Canon LBP-1000 Service Manual page 136

CHAPTER 4
gear(s).
4. Defective cassette pick-up solenoid
Action: Disconnect the cassette pick-up solenoid connector J405 from the engine controller
PCB. Measure the resistance between the cable side connector J405-1 and 405-2.
If it is not about 95 , replace the cassette pick-up solenoid.
5. Poor contact in the main motor drive signal line connector
Action: Reconnect the main motor connector J1702 and the intermediate PCB connector
J1007 correctly.
6. Defective main motor
Action: Replace the main motor.
7. Poor contact in the engine controller PCB connector
Action: Reconnect the engine controller PCB connector J401 correctly.
8. Defective engine controller PCB
Action: Replace the engine controller PCB.
III-3. Paper feeder pick-up block
<Possible causes>
1. Defective video controller PCB
Action: Make an engine test print from the cassette. If the printer feeds the paper normal-
ly, replace the video controller PCB.
2. Dirty, worn, or deformed pick-up roller
Action: Clean the pick-up roller if dirty. Replace it if worn or deformed.
3. Damaged gear
Action: Check gears of the printer and the paper feeder. Replace any damaged gear(s).
4. Defective pick-up solenoid
Action: Disconnect the pick-up solenoid connector J2002. Measure the resistance between
the cable side connector J2002-1 and J2002-2. If it is not about 95 , replace the
pick-up solenoid.
5. Poor contact in the main motor drive signal line connector.
Action: Reconnect the main motor connector J1702 and the intermediate PCB connector
J1007 correctly.
6. Defective main motor.
Action: Replace the main motor.
7. Poor contact in the engine controller PCB connector
Action: Reconnect the engine controller PCB connector J401 correctly.
8. Defective paper feeder PCB
Action: Replace the paper feeder PCB.
9. Defective engine controller PCB
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