Canon LBP1760P, Service Manual

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J-3. Cassette pick-up block
<Possible causes>
1. Defective video controller PCB
Action: Make a test print from the cassette. If the paper is picked up correctly, replace the
video controller PCB.
2. Dirty, worn, or deformed cassette pick-up roller, cassette separation roller, and cassette feed
roller
Action: Clean the roller(s) if dirty. Replace it if worn or deformed. The cassette separation
roller and the cassette feed roller are to be replaced together.
3. Deformed cassette claw
Action: Replace the cassette claw if deformed.
4. Damaged parts in the pick-up module drive unit
Action: Remove the pick-up module and replace any damaged parts.
5. Defective cassette pick-up solenoid
Action: Disconnect the cassette pick-up solenoid connector J604 from the paper size detec-
tion PCB, with the pick-up module removed. Measure the resistance between cable
side connector J604-1 and J604-2. If it is not about 110 , replace the cassette pick-
up solenoid.
6. Defective paper size detection PCB
Action: Replace the paper size detection PCB.
7. Defective engine controller PCB
Action: Replace the engine controller PCB.
J-4. Paper feeder pick-up block
<Possible causes>
1. Defective video controller PCB
Action: Make a test print from the paper feeder. If the paper is picked up correctly, replace
the video controller PCB.
2. Dirty, worn, or deformed pick-up roller, cassette separation roller, and cassette feed roller
Action: Clean the roller(s) if dirty. Replace it if worn or deformed. The cassette separation
roller and the cassette feed roller are to be replaced together.
3. Deformed cassette claw
Action: Replace the cassette claw if deformed.
4. Damaged gears
Action: Check the gears of printer and paper feeder, and replace any damaged gears.
5. Defective paper feeder pick-up solenoid
Action: Disconnect the paper feeder pick-up solenoid connector J802 from the paper feed-
er driver PCB. Measure the resistance between cable side connector J802-1 and
J802-2. If it is not about 110 , replace the paper feeder pick-up solenoid.
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CHAPTER 4