Service Manual Info

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HP LaserJet 4200 4300

Tags : HPLaserJet42004300Q2425A4200NQ2426A4200TNQ2427A4200DTNQ2428A4200DTNSQ2446A4200DTNSLQ2447AQ2431A4300NQ2432A4300TNQ2433A4300DTNQ2434A4300DTNSQ2435A4300DTNSLQ2448AQ2431-90912 
HP LaserJet 4200 4300 Manuel de service

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Description

HP LaserJet 4200-4300 Service Manual
Publication number: Q2431-90912
Edition 1, 08 2002

HP LaserJet 4200 Q2425A
HP LaserJet 4200N Q2426A
HP LaserJet 4200TN Q2427A
HP LaserJet 4200DTN Q2428A 
HP LaserJet 4200DTNS Q2446A
HP LaserJet 4200DTNSL  Q2447A

HP LaserJet 4300 Q2431A
HP LaserJet 4300N Q2432A
HP LaserJet 4300TN  Q2433A
HP LaserJet 4300DTN Q2434A
HP LaserJet 4300DTNS Q2435A
HP LaserJet 4300DTNSL Q2448A 

List of tables
1 Printer description
Printer configurations 3
Model and serial numbers. 4
Site requirements . 5
Printer specifications . 5
Environmental specifications 7
Paper specifications . 9
Supported sizes and weights of media . 10
Supported types of media . 14
Labels 16
Overhead transparencies . 16
Envelopes . 17
Card stock and heavy paper . 18
Types of print media to avoid 19
Safety information . 20
Print cartridge and toner safety . 20
Laser safety 20
Laser safety statement (U.S.) 20
EMI statement (Korea) . 21
VCCI statement (Japan) 21
Laser statement (Finland) . 22
Regulatory information 23
FCC regulations. 23
Environmental product stewardship program 24
HP Printing Supplies Returns and Recycling program information 25
Declarations of Conformity . 26
Declaration of Conformity . 26
Canadian DOC regulations 26
2 Service approach
Service approach 28
Parts and supplies28
Ordering information . 28
Related documentation and software 28
Support . 28
Print-cartridge information 31
Hewlett-Packard limited warranty statement32
Limited warranty for toner cartridge life . 33
3 Printer operation
Using the control panel . .36
Control-panel layout .36
Control-panel lights.36
Control-panel buttons .37
Using the printer Help system . .37
Settings and defaults .38
Setting the control-panel display language.38
Control-panel menus . .39
Overview.39
Printing and changing control-panel menus . .39
Retrieve Job menu . .41
Information menu . .41
Paper Handling menu.42
Configure Device menu .44
4 Printer maintenance
Cleaning the printer and accessories .54
Cleaning the fuser .55
Running the cleaning page manually .56
Running the cleaning page automatically. .57
Cleaning spilled toner . .57
Performing preventative maintenance .58
Resetting the maintenance-kit counter . .58
Expected life of components .59
Maintaining the stapler unit .60
Removing and replacing the stapler unit . .60
Loading staples .62
Downloading a remote firmware update .63
5 Theory of operation
Introduction .67
Basic operation of the printer .67
General descriptions . .69
DC controller PCA .69
Power supply .71
Laser/scanner assembly.76
Paper pickup system . .78
Paper pickup and feed block .79
Printing from tray 1 . .80
Printing from tray 2 . .82
Media skew prevention. .85
Fixing/delivery block . .86
Printer jam detection. .87
Printing from the 500-sheet feeder .90
Printing from the 1,500-sheet feeder .92
Envelope feeder .95
Envelope feeder jam detection . .97
Duplexer .98
Duplexer jam detection . .100
Stacker and stapler/stacker . .101
Stacker .103
Stacker jam detection . .105
Stapler/stacker .106
Stapler/stacker jam detection . .117
Image-formation system 118
Electrostatic latent-image formation 120
Formatter system . 127
PowerSave 127
Resolution Enhancement technology 127
EconoMode 128
Input/output . 128
Printer memory 129
PJL overview . 130
PML . 130
Control panel . 130
6 Removing and replacing parts
Removal and replacement strategy . 133
Required tools . 133
Before performing service . 133
After completing service . 133
Screws used in the printer . 134
Parts-removal tree135
