HP LaserJet M1120 mfp service manual

HP LaserJet M1120 MFP Series

Service Manual

HP LaserJet M1120 MFP Series

Service Manual

Copyright and License

© 2008 Copyright Hewlett-Packard

Development Company, L.P.

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

The information contained herein is subject to change without notice.

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

Trademark Credits

Adobe®, Acrobat®, and PostScript® are trademarks of Adobe Systems Incorporated.

Microsoft®, Windows®, and Windows NT® are U.S. registered trademarks of Microsoft Corporation.

UNIX® is a registered trademark of The Open Group.

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

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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

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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

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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

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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

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Laser statement for Finland .............................................................................................	196
Substances table (China) ................................................................................................	196
Index .................................................................................................................................................................	199

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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 .............................................................................................................................		196

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List of figures

Figure 4-1 System block diagram .....................................................................................................................		34
Figure 4-2 Optical system (1 of 2) ....................................................................................................................		36
Figure 4-3 Optical system (2 of 2) ....................................................................................................................		37
Figure 4-4 Cross-section of printer ...................................................................................................................		38
Figure 4-5 Engine control system .....................................................................................................................		39
Figure 4-6 Engine-control-system circuit diagram ............................................................................................		40
Figure 4-7	Laser/scanner system .....................................................................................................................	41
Figure 4-8	Pickup/feed/delivery system ...........................................................................................................	42
Figure 4-9	Image-formation system .................................................................................................................	43
Figure 4-10	Primary charging ...........................................................................................................................	43
Figure 4-11	Developing ....................................................................................................................................	44
Figure 4-12	Transfer .........................................................................................................................................	45
Figure 4-13	Separation .....................................................................................................................................	45
Figure 4-14	Fusing ...........................................................................................................................................	46
Figure 4-15	Drum cleaning ...............................................................................................................................	46
Figure 5-1 Phillips and pozidrive screwdriver comparison ...............................................................................		49
Figure 5-2 Parts removal order ........................................................................................................................		52
Figure 5-3 Remove the link assemblies and scanner support-frame spring (1 of 4) ........................................		53
Figure 5-4 Remove the link assemblies and scanner support-frame spring (2 of 4) ........................................		54
Figure 5-5 Remove the link assemblies and scanner support-frame spring (3 of 4) ........................................		54
Figure 5-6 Remove the link assemblies and scanner support-frame spring (4 of 4) ........................................		55
Figure 5-7 Remove the scanner lid (1 of 2) ......................................................................................................		56
Figure 5-8 Remove the scanner lid (2 of 2) ......................................................................................................		56
Figure 5-9 Remove the control-panel overlay ..................................................................................................		57
Figure 5-10 Remove the control-panel assembly (1 of 3) ................................................................................		58
Figure 5-11 Remove the control-panel assembly (2 of 3) ................................................................................		58
Figure 5-12 Remove the control-panel assembly (3 of 3) ................................................................................		59
Figure 5-13 Remove the scanner assembly (1 of 10) ......................................................................................		60
Figure 5-14 Remove the scanner assembly (2 of 10) ......................................................................................		60
Figure 5-15 Remove the scanner assembly (3 of 10) ......................................................................................		61
Figure 5-16 Remove the scanner assembly (4 of 10) ......................................................................................		61
Figure 5-17 Remove the scanner assembly (5 of 10) ......................................................................................		62
Figure 5-18 Remove the scanner assembly (6 of 10) ......................................................................................		62
Figure 5-19 Remove the scanner assembly (7 of 10) ......................................................................................		63
Figure 5-20 Remove the scanner assembly (8 of 10) ......................................................................................		63
Figure 5-21 Remove the scanner assembly (9 of 10) ......................................................................................		64
Figure 5-22 Remove the scanner assembly (10 of 10) ....................................................................................		64
Figure 5-23 Remove the print cartridge (1 of 2) ...............................................................................................		65
Figure 5-24 Remove the print cartridge (2 of 2) ...............................................................................................		65

