The Copy Has Horizontal Fogging - Canon NP6330 Service Manual

19

The copy has horizontal fogging.

Cause
Step
1
Scanning lamp,
2
lamp regulator
Developing rolls
3
Developing bias
4
Scanning
5
system
Feeding system
COPYRIGHT © 1997 CANON INC.
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?
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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