that you want to
preserve or archive.
Off*
Lowers the fuser temperature.
Less paper curl
On
Restore the factory-set defaults
Restoring the factory-set defaults returns all of the settings to the factory defaults.
1.
On the product control panel, press Setup.
2.
Use the arrow buttons to select Service, and then press OK.
3.
Use the arrow buttons to select Restore defaults, and then press OK.
The product automatically restarts.
Clean the paper path
The product features a special cleaning mode to clean the paper path.
1.
On the product control panel, press Setup.
2.
Use the arrow buttons to select Service, and then press OK.
3.
Use the arrow buttons to select Cleaning Mode, and then press OK.
A page feeds through the product slowly. Discard the page when the process is completed.
4.
Load plain letter or A4 paper when you are prompted.
5.
Press OK again to confirm and begin the cleaning process.
A page feeds through the product slowly. Discard the page when the process is completed.
Archive print
Archive print produces output that is less susceptible to toner smearing and dusting. Use archive print
to create documents that you want to preserve or archive.
138 Chapter 6 Problem solve
ENWW
Turn on archive print
ENWW
1.
On the product control panel, press Setup.
2.
Use the arrow buttons to select Service, and then press OK.
3.
Use the arrow buttons to select Archive print, On, or Off, and then press OK.
Problem-solving tools 139
Problem-solving diagrams
●
Repetitive image defects
●
Interface ports
●
Formatter connectors
●
ECU connectors
●
Solenoid and motor
●
Rollers
●
Sensors
●
Major components
●
PCAs (base unit)
●
Circuit diagram
Repetitive image defects
If the product output has a consistent, repetitive defect, then use Table 6-1 Repetitive image defects
on page 140 to determine which part needs to be replaced based on the measured distance between
the repetitions of the defect.
NOTE: The following table replaces the graphical repetitive defect ruler. You can make your own ruler
by using these measurements.
Table 6-1 Repetitive image defects
Distance between identical
defects
Dirty or damaged roller
Solution
26.7 mm (1.05 in)
Primary charging roller
Replace the print cartridge.
29.1 mm (1.14 in)
Developing cylinder
Replace the print cartridge.
39.3 mm (1.55 in)
Transfer roller
Replace the transfer roller.
56.2 mm (2.21 in)
Pressure roller
Replace the fuser.
56.5 mm (2.22 in)
Fuser film (fuser sleeve)
Replace the fuser.
140 Chapter 6 Problem solve
ENWW
Interface ports
All models have a Hi-Speed USB 2.0 port. The HP LaserJet M1120n also has a 10/100 Base-T (RJ-45)
network port.
1
2
ENWW
1
Hi-Speed USB 2.0 port
2
Network port (HP LaserJet M1120n only)
Problem-solving diagrams 141
Formatter connectors
Figure 6-3 Formatter connectors
J12
J10
J17
J8
J18
J14
Table 6-2 Formatter connectors
Item
Description
J8
High-speed USB 2.0 port
J10
Control panel
J12
Scanner
J14
+24V (from engine)
J17
ECU PCA
J18
Network port
142 Chapter 6 Problem solve
ENWW
ECU connectors
Figure 6-4 ECU connectors
Table 6-3 ECU connectors
ENWW
Item
Description
J101
Fuser (not shown)
J102
Power switch
J501
Interlock
J531
Formatter PCA (communication, +5v, +3.3v, GND)
J532
Formatter PCA (communication, +24v, GND)
J542
Laser/scanner
J551
Top-of-media sensor (PS751)
J552
Media-sensor PCA (fuser delivery sensor PS701 and media width sensor PS702)
J562
Pickup solenoid
J571
Motor-drive PCA
J581
TAGIN/TAGOUT PCA
Problem-solving diagrams 143
Solenoid and motor
Figure 6-5 Solenoid and motor
1
2
Table 6-4 Solenoid and motor
Item
Description
1
Pickup solenoid
2
Main motor
144 Chapter 6 Problem solve
ENWW
Rollers
Figure 6-6 Rollers
1
2
Table 6-5 Rollers
ENWW
Item
Description
1
Transfer roller (fastened to the rear door)
2
Pickup roller
Problem-solving diagrams 145
Sensors
Figure 6-7 Sensors
PS702
PS701
PS751
Table 6-6 Sensors
Item
Description
PS701
Fuser-delivery sensor
PS702
Media-width sensor
PS751
Top-of-page sensor
146 Chapter 6 Problem solve
ENWW
Major components
Figure 6-8 Major components
1
2
4
31
Table 6-7 Major components
ENWW
Item
Description
1
Fuser assembly
2
Laser/scanner assembly
3
Paper-pickup assembly
4
Separation-pad assembly
Problem-solving diagrams 147
PCAs (base unit)
Figure 6-9 PCAs (base unit)
1
2
Table 6-8 PCAs (base unit)
Item
Description
1
Formatter PCA
2
Engine-controller PCA (ECU)
148 Chapter 6 Problem solve
ENWW
1
2
TH1
2
FSRTH
GND
3
/BDIR
+3.3R
/PISNS
+3.3R
GND
J551
+24P1
SL
J562
CNT2
/POSNS
Engine Controller PCA
CNT0
CNT1
GND(V)
/PWSNS
/VDO1
GND(V)
VDO2
/VDO2
GND(V)
GND
2
J801
TAGIN
BD
sensor
J3
J903
TAGOUT
Laser Drive PCA
1
2
3
4
5
6
7
8
9
10
11
J901
2
1
1
J542
+5V
GND
VDO1
1
SW101
Power switch
2
SW501
1
FSRTH
J552
3
Top of page sensor PCA
2
Fuser unit
1
2
3
4
5
J701
AC N
AC H
J101
2
1
J751
SL1
1
Interlock switch
MFG
/MTRPWM
DEC
ACC
+5R
+24P2
+24P2
+24P2
GND
GND
GND
J571
2
1
12
1
PS751
Top of page sensor
Pickup solenoid
3
1
2
PS702
3
1
2
PS701
J532
+3.3R
+3.3R
+3.3R
GND
GND
GND
+5V_R
SCLK
SC
/RSTO
/BDO
GND
/VDO1
TAGOUT
VDO1
J581
TAGIN
GND
VDO2
+24FMTR
Thermal fuse
TP1
Media width
sensor
J1011
2
J531
GND
Fuser sleeve unit
Fuser delivery
sensor
H1
Media sensor PCA
J702
Thermistor
Formatter
3
2
1
Fuser heater
1
2
/VDO2
11
2
10
1
9
2
8
1
5
4
7
3
6
2
1
2
5
1
1
4
SL
2
2
3
2
1
1
3
5
7
4
6
8
10
12
9
11
13
15
17
14
16
18
1
2
1
2
3
2
1
J1
2
3
M
4
Scanner motor
1
M2
Motor Drive PCA
1
PS901
Main motor rotational
count sensor
J902
2
1
M
M1
Main motor
Laser/ Scanner unit
+24P2 1
3
18
2
17
1
16
2
15
3
14
4
13
1
5
12
11
6
11
10
7
10
9
8
9
8
9
8
7
10
7
6
11
6
5
12
5
4
13
4
2
3
3
4
2
2
3
1
2
MTRPWM
2
1
1
+24P2
1
ENWW
GND
Circuit diagram
Figure 6-10 Circuit diagram
ACC 2
DEC 3
GND 4
13
Problem-solving diagrams 149
Firmware updates
Firmware updates and installation instructions for this product are available at www.hp.com/support/
LJM1120. Click Downloads and drivers, click the operating system, and then select the firmware
download for the product.
150 Chapter 6 Problem solve
ENWW
7
ENWW
Parts
●
Ordering information
●
Supplies and hinge tool
●
Cable and interface accessories
●
Whole-unit replacement
●
Control-panel overlays
●
Supplementry documentation and support
●
Parts lists and diagrams
●
Scanner assemblies
●
Assemblies
●
External covers and panels
●
Internal components (1 of 3)
●
Internal components (2 of 3)
●
Internal components (3 of 3)
●
Alphabetical parts list
●
Numerical parts list
151
Ordering information
Order replacement parts, supplies, and paper from the following Web sites:
●
To order genuine HP parts and accessories, go to www.hp.com/buy/parts.com.
●
To order supplies and paper, go to www.hp.com/buy/suresupply.com.
Supplies and hinge tool
Product name
Description
Part number
Replacement print cartridge
Average yield for the print cartridge is
approximately 2,000 pages. Actual yield
depends on use.
CB436A (new)
Use this tool to secure the scanner in the
open position when the link assemblies
are disengaged.
5185-7441
Scanner hinge tool
CB436-67901 (exchange)
Cable and interface accessories
Product name
Description
Part number
USB cable
2-meter standard USB-compatible
device connector
C6518A
3-meter standard USB-compatible
device connector
C6520A
U.S. / Canada (1.8 M, 6 ft)
8120-8382
Europe (1.8 M, 6 ft)
8121-0516
Switzerland (1.8 M, 6 ft)
8121-0519
United Kingdom (1.8 M, 6 ft)
8121-0517
Denmark (1.8 M, 6 ft)
8121-0518
South America (1.8 M, 6 ft)
8121-0520
Israel (1.8 M, 6 ft)
8121-1004
Power cord
152 Chapter 7 Parts
ENWW
Whole-unit replacement
Use the tables in this section to find the whole-unit replacement part number for a specific product bundle
and localized configuration.
