Section |
Page |
Theory of operation |
33 |
Basic operation |
34 |
Sequence of operation |
35 |
Engine-control system |
36 |
DC controller |
37 |
Solenoids |
37 |
Clutches |
38 |
Switches |
38 |
Sensors |
39 |
Motors |
40 |
Fans |
41 |
High-voltage power supply |
42 |
Low-voltage power supply |
44 |
Overcurrent/overvoltage protection |
45 |
Safety |
45 |
Voltage detection |
45 |
Sleep (powersave) mode |
45 |
Low-voltage power supply failure |
45 |
Fuser control |
46 |
Fuser temperature control |
47 |
Fuser sleeve temperature protection |
47 |
Failure detection |
48 |
Fuser unit identification |
49 |
Fuser unit life detection |
49 |
Laser/scanner system |
50 |
Laser/scanner failure |
51 |
Protective-glass cleaners |
51 |
Image-formation system |
53 |
Image-formation process |
55 |
Step 1: Pre-exposure |
56 |
Step 2: Primary charging |
56 |
Step 3: Laser-beam exposure |
57 |
Step 4: Development |
57 |
Step 5: Primary transfer |
58 |
Step 6: Secondary transfer |
58 |
Step 7: Separation |
59 |
Step 8: Fusing |
59 |
Step 9: ITB cleaning |
60 |
Step 10: Drum cleaning |
60 |
Print cartridge |
60 |
Developing-roller engagement and disengagement |
62 |
Intermediate transfer belt (ITB) unit |
63 |
Primary-transfer-roller engagement and disengagement |
64 |
ITB cleaning |
66 |
Calibration |
66 |
Color-misregistration control |
67 |
Image-stabilization control |
67 |
Pickup, feed, and delivery system |
69 |
Pickup-and-feed unit |
73 |
Cassette pickup |
73 |
Cassette-presence detection |
74 |
Cassette lift operation and cassette paper-presence detection |
75 |
Cassette multiple-feed prevention |
75 |
Multipurpose tray pickup |
76 |
Paper feed |
77 |
Skew-feed prevention |
79 |
Paper detection |
79 |
Feed speed control |
80 |
Fusing and delivery unit |
80 |
Loop control |
81 |
Pressure-roller pressurization control |
83 |
Duplexing unit (HP Color LaserJet CP4525dn, HP Color LaserJet CP4025dn, and HP Color LaserJet CP4525 ... |
84 |
Duplexing reverse and feed control |
84 |
Duplex print operation |
85 |
Jam detection |
87 |
Optional paper feeder |
89 |
Motor control |
91 |
Paper-feeder pickup and feed operation |
92 |
Paper-size detection and cassette-presence detection |
94 |
Paper-feeder cassette lift operation |
95 |
Paper feeder jam detection |
96 |
Removal and replacement |
99 |
Introduction |
100 |
Removal and replacement strategy |
100 |
Electrostatic discharge |
101 |
Required tools |
101 |
Before performing service |
102 |
After performing service |
102 |
Post-service test |
103 |
Print-quality test |
103 |
Parts removal order |
104 |
Customer self repair (CSR) components |
106 |
Print cartridges |
106 |
Toner-collection unit |
108 |
Formatter PCA |
110 |
Hard drive |
111 |
Remove the hard drive |
111 |
Memory DIMM |
113 |
Remove the memory DIMM |
113 |
Enable memory |
114 |
Tray |
116 |
Fuser |
117 |
Feed and separation rollers (Trays 2-5) |
118 |
Pickup roller (Tray 1) |
119 |
Secondary transfer roller |
122 |
Reinstall the transfer roller |
123 |
Intermediate transfer belt (ITB) |
124 |
External panels, covers, and doors |
127 |
Identification and location |
127 |
Upper-left cover |
128 |
Power-supply cover |
130 |
Left cover |
131 |
Remove the left cover |
131 |
Front-top cover |
132 |
Remove the front-top cover |
132 |
Rear-top cover |
134 |
Remove the rear-top cover |
134 |
Right-front cover |
135 |
Remove the right-front cover |
135 |
Reinstall the power button |
136 |
Control-panel assembly |
137 |
Remove the control-panel assembly |
137 |
Front-door assembly |
139 |
Remove the front-door assembly |
139 |
Right-rear cover |
142 |
Remove the right-rear cover |
142 |
Rear cover |
144 |
Remove the rear cover |
144 |
Right-door assembly |
145 |
Internal assemblies |
150 |
Cassette feed guide |
150 |
Secondary transfer assembly |
151 |
Reinstall the secondary transfer assembly |
152 |
Separation pad (Tray 1) |
153 |
Remove the separation pad (Tray 1) |
153 |
Registration density (RD) sensor assembly |
156 |
Remove the RD sensor assembly |
