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惠普HP Laserjet 2400系列打印机维修手册英文版

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惠普HP Laserjet 2400系列打印机维修手册英文版

Table of contents
1 Product Information
Chapter contents........................................................................................................................1
Printer configurations.................................................................................................................2
HP LaserJet 2400 Series printer base models....................................................................2
Features.....................................................................................................................................4
Specifications.............................................................................................................................8
Physical specifications ........................................................................................................8
Electrical specifications ......................................................................................................9
Acoustic emissions ...........................................................................................................10
Operating environment .....................................................................................................10
Media specifications ................................................................................................................11
Supported types and sizes of print media ........................................................................11
Paper and print media.......................................................................................................12
Printing and paper storage environment...........................................................................13
Envelopes..........................................................................................................................14
Envelopes with double side seams ..................................................................................14
Envelopes with adhesive strips or flaps............................................................................14
Envelope margins..............................................................................................................15
Envelope storage ..............................................................................................................15
Labels................................................................................................................................15
Transparencies .................................................................................................................15
Hewlett-Packard limited warranty statement ..........................................................................16
Print Cartridge Limited Warranty Statement ...........................................................................17
HP LaserJet printing supplies .................................................................................................18
Declaration of conformity ........................................................................................................19
Country-/region-specific safety statements .............................................................................20
Laser safety statement .....................................................................................................20
Canadian DOC statement ................................................................................................20
Japanese VCCI statement ................................................................................................20
Korean EMI statement ......................................................................................................20
Finnish laser statement ....................................................................................................21
2 Installation
Chapter contents......................................................................................................................23
Operating environment ............................................................................................................24
Interface ports .........................................................................................................................24
Software...................................................................................................................................25
Operating systems and printer components ....................................................................25
Printer drivers ...................................................................................................................26
Software for Macintosh computers ...................................................................................27
3 Operation
Chapter contents......................................................................................................................29
Control panel............................................................................................................................31
ENWW iii
Control-panel layout..........................................................................................................31
Control-panel buttons........................................................................................................32
Control-panel lights ...........................................................................................................33
Control-panel language ....................................................................................................34
Printing control-panel menus ............................................................................................34
Selecting which tray is used for printing .................................................................................35
Understanding tray order ..................................................................................................35
Customizing tray 1 operation ............................................................................................36
Printing by type and size of media (locking trays) ............................................................37
Feeding media from tray 1 manually ................................................................................38
Selecting the correct fuser mode ............................................................................................39
Using the embedded Web server ...........................................................................................40
Opening the embedded Web server ................................................................................40
Information tab ..................................................................................................................41
Settings tab .......................................................................................................................41
Networking tab ..................................................................................................................42
Other links .........................................................................................................................42
Using HP Web Jetadmin software ..........................................................................................43
Using the HP Toolbox .............................................................................................................44
Supported operating systems ...........................................................................................44
Supported browsers .........................................................................................................44
To view the HP Toolbox ...................................................................................................45
Status tab ..........................................................................................................................45
Troubleshooting tab ..........................................................................................................46
Alerts tab ...........................................................................................................................46
Documentation tab ...........................................................................................................47
Device Settings window ....................................................................................................47
Toolbox links .....................................................................................................................47
Other links .........................................................................................................................47
Uninstalling the HP Toolbox ....................................................................................................48
To uninstall the HP Toolbox by using the Windows desktop shortcut .............................48
Checking the printer configuration ..........................................................................................48
Menu map .........................................................................................................................48
Configuration page ...........................................................................................................49
Supplies status page ........................................................................................................51
PS or PCL font list ............................................................................................................52
Managing the print cartridge ...................................................................................................53
HP print cartridges ............................................................................................................53
Non-HP print cartridges ....................................................................................................53
Print-cartridge authentication ............................................................................................53
Print-cartridge storage ......................................................................................................53
Print-cartridge life expectancy ..........................................................................................54
Checking the supply level .................................................................................................54
Cartridge-low and cartridge-out conditions ......................................................................55
4 Maintenance
Chapter contents......................................................................................................................57
Cleaning the printer .................................................................................................................58
Cleaning the outside .........................................................................................................58
Cleaning the paper path and print-cartridge areas ...........................................................58
Cleaning the fuser ............................................................................................................60
5 Theory of operation
Chapter contents......................................................................................................................61
Introduction...............................................................................................................................62
iv
Internal components.................................................................................................................63
Timing.......................................................................................................................................64
Engine control system..............................................................................................................66
Laser/scanner system..............................................................................................................68
Pickup/feed/delivery system....................................................................................................69
Image-formation system...........................................................................................................71
Step 1: Primary charging...................................................................................................72
Step 2: Laser beam exposure...........................................................................................72
Step 3: Developing............................................................................................................73
Step 4: Transfer.................................................................................................................73
Step 5: Separation.............................................................................................................74
Step 6: Fusing....................................................................................................................74
Step 7: Drum cleaning.......................................................................................................75
Print cartridge memory system................................................................................................76
6 Removal and replacement
Chapter contents......................................................................................................................77
Introduction ..............................................................................................................................78
Removal and replacement strategy ..................................................................................78
Electrostatic discharge .....................................................................................................78
User-replaceable parts .....................................................................................................78
Required tools ...................................................................................................................78
Before performing service .......................................................................................................79
Pre-service procedures ....................................................................................................79
Parts removal order ..........................................................................................................80
Covers......................................................................................................................................81