Table 7-1 Whole-unit replacement, product bundle CC537A
ENWW
Country/region
Localized configuration
Replacement part number
Asia Pacific
AB0 - Taiwan-Traditional Chinese
CC537-67902
AB1 - Korea-Korean localization
CC537-67903
AB2 - China-Simplified Chinese
CC537-67904
AB3 - Thailand-Thai
CC537-67905
AB4 - Singapore-English
CC537-67906
BFV - Hong Kong SAR-English/Traditional Chinese
CC537-67907
ABG - Australia-English
CC537-67909
A2K - Philippines-English
CC537-67910
ACJ - India-English
CC537-67911
AK3 - Indonesia-Indonesia localizaton
CC537-67912
UUD - Vietnam-Vietnamese localization
CC537-67913
ARR - Asia Pacific (Euro Cord)-English
CC537-67914
ARS - Asia Pacific (UK Cord)-English
CC537-67915
Whole-unit replacement 153
Table 7-1 Whole-unit replacement, product bundle CC537A (continued)
Country/region
Localized configuration
Replacement part number
Europe, Middle East, and Africa
ABD - Germany-German
CC537-67916
ABF - France-French
CC537-67917
ABH - Netherlands-Dutch
CC537-67918
ABZ - Italy-Italian
CC537-67919
ABE - Spain-Spanish localization
CC537-67920
BFY - Spain-Catalan localization
CC537-67921
ABU - United Kingdom-English
CC537-67922
B14 - Belgium-Dutch/French
CC537-67923
AR8 - Switzerland-French/German
CC537-67924
BB1 - Norway/Finland/Sweden-NO/FI/SV
localization
CC537-67925
ABY - Denmark-Danish
CC537-67926
ACB - Russia-Cyrillic
CC537-67927
BCM - Czech Rep/Slovakia-Czech/Slovak
localization
CC537-67928
AKC - Hungary-Hungarian localization
CC537-67929
AKD - Poland-Polish localization
CC537-67930
AB9 - Portugal-Portuguese localization
CC537-67931
ACQ - South Africa-English
CC537-67932
BCP - Greece/Israel-Greek/Hebrew localization
CC537-67933
BFQ - Mid East 220V-AR/FR/EN localization
CC537-67934
BFR - Estonia/Lithuania/Latvia-ET/LT/LV
CC537-67935
BFS - Slovenia/Croatia/Serbia-SL/HR/SR
CC537-67936
BFZ - Kazakhstan/Ukraine-Kazakh/Ukrainian
locization
CC537-67937
AB8 - Turkey-Turkish localization
CC537-67938
BG1 - Romania/Bulgaria-Romanian/Bulgarian
locization
CC537-67939
AC8 - Argentina-Spanish
CC537-67940
ABM - Latin Amer-(120v) Spanish localization
CC537-67941
696 - Brazil-Portuguese
CC537-67942
697 - Latin America-Spanish localization
CC537-67943
AKV - South America-Spanish
CC537-67944
ABA - U. S.-English
CC537-67945
Latin America
North America
154 Chapter 7 Parts
ENWW
Table 7-2 Whole-unit replacement, product bundle CC459A
ENWW
Country/region
Localized configuration
Replacement part number
Asia Pacific
AB0 - Taiwan-Traditional Chinese
CC459-67901
AB1 - Korea-Korean localization
CC459-67902
AB2 - China-Simplified Chinese
CC459-67903
AB3 - Thailand-Thai
CC459-67904
AB4 - Singapore-English
CC459-67905
BFV - Hong Kong SAR-English/Traditional Chinese
CC459-67906
ABG - Australia-English
CC459-67907
A2K - Philippines-English
CC459-67908
ACJ - India-English
CC459-67909
AK3 - Indonesia-Indonesia localizaton
CC459-67910
UUD - Vietnam-Vietnamese localization
CC459-67911
ARR - Asia Pacific (Euro Cord)-English
CC459-67912
ARS - Asia Pacific (UK Cord)-English
CC459-67913
Whole-unit replacement 155
Table 7-2 Whole-unit replacement, product bundle CC459A (continued)
Country/region
Localized configuration
Replacement part number
Europe, Middle East, and Africa
ABD - Germany-German
CC459-67914
ABF - France-French
CC459-67915
ABH - Netherlands-Dutch
CC459-67916
ABZ - Italy-Italian
CC459-67917
ABE - Spain-Spanish localization
CC459-67918
BFY - Spain-Catalan localization
CC459-67919
ABU - United Kingdom-English
CC459-67920
B14 - Belgium-Dutch/French
CC459-67921
AR8 - Switzerland-French/German
CC459-67922
BB1 - Norway/Finland/Sweden-NO/FI/SV
localization
CC459-67923
ABY - Denmark-Danish
CC459-67924
ACB - Russia-Cyrillic
CC459-67925
BCM - Czech Rep/Slovakia-Czech/Slovak
localization
CC459-67926
AKC - Hungary-Hungarian localization
CC459-67927
AKD - Poland-Polish localization
CC459-67928
AB9 - Portugal-Portuguese localization
CC459-67929
ACQ - South Africa-English
CC459-67930
BCP - Greece/Israel-Greek/Hebrew localization
CC459-67931
BFQ - Mid East 220V-AR/FR/EN localization
CC459-67932
BFR - Estonia/Lithuania/Latvia-ET/LT/LV
CC459-67933
BFS - Slovenia/Croatia/Serbia-SL/HR/SR
CC459-67934
BFZ - Kazakhstan/Ukraine-Kazakh/Ukrainian
localization
CC459-67935
AB8 - Turkey-Turkish localization
CC459-67936
BG1 - Romania/Bulgaria-Romanian/Bulgarian
localization
CC459-67937
AC8 - Argentina-Spanish
CC459-67938
ABM - Latin Amer-(120v) Spanish localization
CC459-67939
696 - Brazil-Portuguese
CC459-67940
697 - Latin America-Spanish localization
CC459-67941
AKV - South America-Spanish
CC459-67942
ABA - U. S.-English
CC459-67943
Latin America
North America
156 Chapter 7 Parts
ENWW
Control-panel overlays
Table 7-3 Control-panel overlays, HP LaserJet M1120
ENWW
Item
Language
Part number
Control-panel overlay
English (EN)
CB537-00003
Control-panel overlay
Spanish (ES)
CB537-00004
Control-panel overlay
Portuguese (PT)
CB537-00005
Control-panel overlay
German (DE)
CB537-00006
Control-panel overlay
French (FR)
CB537-00007
Control-panel overlay
Dutch (NL)
CB537-00008
Control-panel overlay
Italian (IT)
CB537-00009
Control-panel overlay
Swedish (SV)
CB537-00010
Control-panel overlay
Norwegian (NO)
CB537-00011
Control-panel overlay
Finnish (FI)
CB537-00012
Control-panel overlay
Danish (DA)
CB537-00013
Control-panel overlay
Russian (RU)
CB537-00014
Control-panel overlay
Czech (CS)
CB537-00015
Control-panel overlay
Hungarian (HU)
CB537-00016
Control-panel overlay
Polish (PL)
CB537-00017
Control-panel overlay
Slovak (SK)
CB537-00018
Control-panel overlay
Turkish (TR)
CB537-00019
Control-panel overlay
Greek (EL)
CB537-00020
Control-panel overlay
Hebrew (HE)
CB537-00021
Control-panel overlay
Arabic (AR)
CB537-00022
Control-panel overlay
Traditional Chinese (ZHTW)
CB537-00023
Control-panel overlay
Korean (KO)
CB537-00024
Control-panel overlay
Simplified Chinese (ZHCN)
CB537-00025
Control-panel overlay
Thai (TH)
CB537-00026
Control-panel overlay
Vietnamese (VI)
CB537-00027
Control-panel overlay
Catalan (CA)
CB537-00029
Control-panel overlay
Romanian (RO)
CB537-00030
Control-panel overlay
Croation (HR)
CB537-00031
Control-panel overlay
Slovenian (SL)
CB537-00032
Control-panel overlay
Indonesian (ID)
CB537-00033
Control-panel overlay
Kazakh (KK)
CB537-00034
Control-panel overlay
Bulgarian (BG)
CB537-00035
Control-panel overlays 157
Table 7-3 Control-panel overlays, HP LaserJet M1120 (continued)
Item
Language
Part number
Control-panel overlay
Ukranian (UK)
CB537-00036
Control-panel overlay
Serbian (SR)
CB537-00037
Control-panel overlay
Lithuanian (LT)
CB537-00038
Control-panel overlay
Estonian (ET)
CB537-00039
Control-panel overlay
Latvian (LV)
CB537-00040
Table 7-4 Control-panel overlays, HP LaserJet M1120n
Item
Language
Part number
Control-panel overlay
English (EN)
CC459-00003
Control-panel overlay
Spanish (ES)
CC459-00004
Control-panel overlay
Portuguese (PT)
CC459-00005
Control-panel overlay
German (DE)
CC459-00006
Control-panel overlay
French (FR)
CC459-00007
Control-panel overlay
Dutch (NL)
CC459-00008
Control-panel overlay
Italian (IT)
CC459-00009
Control-panel overlay
Swedish (SV)
CC459-00010
Control-panel overlay
Norwegian (NO)
CC459-00011
Control-panel overlay
Finnish (FI)
CC459-00012
Control-panel overlay
Danish (DA)
CC459-00013
Control-panel overlay
Russian (RU)
CC459-00014
Control-panel overlay
Czech (CS)
CC459-00015
Control-panel overlay
Hungarian (HU)
CC459-00016
Control-panel overlay
Polish (PL)
CC459-00017
Control-panel overlay
