HP 3050, 3052, 3055 Service manual

HP LaserJet 3050/3052/3055 All-in-One

Service Manual

HP LaserJet 3050/3052/3055 All-in-One

Service Manual

Copyright and License

© 2006 Copyright Hewlett-Packard

Development Company, LP

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

The information contained in this document 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.

Part number Q6502-90901

Edition 2, 4/2006

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Table of contents

1 Product information
All-in-one configurations .......................................................................................................................	2
HP LaserJet 3050 all-in-one ................................................................................................	2
HP LaserJet 3052/3055 all-in-one .......................................................................................	3
All-in-one features ................................................................................................................................	4
All-in-one parts .....................................................................................................................................	5
HP LaserJet 3050 all-in-one parts .......................................................................................	5
Front view ............................................................................................................	5
Back view ............................................................................................................	6
Interface ports .....................................................................................................	6
Control panel .......................................................................................................	7
HP LaserJet 3052/3055 all-in-one parts ..............................................................................	8
Front view ............................................................................................................	8
Back view ............................................................................................................	9
Interface ports .....................................................................................................	9
Control panel .....................................................................................................	10
Model and serial numbers .................................................................................................	11
Software installation ...........................................................................................................................	12
Typical installation .............................................................................................................	12
Minimum installation ..........................................................................................................	12
Printer drivers ....................................................................................................................	13
Supported printer drivers ...................................................................................	13
Additional drivers ...............................................................................................	13
Select the correct printer driver .........................................................................	14
Printer-driver Help (Windows) ...........................................................................	14
Gaining access to the printer drivers .................................................................	15
What other software is available? .....................................................................	15
Software for Windows ........................................................................................................	16
Software components for Windows ...................................................................	16
HP ToolboxFX ..................................................................................	16
Embedded Web server (EWS) .........................................................	16
Using Add or Remove Programs to uninstall ....................................................	16
Software for Macintosh ......................................................................................................	18
HP Director ........................................................................................................	18
Macintosh Configure Device (Mac OS X V10.3 and Mac OS X V10.4) ............	18
PDEs (Mac OS X V10.3 and Mac OS X V10.4) ................................................	19
Installing software for Macintosh .......................................................................	19
Installing Macintosh printing system software for direct
connections (USB) ............................................................................	19
Installing Macintosh printing system software for networks ..............	20

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To remove software from Macintosh operating systems ...................................	20
Choosing paper and other print media ...............................................................................................	21
Supported media weights and sizes ..................................................................................	21
Media to avoid ...................................................................................................................	23
Media that can damage the all-in-one ...............................................................................	23
2 Operation
Site preparation ..................................................................................................................................	26
Prepare the location ...........................................................................................................	26
Operating environment ......................................................................................................	26
Minimum system requirements ..........................................................................................	27
Unpacking ..........................................................................................................................................	28
Contents of the HP LaserJet 3050 all-in-one box ..............................................................	28
Contents of the HP LaserJet 3052/3055 all-in-one box .....................................................	29
Installing input devices .......................................................................................................................	30
Installing the print cartridge ................................................................................................................	32
Loading media into the input trays .....................................................................................................	34
Loading documents to fax, copy, or scan ..........................................................................	34
Loading input trays ............................................................................................................	36
Priority input slot ................................................................................................	36
250-sheet input tray (tray 1) ..............................................................................	36
3 Maintenance
Managing supplies .............................................................................................................................	38
Life expectancies of print cartridges and parts that wear .................................................	38
Ordering supplies ...............................................................................................................	38
Storing print cartridges .......................................................................................................	38
Replacing and recycling supplies ......................................................................................	39
Changing the print cartridge ..............................................................................	39
Changing the ADF pickup roller and load-arm assembly (HP LaserJet
3052/3055 all-in-one) ........................................................................................	39
HP policy on non-HP supplies ...........................................................................................	39
HP fraud hotline .................................................................................................................	39
Cleaning the all-in-one .......................................................................................................................	40
To clean the exterior ..........................................................................................................	40
To clean the ADF scanner glass and white platen (HP LaserJet 3050 all-in-one) ............	40
To clean the flatbed glass and the ADF scanner glass (HP LaserJet 3052/3055 all-in-
one) ....................................................................................................................................	42
To clean the lid backing (HP LaserJet 3052/3055 all-in-one) ............................................	43
To clean the ADF pickup-roller assembly (HP LaserJet 3052/3055 all-in-one) .................	44
Cleaning the paper path ....................................................................................................	47
To clean the paper path from HP ToolboxFX ....................................................	47
To clean the paper path from the all-in-one control panel .................................	48
Calibrating the scanner ......................................................................................................................	49
Managing and maintaining the all-in-one ...........................................................................................	50
Information pages ..............................................................................................................	50
Demo page ........................................................................................................	50
Usage page .......................................................................................................	50
Configuration page ............................................................................................	51
Network configuration page ..............................................................................	52

