The Copy Has White Spots (Horizontal) - Canon 1000 Service Manual

9

The copy has white spots (horizontal).

Cause Step
Rail on mirror 1
mount, Cable
of original
exposure
system
Developing 2
assembly
Transfer unit 3
4
5
Fixing roller 6
Paper
COPYRIGHT © 2001 CANON INC.
Checks
Generate a halftone test print (PG-
TYPE=5). Is the problem noted?
If all colors, go to step 5.
If a specific color, go to the next step.
Check the developing cylinder. Is it
normal?
Is the locking mechanism for the
transfer blade normal?
Does the transfer blade have warp-
ing, bending, or a fault?
Does the transfer belt have
scratches, bending, or a fault?
Is offset toner noted on the surface of
the fixing roller?
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
Yes/No
NO
NO
NO
YES
YES
YES
NO
Action
• Clean the rail of the
mirror mount.
• Check the cable of the
scanning system.
Replace the developing
assembly.
Remove the cause.
Replace the transfer blade.
Replace the transfer belt.
Check the fixing roller
(upper, lower) for deforma-
tion.
Is the paper moist?
Try different paper; advise
the user on the correct
method of storing paper.
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