Canon LBP-1210 Service Manual page 174

CHAPTER 4
2) The fixing film unit is defective.
Action: Replace the fixing film unit.
II-13. Poor fixing
<Possible causes>
1) The nip width of the fixing unit is not within the specification.
Action: Measure the nip width of the fixing unit according to "Checking the nip width of the
pressure roller" on Page 4-20. If it is not within the specification, replace the fixing
unit.
2) The pressure roller is dirty.
Action: Clean the roller. If dirt cannot be removed, replace it.
3) There is a scar or dent on the pressure roller surface.
Action: Replace the pressure roller.
4) There is a scar or dent on the fixing film.
Action: Replace the fixing film unit.
5) The thermistor is deteriorated.
Action: Replace the fixing film unit.
6) Defective engine controller PCB
Action: Replace the engine controller PCB.
II-14. Image distortion
<Possible causes>
1) The contact in the connectors on the laser/scanner unit is poor.
Action: Reconnect the connectors J801 and J802 on the laser/scanner unit correctly.
2) Poor contact in the intermediate PCB connectors.
Action: Reconnect the connectors J905 on the intermediate PCB correctly.
3) Poor contact in the engine controller PCB
Action: Reconnect the connector J201 on the engine controller PCB and the J907 on the
intermediate PCB correctly.
4) The laser/scanner unit is defective.
Action: Replace the laser/scanner unit.
5) The engine controller PCB is defective.
Action: Replace the engine controller PCB.
II-15. Faulty Registration
<Possible Causes>
1. Dirty or worn pickup roller.
Action: Clean the pickup roller. Replace the roller if the dirt cannot be removed or the roller
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