Right-side cover.................................................................................................................81
Back cover.........................................................................................................................82
I/O cover............................................................................................................................85
Left-side cover...................................................................................................................86
Top, right cover..................................................................................................................88
Top cover...........................................................................................................................89
Front, right cover................................................................................................................90
Control panel............................................................................................................................92
Formatter..................................................................................................................................94
Fuser........................................................................................................................................98
Laser/scanner........................................................................................................................103
Right-side handle...................................................................................................................106
ECU........................................................................................................................................108
Access plate...........................................................................................................................114
Power supply..........................................................................................................................115
Gear assembly.......................................................................................................................120
Tray 1 solenoid.......................................................................................................................124
Tray 2 solenoid.......................................................................................................................125
E-label reader (memory tag)..................................................................................................126
Face-down-roller shaft...........................................................................................................128
Cartridge door........................................................................................................................130
Transfer roller.........................................................................................................................133
Registration assembly............................................................................................................134
Tray 1 pickup roller.................................................................................................................137
Tray 2 pickup roller.................................................................................................................138
Separation pad.......................................................................................................................140
7 Troubleshooting
Chapter contents....................................................................................................................141
ENWW v
Troubleshooting tree..............................................................................................................143
Troubleshooting flowchart .....................................................................................................144
1. Does the control-panel display show READY?...........................................................144
2. Can you print a configuration page? ..........................................................................145
3. Can you print from a program? ..................................................................................146
4. Does the job print as expected?..................................................................................147
5. Does the printer select the correct trays?...................................................................148
Troubleshooting tools ............................................................................................................149
Information pages ...........................................................................................................149
Embedded Web server ...................................................................................................154
Gaining access to the embedded Web server ...............................................................154
Printer Status and Alerts software ..................................................................................156
Control-panel menus .............................................................................................................158
Using control-panel menus .............................................................................................158
Resets submenu .............................................................................................................159
Diagnostics menu ...........................................................................................................159
Service menu (service PIN codes) .................................................................................161
Printer resets and power-on modes ......................................................................................163
Cold reset .......................................................................................................................163
NVRAM initialization .......................................................................................................164
Hard-disk initialization .....................................................................................................164
Power-on bypass ............................................................................................................165
Save + Restore................................................................................................................165
Test pages .............................................................................................................................166
Engine-test page ............................................................................................................166
Formatter test page ........................................................................................................166
Interface troubleshooting ......................................................................................................167
Communications checks .................................................................................................167
EIO troubleshooting ........................................................................................................167
Solving general printing problems .........................................................................................169
Clearing jams ........................................................................................................................173
Avoiding jams .................................................................................................................173
Typical jam locations ......................................................................................................174
Media handling problems ......................................................................................................181
Multiple pages feed ........................................................................................................181
Pages are wrinkled or folded ..........................................................................................182
Pages are skewed ..........................................................................................................182
Understanding printer messages ..........................................................................................183
Using the printer online Help system ..............................................................................183
Resolving persistent messages ......................................................................................183
Correcting print-quality problems ..........................................................................................201
Print-quality checklist ......................................................................................................201
Image-defect examples ..................................................................................................201
Light print (partial page) ..................................................................................................203
Light print (entire page) ..................................................................................................203
Specks ............................................................................................................................204
Dropouts .........................................................................................................................204
Lines ...............................................................................................................................205
Gray background ............................................................................................................205
Toner smear ...................................................................................................................206
Loose toner .....................................................................................................................206
Repeating defects ...........................................................................................................207
Repeating image ............................................................................................................207
Misformed characters .....................................................................................................208
Page skew ......................................................................................................................208
Curl or wave ....................................................................................................................209
vi ENWW
Wrinkles or creases ........................................................................................................209
Vertical white lines ..........................................................................................................210
Tire tracks .......................................................................................................................210
White spots on black ......................................................................................................211
Scattered lines ................................................................................................................211
Blurred print ....................................................................................................................212
Random image repetition ...............................................................................................212
Troubleshooting common Windows problems .....................................................................213
Troubleshooting common Macintosh problems ....................................................................214
Troubleshooting common PostScript problems ....................................................................220
General problems ...........................................................................................................220
Specific errors..................................................................................................................220
Printer component locations..................................................................................................222
Main assemblies..............................................................................................................222
Main parts........................................................................................................................223
Sensors and switches......................................................................................................224
Motors, fans, and solenoids.............................................................................................225
PCAs................................................................................................................................226
500-Sheet paper feeder...................................................................................................227
Wiring diagrams.....................................................................................................................228
General timing diagrams........................................................................................................231
8 Parts and diagrams
Chapter contents....................................................................................................................233
Ordering parts and supplies ..................................................................................................234
Parts ...............................................................................................................................234
Related documentation and software .............................................................................234
Supplies ..........................................................................................................................234
Accessories............................................................................................................................235
Covers....................................................................................................................................238
Internal components...............................................................................................................240
Tray 2 pickup assembly.........................................................................................................254
Alphabetical parts list.............................................................................................................256
Numerical parts list.................................................................................................................262
Index
ENWW vii

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