HP 3500 Series

194 Removal and replacement ENWW
Door Switch (SW1) removal . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Test print switch (SW1001) removal . . . . . . . . . . . . . . . . . . . 243
Power switch (SW3001) removal . . . . . . . . . . . . . . . . . . . . . . 243
Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
Tray 1 (multipurpose tray) paper sensor (PS1) removal . . . . 245
Tray 2 (cassette) paper sensor (PS2) removal . . . . . . . . . . . 245
Registration paper sensor (PS4) removal . . . . . . . . . . . . . . . 247
Media sensor (PS5) removal . . . . . . . . . . . . . . . . . . . . . . . . . 248
Fuser front paper sensor (PS6) removal . . . . . . . . . . . . . . . . 249
Fuser delivery paper sensor (PS7) removal . . . . . . . . . . . . . 249
Face-down delivery paper sensor (PS8) removal . . . . . . . . . 250
Reversed paper sensor (PS9) removal (HP3700 only) . . . . . 251
Duplex feed delivery paper sensor (PS10) removal
(HP 3700 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
Rear output bin paper sensor (PS11) removal . . . . . . . . . . . 252
Color misregistration sensor (PS12) removal . . . . . . . . . . . . 253
Waste toner level sensor (PS13) removal . . . . . . . . . . . . . . . 254
Developing engaging sensor (PS14) removal . . . . . . . . . . . . 254
Environment sensor (PS15) removal . . . . . . . . . . . . . . . . . . . 255
Secondary transfer roller engaging sensor (PS16) removal . 255
Solenoids and Clutches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Tray 1 (multipurpose tray) pick-up solenoid (SL1) removal . . 257
Tray 2 pick-up solenoid (SL2) removal . . . . . . . . . . . . . . . . . 257
Secondary transfer roller engaging solenoid (SL4) removal . 258
Duplex feed solenoid (SL5) removal (HP3700 only) . . . . . . . 259
Registration clutch (CL1) removal . . . . . . . . . . . . . . . . . . . . . 260
Black (K) development clutch (CL2 - image drive) removal . . 261
Developing engaging drive clutch (CL3) removal . . . . . . . . . 261
Motor and fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Feed motor (M1) removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Delivery motor (M2) removal . . . . . . . . . . . . . . . . . . . . . . . . . 264
Drum motor (M3) removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
Developing motor (M4) removal . . . . . . . . . . . . . . . . . . . . . . . 266
Primary transfer roller engaging motor (M5) removal . . . . . . 268
Exhaust fan (FAN1) removal . . . . . . . . . . . . . . . . . . . . . . . . . 270
Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
DC controller PCB removal . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Formatter PCB removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
High-voltage power supply PCB removal . . . . . . . . . . . . . . . 276
Low-voltage power supply PCB removal . . . . . . . . . . . . . . . . 279
Memory controller PCB removal . . . . . . . . . . . . . . . . . . . . . . 280
Control Panel PCB removal . . . . . . . . . . . . . . . . . . . . . . . . . . 281
Miscellaneous parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
Swing rod guide, left . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
Swing rod/lock guide, right . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
Transfer contact assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
Developing contact assembly . . . . . . . . . . . . . . . . . . . . . . . . . 283
Tray 2 (cassette) parts removal. . . . . . . . . . . . . . . . . . . . . . . . . . . 285
Tray 2 (cassette) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285
Cassette (tray 2) guide, right, removal . . . . . . . . . . . . . . . . . . 285
500-Sheet paper feeder (tray 3) covers . . . . . . . . . . . . . . . . . . . . 290
Front cover removal - 500-sheet paper feeder . . . . . . . . . . . 290
Right cover removal - 500-sheet paper feeder . . . . . . . . . . . 291
Left cover removal - 500-sheet paper feeder . . . . . . . . . . . . . 291
500-Sheet paper feeder internal parts. . . . . . . . . . . . . . . . . . . . . . 292