The Copy Is Blank - Canon 1130 Service Manual

Cause
ADJUST>HV-
SP>HV-SP
Toner (excess
amount)
14

The copy is blank.

Cause
-------------
Potential control
fault
Transfer charging
assembly
Developing
assembly (faulty
locking)
Developing
cylinder clutch
Transfer high-
voltage
COPYRIGHT © 2002 CANON INC.
Step
2 Increase the setting of HV-SP in
ADJUST>HV-SP>HV-SP in
service mode. Is the problem
corrected?
3 Check the latent image formation
system and the developing system.
Is there a fault?
Step
1 Generate a horizontal stripe test
print (TYPE=10). Is the image
normal?
2 Execute FUNCTION>DPC>DPC
in service mode. Is the copy image
after execution normal?
3 Is the transfer blade locking lever
of the transfer charging assembly
in the locked position?
4 Is the transfer charging assembly
securely fitted?
5 Is the developing assembly locked
to the photosensitive drum during
development?
6 Is the developing cylinder rotating
during development?
7 Open the front right cover during
development, and remove the
photosensitive drum unit. Is the
image on the photosensitive drum
normal?
CANON CLC1100/1130/1150/1160/1180 REV.3 FEB. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
Checks
Checks
Yes/No Action
YES End.
Settings: -6 to 0
Unit: 50 µA
YES Correct the fault.
NO Decrease the copy
density using the Copy
Density key.
Yes/No Action
YES Check the wiring of the
following PCBs; if
normal, try replacement:
• analog processor PCB
• IP-MAIN PCB
• CCD unit
YES End.
NO Set the lever to the
locked position.
NO Fit the charging
assembly.
NO See IV. 47..
NO Check the developing
cylinder clutch.
YES • Check the transfer
high-voltage system.
• Check the high-
voltage cable from the
HVT PCB to the
transfer charging
assembly: if a fault is
found, replace the
high-voltage cable; if
normal, replace the
HVT-DC PCB.
NO • Check the developing
bias system.
• Try replacing the
developing bias PCB.
13-87