Canon CLC 1120 Service Manual page 601

CHAPTER 13 TROUBLESHOOTING
6 The copy has white lines.
Cause
------------
------------
------------
Fixing assembly
Developing
assembly
Cleaner lubricant
Dust-proofing
glass
Transfer charging
assembly
Separation
assembly
13-74
COPYRIGHT © 1999 CANON INC.
Step Checks
1 Clean the charging assembly, dust-
proofing glass, reflecting mirror,
and lens. Is the problem corrected?
2 Generate a halftone test print
(TYPE=5). Is the problem noted?
3 Generate a horizontal stripe test
print (TYPE=10). Is the problem
noted in a specific color of the copy
image?
4 Clean the fixing assembly inlet
guide (upper, lower). Is the
problem corrected?
5 Are there scratches and dents in the
peripheral direction of the fixing
roller (upper, lower)?
6 Is there a fault in the cleaning belt
take-up mechanism or cleaning
performance?
7 Is there a fault on the fixing
separation claw or the separation
guide?
8 Are there scratches or dents in the
oil removing blade?
9 Is the edge of the blade of the
developing assembly for the color
in which white lines are found
faulty?
10 Did the problem occur at time of
installation or replacement of the
photosensitive drum?
11 Clean the dust-proofing glass of the
laser exposure system. Is the
problem corrected?
12 Is the transfer blade or the transfer
blade protective sheet warped or
faulty?
13 Clean the separation charging
assembly. Is the problem
corrected?
14 Are the operation and the position
of operation of the transfer
separation claws normal?
Yes/No
YES
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
End.
Go to step 17.
Go to step 9.
End.
Remove the cause of the
scratches, and replace
the fixing roller.
Remove the cause of the
fault, and replace the
part.
Clean or replace the
part.
Clean or replace the
part.
Clean or replace the
blade.
The cleaner lubricant
may be suspected. See
the notes on the use of
cleaner lubricant
(Caution).
End.
Correct the warping of
the transfer blade. If the
part is soiled with toner,
clean it with a blower
brush.
End.
Clean the transfer
separation claws, and
correct as necessary the
position of the claws.