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Figure 5-25 Remove the separation pad (1 of 2) .............................................................................................	66
Figure 5-26 Remove the separation pad (2 of 2) .............................................................................................	66
Figure 5-27 Remove the pickup roller (1 of 5) ..................................................................................................	67
Figure 5-28 Remove the pickup roller (2 of 5) ..................................................................................................	67
Figure 5-29 Remove the pickup roller (3 of 5) ..................................................................................................	68
Figure 5-30 Remove the pickup roller (4 of 5) ..................................................................................................	68
Figure 5-31 Remove the pickup roller (5 of 5) ..................................................................................................	69
Figure 5-32 Installing the scanner cushions .....................................................................................................	70
Figure 5-33 Remove the media input tray (1 of 3) ...........................................................................................	71
Figure 5-34 Remove the media input tray (2 of 3) ...........................................................................................	71
Figure 5-35 Remove the media input tray (3 of 3) ...........................................................................................	72
Figure 5-36 Remove the transfer roller ............................................................................................................	73
Figure 5-37 Remove the side covers (1 of 4) ...................................................................................................	74
Figure 5-38 Remove the side covers (2 of 4) ...................................................................................................	74
Figure 5-39 Remove the side covers (3 of 4) ...................................................................................................	75
Figure 5-40 Remove the side covers (4 of 4) ...................................................................................................	75
Figure 5-41 Remove the print-cartridge door (1 of 2) .......................................................................................	76
Figure 5-42 Remove the print-cartridge door (2 of 2) .......................................................................................	76
Figure 5-43 Remove the rear cover and fuser cover (1 of 3) ...........................................................................	77
Figure 5-44 Remove the rear cover and fuser cover (2 of 3) ...........................................................................	77
Figure 5-45 Remove the rear cover and fuser cover (3 of 3) ...........................................................................	78
Figure 5-46 Remove the front cover (1 of 4) ....................................................................................................	79
Figure 5-47 Remove the front cover (2 of 4) ....................................................................................................	79
Figure 5-48 Remove the front cover (3 of 4) ....................................................................................................	80
Figure 5-49 Remove the front cover (4 of 4) ....................................................................................................	80
Figure 5-50 Remove the formatter ...................................................................................................................	81
Figure 5-51 Remove the power supply (1 of 7) ................................................................................................	82
Figure 5-52 Remove the power supply (2 of 7) ................................................................................................	82
Figure 5-53 Remove the power supply (3 of 7) ................................................................................................	83
Figure 5-54 Remove the power supply (4 of 7) ................................................................................................	83
Figure 5-55 Remove the power supply (5 of 7) ................................................................................................	84
Figure 5-56 Remove the power supply (7 of 7) ................................................................................................	84
Figure 5-57 Remove the power supply (7 of 7) ................................................................................................	85
Figure 5-58 Remove the scanner support frame (1 of 5) .................................................................................	86
Figure 5-59 Remove the scanner support frame (2 of 5) .................................................................................	87
Figure 5-60 Remove the scanner support frame (3 of 5) .................................................................................	87
Figure 5-61 Remove the scanner support frame (4 of 5) .................................................................................	88
Figure 5-62 Remove the scanner support frame (5 of 5) .................................................................................	88
Figure 5-63 Remove the laser/scanner (1 of 7) ................................................................................................	89
Figure 5-64 Remove the laser/scanner (2 of 7) ................................................................................................	90
Figure 5-65 Remove the laser/scanner (3 of 7) ................................................................................................	90
Figure 5-66 Remove the laser/scanner (4 of 7) ................................................................................................	91
Figure 5-67 Remove the laser/scanner assembly (5 of 7) ...............................................................................	91
Figure 5-68 Remove the laser/scanner assembly (6 of 7) ...............................................................................	92
Figure 5-69 Remove the laser/scanner assembly (7 of 7) ...............................................................................	92
Figure 5-70 Remove the main motor (1 of 4) ...................................................................................................	93
Figure 5-71 Remove the main motor (2 of 4) ...................................................................................................	94
Figure 5-72 Remove the main motor (3 of 4) ...................................................................................................	94
Figure 5-73 Remove the main motor (4 of 4) ...................................................................................................	95
Figure 5-74 Remove the fuser (1 of 6) .............................................................................................................	96