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Fax logs and reports .........................................................................................	52
HP ToolboxFX ...................................................................................................................	53
To view HP ToolboxFX .....................................................................................	53
Status ................................................................................................................	54
Event log ...........................................................................................	54
Fax ....................................................................................................................	55
Fax tasks ..........................................................................................	55
Fax phone book ................................................................................	55
Fax Send Log ...................................................................................	57
Fax Receive Log ...............................................................................	57
Help ...................................................................................................................	57
System settings .................................................................................................	58
Device information ............................................................................	58
Paper handling .................................................................................	58
Print quality .......................................................................................	59
Paper types ......................................................................................	59
System setup ....................................................................................	59
Service ..............................................................................................	59
Device polling ...................................................................................	60
Print settings .....................................................................................................	60
Printing .............................................................................................	60
PCL5e ...............................................................................................	60
PostScript .........................................................................................	60
Network settings ................................................................................................	60
Macintosh Configure Device (Mac OS X V10.3 and Mac OS X V10.4) .............................	61
Embedded Web server ......................................................................................................	62
Features ............................................................................................................	62
4 Theory of operation
Basic operation ...................................................................................................................................	64
Sequence of operation ......................................................................................................	65
Sequence of operation, HP LaserJet 3050 all-in-one scanner ..........................	65
Sequence of operation, HP LaserJet 3052/3055 all-in-one scanner .................	66
Sequence of operation, HP LaserJet 3050/3052/3055 all-in-one printer
(product base) ...................................................................................................	68
HP LaserJet 3050/3052/3055 all-in-one timing diagram—printer (product
base) .................................................................................................................	69
Formatter system ...............................................................................................................................	70
Central processing unit .....................................................................................................	70
Line interface unit (HP LaserJet 3050 all-in-one and HP LaserJet 3055 all-in-one
only) ...................................................................................................................................	70
Standard startup process ...................................................................................................	71
All-in-one startup messages .............................................................................	71
RAM ...................................................................................................................................	71
USB interface .....................................................................................................................	71
Control panel .....................................................................................................................	72
Economode .......................................................................................................................	72
MEt ....................................................................................................................................	72
Enhanced I/O .....................................................................................................................	72
PJL overview ....................................................................................................................	73

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Printer (product base) functions .........................................................................................................	74
Engine control system (engine control unit and power-supply assembly) .........................	75
Print-engine control system ...............................................................................	75
Printer (product base) laser/scanner .................................................................	76
Power system on the power-supply assembly ..................................................	77
Ac power distribution ........................................................................	77
Dc power distribution ........................................................................	77
Overcurrent/overvoltage ...................................................................	77
High-voltage power distribution ........................................................	78
Image-formation system ....................................................................................................	79
The seven image-formation processes ............................................................	79
Print cartridge ....................................................................................................................	80
Printer (product base) paper-feed system .........................................................................	80
Jam detection in the all-in-one ..........................................................................................	82
Conditions of jam detection ...............................................................................	82
HP LaserJet 3050 all-in-one unique components ..............................................................................	83
Basic operation ..................................................................................................................	83
ADF pickup-and-feed system ............................................................................	85
Optical scanning system ...................................................................................	87
HP LaserJet 3052/3055 all-in-one unique components .....................................................................	89
Scanner and ADF functions and operation ........................................................................	89
Scanner functions ............................................................................................	89
Scanner operation .............................................................................................	90
ADF operation ...................................................................................................	90
ADF paper path and ADF sensors ....................................................................	91
ADF jam detection .............................................................................................	91
Fax functions and operation (HP LaserJet 3050 all-in-one and HP LaserJet 3055 all-in-one
only) ....................................................................................................................................................	92
Computer and network security features ...........................................................................	92
PSTN operation .................................................................................................................	92
Distinctive ring function ......................................................................................................	93
Faxing with Voice over IP services ....................................................................................	94
The fax subsystem .............................................................................................................	94
Formatter in the fax subsystem .........................................................................................	94
LIU in the fax subsystem ...................................................................................................	95
Safety isolation ..................................................................................................	95
Safety-protection circuitry ..................................................................................	95
Data path ...........................................................................................................	96
Hook state .........................................................................................................	96
Downstream current detection ..........................................................................	96
Hook switch control ...........................................................................................	97
Ring detect ........................................................................................................	97
Line-current control ...........................................................................................	97
Billing- (metering-) tone filters ...........................................................................	97
Fax page storage in flash memory ....................................................................................	98
Stored fax pages ...............................................................................................	98
Advantages of flash-memory storage ..............................................................	98
5 Removal and replacement
Removal and replacement strategy ..................................................................................................	100

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Electrostatic discharge .....................................................................................................	100
Required tools ..................................................................................................................	101
Before performing service ................................................................................................	101
After performing service ...................................................................................................	101
Post-service tests ............................................................................................................	101
Test 1 (print-quality test) .................................................................................	101
Test 2 (copy-quality test) .................................................................................	102
Test 3 (fax-quality test) ....................................................................................	102
Parts removal order .........................................................................................................	103
HP LaserJet 3050 all-in-one .............................................................................................................	106
Link assemblies and scanner support-frame springs ......................................................	107
Scanner side covers ........................................................................................................	109
Separation-pad set ..........................................................................................................	111
Control-panel bezel ..........................................................................................................	112
Control-panel assembly ...................................................................................................	114
Media lever and media-lever torsion spring .....................................................................	115
Separation-pad assembly ................................................................................................	116
Scanner assembly ...........................................................................................................	118
Scanner assembly top cover ...........................................................................................	126
Top-cover assembly ........................................................................................................	129
Pickup roller .....................................................................................................................	130
White platen .....................................................................................................................	131
HP LaserJet 3052/3055 all-in-one ....................................................................................................	132
ADF input tray ..................................................................................................................	132
Flatbed lid ........................................................................................................................	133
Link assemblies and scanner support-frame springs ......................................................	136
Control-panel bezel ..........................................................................................................	138
Control-panel assembly ...................................................................................................	139
ADF separation pad .........................................................................................................	141
ADF input-tray flag ...........................................................................................................	142
ADF pickup roller and load-arm assembly (HP LaserJet 3052/3055 all-in-one) ..............	143
ADF scanner glass ..........................................................................................................	146
Scanner assembly ...........................................................................................................	148
Printer (product base) .......................................................................................................................	156
Printer separation pad .....................................................................................................	157
Print cartridge ..................................................................................................................	158
Printer pickup roller ..........................................................................................................	159
Installing the scanner cushions ........................................................................................	162
Media input tray ...............................................................................................................	163
Transfer roller ..................................................................................................................	165
Side covers ......................................................................................................................	167
Print-cartridge door ..........................................................................................................	169
Rear cover and fuser cover .............................................................................................	170
Front cover .......................................................................................................................	172
Speaker assembly ...........................................................................................................	174
Power supply ...................................................................................................................	175
Formatter and line interface unit (LIU) .............................................................................	178
Scanner support-frame ....................................................................................................	182
Engine controller unit (ECU) ............................................................................................	185
Laser/scanner assembly ..................................................................................................	189

