Canon NP6412 Service Manual page 128

CHAPTER 4 IMAGE FORMATION SYSTEM
4) Pull out the drum unit [3] slowly to the
front.
Caution:
1. Take care not to damage the photo-
sensitive drum.
2. The photosensitive drum is highly
susceptible to light. Exposure even to
room light can lead to white spots or
black bands on the copies.
3. Do not make a copy without the drum
unit installed. Otherwise, excess
loads can cause the gears of the drive
system to skip teeth, generating ab-
normal noise.
3. Cleaning
If the surface of the photosensitive drum
is soiled, wipe it with a flannel cloth coated
with toner. (Do not use paper, lint-free or oth-
erwise.)
Caution:
Do not dry wipe the drum or do not use a
solvent.
Do not use drum cleaning powder.
4-36
COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
[3]
Figure 4-304