Canon CLBP-460PS, Руководство по обслуживанию

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[ 2-6 ] Dirt on back of paper
<Possible causes>
1) Dirt on paper
Action: Replace the paper. At the same time, instruct the appropriate way to store paper.
2) Periodic dirt (fixing unit delivery roller, lower registration roller, secondary transfer roller,
lower fixing roller, cassette feed roller, and feed roller)
Action: Identify and clean the dirty rollers according to Table 4-2-2 on page 4-26. If the dirt
cannot be removed, replace them.
3) Dirty pick-up roller transfer guide, feed belt, fixing unit entrance guide, lower fixing unit sep-
aration guide.
Action: Clean the dirty parts. If the dirt cannot be removed, replace them.
[ 2-7 ] Dirt
<Possible causes>
1) Dirt on paper
Action: Replace the paper. At the same time, instruct the appropriate way to store paper.
2) Periodic dirt (cassette separation roller, registration roller, upper fixing roller, developing
cylinder, photosensitive drum, and primary charging roller)
Action: Identify and clean the dirty rollers according to Table 4-2-2 on page 4-26. If the dirt
cannot be removed, replace them.
Note: The developing cylinder, photosensitive drum, and primary charging roller cannot be
cleaned. Also, they cannot be replaced individually. Replace the cartridge (toner car-
tridge or drum cartridge) if these parts require replacement.
3) Dirty multi-purpose tray pick-up roller, fixing unit entrance guide, and upper fixing separa-
tion guide
Action: Clean the dirty areas. Replace them if the dirt cannot be removed.
4) Dirty intermediate transfer belt
Action: Clean the dirty areas. Replace the ITB unit if the dirt cannot be removed.
5) If the problem persists after cleaning the intermediate transfer belt and the belt becomes
dirty again, go to step 10).
6) Poor contact between the fixing separation bias contacts of the fixing unit and the printer
Action: Clean the fixing separation bias contacts of the fixing unit and the printer. If the
problem persists after cleaning, check the contacts and replace any deformed or
damaged part(s). If the contacts are slipped off, adjust them correctly.
7) Poor contact in connectors
Action: Reconnect the connectors between the high-voltage PCB and DC controller PCB cor-
rectly.
8) Defective high-voltage PCB (the fixing unit separation bias is not output)
Action: Replace the high-voltage unit.
9) Defective DC controller PCB
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CHAPTER 4