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Main motor .......................................................................................................................	190
Fuser ................................................................................................................................	192
Paper-pickup assembly ...................................................................................................	194
6 Troubleshooting
Troubleshooting process ..................................................................................................................	196
Troubleshooting checklist ................................................................................................	196
Control-panel messages ..................................................................................................................	199
Alert and warning messages ..........................................................................................	199
Alert and warning message tables ..................................................................	199
Critical error messages ....................................................................................................	205
Critical error message-tables ..........................................................................	205
Event-log codes ...............................................................................................................	209
Jams .................................................................................................................................................	211
Causes of jams ................................................................................................................	211
Tips to avoid jams ...........................................................................................................	211
Where to look for jams .....................................................................................................	212
Print cartridge area ..........................................................................................................	212
Input trays ........................................................................................................................	214
Output bin ........................................................................................................................	215
Solving print paper-feed problems ...................................................................................	216
Paper-feed solutions, printing .........................................................................	216
Jams occur in the automatic document feeder (ADF) .....................................................	218
Solving ADF paper-feed problems ..................................................................................	221
Paper-feed solutions, scanning/copying .........................................................	221
Print image-quality problems ............................................................................................................	223
Checking the print cartridge ............................................................................................	223
To redistribute the toner in the print cartridge .................................................	223
Solving print image-quality problems ...............................................................................	224
Print image-quality solutions ...........................................................................	224
Scan/copy image-quality problems .................................................................................................	232
Scan/copy image-quality solutions ..................................................................................	232
ADF problems ..................................................................................................................................	239
Fax troubleshooting (HP LaserJet 3050/3055 all-in-one) .................................................................	240
General fax troubleshooting .............................................................................................	240
Fax receive troubleshooting .............................................................................................	242
Fax send troubleshooting ................................................................................................	244
DSL problems ..................................................................................................................	245
PABX line problems ........................................................................................	245
Control-panel-display problems ........................................................................................................	246
Functional checks .............................................................................................................................	247
Control-panel test ............................................................................................................	247
Half self-test functional check .........................................................................................	247
To perform a half self-test check .....................................................................	248
To perform other checks .................................................................................	248
Drum-rotation functional check .......................................................................................	248
High-voltage contacts check ............................................................................................	249
To check the print-cartridge contacts ............................................................	249
To check the high-voltage connector pins ......................................................	250
Service-mode functions ....................................................................................................................	251

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Secondary service menu .................................................................................................	251
To gain access to the secondary service menu ..............................................	251
To print a list of all the fax data-store parameters ...........................................	251
Developer’s menu ............................................................................................................	252
To gain access to the developer’s menu .........................................................	253
To adjust fax data-store parameters ...............................................................	253
To scroll quickly to a particular data-store parameter .....................................	253
Changing the country/region code parameters ................................................................	254
To change the country/region from one location to another ............................	254
To set the language and location if none is set ...............................................	254
Soft reset .........................................................................................................................	255
Performing a soft reset ....................................................................................	255
Super NVRAM init ............................................................................................................	255
To perform a super NVRAM init ......................................................................	255
NVRAM init .....................................................................................................................	256
To perform an NVRAM init ..............................................................................	256
System settings for localized products ............................................................................	257
Printer job language (PJL) software commands ..............................................................	258
Troubleshooting tools .......................................................................................................................	259
Printing a configuration report, demonstration page, or menu structure ..........................	259
Printing all fax reports at once (HP LaserJet 3050/3055 all-in-one) ................................	259
T.30 protocol trace (HP LaserJet 3050 all-in-one and HP LaserJet 3055 all-in-one only) 260
To print a T.30 protocol trace report ................................................................	260
Fax error-correction mode (ECM) (HP LaserJet 3050 all-in-one
and HP LaserJet 3055 all-in-one only) ...........................................	260
V.34 fax standard ............................................................................................	261
Fax receive and fax send codes .....................................................................	261
Translating the fax trace report (HP LaserJet 3050 all-in-one and
HP LaserJet 3055 all-in-one only) ...................................................................	270
Repetitive image defect ruler ..........................................................................................	278
Firmware updates and recovery .......................................................................................................	279
7 Parts and diagrams
Ordering parts and supplies .............................................................................................................	282
Parts that wear ................................................................................................................	282
Parts ................................................................................................................................	282
World-wide customer support ..........................................................................................	282
Accessories ......................................................................................................................................	283
Documentation .................................................................................................................	284
Common hardware .........................................................................................................	285
How to use the parts lists and diagrams ..........................................................................	285
Replacing the printer engine assembly ............................................................................	285
Diagrams ..........................................................................................................................................	288
Component locations, HP LaserJet 3050/3052/3055 all-in-one printer (product
base) ................................................................................................................................	288
Main wiring ......................................................................................................................	291
Formatter PCA and LIU connectors .................................................................................	295
HP LaserJet 3050 all-in-one scanner assembly ...............................................................................	298
ADF components, HP LaserJet 3050 all-in-one ..............................................................	300
Guide assembly, HP LaserJet 3050 all-in-one ................................................................	304

