Canon CLC 1120 Service Manual page 669

CHAPTER 13 TROUBLESHOOTING
48 Attraction fails.
Cause
Attraction
solenoid, spring
clutch, pressure
cam
Locking spring,
bushing
Attraction guide
High-voltage
cable
Grounding plate
Attraction
charging
assembly
Transfer drum
sheet
Copy paper
Service mode
(COPIER>
ADJUST>
MISC>ATT-
RTN)
13-142
COPYRIGHT © 1999 CANON INC.
Step Checks
1 At time of attraction, is the
attraction roller locked to the
transfer drum?
2 At time of attraction, does the
attraction roller rotate smoothly?
3 Is the position of the attraction
guide normal?
4 Is the connection of the high-
voltage cable inside the transfer
drum normal?
5 Is the resistance between the
attraction roller and the copier's
side plate about 20 M ?
6 Replace the attraction charging
assembly. Is the problem
corrected?
7 Does the transfer drum sheet have
scratches or dents?
8 Is the copy paper curled, wavy, or
otherwise out of shape?
9 Replace the paper with paper fresh
out of package. Is the problem
corrected?
10 Try paper of a type recommended
by Canon. Is the problem
corrected?
11 Is regular paper free of the
problem?
12 Does the problem occur only in
single-sided copying or when
copying on the first side of a
double-sided copy?
13 Does the problem occur only on the
second side of a double-side copy?
Yes/No
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Check or replace the
attraction solenoid,
spring clutch, or locking
cam.
Check the locking spring
of the attraction guide
and the bushing of the
attraction roller.
Mount the guide
properly.
Connect the cable
properly.
Check the bushing of the
attraction roller and the
grounding plate at the
front.
End.
Replace the sheet.
Replace the paper.
Advise the user on the
correct method of
storing paper.
End.
Advise the user to use
recommended paper.
Advise the user to use
recommended paper.
Go to step 16. (Set
COPIER>ADJUST>
MISC>ATT-RTN1 to '1'
in service mode.
Set COPIER>ADJUST>
MISC>ATT-RTN2 to
'1'.