Slovak (SK)
CC459-00018
Control-panel overlay
Turkish (TR)
CC459-00019
Control-panel overlay
Greek (EL)
CC459-00020
Control-panel overlay
Hebrew (HE)
CC459-00021
Control-panel overlay
Arabic (AR)
CC459-00022
Control-panel overlay
Traditional Chinese (ZHTW)
CC459-00023
Control-panel overlay
Korean (KO)
CC459-00024
Control-panel overlay
Simplified Chinese (ZHCN)
CC459-00025
Control-panel overlay
Thai (TH)
CC459-00026
Control-panel overlay
Vietnamese (VI)
CC459-00027
Control-panel overlay
Catalan (CA)
CC459-00028
158 Chapter 7 Parts
ENWW
Table 7-4 Control-panel overlays, HP LaserJet M1120n (continued)
ENWW
Item
Language
Part number
Control-panel overlay
Romanian (RO)
CC459-00029
Control-panel overlay
Croation (HR)
CC459-00030
Control-panel overlay
Slovenian (SL)
CC459-00031
Control-panel overlay
Indonesian (ID)
CC459-00032
Control-panel overlay
Kazakh (KK)
CC459-00033
Control-panel overlay
Bulgarian (BG)
CC459-00034
Control-panel overlay
Ukranian (UK)
CC459-00035
Control-panel overlay
Serbian (SR)
CC459-00036
Control-panel overlay
Lithuanian (LT)
CC459-00037
Control-panel overlay
Estonian (ET)
CC459-00038
Control-panel overlay
Latvian (LV)
CC459-00030
Control-panel overlays 159
Supplementry documentation and support
Table 7-5 Documentation (print on demand)
Description
Languages
Part number
Service manual (this manual)
English only
CB537-90945
Getting Started guides
English, Spanish, Portuguese, French
CB537-90901
English, Spanish, Portuguese, Catalan, Dutch, French, German,
Italian
CB537-90902
English, Danish, Finnish, French, Norwegian, Swedish, Arabic
CB537-90903
English, Bulgarian, Czech, Hungarian, Polish, Romanian, Russian,
Slovak
CB537-90904
English, Kazakh, Turkish, Ukrainian, Estonian, Latvian, Lithuanian
CB537-90905
English, Croation, Greek, Serbian, Slovenian, Hebrew
CB537-90906
English, Korean, Indonesian, Chinese simplified, Chinese
traditional, Thai, Vietnamese
CB537-90907
English
CB537-90908
Arabic
CB537-90943
Bulgarian
CB537-90914
Chinese simplified
CB537-90915
Chinese traditional
CB537-90939
Croatian
CB537-90916
Czech
CB537-90917
User guides
160 Chapter 7 Parts
ENWW
Table 7-5 Documentation (print on demand) (continued)
ENWW
Description
Languages
Part number
User guides, continued
Danish
CB537-90918
Dutch
CB537-90919
Estonian
CB537-90920
Finnish
CB537-90921
French
CB537-90909
German
CB537-90910
Greek
CB537-90922
Hebrew
CB537-90944
Hungarian
CB537-90923
Indonesian
CB537-90924
Italian
CB537-90911
Kazakh
CB537-90925
Korean
CB537-90926
Latvian
CB537-90927
Lithuanian
CB537-90928
Norwegian
CB537-90929
Polish
CB537-90930
Portuguese
CB537-90931
Romanian
CB537-90932
Russian
CB537-90933
Serbian
CB537-90934
Slovak
CB537-90935
Slovenian
CB537-90936
Spanish, Catalan
CB537-90913
Spanish, mid-Atlantic
CB537-90912
Swedish
CB537-90937
Thai
CB537-90938
Turkish
CB537-90940
Ukrainian
CB537-90941
Vietnamese
CB537-90942
Supplementry documentation and support 161
Parts lists and diagrams
How to use the parts lists and diagrams
The figures in this chapter show the major subassemblies in the product and their component parts. A
parts list table follows each exploded-view assembly diagram. Each table lists the item number, the
associated part number, and the description of each part. If a part is not listed in the table, then it is not
a field replaceable unit (FRU).
CAUTION: Be sure to order the correct part. When looking for part numbers for electrical components,
pay careful attention to the voltage that is listed in the description column to ensure that the part number
selected is for the correct product model.
NOTE: In this manual, the abbreviation “PCA” stands for “printed circuit board assembly.” Components
described as a PCA might consist of a single circuit board or a circuit board plus other parts, such as
cables and sensors.
162 Chapter 7 Parts
ENWW
Types of screws
Illustration
Description
Size
Part number
Use
Screw, RS
M3X6
XB2-8300-609CN
Used to secure plastic to
metal
M3X8
XA9-1504-000CN
M3X10
XA9-1501-000CN
Screw, D
M3X6
XA9-1670-000CN
Used to secure plastic to
metal
Screw w/washer
M3X6
XB2-7300-605CN
M3X8
XA9-1420-000CN
Used to secure metal
components to metal
components
M4X10
XB4-5401-009CN
M3X9
0515-4671
Screw tapping
Used to secure anything
to plastic
Control panel to scanner
12 mm
ENWW
Parts lists and diagrams 163
Scanner assemblies
Figure 7-1 Scanner assemblies
1
2
4
3
164 Chapter 7 Parts
ENWW
Table 7-6 Scanner assemblies
ENWW
Ref
Description
Part number
Qty
1
Flatbed lid
CB537-60102
1
2
Control-panel assembly, LJm1120 (Western)
CB537-60109
1
2
Control-panel assembly, LJm1120 (Asian)
CB537-60110
1
3
SSA PKG FGI ASSY LJm1120 (scanner flatbed assembly)
CB537-67901
1
4
LJm1005 HP Jewel
7121-8285
1
Scanner assemblies 165
Assemblies
Figure 7-2 Assemblies
1
2
3
4
5
7
166 Chapter 7 Parts
6
ENWW
Table 7-7 Assemblies
ENWW
Ref
Description
Part number
Qty
1
Control-panel overlay
See Control-panel overlays
on page 157.
1
2
Scanner spring, tension
RU6-2637-000CN
1
3
Scanner-link assembly, right
RM1-3954-000CN
1
4
Scanner-link assembly, left
RM1-3953-000CN
1
5
Paper-delivery tray assembly
RM1-4725-000CN
1
6
Paper-pickup tray assembly
RM1-4722-000CN
1
7
Formatter, standard (HP LaserJet M1120)
CC390-60001
1
7
Formatter, Asian (HP LaserJet M1120)
CC539-60001
1
7
Formatter, standard (HP LaserJet M1120n)
CC427-60001
1
7
Formatter, Asian (HP LaserJet M1120n)
CC540-60001
1
Assemblies 167
External covers and panels
Figure 7-3 External covers and panels
1
2
4
7
3
5
6
168 Chapter 7 Parts
ENWW
Table 7-8 External covers and panels
ENWW
Ref
Description
Part number
Qty
1
Cover, rear
RC2-2971-000CN
1
2
Cover, cartridge
RC2-2960-000CN
1
3
Cushion, scanner
RC1-2476-000CN
2
4
Cover, right
RL1-1736-000CN
1
5
Cover, front
RL1-1734-000CN
1
6
Cover, left
RL1-1735-000CN
1
7
Cover, top
RL1-1732-000CN
1
External covers and panels 169
Internal components (1 of 3)
Figure 7-4 Internal components (1 of 3)
1
3
2
170 Chapter 7 Parts
ENWW
Table 7-9 Internal components (1 of 3)
ENWW
Ref
Description
Part number
Qty
1
Fuser assembly, 110v-220v
RM1-4721-000CN
1
1
Fuser assembly, 220v-240v
RM1-4726-000CN
1
2
Engine controller PCA (ECU), 110v-220v
RM1-4932-000CN
1
2
Engine controller PCA (ECU), 220v-240v
RM1-4936-000CN
1
3
Link, coupling
RC2-2965-000CN
1
Internal components (1 of 3) 171
Internal components (2 of 3)
Figure 7-5 Internal components (2 of 3)
3
2
6
1
5
4
172 Chapter 7 Parts
ENWW
Table 7-10 Internal components (2 of 3)
ENWW
Ref
Description
Part number
Qty
1
Paper-pickup assembly
RM1-4727-000CN
1
2
Roller, transfer
RM1-4234-000CN
1
3
Roller, pickup
RL1-1497-000CN
1
4
Separation-pad assembly
RM1-4207-000CN
1
5
Latch, left
RC1-2498-000CN
1
6
Latch, right
RC1-2499-000CN
1
Internal components (2 of 3) 173
Internal components (3 of 3)
Figure 7-6 Internal components (3 of 3)
2
1
4
5
3
174 Chapter 7 Parts
ENWW
Table 7-11 Internal components (3 of 3)
ENWW
Ref
Description
Part number
Qty
1
Laser/scanner assembly
RM1-4724-005CN
1
2
Motor-controller PCA
RM1-4935-000CN
1
3
Tray guide, left
RC2-2979-000CN
1
4
Tray guide, right
RC2-2980-000CN
1
5
Motor, 24V DC
RM1-4196-000CN
1
Internal components (3 of 3) 175
Alphabetical parts list
Table 7-12 Alphabetical parts list
Description
Part number
Table and page
Control-panel assembly, LJm1120 (Asian)
CB537-60110
Scanner assemblies
on page 165
Control-panel assembly, LJm1120 (Western)
CB537-60109
Scanner assemblies
on page 165
Control-panel overlay
See Control-panel
overlays on page 157.
