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HP LaserJet Pro 400 Service Manual - Page 129

CAUTION, Do not separate the connector and guide more than is shown

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4. In the following step, the connector and guide will be separated from the fuser. You must not use too much force and damage the lower portion of the guide. If the guide is damaged, the fuser must be replaced. Figure 1-140 Remove the fuser (4 of 8) 5. Carefully disconnect one connector (callout 1) and then rotate the connector and the top portion of the guide away from the fuser. CAUTION: Do not separate the connector and guide more than is shown in Figure 1-140 Remove the fuser (4 of 8) on page 103. If the guide is damaged, you must replace the fuser. Do not damage the connector. Figure 1-141 Remove the fuser (5 of 8) 1 ENWW Removal and replacement procedures 103

Section	Page
Removal and replacement	27
Removal and replacement strategy	28
Introduction	28
Removal and replacement strategy	28
Electrostatic discharge	29
Required tools	29
Types of screws	30
Service approach	31
Before performing service	31
After performing service	31
Post-service tests	32
Test 1 (print-quality test)	32
Test 2 (copy-quality test)	32
Test 3 (fax-quality test; fax models only)	32
Parts removal order	33
Removal and replacement procedures	35
Rollers and pads	35
Transfer roller	35
Pickup roller (Tray 2 and Tray 3)	36
Separation roller (Trays 2 or 3)	39
Reinstall the separation roller	41
Document feeder pickup roller assembly	42
Pickup roller and separation pad (Tray 1)	43
Main assemblies	46
Print-cartridge drawer	46
DIMM cover	48
Right cover	49
Document feeder input tray	51
Scanner assembly	52
Right-front cover and power button	54
Rear-upper cover (duplex product)	56
Paper-feed guide assembly	57
Rear-door stopper and link caps (simplex product)	58
Rear door (simplex product)	59
Rear door (duplex product)	61
Rear cover and feed guide (simplex product)	63
Remove the rear cover and feed guide (simplex product)	63
Rear-lower cover and rear-door links (duplex product)	67
Remove the rear-lower cover and rear-door links (duplex product)	67
Rear-door rib assembly (duplex product)	71
Remove the rear-door rib assembly (duplex product)	71
Link guide	73
Control panel and right-arm mount	74
Reinstall the control panel and right-arm mount	75
Upper-cover assembly	77
Remove the upper-cover assembly	77
Reinstall the upper-cover assembly	79
Left cover	81
Remove the left cover	81
Reinstall the left cover	83
Front-door assembly	84
Remove the front-door assembly	84
Reinstall the front-door assembly	89
Intermediate transfer belt (ITB)	91
Reinstall the ITB	94
Drum motor (M1) and developer motor (M2)	95
Reinstall the drum motor (M1) and developer motor (M2)	100
Intermediate PCA	101
Formatter PCA and fax PCA	102
Remove the formatter PCA and fax PCA	102
Wireless PCA	105
DC controller PCA	106
Remove the DC controller PCA	107
Fuser-motor assembly	109
Remove the fuser-motor assembly	109
Reinstall the fuser-motor assembly	112
High-voltage power-supply PCA	113
Remove the high-voltage power-supply PCA	113
Color-misregistration sensor assembly	116
Remove the color-misregistration sensor assembly	116
Reinstall the color-misregistration sensor assembly	118
Fan (FM1)	120
USB PCA (fax/memory-card models)	122
Remove the USB PCA	122
Duplex-reverse drive assembly	123
Remove the duplex-reverse drive assembly	123
Fuser	126
Remove the fuser	127
Reinstall the fuser	132
Paper-delivery assembly	133
Remove the paper-delivery assembly	133
Tray cassettes and optional Tray 3 assembly	136
Solve problems	137
Solve problems checklist	138
Menu map	139
Troubleshooting process	140
Pretroubleshooting checklist	140
Power-on checks	141
Troubleshooting tools	142
Component diagnostics	142
LED diagnostics	142
Network LEDs (network models only)	142
Control panel LEDs	142
Memory card LED (memory-card models only)	142
Component tests	143
Control-panel tests	143
Diagrams	144
Plug/jack locations	144
Location of connectors	145
DC controller PCA	145
Location of major components	147
Major components	147
Motors and fans	149
Rollers	150
PCAs	151
Optional 250-sheet cassette	152
General timing diagram	153
General circuit diagram	154
CPU/ASIC diagrams	155
HVT/Toner EMP diagram	157
Driver PCA diagram	158
Duplexer PCA diagram	159
FSR diagram	160
Internal print quality test pages	161
Print quality troubleshooting page	161
Print quality assessment page	161
Print the Configuration Page	161
Service page	161
Clean the paper path	162
Print-quality troubleshooting tools	162
Repetitive image defects	162
Calibrate the product	163
Control panel menus	163
Setup Menu	163
HP Web Services menu	164
Reports menu	165
Quick Forms menu	166
Fax Setup menu	167
System Setup menu	170
Service menu	175
Network Setup menu	177
Function specific menus	178
Copy menu	178
Fax menu	180
Scan menu	182
USB Flash Drive	183
Interpret control panel messages	183
Control panel message types	183
Control panel messages	183
10.100X Supply Memory Error	183
49 Error, Turn off then on	184
50.x Fuser Error	184
52 Scanner Error	184
57 Fan Error, Turn off then on	185
79 Error Turn off then on	185
