CHAPTER 11 TROUBLESHOOTING
COPYRIGHT © 1997 CANON INC. CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
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The copy has horizontal fogging.
Cause
Scanning lamp,
lamp regulator
Developing rolls
Developing bias
Scanning
system
Feeding system
Checks
Is the problem noted at the same
location on all copies made in
Direct?
Does the scanning lamp flicker
while the scanner is moving
forward?
Are the developing rolls soiled
with toner or are the rolls
deformed? Or, is the area where
the developing rolls come into
contact (surface of the photosensi-
tive drum) soiled with toner?
Is the developing bias applied
normally?
Make a reduced copy and,
compare it against a copy made in
Direct. Is the problem noted at
different locations?
Step
1
2
3
4
5
YES/NO
YES
YES
YES
NO
YES
NO
Action
Go to step 5.
Check the scanning
lamp and the lamp
regulator.
Clean, or replace the
developing rolls as
necessary.
1. Re-set the develop-
ing assembly, and
check the wiring.
2. Replace the high-
voltage power supply
PCB.
Check the scanning
system
Check the feeding
system.
Содержание NP6330
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