Canon LBP-1760 Service Manual page 183

2. Paper not suitable for duplex printing was used.
Action: Instruct the user to use the paper suitable for duplex printing.
3. Foreign materials or burrs are present on the feed guide.
Action: Remove the foreign materials. Replace the guide if it has burrs.
4. Worn or deformed rollers
Action: Replace worn or deformed rollers.
5. Paper dust or dirt on the rollers.
Action: Remove the paper dust and dirt.
6. Duplexing unit solenoid lever does not move smoothly, or is damaged.
Action: Adjust the lever so that it moves smoothly. Replace it if damaged.
7. Damaged or worn gears
Action: Replace any damaged or worn gear(s).
8. Sensor levers do not move smoothly, or are damaged.
Action: Adjust the levers so that they move smoothly. Replace them if damaged.
9. Defective motor
Action: Replace the motor.
10. Defective duplexing unit driver PCB
Action: Replace the duplexing unit driver PCB.
11. Defective engine controller PCB
Action: Replace the engine controller PCB.
CHAPTER 4
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