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HP LaserJet 3052/3055 all-in-one scanner assembly ......................................................................	306
Major assemblies, HP LaserJet 3052/3055 all-in-one .....................................................	308
Scanner components, HP LaserJet 3052/3055 all-in-one ...............................................	310
Printer (product base), HP LaserJet 3050/3052/3055 all-in-one ......................................................	314
External covers, printer (product base) ............................................................................	316
Formatter and LIU ............................................................................................................	318
Internal components, printer (product base) ....................................................................	320
Alphabetical parts list .......................................................................................................................	326
Numerical parts list ...........................................................................................................................	336
Appendix A All-in-one specifications
Physical specifications .....................................................................................................................	348
Electrical specifications ....................................................................................................................	348
Power consumption ..........................................................................................................................	349
Environmental specifications ............................................................................................................	349
Acoustic emissions ...........................................................................................................................	350
Appendix B Service and support
Hewlett-Packard limited warranty statement ....................................................................................	352
Print Cartridge Limited Warranty Statement .....................................................................................	353
Extended warranty ...........................................................................................................................	353
Appendix C Regulatory information
FCC compliance ...............................................................................................................................	356
Environmental Product Stewardship program ..................................................................................	357
Protecting the environment ..............................................................................................	357
Ozone production ............................................................................................................	357
Power consumption .........................................................................................................	357
Toner consumption .........................................................................................	357
Paper use ........................................................................................................	357
Plastics ............................................................................................................	357
HP LaserJet printing supplies ..........................................................................................	358
HP Printing Supplies Returns and Recycling Program Information ................	358
U.S. returns .....................................................................................................	358
Non-U.S. returns .............................................................................................	358
Paper ...............................................................................................................	358
Material restrictions .........................................................................................	359
Nederlands ......................................................................................................................	359
Taiwan .............................................................................................................................	360
Disposal of waste equipment by users in private household in the European Union ......	360
Material safety data sheet ................................................................................................	360
For more information .......................................................................................................	360
Telephone Consumer Protection Act (United States) ......................................................................	362
IC CS-03 requirements .....................................................................................................................	362
EU statement for telecom operation .................................................................................................	363
New Zealand telecom statements ....................................................................................................	363
Declaration of conformity (HP LaserJet 3390, 3392, 3055, and 3050) ............................................	364
Declaration of conformity (HP LaserJet 3052) .................................................................................	365
Country-/region-specific safety statements ......................................................................................	366

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Laser safety statement ....................................................................................................	366
Canadian DOC statement ................................................................................................	366
Korean EMI statement .....................................................................................................	366
Finnish laser statement ....................................................................................................	367
Index .................................................................................................................................................................	369

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List of tables

Table 1-1	Priority input slot specifications, HP LaserJet 3050/3052/3055 all-in-one .......................................			21
Table 1-2	Media input tray (tray 1) specifications, HP LaserJet 3050/3052/3055 all-in-one ............................			22
Table 1-3	ADF specifications, HP LaserJet 3050 all-in-one .............................................................................			22
Table 1-4	ADF specifications, HP LaserJet 3052/3055 all-in-one ....................................................................			22
Table 3-1	Life expectancies .............................................................................................................................			38
Table 4-1	HP LaserJet 3050 all-in-one basic sequence of operation ..............................................................			65
Table 4-2	HP LaserJet 3052/3055 all-in-one basic sequence of operation .....................................................			66
Table 4-3	HP LaserJet 3050/3052/3055 all-in-one basic sequence	of operation—printer	(product
base) ...................................................................................................................................................................				68
Table 4-4	All-in-one startup messages .............................................................................................................			71
Table 4-5	Dc power distribution ........................................................................................................................			77
Table 6-1	Alert and warning messages .........................................................................................................			199
Table 6-2	Critical error messages ..................................................................................................................			205
Table 6-3	Event-log codes .............................................................................................................................			209
Table 6-4	General fax troubleshooting ...........................................................................................................			241
Table 6-5	System settings ..............................................................................................................................			257
Table 6-6	Fax receive codes ..........................................................................................................................			261
Table 6-7	Fax send codes ..............................................................................................................................			264
Table 6-8	Fax phase sequence (HP LaserJet 3050 all-in-one and HP LaserJet 3055 all-in-one only) .........			270
Table 6-9	Appropriate responses (HP LaserJet 3050 all-in-one and	HP LaserJet 3055	all-in-one
only) ..................................................................................................................................................................				271
Table 6-10	Fax abbreviations (HP LaserJet 3050 all-in-one and HP LaserJet 3055 all-in-one only) ............			273
Table 7-1	Technical support Websites and related documentation ...............................................................			282
Table 7-2	Accessories ....................................................................................................................................			283
Table 7-3	Documentation ...............................................................................................................................			284
Table 7-4	Common fasteners ........................................................................................................................			285
Table 7-5	Replacing the printer engine assembly .........................................................................................			286
Table 7-6	Formatter connections, HP LaserJet 3050 all-in-one .....................................................................			295
Table 7-7	Formatter connections, HP LaserJet 3052/3055 all-in-one ............................................................			296
Table 7-8	LIU connections, HP LaserJet 3050/3055 all-in-one ......................................................................			297
Table 7-9	Scanner assembly, HP LaserJet 3050 all-in-one ...........................................................................			299
Table 7-10	ADF components, HP LaserJet 3050 all-in-one ...........................................................................			301
Table 7-11	Guide assembly, HP LaserJet 3050 all-in-one .............................................................................			305
Table 7-12	Scanner assembly, HP LaserJet 3052/3055 all-in-one ................................................................			307
Table 7-13	Major assemblies, HP LaserJet 3052/3055 all-in-one .................................................................			309
Table 7-14	Scanner components, HP LaserJet 3052/3055 all-in-one ...........................................................			311
Table 7-15	Printer (product base), HP LaserJet 3050/3052/3055 all-in-one ..................................................			315
Table 7-16	External covers, printer (product base) ........................................................................................			317
Table 7-17	Formatter and LIU ........................................................................................................................			319
Table 7-18	Internal components, printer (product base) (1 of 3) ....................................................................			321

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Table 7-19 Internal components, printer (product base) (2 of 3) ....................................................................		323
Table 7-20 Internal components, printer (product base) (3 of 3) ....................................................................		325
Table 7-21 Alphabetical parts list ...................................................................................................................		326
Table 7-22 Numerical parts list .......................................................................................................................		336
Table A-1	Physical specifications ...................................................................................................................	348
Table A-2	Electrical specifications ..................................................................................................................	348
Table A-3 Power consumption (average, in watts) .......................................................................................		349
Table A-4	Environmental specifications ........................................................................................................	349
Table A-5 Acoustic emissions (HP LaserJet 3050 all-in-one) ........................................................................		350
Table A-6	Acoustic emissions (HP LaserJet 3052/3055 all-in-one) ...............................................................	350

