CHAPTER 13 TROUBLESHOOTING
13-94
COPYRIGHT © 1999 CANON INC. CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
22
The copy has color displacement (entire area; random).
Cause
------------
Photosensitive
drum shaft
Flywheel
Photosensitive
drum drive
assembly
Action
Tighten the screw.
Tighten the fixing screw.
Mount the flywheel
properly.
Check the 140T gear and
the 108/20T gear of the
photosensitive drum
drive assembly for
damage and dirt.
Step
1
2
3
4
Yes/No
YES
YES
YES
NO
Checks
Generate a grid test print
(TYPE=6), and make a check.
Is the screw on the core fixing roll
of the photosensitive drum loose?
Is the fixing screw of the flywheel
loose?
Is the flywheel mounted at an
angle?
23
The copy has uneven density (at intervals of 1.8 mm).
Cause
------------
Photosensitive
drum shaft
Transfer drum
assembly
Action
Tighten the screw.
Mount the handle
properly.
Use a specified screw.
Clean, or replace the
part.
Clean, or replace the
part.
Clean, or replace the
part.
Check the transfer blade/
attraction brush for
deformation; replace any
deformed part.
Step
1
2
3
4
5
6
7
Yes/No
YES
YES
YES
YES
YES
YES
NO
Checks
Generate a halftone test print using
TYPE=5 (DENS-M/C/Y/K=25,
TXPH=0), and make a check.
Is the screw on the core fixing roll
of the photosensitive drum loose?
Is the return spring of the jam
removal handle of the transfer
drum displaced?
Is the separation charging assembly
mounted to the transfer drum with
a screw other than specified
(M4x6; binding)?
Is there damge, dents, or caking of
toner on the photosensitive drum or
the drum flange?
Is there dirt or damge on the 300T
gear of the transfer drum?
Is there deformation, damge, or
caking of toner on the positioning
rubber ring (FB2-0524), transfer
drum sheet connecting plate,
transfer drum frame, or transfer
sheet?
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