156 |
Registration assembly |
160 |
Remove the registration assembly |
161 |
Residual-toner-feed motor |
165 |
Remove the residual-toner-feed motor |
165 |
Residual-toner duct and feed assembly |
166 |
Remove the residual-toner duct and feed assembly |
166 |
Cartridge fan and environmental sensor |
169 |
Remove the cartridge fan and environmental sensor |
169 |
Toner-collection sensor and scanner-thermistor assembly |
173 |
Remove the toner-collection sensor and scanner-thermistor assembly |
173 |
Delivery fan |
175 |
Remove the delivery fan |
175 |
Delivery assembly |
177 |
Remove the delivery assembly |
177 |
Reinstall the delivery assembly |
181 |
Duplex-drive assembly |
183 |
Remove the duplex-drive assembly |
183 |
Power-supply fan |
184 |
Remove the power-supply fan |
184 |
Interconnect board (ICB) |
185 |
Remove the ICB |
185 |
DC controller PCA only |
187 |
Remove the DC controller PCA only |
187 |
Low-voltage power supply (LVPS) |
189 |
Remove the low-voltage power supply |
189 |
DC controller PCA and tray |
193 |
Remove the DC controller PCA and tray |
193 |
High-voltage power supply lower (HVPS-D) |
195 |
Remove the high-voltage power supply lower |
195 |
Reinstall the high-voltage power supply lower |
199 |
Developing-disengagement motor |
200 |
Remove the developing-disengagement motor |
200 |
Exhaust fan and fan duct |
201 |
Remove the exhaust fan and fan duct |
201 |
Reinstall the exhaust fan and fan duct |
203 |
Pickup motor |
204 |
Remove the pickup motor |
204 |
Lifter-drive assembly |
205 |
Remove the lifter-drive assembly |
205 |
Lifter base assembly |
207 |
Remove the lifter base assembly |
207 |
Reinstall the lifter base assembly |
208 |
Tray-pickup drive assembly |
210 |
Remove the tray-pickup drive assembly |
210 |
Tray-pickup assembly |
212 |
Remove the tray-pickup assembly |
212 |
Laser/scanner assembly (Y/M) |
218 |
Remove the laser/scanner assembly (Y/M) |
219 |
Laser/scanner assembly (C/Bk) |
222 |
Remove the laser/scanner assembly (C/Bk) |
223 |
Reinstall the protective glass cleaner (PGC) actuators |
225 |
High-voltage power supply upper (HVPS-T) |
228 |
Remove the high-voltage power supply upper |
228 |
Reinstall the high-voltage power supply upper |
230 |
Yellow, magenta, cyan, and black drum motors |
231 |
Remove the yellow, magenta, cyan, and black drum motors |
231 |
Fuser motor |
232 |
Remove the fuser motor |
233 |
ITB motor |
234 |
Remove the ITB motor |
234 |
Main-drive assembly |
235 |
Remove the main-drive assembly |
236 |
Reinstall the main-drive assembly |
239 |
Fuser-drive assembly |
243 |
Remove the fuser-drive assembly |
244 |
Reinstall the fuser-drive assembly |
247 |
Optional paper feeder assemblies (1 x 500-sheet and 3 x 500-sheet) |
248 |
Front door (optional paper feeder) |
248 |
Rear cover (optional paper feeder) |
250 |
Right-front cover (optional paper feeder) |
251 |
Right door (optional paper feeder) |
252 |
Left cover (optional paper feeder) |
254 |
Remove the left cover (optional paper feeder) |
254 |
Right cover (optional paper feeder) |
256 |
Remove the right cover (optional paper feeder) |
256 |
Rear-right cover (optional paper feeder) |
257 |
Remove the rear-right cover (optional paper feeder) |
257 |
Pickup assembly (optional paper feeder) |
258 |
Remove the pickup assembly (optional paper feeder) |
258 |
Lifter assembly (optional paper feeder) |
261 |
Remove the lifter assembly (optional paper feeder) |
261 |
Lifter-drive assembly (optional paper feeder) |
262 |
Remove the lifter-drive assembly (optional paper feeder) |
262 |
Pickup motor assembly (optional paper feeder) |
263 |
Remove the pickup motor (optional paper feeder) assembly |
263 |
Controller PCA (optional paper feeder) |
264 |
Remove the controller PCA (optional paper feeder) |
264 |
Solve problems |
265 |
Solve problems checklist |
266 |
Menu map |
268 |
Troubleshooting process |
269 |
Determine the problem source |
269 |
Pre-troubleshooting checklist |
269 |
Troubleshooting flowchart |