Assemblies on page 167
Cover, cartridge
RC2-2960-000CN
External covers and panels
on page 169
Cover, front
RL1-1734-000CN
External covers and panels
on page 169
Cover, left
RL1-1735-000CN
External covers and panels
on page 169
Cover, rear
RC2-2971-000CN
External covers and panels
on page 169
Cover, right
RL1-1736-000CN
External covers and panels
on page 169
Cover, top
RL1-1732-000CN
External covers and panels
on page 169
Cushion, scanner
RC1-2476-000CN
External covers and panels
on page 169
Engine controller PCA (ECU), 110v-220v
RM1-4932-000CN
Internal components (1 of 3)
on page 171
Engine controller PCA (ECU), 220v-240v
RM1-4936-000CN
Internal components (1 of 3)
on page 171
Flatbed lid
CB537-60102
Scanner assemblies
on page 165
Formatter, Asian (HP LaserJet M1120)
CC539-60001
Assemblies on page 167
Formatter, Asian (HP LaserJet M1120n)
CC540-60001
Assemblies on page 167
Formatter, standard (HP LaserJet M1120)
CC390-60001
Assemblies on page 167
Formatter, standard (HP LaserJet M1120n)
CC427-60001
Assemblies on page 167
Fuser assembly, 110v-220v
RM1-4721-000CN
Internal components (1 of 3)
on page 171
Fuser assembly, 220v-240v
RM1-4726-000CN
Internal components (1 of 3)
on page 171
Laser/scanner assembly
RM1-4724-005CN
Internal components (3 of 3)
on page 175
Latch, left
RC1-2498-000CN
Internal components (2 of 3)
on page 173
Latch, right
RC1-2499-000CN
Internal components (2 of 3)
on page 173
176 Chapter 7 Parts
ENWW
Table 7-12 Alphabetical parts list (continued)
ENWW
Description
Part number
Table and page
Link, coupling
RC2-2965-000CN
Internal components (1 of 3)
on page 171
LJm1005 HP Jewel
7121-8285
Scanner assemblies
on page 165
Motor, 24V DC
RM1-4196-000CN
Internal components (3 of 3)
on page 175
Motor-controller PCA
RM1-4935-000CN
Internal components (3 of 3)
on page 175
Paper-delivery tray assembly
RM1-4725-000CN
Assemblies on page 167
Paper-pickup assembly
RM1-4727-000CN
Internal components (2 of 3)
on page 173
Paper-pickup tray assembly
RM1-4722-000CN
Assemblies on page 167
Roller, pickup
RL1-1497-000CN
Internal components (2 of 3)
on page 173
Roller, transfer
RM1-4234-000CN
Internal components (2 of 3)
on page 173
Scanner spring, tension
RU6-2637-000CN
Assemblies on page 167
Scanner-link assembly, left
RM1-3953-000CN
Assemblies on page 167
Scanner-link assembly, right
RM1-3954-000CN
Assemblies on page 167
Separation-pad assembly
RM1-4207-000CN
Internal components (2 of 3)
on page 173
SSA PKG FGI ASSY LJm1120 (scanner flatbed assembly)
CB537-67901
Scanner assemblies
on page 165
Tray guide, left
RC2-2979-000CN
Internal components (3 of 3)
on page 175
Tray guide, right
RC2-2980-000CN
Internal components (3 of 3)
on page 175
Alphabetical parts list 177
Numerical parts list
Table 7-13 Numerical parts list
Part number
Description
Table and page
7121-8285
LJm1005 HP Jewel
Scanner assemblies
on page 165
CB537-60102
Flatbed lid
Scanner assemblies
on page 165
CB537-60109
Control-panel assembly, LJm1120 (Western)
Scanner assemblies
on page 165
CB537-60110
Control-panel assembly, LJm1120 (Asian)
Scanner assemblies
on page 165
CB537-67901
SSA PKG FGI ASSY LJm1120 (scanner flatbed assembly)
Scanner assemblies
on page 165
CC390-60001
Formatter, standard (HP LaserJet M1120)
Assemblies on page 167
CC427-60001
Formatter, standard (HP LaserJet M1120n)
Assemblies on page 167
CC539-60001
Formatter, Asian (HP LaserJet M1120)
Assemblies on page 167
CC540-60001
Formatter, Asian (HP LaserJet M1120n)
Assemblies on page 167
RC1-2476-000CN
Cushion, scanner
External covers and panels
on page 169
RC1-2498-000CN
Latch, left
Internal components (2 of 3)
on page 173
RC1-2499-000CN
Latch, right
Internal components (2 of 3)
on page 173
RC2-2960-000CN
Cover, cartridge
External covers and panels
on page 169
RC2-2965-000CN
Link, coupling
Internal components (1 of 3)
on page 171
RC2-2971-000CN
Cover, rear
External covers and panels
on page 169
RC2-2979-000CN
Tray guide, left
Internal components (3 of 3)
on page 175
RC2-2980-000CN
Tray guide, right
Internal components (3 of 3)
on page 175
RL1-1497-000CN
Roller, pickup
Internal components (2 of 3)
on page 173
RL1-1732-000CN
Cover, top
External covers and panels
on page 169
RL1-1734-000CN
Cover, front
External covers and panels
on page 169
RL1-1735-000CN
Cover, left
External covers and panels
on page 169
RL1-1736-000CN
Cover, right
External covers and panels
on page 169
178 Chapter 7 Parts
ENWW
Table 7-13 Numerical parts list (continued)
ENWW
Part number
Description
Table and page
RM1-3953-000CN
Scanner-link assembly, left
Assemblies on page 167
RM1-3954-000CN
Scanner-link assembly, right
Assemblies on page 167
RM1-4196-000CN
Motor, 24V DC
Internal components (3 of 3)
on page 175
RM1-4207-000CN
Separation-pad assembly
Internal components (2 of 3)
on page 173
RM1-4234-000CN
Roller, transfer
Internal components (2 of 3)
on page 173
RM1-4721-000CN
Fuser assembly, 110v-220v
Internal components (1 of 3)
on page 171
RM1-4722-000CN
Paper-pickup tray assembly
Assemblies on page 167
RM1-4724-005CN
Laser/scanner assembly
Internal components (3 of 3)
on page 175
RM1-4725-000CN
Paper-delivery tray assembly
Assemblies on page 167
RM1-4726-000CN
Fuser assembly, 220v-240v
Internal components (1 of 3)
on page 171
RM1-4727-000CN
Paper-pickup assembly
Internal components (2 of 3)
on page 173
RM1-4932-000CN
Engine controller PCA (ECU), 110v-220v
Internal components (1 of 3)
on page 171
RM1-4935-000CN
Motor-controller PCA
Internal components (3 of 3)
on page 175
RM1-4936-000CN
Engine controller PCA (ECU), 220v-240v
Internal components (1 of 3)
on page 171
RU6-2637-000CN
Scanner spring, tension
Assemblies on page 167
See Control-panel
overlays on page 157.
Control-panel overlay
Assemblies on page 167
Numerical parts list 179
180 Chapter 7 Parts
ENWW
A
Service and support
Hewlett-Packard limited warranty statement
HP PRODUCT
DURATION OF LIMITED WARRANTY
HP LaserJet M1120 and M1120n
One-year limited warranty
HP warrants to you, the end-user customer, that HP hardware and accessories will be free from defects in materials
and workmanship after the date of purchase, for the period specified above. If HP receives notice of such defects
during the warranty period, HP will, at its option, either repair or replace products which prove to be defective.
Replacement products may be either new or equivalent in performance to new.
HP warrants to you that HP software will not fail to execute its programming instructions after the date of purchase,
for the period specified above, due to defects in material and workmanship when properly installed and used. If
HP receives notice of such defects during the warranty period, HP will replace software which does not execute
its programming instructions due to such defects.
HP does not warrant that the operation of HP products will be uninterrupted or error free. If HP is unable, within a
reasonable time, to repair or replace any product to a condition as warranted, you will be entitled to a refund of
the purchase price upon prompt return of the product.
HP products may contain remanufactured parts equivalent to new in performance or may have been subject to
incidental use.
Warranty does not apply to defects resulting from (a) improper or inadequate maintenance or calibration, (b)
software, interfacing, parts or supplies not supplied by HP, (c) unauthorized modification or misuse, (d) operation
outside of the published environmental specifications for the product, or (e) improper site preparation or
maintenance.
TO THE EXTENT ALLOWED BY LOCAL LAW, THE ABOVE WARRANTIES ARE EXCLUSIVE AND NO OTHER
WARRANTY OR CONDITION, WHETHER WRITTEN OR ORAL, IS EXPRESSED OR IMPLIED AND HP
SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY,
SATISFACTORY QUALITY, AND FITNESS FOR A PARTICULAR PURPOSE. Some countries/regions, states or
provinces do not allow limitations on the duration of an implied warranty, so the above limitation or exclusion might
not apply to you. This warranty gives you specific legal rights and you might also have other rights that vary from
country/region to country/region, state to state, or province to province. HP's limited warranty is valid in any country/
region or locality where HP has a support presence for this product and where HP has marketed this product. The
level of warranty service you receive may vary according to local standards. HP will not alter form, fit or function
of the product to make it operate in a country/region for which it was never intended to function for legal or regulatory
reasons.