Black Cartridge Low	185
Black in wrong position	186
Black Very Low	186
Canceled scan. Clear document	186
Canceled send. Clear document	186
Communication error.	187
Cyan Cartridge Low	187
Cyan in wrong position	187
Cyan Very Low	187
Device error, press OK	188
Device is busy. Try again later	188
Document feeder door is open.	188
Document feeder jam. Clear and reload.	188
Document feeder mispick. Reload	189
Door open	189
Engine Communication Error	189
Engine error. Press OK to continue.	189
Fax is busy. Canceled send.	190
Fax is busy. Redial pending.	190
Fax receive error.	190
Fax Send error.	191
Fax storage is full. Canceling the fax receive.	191
Fax storage is full. Canceling the fax send.	192
Fit to Page on flatbed only	192
Genuine HP supply installed	192
Incompatible <color>	192
Install [color] cartridge	192
Invalid driver Press OK	193
Invalid entry	193
Jam in (area), Open door and clear jam	193
Jam in Tray 1, Clear jam and then press OK	193
Load paper	193
Load Tray 1 <TYPE> <SIZE>, Press OK to use available media	193
Load Tray 1, <PLAIN> <SIZE> / Cleaning mode, OK to start	194
Load tray <X> Press [OK] for available media	194
Magenta Cartridge Low	194
Magenta in wrong position	194
Magenta Very Low	194
Manual Duplex Load Tray 1, Press OK	195
Manual feed <SIZE> <TYPE>, Press OK to use available media	195
Memory is low. Press OK.	195
Memory is low. Try again later	195
Memory low Only 1 copy made. Press OK to continue.	196
Misprint, Press OK	196
No dial tone.	196
No fax answer. Canceled send.	196
No fax answer. Redial pending.	197
No fax detected.	197
Print failure, press OK. If error repeats, turn off then on.	198
Remove shipping lock from <color> cartridge	198
Remove shipping locks from cartridges	198
Replace [color]	198
Scanner error #, Turn off then on	198
Scanner reserved for PC scan	199
Scanning error Cannot connect	199
Settings cleared	199
Unexpected size in tray # Load <size> Press [OK]	199
Unsupported <color> Press [OK] to continue	200
Used <color> in use	200
Used [color] installed, to accept press OK	200
Used supplies in use	200
Yellow Cartridge Low	200
Yellow in wrong position	201
Yellow Very Low	201
Event-log messages	201
Print the event log	202
Event log messages	202
Clear jams	206
Common causes of jams	206
Jam locations	206
Clear jams from the document feeder	207
Clear jams in Tray 1	209
Clear jams in Tray 2	212
Clear jams in the fuser area	213
Clear jams in the output bin	214
Clear jams in the duplexer (duplexing models only)	215
Solve paper-handling problems	217
The product picks up multiple sheets of paper	217
The product does not pick up paper	217
Solve image-quality problems	218
Print quality examples	218
Color image defects	222
Clean the product	224
Clean the pickup and separation rollers	224
Clean the paper path	224
Clean the paper path from the product control panel	224
Clean the scanner glass strip and platen	225
Clean the document feeder pickup rollers and separation pad	226
Clean the touch screen	227
Solve performance problems	228
Factors affecting print performance	228
Print speeds	229
The product does not print or it prints slowly	230
The product does not print	230
The product prints slowly	231
Solve product connectivity problems	232
Solve direct-connect problems	232
Solve network problems	232
Poor physical connection	232
The computer is using the incorrect IP address for the product	232
The computer is unable to communicate with the product	233
The product is using incorrect link and duplex settings for the network	233
New software programs might be causing compatibility problems	233
The computer or workstation might be set up incorrectly	233
The product is disabled, or other network settings are incorrect	233
Solve wireless network problems	233
Wireless connectivity checklist	234
The control panel displays the message: The wireless feature on this product has been turned off	234
The product does not print after the wireless configuration completes	234
The product does not print, and the computer has a third-party firewall installed	235
The wireless connection does not work after moving the wireless router or product	235
Cannot connect more computers to the wireless product	235
The wireless product loses communication when connected to a VPN	236
The network does not appear in the wireless networks list	236
The wireless network is not functioning	236
Service mode functions	237
Service menu	237
Service menu settings	237
Secondary service menu	237
Open the secondary service menu	238
Secondary service menu structure	238
Product resets	239
Restore the factory-set defaults	239
NVRAM initialization	239
Solve fax problems	241
Fax troubleshooting checklist	241
Fax error messages	243
Communication error.	243
Document feeder door is open. Canceled fax.	243
Fax is busy. Canceled send.	243
Fax is busy. Redial pending.	244
Fax receive error.	244
Fax Send error.	245
Fax storage is full. Canceling the fax receive.	245
Fax storage is full. Canceling the fax receive.	245
Fax storage is full. Canceling the fax send.	246
No dial tone.	246
No fax answer. Canceled send.	246
No fax answer. Redial pending.	247
No fax detected.	247
Troubleshoot fax codes and trace reports	249