271 |
Power subsystem |
272 |
Power-on checks |
272 |
Power-on troubleshooting overview |
272 |
Tools for troubleshooting |
274 |
Individual component diagnostics |
274 |
LED diagnostics |
274 |
Understand lights on the formatter |
274 |
HP Jetdirect LEDs |
274 |
Heartbeat LED |
275 |
Engine diagnostics |
275 |
Defeating interlocks |
275 |
Disable cartridge check |
276 |
Engine-test button |
276 |
Paper-path test |
277 |
Manual sensor test (special-mode test) |
278 |
A TOP (top of page) sensor |
279 |
B and C loop sensors |
280 |
D fuser delivery sensor |
281 |
E duplex re-pickup sensor |
282 |
F output bin full sensor |
283 |
I developer alienation |
284 |
J fuser pressure-release sensor |
285 |
K primary transfer-roller-disengagement sensor |
286 |
L media sensor |
288 |
M front-door switch |
289 |
N right-door switch |
290 |
Manual sensor test 2 (special-mode test) |
291 |
O Tray 1 paper present sensor |
293 |
P Tray 2 paper present sensor |
294 |
Q Tray 2 paper surface 1 and 2 sensors |
295 |
R Tray 2 paper size switches |
296 |
S Tray 3 paper present sensor |
297 |
T Tray 3 feed sensor |
297 |
U Tray 3 paper surface 1 and 2 sensors |
297 |
V Tray 3 paper size switches |
297 |
W Tray 4 paper present sensor |
297 |
X Tray 4 feed sensor |
297 |
Y Tray 4 paper surface 1 and 2 sensors |
297 |
Z Tray 4 paper size switches |
298 |
a Tray 5 paper present sensor |
298 |
b Tray 5 feed sensor |
298 |
c Tray 5 paper surface 1 and 2 sensors |
298 |
d Tray 5 paper size switches |
298 |
5V laser and 24V interlock and logic switches (and power switch) |
299 |
Location and testing |
299 |
Defeating |
300 |
New ITB sensor |
303 |
Tray 3, 4, and 5 right door switch |
304 |
Paper-path sensors test |
305 |
Print/stop test |
305 |
Component tests |
306 |
Component test (special-mode test) |
306 |
Diagrams |
309 |
Block diagrams |
309 |
Plug/jack locations |
312 |
Location of connectors |
313 |
DC controller connector locations |
313 |
Controller PCA (1 x 500-sheet and 3 x 500-sheet optional paper feeders) |
315 |
Locations of major components |
316 |
General timing chart |
326 |
Circuit diagrams |
327 |
HP Easy Printer Care |
331 |
Open the HP Easy Printer Care software |
331 |
HP Easy Printer Care software sections |
331 |
Internal print-quality test pages |
334 |
Print-quality-troubleshooting pages |
334 |
Diagnostics page |
337 |
Cleaning page |
338 |
Configuration page |
339 |
Configuration page |
339 |
HP embedded Jetdirect page |
341 |
Embedded protocol page |
342 |
Finding important information on the configuration pages |
343 |
Color-band test |
343 |
Print-quality troubleshooting tools |
344 |
Repetitive defects ruler |
344 |
Calibrate the product |
345 |
Control panel menus |
346 |
Control panel menus |
346 |
Show Me How menu |
346 |
Retrieve job menu |
346 |
Information menu |
349 |
Paper handling menu |
349 |
Manage supplies menu |
350 |
Configure device menu |
353 |
Printing menu |
353 |
PCL sub-menu |
355 |
Print Quality menu |
356 |
System setup menu |
361 |
I/O menu |
366 |
Resets menu |
374 |
Diagnostics menu |
374 |
Service menu |
376 |
Interpret control-panel messages |
377 |
Control-panel message types |
377 |
Control-panel messages |
377 |
Event log messages |
408 |
Print an event log |
408 |
Show an event log |
408 |
Sample event log |
409 |
Clear the event log |
409 |
Event log message table |
410 |
Clear paper jams |
415 |
Common causes of jams |
415 |
Jam locations |
418 |
Clear jams in the right door |
419 |
Clear jams in the output bin area |
422 |
Clear jams in Tray 1 |
422 |
Clear jams in Tray 2 or optional Trays 3, 4, or 5 |
424 |
Clear jams in the lower right door (Tray 3, 4, or 5) |
425 |
Jam causes and solutions |
426 |
Jams in the output bin |
426 |
Jams in the fuser and transfer area |
426 |
Jams in the duplex area (HP Color LaserJet CP4525dn, HP Color LaserJet CP4025dn, and HP Color LaserJ ... |
429 |
Jams in Tray 1, Tray 2 and internal paper path |
431 |
Jams in Tray 3, 4, and 5 |
432 |
Change jam recovery |