TO THE EXTENT ALLOWED BY LOCAL LAW, THE REMEDIES IN THIS WARRANTY STATEMENT ARE YOUR
SOLE AND EXCLUSIVE REMEDIES. EXCEPT AS INDICATED ABOVE, IN NO EVENT WILL HP OR ITS
SUPPLIERS BE LIABLE FOR LOSS OF DATA OR FOR DIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL
ENWW
Hewlett-Packard limited warranty statement 181
(INCLUDING LOST PROFIT OR DATA), OR OTHER DAMAGE, WHETHER BASED IN CONTRACT, TORT, OR
OTHERWISE. Some countries/regions, states or provinces do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitation or exclusion may not apply to you.
THE WARRANTY TERMS CONTAINED IN THIS STATEMENT, EXCEPT TO THE EXTENT LAWFULLY
PERMITTED, DO NOT EXCLUDE, RESTRICT OR MODIFY AND ARE IN ADDITION TO THE MANDATORY
STATUTORY RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU.
Customer self repair warranty service
HP products are designed with many Customer Self Repair (CSR) parts to minimize repair time and
allow for greater flexibility in performing defective parts replacement. If during the diagnosis period, HP
identifies that the repair can be accomplished by the use of a CSR part, HP will ship that part directly to
you for replacement. There are two categories of CSR parts: 1) Parts for which customer self repair is
mandatory. If you request HP to replace these parts, you will be charged for the travel and labor costs
of this service. 2) Parts for which customer self repair is optional. These parts are also designed for
Customer Self Repair. If, however, you require that HP replace them for you, this may be done at no
additional charge under the type of warranty service designated for your product.
Based on availability and where geography permits, CSR parts will be shipped for next business day
delivery. Same-day or four-hour delivery may be offered at an additional charge where geography
permits. If assistance is required, you can call the HP Technical Support Center and a technician will
help you over the phone. HP specifies in the materials shipped with a replacement CSR part whether
a defective part must be returned to HP. In cases where it is required to return the defective part to HP,
you must ship the defective part back to HP within a defined period of time, normally five (5) business
days. The defective part must be returned with the associated documentation in the provided shipping
material. Failure to return the defective part may result in HP billing you for the replacement. With a
customer self repair, HP will pay all shipping and part return costs and determine the courier/carrier to
be used.
182 Appendix A Service and support
ENWW
Print cartridge limited warranty statement
This HP product is warranted to be free from defects in materials and workmanship.
This warranty does not apply to products that (a) have been refilled, refurbished, remanufactured or
tampered with in any way, (b) experience problems resulting from misuse, improper storage, or
operation outside of the published environmental specifications for the device product or (c) exhibit wear
from ordinary use.
To obtain warranty service, please return the product to place of purchase (with a written description of
the problem and print samples) or contact HP customer support. At HP's option, HP will either replace
products that prove to be defective or refund your purchase price.
TO THE EXTENT ALLOWED BY LOCAL LAW, THE ABOVE WARRANTY IS EXCLUSIVE AND NO
OTHER WARRANTY OR CONDITION, WHETHER WRITTEN OR ORAL, IS EXPRESSED OR
IMPLIED AND HP SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY, SATISFACTORY QUALITY, AND FITNESS FOR A PARTICULAR PURPOSE.
TO THE EXTENT ALLOWED BY LOCAL LAW, IN NO EVENT WILL HP OR ITS SUPPLIERS BE
LIABLE FOR DIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST PROFIT OR
DATA), OR OTHER DAMAGE, WHETHER BASED IN CONTRACT, TORT, OR OTHERWISE.
THE WARRANTY TERMS CONTAINED IN THIS STATEMENT, EXCEPT TO THE EXTENT
LAWFULLY PERMITTED, DO NOT EXCLUDE, RESTRICT OR MODIFY AND ARE IN ADDITION TO
THE MANDATORY STATUTORY RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU.
ENWW
Print cartridge limited warranty statement 183
Customer support
Get telephone support, free during your warranty period, for
your country/region
Country/region phone numbers are on the flyer that was in the
box with your product or at www.hp.com/support/.
Have the product name, serial number, date of purchase, and
problem description ready.
Get 24-hour Internet support
www.hp.com/support/LJM1120
Get support for products used with a Macintosh computer
www.hp.com/go/macosx
Download software utilities, drivers, and electronic information
www.hp.com/go/LJM1120_software
Order supplies and paper
www.hp.com/go/suresupply
Order genuine HP parts or accessories
www.hp.com/buy/parts
Order additional HP service or maintenance agreements
www.hp.com/go/carepack
HP maintenance agreements
HP has several types of maintenance agreements that meet a wide range of support needs.
Maintenance agreements are not part of the standard warranty. Support services may vary by area.
Check with your local HP dealer to determine the services available to you.
Repacking the device
If HP Customer Care determines that your device needs to be returned to HP for repair, follow the steps
below to repack the device before shipping it.
CAUTION: Shipping damage as a result of inadequate packing is the customer’s responsibility.
1.
Remove and retain the print cartridge.
CAUTION: It is extremely important to remove the print cartridge before shipping the device. A
print cartridge that remains in the device during shipping will leak and entirely cover the device
engine and other parts with toner.
To prevent damage to the print cartridge, avoid touching the roller on it, and store the print cartridge
in its original packing material or so that it is not exposed to light.
2.
Remove and retain the power cable, interface cable, and optional accessories.
3.
If possible, include print samples and 50 to 100 sheets of paper or other print media that did not
print correctly.
4.
In the U.S., call HP Customer Care to request new packing material. In other areas, use the original
packing material, if possible. Hewlett-Packard recommends insuring the equipment for shipment.
Extended warranty
HP Support provides coverage for the HP hardware product and all HP-supplied internal components.
The hardware maintenance covers a 1- to 3-year period from date of the HP product purchase. The
customer must purchase HP Support within the stated factory warranty. For more information, contact
the HP Customer Care Service and Support group.
184 Appendix A Service and support
ENWW
B
Specifications
This section contains the following information about the product:
ENWW
●
Physical specifications
●
Electrical specifications
●
Power consumption
●
Environmental specifications
●
Acoustic emissions
185
Physical specifications
Table B-1 Physical specifications
Product
Height
Depth
Width
Weight
HP LaserJet M1120
308 mm (12.1 in)
363 mm (14.3 in)
437 mm (17.2 in)
8.2 kg (18.7 lb)
HP LaserJet M1120n
308 mm (12.1 in)
363 mm (14.3 in)
437 mm (17.2 in)
8.2 kg (18.7 lb)
Electrical specifications
CAUTION: Power requirements are based on the country/region where the product is sold. Do not
convert operating voltages. This will damage the product and void the product warranty.
Table B-2 Electrical specifications
Item
110-volt models
230-volt models
Power requirements
110 to 127 V (+/- 10%)
220 to 240 V (+/- 10%)
50 / 60 Hz (+/- 2 Hz)
50 / 60 Hz (+/- 2 Hz)
4.9 A
2.9 A
Rated current
Power consumption
Table B-3 Power consumption (average, in watts)1
Product model
Printing2
Copying2
Ready/Sleep3
Off
HP LaserJet M1120
420 W
420 W
5W
<0.1 W
HP LaserJet M1120n
420 W
420 W
8W
<0.1 W
1
Values are based on preliminary data. See www.hp.com/support/LJM1120 for current information.
2
Power reported is highest values measured using all standard voltages.
3
Instant on fuser technology.
4
Recovery time from Ready/Sleep to start of printing < 6 seconds.
5
Maximum heat dissipation for all models in Ready mode = 30 BTU/hour
186 Appendix B Specifications
ENWW
Environmental specifications
Table B-4 Environmental specifications1
Temperature
Relative humidity
1
Recommended
Operating
Storage
15° to 32.5° C
15° to 32.5° C
–20° to 40° C
(59° to 90.5° F)
(59° to 90.5° F)
(–4° to 104° F)
10% to 80%
10% to 80%
95% or less
Values are subject to change.
Acoustic emissions
Table B-5 Acoustic emissions
ENWW
Sound Power Level
Declared per ISO 92961
Printing (19 ppm)
LWAd = 6.6 Bels(A) [66 dB(A)]
Ready
Inaudible
Sound Pressure Level - Bystander Position
Declared per ISO 92961
Printing (19 ppm)
LpAm = 53 dB(A)
Ready
Inaudible
1
Values are based on preliminary data. See www.hp.com/support/LJM1120 for current information.
2
Configuration tested: HP LaserJet M1120 printing simplex using A4 paper at 19 ppm.
Environmental specifications 187
188 Appendix B Specifications
ENWW
C
Regulatory information
This section contains the following regulatory information:
ENWW
●
FCC compliance
●
Environmental product stewardship program
●
Declaration of conformity
●
Safety statements
189
FCC compliance
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant
to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses, and can radiate radio
frequency energy. If it is not installed and used in accordance with the instructions, it may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the following measures:
●
Reorient or relocate the receiving antenna.