View and interpret fax error codes	249
Fax trace report	250
Fax logs and reports	250
Print all fax reports	251
Print individual fax reports	251
Set the fax error report	252
Change error correction and fax speed	252
Set the fax-error-correction mode	252
Change the fax speed	253
Solve problems sending faxes	253
An error message displays on the control panel	253
The Communication error. message displays	253
No dial tone.	254
The Fax is busy. message displays	255
The No fax answer. message displays	255
Document feeder paper jam	256
The Fax storage is full. message displays	256
Scanner error	256
The control panel displays a Ready message with no attempt to send the fax	256
The control panel displays the message \	257
Faxes can be received, but not sent	257
Unable to use fax functions from the control panel	257
Unable to use speed dials	258
Unable to use group dials	258
Receive a recorded error message from the phone company when trying to send a fax	258
Unable to send a fax when a phone is connected to the product	259
Solve problems receiving faxes	260
The fax does not respond	260
The fax has a dedicated phone line	260
An answering machine is connected to the product	260
A telephone handset is connected to the product	261
The Answer Mode setting is set to the Manual setting	261
Voice mail is available on the fax line	261
The product is connected to a DSL phone service	262
The product uses a fax over IP or VoIP phone service	262
An error message displays on the control panel	263
The No fax detected. message displays	263
The Communication error. message displays	263
The Fax storage is full. message displays	264
The Fax is busy. message displays	264
A fax is received but does not print	265
The Private Receive feature is on	265
Sender receives a busy signal	265
A handset is connected to the product	265
A phone line splitter is being used	265
No dial tone	265
Cannot send or receive a fax on a PBX line	265
Solve general fax problems	266
Faxes are sending slowly	266
Fax quality is poor	267
Fax cuts off or prints on two pages	267
Product updates	269
Parts and diagrams	271
Order parts by authorized service providers	272
Orderable parts	272
Whole unit replacement	272
Related documentation and software	273
Supplies and accessories	274
Service parts	274
How to use the parts lists and diagrams	275
Scanner and document feeder main assemblies	276
Covers	278
Internal assemblies	280
Internal assemblies (1 of 5)	280
Internal assemblies (2 of 5)	282
Internal components (3 of 5)	284
Internal assemblies (4 of 5)	286
Internal assemblies (5 of 5)	288
Internal assemblies (simplex models)	290
Internal assemblies (duplex models)	292
PCAs	294
Input device(s)	296
250-sheet paper feeder (optional Tray 3)	296
Alphabetical parts list	298
Numerical parts list	301
Service and support	305
Hewlett-Packard limited warranty statement	306
HP's Premium Protection Warranty: LaserJet print cartridge limited warranty statement	308
Data stored on the print cartridge	309
End User License Agreement	310
OpenSSL	313
Customer support	314
Product specifications	315
Physical specifications	316
Power consumption, electrical specifications, and acoustic emissions	316
Environmental specifications	316
Regulatory information	317
FCC regulations	318
Environmental product stewardship program	318
Protecting the environment	318
Ozone production	318
Power consumption	318
Toner consumption	319
Paper use	319
Plastics	319
HP LaserJet print supplies	319
Return and recycling instructions	319
United States and Puerto Rico	319
Multiple returns (more than one cartridge)	320
Single returns	320
Shipping	320
Residents of Alaska and Hawaii	320
Non-U.S. returns	320
Paper	321
Material restrictions	321
Disposal of waste equipment by users in private households in the European Union	321
Chemical substances	322
Material Safety Data Sheet (MSDS)	322
For more information	323
Declaration of conformity	324
Declaration of conformity (wireless models)	326
Certificate of volatility	328
Types of memory	328
Volatile memory	328
Non-volatile memory	328
Safety statements	329
Laser safety	329
Canadian DOC regulations	329
VCCI statement (Japan)	329
Power cord instructions	329
Power cord statement (Japan)	329
EMC statement (Korea)	330
Laser statement for Finland	330
GS statement (Germany)	331
Substances Table (China)	331
Restriction on Hazardous Substances statement (Turkey)	331
Restriction on Hazardous Substances statement (Ukraine)	331
Additional statements for telecom (fax) products	332
EU Statement for Telecom Operation	332
New Zealand Telecom Statements	332
Additional FCC statement for telecom products (US)	332
Telephone Consumer Protection Act (US)	333
Industry Canada CS-03 requirements	333
Vietnam Telecom wired/wireless marking for ICTQC Type approved products	334
Additional statements for wireless products	335
FCC compliance statement—United States	335
Australia statement	335
Brazil ANATEL statement	335
Canadian statements	335
European Union regulatory notice	335
Notice for use in France	336
Notice for use in Russia	336
Korean statement	336
Taiwan statement	337
Vietnam Telecom wired/wireless marking for ICTQC Type approved products	337