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List of figures

Figure 1-1 HP LaserJet 3050/3052/3055 all-in-one identification label ............................................................		11
Figure 2-1 HP LaserJet 3050 all-in-one dimensions ........................................................................................		26
Figure 2-2 HP LaserJet 3052/3055 all-in-one dimensions ...............................................................................		26
Figure 2-3 HP LaserJet 3050 all-in-one box contents ......................................................................................		28
Figure 2-4 HP LaserJet 3052/3055 all-in-one box contents .............................................................................		29
Figure 3-1 Sample configuration page .............................................................................................................		51
Figure 4-1	All-in-one configuration ...................................................................................................................	65
Figure 4-2 HP LaserJet 3050/3052/3055 all-in-one timing diagram—printer (product base) ...........................		69
Figure 4-3 Printer (product base) functional block diagram .............................................................................		74
Figure 4-4	Laser/scanner operation .................................................................................................................	76
Figure 4-5 High-voltage power supply circuit ...................................................................................................		78
Figure 4-6 Image-formation block diagram ......................................................................................................		79
Figure 4-7 Printer (product base) paper path ...................................................................................................		81
Figure 4-8 Basic operation block diagram ........................................................................................................		83
Figure 4-9 HP LaserJet 3050 all-in-one optical and feed systems ...................................................................		84
Figure 4-10 HP LaserJet 3050 all-in-one feed control (1 of 2) .........................................................................		85
Figure 4-11 HP LaserJet 3050 all-in-one feed control (2 of 2) .........................................................................		86
Figure 4-12 HP LaserJet 3050 all-in-one optical system (1 of 2) .....................................................................		87
Figure 4-13 HP LaserJet 3050 all-in-one optical system (2 of 2) .....................................................................		88
Figure 4-14 HP LaserJet 3052/3055 all-in-one optical system ........................................................................		89
Figure 4-15 HP LaserJet 3052/3055 all-in-one ADF path ................................................................................		91
Figure 5-1 HP LaserJet 3050/3052/3055 all-in-one .......................................................................................		103
Figure 5-2 Parts removal order for the HP LaserJet 3050 all-in-one .............................................................		104
Figure 5-3 Parts removal order for the HP LaserJet 3052/3055 all-in-one ....................................................		104
Figure 5-4 Parts removal order for the printer (product base, all models) .....................................................		105
Figure 5-5 Parts removal order, HP LaserJet 3050 all-in-one scanner assembly ..........................................		106
Figure 5-6 Removing the link assemblies and scanner support-frame springs (1 of 4) .................................		107
Figure 5-7 Removing the link assemblies and scanner support-frame springs (2 of 4) .................................		107
Figure 5-8 Removing the link assemblies and scanner support-frame springs (3 of 4) .................................		108
Figure 5-9 Removing the link assemblies and scanner support-frame springs (4 of 4) .................................		108
Figure 5-10 Removing the scanner side covers (1 of 2) ................................................................................		109
Figure 5-11 Removing the scanner side covers (2 of 2) ................................................................................		110
Figure 5-12 Removing the separation pad .....................................................................................................		111
Figure 5-13 Removing the control-panel bezel (1 of 3) ..................................................................................		112
Figure 5-14 Removing the control-panel bezel (2 of 3) ..................................................................................		112
Figure 5-15 Removing the control-panel bezel (3 of 3) ..................................................................................		113
Figure 5-16 Removing the control-panel assembly (1 of 2) ...........................................................................		114
Figure 5-17 Removing the control-panel assembly (2 of 2) ...........................................................................		114
Figure 5-18 Removing the media lever and media-lever torsion spring .........................................................		115
Figure 5-19 Removing the separation-pad assembly (1 of 3) ........................................................................		116

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Figure 5-20 Removing the separation-pad assembly (2 of 3) ........................................................................	117
Figure 5-21 Removing the separation-pad assembly (3 of 3) ........................................................................	117
Figure 5-22 Removing the scanner assembly (1 of 14) .................................................................................	118
Figure 5-23 Removing the scanner assembly (2 of 14) .................................................................................	118
Figure 5-24 Removing the scanner assembly (3 of 14) .................................................................................	119
Figure 5-25 Removing the scanner assembly (4 of 14) .................................................................................	119
Figure 5-26 Removing the scanner assembly (5 of 14) .................................................................................	120
Figure 5-27 Removing the scanner assembly (6 of 14) .................................................................................	120
Figure 5-28 Removing the scanner assembly (7 of 14) .................................................................................	121
Figure 5-29 Removing the scanner assembly (8 of 14) .................................................................................	121
Figure 5-30 Removing the scanner assembly (9 of 14) .................................................................................	122
Figure 5-31 Removing the scanner assembly (10 of 14) ...............................................................................	122
Figure 5-32 Removing the scanner assembly (11 of 14) ...............................................................................	123
Figure 5-33 Removing the scanner assembly (12 of 14) ...............................................................................	124
Figure 5-34 Removing the scanner assembly (13 of 14) ...............................................................................	125
Figure 5-35 Removing the scanner assembly (14 of 14) ...............................................................................	125
Figure 5-36 Removing the scanner assembly top cover (1 of 4) ...................................................................	126
Figure 5-37 Removing the scanner assembly top cover (2 of 4) ...................................................................	127
Figure 5-38 Removing the scanner assembly top cover (3 of 4) ...................................................................	128
Figure 5-39 Removing the scanner assembly top cover (4 of 4) ...................................................................	128
Figure 5-40 Removing the top-cover assembly (1 of 2) .................................................................................	129
Figure 5-41 Removing the top-cover assembly (2 of 2) .................................................................................	129
Figure 5-42 Removing the pickup roller (1 of 2) .............................................................................................	130
Figure 5-43 Removing the pickup roller (2 of 2) .............................................................................................	130
Figure 5-44 Removing the white platen (1 of 2) .............................................................................................	131
Figure 5-45 Removing the white platen (2 of 2) .............................................................................................	131
Figure 5-46 Parts removal order, HP LaserJet 3052/3055 all-in-one scanner assembly ...............................	132
Figure 5-47 Removing the ADF input tray ......................................................................................................	132
Figure 5-48 Removing the flatbed lid (1 of 5) .................................................................................................	133
Figure 5-49 ADF cover correctly installed ......................................................................................................	133
Figure 5-50 Removing the flatbed lid (2 of 5) .................................................................................................	134
Figure 5-51 Removing the flatbed lid (3 of 5) .................................................................................................	134
Figure 5-52 Removing the flatbed lid (4 of 5) .................................................................................................	135
Figure 5-53 Removing the flatbed lid (5 of 5) .................................................................................................	135
Figure 5-54 Removing the link assemblies and scanner support-frame springs (1 of 4) ...............................	136
Figure 5-55 Removing the link assemblies and scanner support-frame springs (2 of 4) ...............................	136
Figure 5-56 Removing the link assemblies and scanner support-frame springs (3 of 4) ...............................	137
Figure 5-57 Removing the link assemblies and scanner support-frame springs (4 of 4) ...............................	137
Figure 5-58 Removing the control-panel bezel ..............................................................................................	138
Figure 5-59 Removing the control-panel assembly (1 of 2) ...........................................................................	139
Figure 5-60 Removing the control-panel assembly (2 of 2) ...........................................................................	140
Figure 5-61 Removing the ADF separation pad .............................................................................................	141
Figure 5-62 Removing the ADF input-tray flag ...............................................................................................	142
Figure 5-63 Replacing the ADF pickup roller and load-arm assembly (1 of 6) ..............................................	143
Figure 5-64 Replacing the ADF pickup roller and load-arm assembly (2 of 6) ..............................................	143
Figure 5-65 Replacing the ADF pickup roller and load-arm assembly (3 of 6) ..............................................	144
Figure 5-66 Replacing the ADF pickup roller and load-arm assembly (4 of 6) ..............................................	144
Figure 5-67 Replacing the ADF pickup roller and load-arm assembly (5 of 6) ..............................................	145
Figure 5-68 Replacing the ADF pickup roller and load-arm assembly (6 of 6) ..............................................	145
Figure 5-69 Removing the ADF scanner glass (1 of 3) ..................................................................................	146