●
Increase separation between equipment and receiver.
●
Connect equipment to an outlet on a circuit different from that to which the receiver is located.
●
Consult your dealer or an experienced radio/TV technician.
NOTE: Any changes or modifications to the printer that are not expressly approved by HewlettPackard could void the user's authority to operate this equipment.
Use of a shielded interface cable is required to comply with the Class B limits of Part 15 of FCC rules.
Environmental product stewardship program
Protecting the environment
Hewlett-Packard Company is committed to providing quality products in an environmentally sound
manner. This product has been designed with several attributes to minimize impacts on our environment.
Ozone production
This product generates no appreciable ozone gas (O3).
Power consumption
Power usage drops significantly while in Ready/Sleep mode, which saves natural resources and saves
money without affecting the high performance of this product. To determine the ENERGY STAR®
qualification status for this product see the Product Data Sheet or Specifications Sheet. Qualified
products are also listed at:
http://www.hp.com/hpinfo/globalcitizenship/environment/productdesign/ecolabels.html
Toner consumption
EconoMode uses less toner, which might extend the life of the print cartridge.
Paper use
This product’s duplex feature (two-sided printing) and N-up printing (multiple pages printed on one page)
capability can reduce paper usage and the resulting demands on natural resources.
190 Appendix C Regulatory information
ENWW
Plastics
Plastic parts over 25 grams are marked according to international standards that enhance the ability to
identify plastics for recycling purposes at the end of the product’s life.
HP LaserJet print supplies
It’s easy to return and recycle your empty HP LaserJet print cartridges—free of charge—with HP Planet
Partners. Multilingual program information and instructions are included in every new HP LaserJet print
cartridge and supplies package. You help reduce the toll on the environment further when you return
multiple cartridges together rather than separately.
HP is committed to providing inventive, high-quality products and services that are environmentally
sound, from product design and manufacturing to distribution, customer use and recycling. When you
participate in the HP Planet Partners program, we ensure your HP LaserJet print cartridges are recycled
properly, processing them to recover plastics and metals for new products and diverting millions of tons
of waste from landfills. Since this cartridge is being recycled and used in new materials, it will not be
returned to you. Thank you for being environmentally responsible!
NOTE: Use the return label to return original HP LaserJet print cartridges only. Please do not use this
label for HP inkjet cartridges, non-HP cartridges, refilled or remanufactured cartridges or warranty
returns. For information about recycling your HP inkjet cartridges please go to http://www.hp.com/
recycle.
Return and recycling instructions
United States and Puerto Rico
The enclosed label in the HP LaserJet toner cartridge box is for the return and recycling of one or more
HP LaserJet print cartridges after use. Please follow the applicable instructions below.
Multiple returns (two to eight cartridges)
1.
Package each HP LaserJet print cartridge in its original box and bag.
2.
Tape up to eight single boxes together using strapping or packaging tape (up to 70 lbs).
3.
Use a single pre-paid shipping label.
OR
1.
Use your own suitable box, or request a free bulk collection box from the http://www.hp.com/
recycle or 1-800-340-2445 (holds up to eight HP LaserJet print cartridges).
2.
Use a single pre-paid shipping label.
Single returns
1.
Package the HP LaserJet print cartridge in its original bag and box.
2.
Place the shipping label on the front of the box.
Shipping
For all HP LaserJet print cartridge recycling returns, give the package to UPS during your next delivery
or pickup, or take it to an authorized UPS drop-off center. For the location of your local UPS drop-off
center, call 1-800-PICKUPS or visit http://www.ups.com. If you are returning via USPS label, give the
ENWW
Environmental product stewardship program 191
package to a U.S. Postal Service carrier or drop off at a U.S.Postal Service Office. For more information,
or to order additional labels or boxes for bulk returns, visit http://www.hp.com/recycle or call
1-800-340-2445. Requested UPS pickup will be charged normal pickup rates. Information subject to
change without notice.
Non-US returns
To participate in HP Planet Partners return and recycling program, just follow the simple directions in
the recycling guide (found inside the packaging of your new printer supply item) or visit
http://www.hp.com/recycle. Select your country/region for information on how to return your HP LaserJet
printing supplies.
Paper
This product is capable of using recycled papers when the paper meets the guidelines outlined in the
HP LaserJet Printer Family Print Media Guide. This product is suitable for the use of recycled paper
according to EN12281:2002.
Material restrictions
This HP product does not contain added mercury.
This HP product does not contain a battery.
Disposal of waste equipment by users in private households in the
European Union
This symbol on the product or on its packaging indicates that this product must not be disposed of with
your other household waste. Instead, it is your responsibility to dispose of your waste equipment by
handing it over to a designated collection point for the recycling of waste electrical and electronic
equipment. The separate collection and recycling of your waste equipment at the time of disposal will
help to conserve natural resources and ensure that it is recycled in a manner that protects human health
and the environment. For more information about where you can drop off your waste equipment for
recycling, please contact your local city office, your household waste disposal service or the shop where
you purchased the product.
Material Safety Data Sheet (MSDS)
Material Safety Data Sheets (MSDS) for supplies containing chemical substances (for example, toner)
can be obtained by contacting the HP Web site at www.hp.com/go/msds or www.hp.com/hpinfo/
globalcitizenship/environment.
For more information
To obtain information about these environmental topics:
●
Product environmental profile sheet for this and many related HP products
●
HP’s commitment to the environment
●
HP’s environmental management system
192 Appendix C Regulatory information
ENWW
●
HP’s end-of-life product return and recycling program
●
Material Safety Data Sheets
Visit www.hp.com/go/environment or www.hp.com/hpinfo/globalcitizenship/environment/index.html.
ENWW
Environmental product stewardship program 193
Declaration of conformity
Declaration of Conformity
according to ISO/IEC 17050-1 and EN 17050-1
Manufacturer's Name:
Manufacturer's Address:
Hewlett-Packard Company
DoC#: BOISB-0604-03-rel.1.0
11311 Chinden Boulevard,
Boise, Idaho 83714-1021, USA
declares, that the product
Product Name:
HP LaserJet M1120 Series
Regulatory Model Number2)
Product Options:
Print Cartridges:
BOISB-0604-03
ALL
CB436A
conforms to the following Product Specifications:
SAFETY:
IEC 60950-1:2001 / EN60950-1: 2001 +A11
IEC 60825-1:1993 +A1 +A2 / EN 60825-1:1994 +A1 +A2 (Class 1 Laser/LED Product)
GB4943-2001
EMC:
CISPR22:2005 / EN55022:2006 – Class B1)
EN 61000-3-2:2000 +A2
EN 61000-3-3:1995 +A1
EN 55024:1998 +A1 +A2
FCC Title 47 CFR, Part 15 Class B / ICES-003, Issue 4
GB9254-1998, GB17625.1-2003
Supplementary Information:
The product herewith complies with the requirements of the EMC Directive 2004/108/EC and the Low Voltage Directive 2006/95/EC and
carries the CE-Marking
accordingly.
This Device complies with Part 15 of the FCC Rules. Operation is subject to the following two Conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
1) The product was tested in a typical configuration with Hewlett-Packard Personal Computer Systems.
2) For regulatory purposes, this product is assigned a Regulatory model number. This number should not be confused with the product name
or the product number(s).
Boise, Idaho , USA
August 2007
For regulatory topics only:
European Contact: Your Local Hewlett-Packard Sales and Service Office or Hewlett-Packard GmbH, Department HQ-TRE / Standards
Europe,, Herrenberger Strasse 140, , D-71034, Böblingen, (FAX: +49-7031-14-3143), http://www.hp.com/go/certificates
USA Contact:
Product Regulations Manager, Hewlett-Packard Company,, PO Box 15, Mail Stop 160, Boise, ID 83707-0015, , (Phone:
208-396-6000)
194 Appendix C Regulatory information
ENWW
Safety statements
Laser safety
The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration has
implemented regulations for laser products manufactured since August 1, 1976. Compliance is
mandatory for products marketed in the United States. The device is certified as a “Class 1” laser product
under the U.S. Department of Health and Human Services (DHHS) Radiation Performance Standard
according to the Radiation Control for Health and Safety Act of 1968. Since radiation emitted inside the
device is completely confined within protective housings and external covers, the laser beam cannot
escape during any phase of normal user operation.
WARNING! Using controls, making adjustments, or performing procedures other than those specified
in this guide may result in exposure to hazardous radiation.
Canadian DOC regulations
Complies with Canadian EMC Class B requirements.
« Conforme à la classe B des normes canadiennes de compatibilité électromagnétiques. « CEM ». »
EMI statement (Korea)
ENWW
Safety statements 195
Laser statement for Finland
Luokan 1 laserlaite
Klass 1 Laser Apparat
HP LaserJet M1120, M1120n, laserkirjoitin on käyttäjän kannalta turvallinen luokan 1 laserlaite.
Normaalissa käytössä kirjoittimen suojakotelointi estää lasersäteen pääsyn laitteen ulkopuolelle.
Laitteen turvallisuusluokka on määritetty standardin EN 60825-1 (1994) mukaisesti.
VAROITUS !
Laitteen käyttäminen muulla kuin käyttöohjeessa mainitulla tavalla saattaa altistaa käyttäjän
turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle.
VARNING !
