Canon LBP 2460 Service Manual - Page 267
Action, J-3 Duplexing Unit, Replace worn or deformed rollers.
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CHAPTER 4 Action: Check whether any gears are worn or missing. 3. The fixing entrance guide is dirty, damaged, or clogged with toner. Action: Clean the guide. 4. The fixing separation guide is dirty, damaged, or clogged with toner. Action: Clean the guide. 5. The fixing separation claw is worn or damaged. Action: Replace the claw. 6. The upper or fixing lower roller is deformed or damaged. Action: Replace deformed or damaged rollers. 7. The nip width of the fixing lower unit is not correct. Action: Replace the fixing unit. 8. The fixing unit delivery sensor arm does not move smoothly or is damaged. Action: Adjust the arm so that it moves smoothly. If it is damaged, replace it. 9. The fixing unit delivery roller is worn. Action: Replace the fixing unit delivery roller. 10. The fixing unit delivery roller does not rotate smoothly. Action: Check whether any gears are worn or missing. 11. The face-down delivery roller does not rotate smoothly. Action: Check whether any gears are worn or missing. J-3 Duplexing Unit 1. Foreign matter is adhering to the feed guide or it is burred. Action: Remove any foreign matter. If the guide is burred, replace it. 2. The switchback roller, feed roller, or duplex feed roller is worn or deformed. Action: Replace worn or deformed rollers. 3. Paper dust or dirt is adhering to rollers. Action: Remove the paper dust or dirt. 4. Gears are worn or damaged. Action: Replace any worn or damaged gears. 5. Sensor arms do not move smoothly or are damaged. Action: Adjust the arm so that they move smoothly. If damaged, replace them. 6. Duplexing unit sensors are defective. Action: Check the state of each sensor using the printer driver tester. Replace any defective sensors. 4 - 53
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