Printer input tray, and cabinet wheel locks . 136
User-replaceable parts . 137
Print cartridge . 137
Transfer roller . 138
Tray 1 pickup roller . 139
Tray 1 separation pad . 140
Tray 2 feed rollers 141
Covers, tray 1, and the rear output bin . 143
Accessory covers and the tray 2 extension door. 143
Formatter cover 145
Top cover 146
Right-side cover149
Left-side cover . 151
Tray 1 . 152
Rear output bin 155
Control-panel display 156
Control-panel overlay . 156
Control-panel assembly157
Internal components . 160
Firmware DIMM160
Formatter assembly 161
Fuser 162
Output delivery assembly 163
Duplexing pendulum assembly 165
Tray 2 media-size sensor 167
Main cooling fan (left side)168
Cooling fan (right side; HP LaserJet 4300 series printer only) 170
Laser/scanner assembly . 173
Print-cartridge motor (HP LaserJet 4300 series printer only) . 175
Main motor177
Tray 2 lifter-drive assembly . 179
DC controller PCA 181
Paper-pickup assembly, .183
Main drive assembly.186
Power supply . .188
Paper-feed belt assembly.191
Tray 1 paper-pickup assembly . .192
Paper feed assembly . .195
Registration assembly .198
Transfer assembly . .200
Accessories . .204
500-sheet feeder assembly .204
1,500-sheet feeder assembly . .214
7 Troubleshooting
Introduction . .230
Troubleshooting process . .231
Initial troubleshooting checklist.232
Troubleshooting flowchart . .234
Power-on checks .236
Troubleshooting tools.239
Information pages.239
Embedded Web server . .243
Gaining access to the embedded Web server .243
Printer Status and Alerts software . .245
Control-panel menus .247
Using control-panel menus. .247
Resets submenu. .247
Diagnostics menu .248
Service menu (service PIN codes) . .249
Printer resets and power-on modes . .251
Cold reset . .251
NVRAM initialization . .251
Hard-disk initialization .252
Power-on bypass .252
Test pages . .254
Engine test page. .254
Formatter test page .254
Interface troubleshooting . .255
Communications checks. .255
EIO troubleshooting .255
Display-message troubleshooting .257
Status messages .257
Warning messages .257
Error messages . .257
Critical-error messages . .257
Alphabetical printer messages . .258
Numerical printer messages . .274
Paper-path troubleshooting . .295
Overview. .295
Paper-jam recovery .296
Avoiding paper jams . .297
Persistent jams . .298
Media transport problems .304
Multiple pages feed .304
Paper is wrinkled or folded . .304
Paper is skewed .305
Image-formation troubleshooting . 306
Print quality problems associated with media . 306
Overhead transparency defects . 307
Print quality problems associated with the environment . 307
Print quality problems associated with jams 307
Image defects . 308
Image defect tables . 311
Repetitive defects troubleshooting . 325
Troubleshooting the stacker and the stapler/stacker 326
Overview . 326
Initial checks 326
Jam errors 327
Paper transport errors . 330
Malfunction errors 330
Component errors 331
Printer component locations . 332
Main printer parts. 332
Printer switches and sensors336
Printer motors and fans 337
Printer PCAs 338
Accessory component locations 339
500-sheet feeder main parts 339
500-sheet feeder switches, sensors, solenoids, and PCAs. 340
1,500-sheet feeder main parts. 341
1,500-sheet feeder switches, sensors, solenoids, and PCAs . 343
Stapler/stacker stapler assembly. 344
Stacker and stapler/stacker switches and sensors . 345
Stacker and stapler/stacker motors and solenoids . 346
Stacker and stapler/stacker PCAs347
Printer and accessory wiring diagrams . 348
DC controller block diagram 356
General timing diagrams 357
8 Parts and diagrams
Ordering parts, supplies, and getting support 362
Ordering information 362
Related documentation and software . 362
Support 362
Accessories and supplies . 364
How to use the parts lists and diagrams 367
Parts diagrams and lists 368
Alphabetical parts list405
Numerical parts list . 409



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