434 |
Solve paper-handling problems |
435 |
Product feeds multiple sheets |
435 |
Product feeds incorrect page size |
435 |
Product pulls from incorrect tray |
435 |
Paper does not feed automatically |
436 |
Paper does not feed from Tray 2, 3, 4, or 5 |
436 |
Transparencies or glossy paper will not feed |
437 |
Envelopes jam or will not feed in the product |
437 |
Output is curled or wrinkled |
438 |
Product will not duplex or duplexes incorrectly |
438 |
Use manual print modes |
440 |
Solve image-quality problems |
442 |
Image defects table |
442 |
Clean the product |
448 |
Clean the paper path |
448 |
Solve performance problems |
449 |
Solve connectivity problems |
450 |
Solve direct-connect problems |
450 |
Solve network problems |
450 |
Service mode functions |
452 |
Service menu |
452 |
Product resets |
455 |
Restore factory-set defaults |
455 |
Hard disk initialization (optional) |
455 |
NVRAM initialization |
455 |
Product cold reset |
456 |
Product updates |
456 |
Parts and diagrams |
457 |
Order parts, accessories, and supplies |
458 |
Part numbers |
459 |
Accessories |
459 |
Print cartridges and toner collection unit |
459 |
Memory |
459 |
Cables and interfaces |
459 |
Customer self repair (CSR) parts |
460 |
Service maintenance kits |
460 |
Unique components |
461 |
Screws |
462 |
How to use the parts lists and diagrams |
463 |
External covers, panels, and doors |
464 |
Right door assembly |
466 |
Front door assembly |
468 |
Internal components |
470 |
Internal components (1 of 7) |
470 |
Internal components (2 of 7) |
472 |
Internal components (3 of 7) |
474 |
Internal components (4 of 7) |
476 |
Internal components (5 of 7) |
478 |
Internal components (6 of 7) |
480 |
Internal components (7 of 7) |
482 |
Cassettes 2-5 |
484 |
Paper pickup assembly |
486 |
Tray 1 paper pickup assembly |
488 |
Registration assembly |
490 |
Secondary transfer assembly |
492 |
Delivery assembly |
494 |
Fuser assembly |
496 |
PCAs |
498 |
Assessories |
500 |
Paper feeders |
500 |
Paper feeder external covers, panels, and doors |
502 |
1 X 500 paper feeder main body |
504 |
3 X 500 paper feeder main body |
506 |
Alphabetical parts list |
508 |
Numerical parts list |
516 |
Service and support |
525 |
Hewlett-Packard limited warranty statement |
526 |
HP's Premium Protection Warranty: LaserJet print cartridge limited warranty statement |
527 |
HP Color LaserJet Fuser Kit Limited Warranty Statement |
528 |
End User License Agreement |
529 |
Customer self-repair warranty service |
531 |
Customer support |
532 |
Product specifications |
533 |
Physical specifications |
534 |
Performance specifications |
534 |
Electrical specifications |
534 |
Acoustic specifications |
535 |
Environmental specifications |
535 |
Skew specifications |
536 |
Regulatory information |
537 |
FCC regulations |
538 |
Environmental product stewardship program |
539 |
Protecting the environment |
539 |
Ozone production |
539 |
Power consumption |
539 |
Toner consumption |
539 |
Paper use |
539 |
Plastics |
539 |
HP LaserJet print supplies |
539 |
Return and recycling instructions |
540 |
United States and Puerto Rico |
540 |
Multiple returns (more than one cartridge) |
540 |
Single returns |
540 |
Shipping |
540 |
Residents of Alaska and Hawaii |
540 |
Non-U.S. returns |
540 |
Paper |
540 |
Material restrictions |
541 |
Disposal of waste equipment by users in private households in the European Union |
541 |
Chemical substances |
541 |
Material Safety Data Sheet (MSDS) |
542 |
For more information |
542 |
Declaration of Conformity |
543 |
Safety statements |
544 |
Laser safety |
544 |
Canadian DOC regulations |
544 |
VCCI statement (Japan) |
544 |
Power cord instructions |
544 |
Power cord statement (Japan) |
544 |
EMC statement (China) |
545 |
EMC statement (Korea) |
545 |
EMI statement (Taiwan) |
545 |
Laser statement for Finland |
545 |
GS statement (Germany) |
546 |
Substances Table (China) |
546 |
Restriction on Hazardous Substances statement (Turkey) |
546 |