COPYRIGHT © 1999 CANON INC. CANON imageRUNNER 400/330 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
14-51
CHAPTER 14 TROUBLESHOOTING
Cause
Scanning lamp
Drum cartridge
Wiring
Developing
assembly
Scanning system
Feeding system
Action
Go to step 5.
If the scanning lamp
is blackened, replace
the lamp.
Check the power
supply voltage.
Replace the drum
cartridge.
Correct the wiring.
Check the developing
bias.
Check the scanning
system.
Check the feeding
system.
Step
1
2
3
4
5
6
Yes/No
YES
YES
YES
NO
NO
YES
NO
Check
Is the problem noted at the same
location on all copies made in
Direct?
Does the scanning lamp flicker
while moving forward?
Is the problem noted at intervals of
94 mm?
Is the wiring from the scanning
lamp to the composite power
supply PCB and to the power
supply normal?
Is the coating of toner on the
surface of the developing cylinder
normal?
Make a copy in Reduce. Is the
problem noted at a location
different from that on a copy made
is Direct?
19 The copy has horizontal fogging.