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Figure 5-75 Remove the fuser (2 of 6) .............................................................................................................		97
Figure 5-76 Remove the fuser (3 of 6) .............................................................................................................		97
Figure 5-77 Remove the fuser (4 of 6) .............................................................................................................		98
Figure 5-78 Remove the fuser assembly (5 of 6) .............................................................................................		98
Figure 5-79 Remove the fuser assembly (6 of 6) .............................................................................................		99
Figure 5-80 Remove the paper-pickup assembly (1 of 4) ..............................................................................		100
Figure 5-81 Remove the paper-pickup assembly (2 of 4) ..............................................................................		101
Figure 5-82 Remove the paper-pickup assembly (3 of 4) ..............................................................................		101
Figure 5-83 Remove the paper-pickup assembly (4 of 4) ..............................................................................		102
Figure 5-84 Remove the drive-gear assembly and drive belt (1 of 4). ...........................................................		103
Figure 5-85 Remove the drive-gear assembly and drive belt (2 of 4). ...........................................................		103
Figure 5-86 Remove the drive-gear assembly and drive belt (3 of 4). ...........................................................		104
Figure 5-87 Remove the Drive-gear assembly and drive belt (4 of 4). ..........................................................		104
Figure 6-1 Print-cartridge high-voltage connection points (right side) ............................................................		133
Figure 6-2 Print-cartridge high-voltage connection points (left side) ..............................................................		134
Figure 6-3	Formatter connectors ....................................................................................................................	142
Figure 6-4	ECU connectors ............................................................................................................................	143
Figure 6-5 Solenoid and motor .......................................................................................................................		144
Figure 6-6	Rollers ...........................................................................................................................................	145
Figure 6-7	Sensors .........................................................................................................................................	146
Figure 6-8	Major components ........................................................................................................................	147
Figure 6-9 PCAs (base unit) ...........................................................................................................................		148
Figure 6-10	Circuit diagram ...........................................................................................................................	149
Figure 7-1	Scanner assemblies ......................................................................................................................	164
Figure 7-2	Assemblies ....................................................................................................................................	166
Figure 7-3 External covers and panels ..........................................................................................................		168
Figure 7-4 Internal components (1 of 3) .........................................................................................................		170
Figure 7-5 Internal components (2 of 3) .........................................................................................................		172
Figure 7-6 Internal components (3 of 3) .........................................................................................................		174

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1 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

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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
HP LaserJet M1120 MFP Series	Provides detailed information for using the product and problem-solving. Available on the
User Guide	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.

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Product comparison

The product is available in the following configurations.

	Base models	Network models
	● Print letter-size pages at speeds up to 20 pages per	Base model, plus:
	minute (ppm) and A4-size pages at speeds up to 19 ppm.	● 10/100 Base-T Ethernet network port.
	● Priority input tray holds up to 10 sheets of print media.
		● IPv4 network protocol.

●Tray 1 holds up to 250 sheets of print media or 10

envelopes.

●

IPv6 network protocol.

●Manual two-sided (duplex) printing and copying.

●Hi-Speed USB 2.0 port.

●32-megabyte (MB) random-access memory (RAM).

●Flatbed scanner.

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Product features

Print	● 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.
Economical printing	● Provides N-up printing (printing more than one page on a sheet).
	● Provides an EconoMode setting, which uses less toner.
Supplies	● 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.
Accessibility	● 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.

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Product walkaround

Front view

1 2

3

4 6 5

1Scanner lid

2Control panel

3Print-cartridge door latch

4Output bin

5Priority input tray

6Tray 1

Back view

7

8

9

7Interface ports

8Power switch

9Power connector

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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

1Hi-Speed USB 2.0 port

2Ethernet 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.

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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

●HP drivers

◦Printer driver

◦Scan driver

●HP MFP software

◦HP LaserJet Scan program

◦Uninstall program

●HP Update program

●HP Customer Participation program

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●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

●HP Product Setup Assistant

●HP Uninstaller

●HP LaserJet software

◦HP Scan

◦HP Director

◦Scan to e-mail program

◦HP Photosmart

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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

●Software installer — automates the printing system installation

●Online Web registration

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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.

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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.

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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

Size	Dimensions	Priority input tray	Tray 1
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)

1 These sizes are supported as custom sizes.

Table 1-3 Supported envelopes and postcards

Size	Dimensions	Priority input tray	Tray 1
Envelope #10	105 x 241 mm (4.13 x 9.49 in)
Envelope DL	110 x 220 mm (4.33 x 8.66 in)

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Table 1-3 Supported envelopes and postcards (continued)

Size	Dimensions	Priority input tray	Tray 1
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)

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
Color
Preprinted
Prepunched
Recycled
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	1 sheet	Up to 200 sheets.
	Overhead
Heavy	110 g/m2 (29 lb) to 125 g/m2	Up to 10 sheets	Not supported.
	(33 lb)
Letterhead	75 g/m2 (20 lb) to 104 g/m2 (27 lb)	Up to 10 sheets	Up to 250 sheets

1 The maximum stack height for tray 1 is 25 mm (1 inch).

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