Canon NP6621 Service Manual page 256

INSTALLATION
6) Set the paper size plates selected in step 4).
After setting the size plate, make sure it corresponds
to the paper size you have selected.
Figure 5-205
Caution:
If you are setting the plate for the position
representing the universal (U) cassette, you
must perform the work described for "universal
cassette paper size setting (505); see p. 3-131.
Points to Note When Handling the Photo-
sensitive Drum after Installation
The copier's photosensitive drum is highly sus-
ceptible to light; mere exposure to room light can
affect the drum enough to produce white spots or
black lines on the copies. Keep the following in
mind:
• Do not spend more than 5 min when removing
jams.
• After detaching the drum unit from the copier
during servicing work, be sure to protect it in
the light-blocking sheet that came with the
drum or fresh copy paper, and place the drum
in a dark place.
Do not touch the photosensitive drum or primary
charging roller.
If you have soiled the surface of the drum
inadvertently, wipe it using a flannel cloth coated
with toner; do not use paper, lint-free or otherwise.
Do not dry wipe or use solvent to clean the drum.
5–10
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)