Om apparaten används på annat sätt än i bruksanvisning specificerats, kan användaren utsättas för
osynlig laserstrålning, som överskrider gränsen för laserklass 1.
HUOLTO
HP LaserJet M1120, M1120n - kirjoittimen sisällä ei ole käyttäjän huollettavissa olevia kohteita. Laitteen
saa avata ja huoltaa ainoastaan sen huoltamiseen koulutettu henkilö. Tällaiseksi huoltotoimenpiteeksi
ei katsota väriainekasetin vaihtamista, paperiradan puhdistusta tai muita käyttäjän käsikirjassa
lueteltuja, käyttäjän tehtäväksi tarkoitettuja ylläpitotoimia, jotka voidaan suorittaa ilman erikoistyökaluja.
VARO !
Mikäli kirjoittimen suojakotelo avataan, olet alttiina näkymättömällelasersäteilylle laitteen ollessa
toiminnassa. Älä katso säteeseen.
VARNING !
Om laserprinterns skyddshölje öppnas då apparaten är i funktion, utsättas användaren för osynlig
laserstrålning. Betrakta ej strålen. Tiedot laitteessa käytettävän laserdiodin säteilyominaisuuksista:
Aallonpituus 775-795 nm Teho 5 m W Luokan 3B laser.
Substances table (China)
根据中国电 子信息产 品污 染控制管理办 法的要求而出台
Table C-1 有毒有害物质 表
部件名称
有毒有害物质 和元素
铅 (Pb)
汞 (Hg)
镉 (Cd)
六价铬 (Cr(VI))
多溴 溴 苯 (PBB)
多溴 二苯醚
(PBDE)
打印引擎
X
O
X
X
O
O
复 印机组 件
X
O
O
O
O
O
控制面板
O
O
O
O
O
O
塑料外壳
O
O
O
O
O
O
格式化板组 件
X
O
O
O
O
O
碳粉盒
X
O
O
O
O
O
196 Appendix C Regulatory information
ENWW
O:表示在此部件所用的所有同类 材料中,所含的此有毒或有害物质 均低于 SJ/T11363-2006 的限制要
求。
X:表示在此部件所用的所有同类 材料中,至少一种 所含的此有毒或有害物质 高于 SJ/T11363-2006 的限
制要求。
NOTE: 引用的“环 保使用期限”是根据在正常温度和湿度条件下操作使用产 品而确定的。
ENWW
Safety statements 197
198 Appendix C Regulatory information
ENWW
Index
Symbols/Numerics
600 dpi print-quality setting 118
A
accessibility features 4
accessories
part numbers 152
acoustic emissions 187
advanced software installation
after service checklist 50
alert messages 108
archive print setting 138
assemblies
high-voltage connector,
cleaning 134
part numbers 166
B
background shading,
troubleshooting 121
bands and streaks,
troubleshooting 120
batteries included 192
before service checklist 49
bin, output
capacity 4
jams, clearing 115
locating 5
blank copies,
troubleshooting 130
blank scans, troubleshooting
box, unpack contents 18
8
126
C
cables
flat flexible, remove parts 48
part numbers 152
USB and network not
included 18
Canadian DOC regulations 195
ENWW
capacity
output bin 4
cartridge
part number 152
cartridge-door
remove 76
cartridge-door release, locating 5
cartridges
drum rotation test 131
high-voltage contacts,
cleaning 133
HP fraud hotline 27
recycling 191
remove 65
replacing 25
status, checking 24
storing 24
warranty 183
caution
toner on clothing 26
characters, troubleshooting 122
checklists
after service 50
before service 49
print quality 119
checks
engine test page 131
half-self-test 132
heating element 133
high-voltage power
supply 133
circuit diagram 149
cleaning
exterior 28
flatbed scanner glass 28
glass 28
high-voltage connection
points 134
lid backing 28
paper path 29
scanner glass 28
cleaning page, printing 138
component
diagram 147
components
internal, locating 38
configuration page
printing 30
connectors
ECU 143
Formatter 142
contact image sensor (CIS) 36
control panel
cleaning page, printing 29
messages,
troubleshooting 108
overlay, remove 57
overlays part numbers 157
remove 58
secondary service menu 135
Service menu 138
copy quality
troubleshooting 127
copy-quality test 51
copying
media, troubleshooting 128
quality, troubleshooting 127
size, troubleshooting 130
troubleshooting 130
covers
part numbers 168
covers, remove
front 79
fuser 77
print-cartridge 76
rear 77
side 74
creases, troubleshooting 123
Index 199
crooked pages 122
curled media 122, 138
cushions, scanner
installing 70
customer support
online 184
repacking device 184
D
dark copying 128
defaults, restoring 138
defects, repetitive 140
delivery roller
locating 38
Demo page, printing 137
demo page, printing 30
diagrams
troubleshooting 140
dimensions
media 12
disposal, end-of-life 192
documentation 2
documentation, part
numbers 160
door, cartridge
remove 76
dots per inch (dpi)
print settings 118
specifications 4
dots, troubleshooting
copies 128
dpi (dots per inch)
print settings 118
specifications 4
drivers
operating systems
supported 7
drum
photosensitive 38
drum rotation test 131
E
easy software installation 7
ECU
connectors 143
electrical specifications 186
electrostatic discharge (ESD) 49
embedded Web server 9, 10
embedded Web server (EWS)
features 30
200 Index
end-of-life disposal 192
engine control system 39
engine test page 131
environmental specifications 16,
187
environmental stewardship
program 190
error messages
control panel 108
critical 109
ESD (electrostatic discharge) 49
European Union, waste
disposal 192
extended warranty 184
F
factory-set defaults,
restoring 138
faded print 120
FastRes 4
FCC compliance 190
features
product 4
feed roller, locating 38
Finnish laser safety
statement 196
firmware updates 150
flat, flexible cables
remove parts 48
flatbed scanner
glass, cleaning 28
Formatter
connectors 142
formatter
remove 81
fraud hotline 27
front cover
remove 79
fuser
cover, remove 77
remove 96
warranty 183
fuser assembly
diagrams 147
fuser sleeve
locating 38
fuser unit
locating 38
G
Getting Started Guide 2
getting started guides, part
numbers 160
glass, cleaning 28
gray background,
troubleshooting 121
guidelines
supplies, storing 24
guides, documentation 2
H
half-self-test functional check 132
heating element check 133
high-voltage connector assembly,
cleaning 134
high-voltage contacts
cleaning 133
high-voltage PCA 39
high-voltage power supply,
checking 133
hinge tool
part number 152
HP Customer Care 184
HP Director, Macintosh 10
HP fraud hotline 27
HP SupportPack 184
HP Web Jetadmin
using 30
humidity specifications
environment 187
I
image quality
archive print setting 138
cleaning page, printing 138
copy, troubleshooting 127
print, troubleshooting 118,
119
repetitive image defects 140
scans, troubleshooting 124,
126
image-formation system
operations 43
testing 132
information pages
configuration 137
demo page 137
menu map 137
ENWW
input tray
loading media 19
install
tray 1 20
installation, software
advanced 8
easy 7
installing
Windows software 7
installing hardware
scanner cushions 70
interface ports
cables, ordering 152
locating 6, 141
types included 4
internal components 38
internal components, part
numbers 170
J
jams
causes of 111
locating 112
output-bin, clearing 115
preventing 117
print cartridge area,
clearing 116
trays, clearing 112
K
Korean EMI statement
195
L
laser safety statements 195, 196
laser/scanner assembly
diagrams 147
protective cover 48
remove 89
laser/scanner system
operations 41
laser/scanner unit
locating 38
left-side cover
remove 74
lid, cleaning 28
life expectancies, supplies 24
light copying 128
light print, troubleshooting 120
lightness
faded print,
troubleshooting 120
ENWW
lines, troubleshooting
copies 128
printed pages 120
link assemblies, remove 53
loading media
priority input tray 19
locating
internal components 38
loose toner, troubleshooting 121
M
Macintosh
drivers supported 7
Intel Core Processor 7
PPC 7
support 184
supported operating
systems 7
system requirements 17
uninstall software 11
main input tray
remove 71
main motor, remove 93
maintenance agreements 184
manuals 2
material restrictions 192
Material Safety Data Sheet
(MSDS) 192
media
curled, troubleshooting 122,
138
feeding operations 42
jams 111
pickup/feed/delivery
system 42
supported sizes 12
wrinkled 123
memory
NVRAM initialization 135
specifications 4
menu map
printing 30
menus
secondary service 135
Service 138
mercury-free product 192
messages
control panel 108
critical 109
model
number, locating 6
motor
location 144
motors
remove 93
multi-purpose tray, locating
38
N
network port
locating 6, 141
noise specifications 187
non-HP supplies
HP policy 26
NVRAM initialization
troubleshooting 135
O
on/off switch, locating 5
online support 184
operating environment,
specifications 16, 187
operating systems supported 7
operation sequence 34
operations
engine control system 39
image-formation system 43
laser/scanner system 41
pickup/feed/delivery
system 42
scanner 36
order of
remove and replace parts 52
ordering supplies and
accessories 152
output bin
capacity 4
locating 5
output quality
archive print setting 138
cleaning page, printing 138
copy, troubleshooting 127
print, troubleshooting 118,
119
repetitive image defects 140
scans, troubleshooting 124,
126
overlay, control panel
remove 57
Index 201
overlays, control panel
part numbers 157
P
packaging device 184
pages
skewed 122
pages per minute 4
paper
curled, troubleshooting 122,
138
feeding operations 42
jams 111
pickup/feed/delivery
system 42
supported sizes 12
supported types 13
wrinkled 123
paper jams
detection operations, pickup/
feed/delivery system 42
paper path, cleaning 138
paper-pickup assembly
remove 100
part numbers
cables 152
control-panel overlays 157
