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COPYRIGHT
©
1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
MECHANICAL SYSTEM
V. CHARGING SYSTEM
A. Drum Unit
1. Removing the Drum Unit
1) Open the front door.
2) Pull the developing assembly releasing lever q
to the front, and turn it clockwise.
Figure 4-501
3) Open the top body.
4) Turn the knob w counterclockwise, and re-
move it.
5) Pull out the drum unit e slowly to the front.
Figure 4-502
Caution:
Take extra care not to damage the photosensi-
tive drum.
Caution:
The photosensitive drum is highly susceptible
to light, and exposure even to room lighting
could lead to white spots or black bands on
copies.
As a rule, you must not turn on the copier with
the drum unit removed; otherwise, the following
can occur:
• The registration roller and the transfer guide
will interfere; rotation of the registration roller
during WMUPR can damage the registration
roller.
2. Cleaning
If the surface of the photosensitive drum be-
comes soiled, wipe it with a cloth coated with toner.
(Do not use paper, lint-free or otherwise.)
Caution:
You should never dry-wipe the surface of the
photosensitive drum or use solvent on it.
Do not use drum cleaning powder.
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