The Copy Has Horizontal Fogging - Canon NP6330 Service Manual

19

The copy has horizontal fogging.

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