covers 168
documentation 160
internal components 170
scanner assemblies 164
screws 163
supplies 152
parts
about remove and replace 48
order of removal 52
remove 52
PCAs, diagrams 148
phone numbers
HP fraud hotline 27
photos
scanning, troubleshooting 124
photosensitive drum rotation
test 131
photosensitive drum, locating 38
physical specifications 186
pickup
solenoid 144
pickup assembly
diagrams 147
202 Index
pickup roller
replacing product 67
pickup roller, locating 38
pickup/feed/delivery system
main motor, locating 42
operations 42
pickup solenoid, locating 42
sensors, locating 42
ports
cables, ordering 152
locating 6, 141
types included 4
post-service tests 51
power
high-voltage PCA 39
high-voltage, testing 133
requirements 186
sequence of operations 35
power consumption 186
power supplies
remove 82
unplugging 48
power supply
high-voltage contacts
check 133
power switch, locating 5
pressure roller
locating 38
print cartridge
part number 152
toner, removing from
clothing 26
print cartridge area jams,
clearing 116
print cartridges
door release, locating 5
drum rotation test 131
high-voltage contacts 133
HP fraud hotline 27
recycling 191
remove 65
replacing 25
status, checking 24
storing 24
warranty 183
print defects, troubleshooting 119
print media
supported 12
print quality
archive print setting 138
cleaning page, printing 138
repetitive image defects 140
settings 118
troubleshooting 118, 119
print-cartridge door
remove 76
print-quality test 51
printing
configuration page 30
demo page 30
menu map 30
priority input tray
jams, clearing 112
loading 19
locating 5
product
basic operation 34
cleaning 28
formatter, replace 81
front cover, remove 79
fuser cover, remove 77
fuser, replace 96
internal components 38
laser/scanner assembly,
replace 89
main motor, replace 93
operation sequence 34
paper-pickup assembly,
replace 100
power supply, replace 82
print-cartridge door,
remove 76
rear cover, remove 77
scanner cushions,
installing 70
scanner support frame,
remove 86
sequence of operations 34
serial number, locating 6
side covers, remove 74
supplies, life expectancies 24
transfer roller, replace 73
tray, remove 71
product base
front cover, remove 79
fuser cover, remove 77
fuser, replace 96
laser/scanner assembly,
replace 89
main motor, replace 93
ENWW
paper-pickup assembly,
replace 100
power supply, replace 82
print-cartridge door,
remove 76
rear cover, remove 77
scanner cushions,
installing 70
scanner support frame,
remove 86
side covers, remove 74
transfer roller, replace 73
tray, remove 71
Q
quality
archive print setting 138
cleaning page, printing 138
copy, troubleshooting 127
print settings 118
print, troubleshooting 118,
119
repetitive image defects 140
scans, troubleshooting 124,
126
R
rear cover
remove 77
recycling
HP printing supplies returns and
environmental program 191
regulatory information 190
remove
control panel 58
control panel overlay 57
formatter 81
front cover 79
fuser 96
fuser cover 77
laser/scanner assembly 89
link assemblies 53
main motor 93
media input tray 71
order of 52
paper-pickup assembly 100
parts 48, 52
power supply 82
print cartridge 65
print-cartridge door 76
ENWW
rear cover 77
scanner assembly 60
scanner lid 56
scanner support frame 86
scanner support-frame
spring, 53
side covers 74
transfer roller 73
repacking device 184
repetitive defects,
troubleshooting 123, 140
replace
control panel 58
formatter 81
front cover 79
fuser 96
fuser cover 77
laser/scanner assembly 89
link assemblies 53
main motor 93
media input tray 71
order of 52
paper-pickup assembly 100
parts 48, 52
power supply 82
print cartridges 65
print-cartridge door 76
rear cover 77
scanner assembly 52, 60
scanner lid 56
scanner support frame 86
scanner support-frame
spring 53
side covers 74
supplies, life expectancies 24
transfer roller 73
replacing
scanner cushions 70
supplies 25
reports
configuration page 30
demo page 30
menu map 30
reports, product
configuration page 137
Demo page 137
resolution
features 4
print settings 118
specifications 4
restoring factory-set
defaults 138
right-side cover
remove 74
roller
delivery roller 38
pickup, locating 38
rollers
feed, locating 38
locating 38, 145
pickup, replacing 67
pressure roller 38
repetitive image defects 140
transfer, locating 38
transfer, remove 73
S
safety statements 195, 196
scan-image quality,
troubleshooting 124
scanner
cushions, installing 70
glass, cleaning 28
lid, remove 56
operations 36
remove 60
replace 52
support frame, remove 86
support-frame spring,
remove 53
scanner assemblies
part numbers 164
scanner hinge tool
part number 152
scanning
blank pages,
troubleshooting 126
quality, troubleshooting 124,
126
speed, troubleshooting 125
scatter, troubleshooting 123
screwdrivers, required 49
screws
self-tapping 48
types of 163
screws, replacing 48
secondary service menu 135
self-tapping screws 48
sensors
locating 146
Index 203
media detection 42
scanner operations 36
separation pad
replacing 66
separation pad, locating 38
separation pads
diagrams 147
sequence of operations 34
serial number, locating 6
service
critical error messages 109
part numbers 152
repacking device 184
secondary menu 135
service agreements 184
Service menu 138
servicing 49
servicing product 48
settings
configuration page 137
factory-set defaults,
restoring 138
NVRAM initialization 135
shipping device 184
side covers
remove product 74
size 186
size, copy
troubleshooting 130
skewed pages 122
slow speed, troubleshooting
scanning 125
smeared toner,
troubleshooting 121
software
advanced installation 8
components 7
easy installation 7
embedded Web server 9, 10,
30
HP Web Jetadmin 30
supported operating
systems 7
system requirements 17
uninstall 11
Windows 9
solenoid 144
specifications
acoustic emissions 187
electrical 186
204 Index
environmental 187
physical 186
product features 4
specks, troubleshooting 120
speed
print specifications 4
scanning, troubleshooting 125
spots, troubleshooting
scans 126
staple cassette
life expectancy 24
static, precautions 49
status
supplies, checking 24
storing
environmental
specifications 187
print cartridges 24
streaks, troubleshooting 120
supplies
HP fraud hotline 27
life expectancies 24
manage 24
non-HP supplies, HP
Policy 26
print cartridges, replacing 25
recycling 191
replacing 25
status, checking 24
storing 24
support
online 184
repacking device 184
support frame, scanner
remove 86
supported media 12
SupportPack, HP 184
system requirements 17
T
technical support
online 184
repacking device 184
telephone numbers
HP fraud hotline 27
temperature specifications
environment 187
tests
copy-quality 51
engine test page 131
half-self functional check 132
heating element 133
high-voltage power
supply 133
post-service 51
print-quality 51
text, troubleshooting 122
toner
cleaning page, printing 138
loose, troubleshooting 121
scatter, troubleshooting 123
smeared, troubleshooting 121
specks, troubleshooting 120
tools
required 49
troubleshooting 137
transfer roller
remove 73
transfer rollers, locating 38
transfer unit warranty 183
tray 1
install 20
jams, clearing 112
locating 5
trays
capacities 4
capacity 13
feeding operations 42
jams, clearing 112
multi-purpose, locating 38
pickup/feed/delivery
system 42
remove 71
troubleshooting
blank scans 126
checklist 106
cleaning page 138
configuration page 137
control panel messages 108
copy quality 127
copy size 130
copying 130
critical error messages 109
curled media 122, 138
demo page 137
diagrams 140
dots, copies 128
engine test page 131
faded print 120
half self-test 132
ENWW
heating element 133
image formation 132
information pages 137
jams 111
lines, copies 128
lines, printed pages 120
loose toner 121
menu map 137
NVRAM initialization 135
pages too dark 128
pages too light 128
print defects 119
print quality 118
repetitive defects 123
reports 137
scan quality 124, 126
scan-image quality 124
scanning 124
skewed pages 122
spots, scans 126
text 122
toner scatter 123
toner smear 121
toner specks 120
tools 137
wrinkles 123
wavy paper, troubleshooting 122
Web sites
customer support 184
documentation 2
Macintosh customer
support 184
Material Safety Data Sheet
(MSDS) 192
weight 186
white or faded stripes,
troubleshooting 127
Windows
drivers supported 7
software components 9
supported operating
systems 7
system requirements 17
uninstall software 11
wrinkles, troubleshooting 123
U
uninstall software 11
unplugging power cord 48
USB port
locating 6, 141
type included 4
User guide 2
user guides, part numbers 160
V
vertical lines,
troubleshooting 120
vertical white or faded
stripes 127
voltage requirements 186
W
warning messages 108
warranty
Customer self repair 182
extended 184
print cartridge 183
product 181
transfer unit and fuser 183
ENWW
Index 205
206 Index
ENWW
© 2008 Hewlett-Packard Development Company, L.P.
www.hp.com
*CB537-90945*
*CB537-90945*
CB537-90945