Canon PC920 Service Manual page 320

7 The copy is foggy vertically.
8 The copy has black lines. (vertical, fuzzy, thick)
9 The copy has black lines. (vertical, fine)
Cause Step
Scanner 1
Transfer 2
guide assem-
bly
Cartridge 3
10 The copy has white spots. (vertical)
11 The copy has white lines. (vertical)
Cause Step
Fixing 1
assembly
Cartridge 2
Static elimi- 3
nator
Transfer 4
charging
roller
Cartridge
COPYRIGHT © 1999 CANON INC.
Checks
Clean the scanning lamp, reflecting
plate, lens, and mirror. Is the problem
corrected?
Clean the transfer guide assembly. Is
the problem corrected?
Take out and then set the cartridge
once again. Is the problem corrected?
Checks
Turn off the power in the middle of a
copying run, and open the machine's
top unit. Does the copy image before
moving through the fixing assembly
have white spots or white lines?
Shake the cartridge several times. Is
the problem corrected?
Clean the static eliminator. Is the
problem corrected?
Is there foreign matter or scratches in
the transfer charging roller assembly?
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 11 TROUBLESHOOTING
YES/NO
YES End.
YES End.
YES End.
NO Replace the cartridge.
YES/NO
YES Check the fixing
assembly.
YES Inform the user that
the cartridge is run-
ning out of toner.
YES End.
YES Remove the foreign
matter, or replace the
transfer charging
roller.
NO Replace the cartridge.
Action
Action
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