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Figure 5-70 Removing the ADF scanner glass (2 of 3) ..................................................................................	146
Figure 5-71 Removing the ADF scanner glass (3 of 3) ..................................................................................	147
Figure 5-72 Removing the scanner assembly (1 of 13) .................................................................................	148
Figure 5-73 Removing the scanner assembly (2 of 13) .................................................................................	148
Figure 5-74 Removing the scanner assembly (3 of 13) .................................................................................	149
Figure 5-75 Removing the scanner assembly (4 of 13) .................................................................................	149
Figure 5-76 Removing the scanner assembly (5 of 13) .................................................................................	150
Figure 5-77 Removing the scanner assembly (6 of 13) .................................................................................	150
Figure 5-78 Removing the scanner assembly (7 of 13) .................................................................................	151
Figure 5-79 Removing the scanner assembly (8 of 13) .................................................................................	151
Figure 5-80 Removing the scanner assembly (9 of 13) .................................................................................	152
Figure 5-81 Removing the scanner assembly (10 of 13) ...............................................................................	153
Figure 5-82 Removing the scanner assembly (11 of 13) ...............................................................................	154
Figure 5-83 Removing the scanner assembly (12 of 13) ...............................................................................	154
Figure 5-84 Removing the scanner assembly (13 of 13) ...............................................................................	155
Figure 5-85 Parts removal order for the printer (product base, all models) ...................................................	156
Figure 5-86 Removing the printer separation pad (1 of 2) .............................................................................	157
Figure 5-87 Removing the printer separation pad (2 of 2) .............................................................................	157
Figure 5-88 Removing the print cartridge (1 of 2) ..........................................................................................	158
Figure 5-89 Removing the print cartridge (2 of 2) ..........................................................................................	158
Figure 5-90 Removing the printer pickup roller (1 of 5) ..................................................................................	159
Figure 5-91 Removing the printer pickup roller (2 of 5) ..................................................................................	159
Figure 5-92 Removing the printer pickup roller (3 of 5) ..................................................................................	160
Figure 5-93 Removing the printer pickup roller (4 of 5) ..................................................................................	160
Figure 5-94 Removing the printer pickup roller (5 of 5) ..................................................................................	161
Figure 5-95 Installing the scanner cushions ...................................................................................................	162
Figure 5-96 Removing the media input tray (1 of 3) .......................................................................................	163
Figure 5-97 Removing the media input tray (2 of 3) .......................................................................................	163
Figure 5-98 Removing the media input tray (3 of 3) .......................................................................................	164
Figure 5-99 Removing the transfer roller (1 of 3) ...........................................................................................	165
Figure 5-100 Removing the transfer roller (2 of 3) .........................................................................................	166
Figure 5-101 Removing the transfer roller (3 of 3) .........................................................................................	166
Figure 5-102 Removing the side covers (1 of 4) ............................................................................................	167
Figure 5-103 Removing the side covers (2 of 4) ............................................................................................	167
Figure 5-104 Removing the side covers (3 of 4) ............................................................................................	168
Figure 5-105 Removing the side covers (4 of 4) ............................................................................................	168
Figure 5-106 Removing the print-cartridge door (1 of 2) ................................................................................	169
Figure 5-107 Removing the print-cartridge door (2 of 2) ................................................................................	169
Figure 5-108 Removing the rear cover and fuser cover (1 of 3) ....................................................................	170
Figure 5-109 Removing the rear cover and fuser cover (2 of 3) ....................................................................	170
Figure 5-110 Removing the rear cover and fuser cover (3 of 3) ....................................................................	171
Figure 5-111 Removing the front cover (1 of 3) .............................................................................................	172
Figure 5-112 Removing the front cover (2 of 3) .............................................................................................	172
Figure 5-113 Removing the front cover (3 of 3) .............................................................................................	173
Figure 5-114 Removing the speaker assembly (1 of 2) .................................................................................	174
Figure 5-115 Removing the speaker assembly (2 of 2) .................................................................................	174
Figure 5-116 Removing the power supply (1 of 5) .........................................................................................	175
Figure 5-117 Removing the power supply (2 of 5) .........................................................................................	175
Figure 5-118 Removing the power supply (3 of 5) .........................................................................................	176
Figure 5-119 Removing the power supply (4 of 5) .........................................................................................	176

