COPYRIGHT
©
2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001
CHAPTER 6 TROUBLESHOOTING
6-86
3.3.12 The copy has white spots (horizontal)
Developing assembly
1) Does the problem occur at intervals of about 58 mm or 79 mm?
YES: Perform the following:
1. Clean the developing members.
2. Dry wipe the surface of the developing cylinder.
3. If a scratch is found on the surface of the developing cylinder,
replace the developing cylinder.
Drum
2) Does the problem occur at intervals of about 340 mm?
YES: Perform the following:
1. Clean the drum.
2. If a scratch is found on the surface of the drum, replace the
drum.
Paper
3) Try fresh paper. Is the problem corrected?
YES: The paper is moist. Advise the user on the correct method of stor-
ing paper (place).
Scanner rail, Scanner cable
4) Does the problem occur only in copy images?
YES: Perform the following:
1. Check the scanner rail for foreign matter.
2. Adjust the tension of the scanner cable.
Charging wire
5) Does the problem occur at even intervals?
YES: Clean each charging wire.
Photosensitive drum
6) Is there a scratch on the surface of the photosensitive drum?
NO: Clean the charging assemblies.
YES: Replace the photosensitive drum.
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