Canon CLC 1120 Service Manual page 603

CHAPTER 13 TROUBLESHOOTING
7 The copy has lines/is foggy (horizontal).
Cause
------------
------------
Photosensitive
drum
Power supply
voltage, scanning
lamp regulator
Original exposure
system, CCD
13-76
COPYRIGHT © 1999 CANON INC.
Step Checks
1 Clean the primary charging
assembly, dust-proofing glass,
reflecting mirror, and lens. Is the
problem corrected?
2 Generate a halftone test print
(TYPE=5). Is the problem noted?
3 Is the problem noted at the same
position on A3 copies made in
continuous mode but noted at
different positions if copies are
made at intervals?
4 Does the scanning lamp flicker?
Yes/No
YES
NO
YES
NO
YES
NO
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
End.
Go to step 4.
The photosensitive drum
has memory. Find out
the cause of the
memory, and remove it;
then, replace it.
See the detailed
description of horizontal
lines on the next page.
1. Check the power
supply voltage for
fluctuations.
Be sure to connect
the copier to an
exclusive outlet.
2. Check the scanning
lamp and lamp
regulator.
Check the No. 1/2
mirror base for
wobbling. Check the
contact between CCD
and CCD driver.