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Figure 5-120 Removing the power supply (5 of 5) .........................................................................................		177
Figure 5-121 Removing the formatter (1 of 3) ................................................................................................		178
Figure 5-122 HP LaserJet 3050 all-in-one formatter and LIU ........................................................................		179
Figure 5-123 HP LaserJet 3052 all-in-one formatter ......................................................................................		179
Figure 5-124 HP LaserJet 3055 all-in-one formatter and LIU ........................................................................		180
Figure 5-125 Removing the formatter (2 of 3) ................................................................................................		180
Figure 5-126 Removing the formatter (3 of 3) ................................................................................................		181
Figure 5-127 Removing the scanner support-frame (1 of 4) ..........................................................................		182
Figure 5-128 Removing the scanner support-frame (2 of 4) ..........................................................................		183
Figure 5-129 Removing the scanner support-frame (3 of 4) ..........................................................................		183
Figure 5-130 Removing the scanner support-frame (4 of 4) ..........................................................................		184
Figure 5-131 Removing the ECU (1 of 6) .......................................................................................................		185
Figure 5-132 Removing the ECU (2 of 6) .......................................................................................................		186
Figure 5-133 Removing the ECU (3 of 6) .......................................................................................................		186
Figure 5-134 Removing the ECU (4 of 6) .......................................................................................................		187
Figure 5-135 Removing the ECU (5 of 6) .......................................................................................................		187
Figure 5-136 Removing the ECU (6 of 6) .......................................................................................................		188
Figure 5-137 Removing the laser/scanner assembly .....................................................................................		189
Figure 5-138 Removing the main motor (1 of 2) ............................................................................................		190
Figure 5-139 Removing the main motor (2 of 2) ............................................................................................		191
Figure 5-140 Removing the fuser assembly (1 of 2) ......................................................................................		192
Figure 5-141 Removing the fuser assembly (2 of 2) ......................................................................................		193
Figure 5-142 Removing the paper-pickup assembly ......................................................................................		194
Figure 6-1 Print-cartridge high-voltage contacts ............................................................................................		249
Figure 6-2	High-voltage contacts ...................................................................................................................	250
Figure 6-3 Example of a T.30 trace of a successfully sent fax .......................................................................		276
Figure 6-4 Example of a T.30 trace of a successfully received fax ................................................................		277
Figure 6-5 Repetitive image defect ruler ........................................................................................................		278
Figure 7-1	Major components ........................................................................................................................	288
Figure 7-2 Solenoid, sensors, switches, and motor .......................................................................................		289
Figure 7-3	PCBs .............................................................................................................................................	290
Figure 7-4 Main wiring, HP LaserJet 3050 all-in-one scanner assembly .......................................................		291
Figure 7-5 Main wiring, HP LaserJet 3050 all-in-one printer (product base) ..................................................		292
Figure 7-6 Main wiring, HP LaserJet 3052/3055 all-in-one scanner assembly ..............................................		293
Figure 7-7 Main wiring, HP LaserJet 3050/3052/3055 all-in-one printer (product base) ................................		294
Figure 7-8 Formatter connections, HP LaserJet 3050 all-in-one ...................................................................		295
Figure 7-9 Formatter connections, HP LaserJet 3052/3055 all-in-one ..........................................................		296
Figure 7-10 LIU connections, HP LaserJet 3050/3055 all-in-one ..................................................................		297
Figure 7-11 Scanner assembly, HP LaserJet 3050 all-in-one ........................................................................		298
Figure 7-12 ADF components, HP LaserJet 3050 all-in-one .........................................................................		300
Figure 7-13 Guide assembly, HP LaserJet 3050 all-in-one ...........................................................................		304
Figure 7-14 Scanner assembly, HP LaserJet 3052/3055 all-in-one ...............................................................		306
Figure 7-15 Major assemblies, HP LaserJet 3052/3055 all-in-one ................................................................		308
Figure 7-16 Scanner components, HP LaserJet 3052/3055 all-in-one ..........................................................		310
Figure 7-17 Printer (product base), HP LaserJet 3050/3052/3055 all-in-one ................................................		314
Figure 7-18 External covers, printer (product base) .......................................................................................		316
Figure 7-19 Formatter and LIU .......................................................................................................................		318
Figure 7-20 Internal components, printer (product base) (1 of 3) ..................................................................		320
Figure 7-21 Internal components, printer (product base) (2 of 3) ..................................................................		322
Figure 7-22 Internal components, printer (product base) (3 of 3) ..................................................................		324

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1 Product information

●All-in-one configurations

●All-in-one features

●All-in-one parts

●Software installation

●Choosing paper and other print media

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All-in-one configurations

The all-in-one is available in the following configurations.

