Canon CLC 1120 Service Manual page 602

Cause
Photosensitive
drum
Copy paper
Optical path
CCD, standard
white plate (dirt,
scratches)
Caution:
· Be sure to adjust the CCD if you have replaced the scanning lamp, mirror, CCD, or any
other optical part.
When Using Cleaner Lubricant
Before detaching the cap, shake the cleaner lubricant bottle well. Be sure to apply the
lubricant evenly along the cleaning blade. If uneven, its lubricating ingredients can slip under
the cleaning blade, adhere to the photosensitive drum, and cause vertical white lines in copy
images.
If such a problem is noted,
1) Make 10 solid black copies in Bk mono color.
· This step alone may correct the problem.
2) Remove the photosensitive drum, and coat a flannel cloth with black toner; then, wipe the
surface of the drum, and then mount the photosensitive drum.
· This step will remove the lubricating ingredient adhering to the surface of the
photosensitive drum.
COPYRIGHT © 1999 CANON INC.
Step
15 Are there scratches in the
peripheral direction of the
photosensitive drum?
16 When copy paper wraps around the
transfer drum, is it in contact with
the transfer cleaning brush,
polishing roller, or the like?
17 Clean the standard white plate,
scanning lamp, reflecting plate, and
mirror. Is the problem corrected?
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
Checks Yes/No Action
NO Clean the photosensitive
drum with a cloth coated
with toner. If the
scratches still remain,
replace the
photosensitive drum.
YES Correct the position of
any part that is in
contact.
YES End.
NO Try the following:
· Change the setting of
ADJUST>ADJ-
XY>ADJ-S in service
mode to change the
point of shading.
· Replace the standard
white plate.
· Replace the CCD unit.
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