Canon 1000 Service Manual page 512

7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
Horizontal Streaks
No. Color/location (A3)
1 Specific color (dark, horizon-
tal lines).
2 Specific color (light, horizon-
tal lines).
3 Specific color; leading edge
(black lines as if made by
rubbing).
4 Specific color
5 All colors
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COPYRIGHT © 2001 CANON INC.
Interval
Cause
(mm)
Drum A transfer memory exists
on the drum.
Traces of contact with the
developing cylinder exist
on the drum.
The trailing edge of
curled paper touched the
separation charging
assembly.
Random The output of the devel-
oping bias is faulty.
30 mm Dirt exists on the de-
(approx.) curling roller (upper).
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Generate 20 test prints
(PG=05, halftone) continu-
ously. (Try five times or so
while checking the images.)
If the problem is not cor-
rected, replace the drum.
Remove the curling from
the paper.
Check the wiring; if normal,
replace the developing bias
unit (HVT3-A/B).
Clean the roller.