HP LaserJet 3050 all-in-one

HP LaserJet 3050 all-in-one printer, fax, copier, scanner
●	Prints letter-size pages at speeds up to 19 pages per
	minute (ppm) and A4-size pages at speeds up to 18 ppm
●	PCL 5e and PCL 6 printer drivers and HP postscript level
	3 emulation.
●	The priority input slot holds up to 10 pages.
●	Tray 1 holds up to 250 sheets of print media or 10
	envelopes.
●	Average yield for the standard black print cartridge is
	2,000 pages in accordance with ISO/IEC 19752; actual
	yield depends on specific use.
●	Hi-Speed universal serial bus (USB) 2.0 port
●	V.34 fax modem and 2-megabyte (MB) flash fax-storage
	memory
●	64-MB random-access memory (RAM)
●	30-page automatic document feeder (ADF)

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HP LaserJet 3052/3055 all-in-one

HP LaserJet 3052 all-in-one printer, scanner, copier
●	Prints letter-size pages at speeds up to 19 ppm and A4-
	size pages at speeds up to 18 ppm
●	PCL 5e and PCL 6 printer drivers and HP postscript level
	3 emulation
●	The priority input slot holds up to 10 pages.
●	Tray 1 holds up to 250 sheets of print media or 10
	envelopes.
●	Average yield for the standard black print cartridge is
	2,000 pages in accordance with ISO/IEC 19752; actual
	yield depends on specific use.
●	Hi-Speed USB 2.0 port and port for connecting to a
	10/100Base-T network
●	64-MB RAM
●	50-page automatic document feeder (ADF)

The HP LaserJet scanner has all of one, plus:

3055 all-in-one printer, fax, copier, the features of the HP LaserJet 3052 all-in-

●V.34 fax modem and 2-MB flash fax-storage memory

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All-in-one configurations

3

All-in-one features

Excellent print quality	●	1200 dots per inch (dpi) with Image REt 2400 text and graphics
	● Adjustable settings to optimize print quality
	● The HP UltraPrecise print cartridge has a finer toner formulation that provides sharper text
		and graphics.
Fax (HP LaserJet 3050 all-	●	Full-functionality fax capabilities with a V.34 fax; includes a phone book, fax polling, and
in-one and HP LaserJet		delayed-fax features
3055 all-in-one only)	For more information, see the online user guide.
Copy	●	Includes an ADF that accommodates faster, more efficient copy jobs with multiple-page
		documents
	For more information, see the online user guide.
Scan	●	The HP LaserJet 3050 all-in-one provides 600 pixels per inch (ppi), 24-bit full-color
		scanning from the contact image sensor through the ADF.
	● The HP LaserJet 3052/3055 all-in-one provides 1200 ppi, 24-bit full-color scanning from
		letter/A4-size scanner glass.
	● All models include an ADF that allows faster, more efficient scan jobs with multiple-page
		documents.
	For more information, see the online user guide.
Networking (HP LaserJet	●	TCP/IP
3052/3055 all-in-one only)	●	LPD
	●	9100
Printer-driver features	●	Fast printing performance, built-in Intellifont and TrueType scaling technologies, and
		advanced imaging capabilities are benefits of the PCL 6 printer language.
Automatic language-	●	The all-in-one automatically determines and switches to the appropriate printer language
switching		(such as PS or PCL 6) for the print job.
Interface connections	●	Hi-Speed USB 2.0 port
	● 10/100 ethernet (RJ45) network port (HP LaserJet 3052/3055 all-in-one only)
Environmental features	●	PowerSave mode (HP LaserJet 3052/3055 all-in-one only)
	●	ENERGY STAR® qualified
Economical printing	●	N-up printing (printing more than one page on a sheet). For more information, see the
		online user guide.
	● The Economode setting uses less toner.
Supplies	●	No-shake cartridge design
Accessibility	●	The 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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All-in-one parts

Before using the all-in-one, familiarize yourself with its parts.

HP LaserJet 3050 all-in-one parts

Front view

	4	5
		6
	3
		7
	2
		8
	1

1Tray 1

2Priority input slot

3Output bin

4ADF output bin

5ADF input tray

6ADF media lever

7Control panel

8Cartridge-door release

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Back view

10	11
9	12

9 Interface ports

10 Security-lock slot

11 Power switch

12 Power receptacle

Interface ports

1

2

1 Hi-Speed USB 2.0 port

2 Fax ports

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Control panel

1

2

3

4

5

1Fax controls. Use the fax controls to change commonly used fax settings. For information about using the fax controls, see the online user guide.

2Alphanumeric buttons. Use the alphanumeric buttons to type data into the all-in-one control-panel display and dial telephone numbers for faxing. For information about using alphanumeric key characters, see the online user guide.

3Menu and cancel controls. Use these controls to select menu options, determine the all-in-one status, and cancel the current job.

4Copy controls. Use these controls to change commonly used default settings and to start copying. For information about copying, see the online user guide.

5Scan controls. Use these controls to scan to e-mail or to a folder. For information about scanning, see the online user guide.

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HP LaserJet 3052/3055 all-in-one parts

Front view

		4
		5
	3	6
	2
	1	7

1Media input tray (tray 1)

2Priority input slot

3Output bin

4Automatic document feeder (ADF) input tray

5ADF output bin

6Control panel

NOTE The control panel for the HP LaserJet 3055 all-in-one, with fax controls, is shown. The control panel for the HP LaserJet 3052 all-in-one does not have fax controls.

7 Cartridge-door release

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Back view

9

10

8

11

8Interface ports

9Security-lock slot

10Power switch

11Power receptacle

Interface ports

The HP LaserJet 3052/3055 all-in-one has two interface ports: a 10/100Base-T (RJ-45) network port and a Hi-Speed USB 2.0 port. The HP LaserJet 3055 all-in-one also has fax ports.

1

2

3

1 Network port

2 Hi-Speed USB 2.0 port

3 Fax ports (HP LaserJet 3055 all-in-one only)

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All-in-one parts

9

Control panel

1

2

3

4

5

1Fax controls (HP LaserJet 3055 all-in-one only; the HP LaserJet 3052 all-in-one does not have fax controls). Use the fax controls to change commonly used fax settings. For information about using the fax controls, see the online user guide.

2Alphanumeric buttons. Use the alphanumeric buttons to type data into the all-in-one control-panel display and dial telephone numbers for faxing. For information about using alphanumeric key characters, see the online user guide.

3Menu and cancel controls. Use these controls to select menu options, determine the all-in-one status, and cancel the current job.

4Copy controls. Use these controls to change commonly used default settings and to start copying. For instructions about copying, see the online user guide.

5Scan controls. Use these controls to scan to e-mail or to a folder. For instructions about scanning, see the online user guide.

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