HP LaserJet CP3525 - Page 9

LED diagnostics .............................................................................................. 319
Understand lights on the formatter ................................................. 319
Engine diagnostics .......................................................................................... 320
Diagnostics menu ........................................................................... 320
Diagnostics mode ........................................................................... 321
Diagnostics that put the engine into the special diagnostics
mode ............................................................................................... 321
Defeating interlocks ........................................................................ 321
Disable cartridge check .................................................................. 323
Engine-test button .......................................................................... 323
Paper-path test ................................................................................................ 324
Manual sensor test (special-mode test) .......................................................... 325
A TOP (top of page) sensor ............................................................ 325
B and C loop sensors ..................................................................... 326
D fuser (fixing) delivery sensor ....................................................... 327
E duplex re-pickup sensor .............................................................. 328
F output bin full sensor ................................................................... 328
H fuser (fixing) pressure-release sensor ....................................... 329
I primary transfer-roller disengagement sensor .............................. 330
K right and front door interlock switches ......................................... 332
Manual sensor test 2 (special-mode test) ....................................................... 334
L Tray 1 media present sensor ...................................................... 334
M Tray 2 paper out sensor ............................................................. 335
N Tray 2 closed sensor ................................................................... 336
O Tray 2 stack-surface sensor ...................................................... 336
P optional Tray 3-empty sensor ...................................................... 337
Q optional Tray 3 media-feed sensor (Q) ....................................... 338
R optional Tray 3 stack-surface sensor (R) .................................... 338
S, T, and U optional Tray 3 media-size sensors ............................ 339
Paper-path sensors test .................................................................................. 340
Print/stop test .................................................................................................. 340
Component tests ............................................................................................. 341
Component test (special-mode test) ............................................... 341
Diagrams ......................................................................................................................... 343
Formatter PCA ................................................................................................ 343
Location of connectors .................................................................................... 344
DC controller PCA .......................................................................... 344
Paper feeder driver PCA ................................................................ 345
PCAs, motors, fans, switches, solenoids, and clutches .................................. 345
Base product .................................................................................. 346
1 x 500 paper feeder ...................................................................... 352
Sensors ........................................................................................................... 353
General timing chart ........................................................................................ 355
Circuit diagrams .............................................................................................. 355
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