Canon GP160DF Service Manual page 256

CHAPTER 13 TROUBLESHOOTING
6 Soiled back
Cause Steps
Dirt in paper 1
feed path
Transfer guide 2
Static charge 3
eliminator
Re-charging 4
eliminator
Transfer charg- 5
ing roller
Registration 6
roller
Fixing assem- 7
bly inlet guide
7 Black Lines (thin vertical lines)
Cause Steps
Scanner 1
assembly
CCD unit 2
Cartridge (pho- 3
tosensitive
drum)
Primary charg- 4
ing roller
Dirty fixing 5
assembly inlet
guide
Fixing
assembly
13-22
Checks
Check the paper feed path. Is it
dirty?
Is there toner on the surface of the
transfer guide?
Is there toner on the static charge
eliminator?
Is there toner on the re-charging
eliminator
Is the dirt's cycle at an approximately
54mm pitch?
Is the dirt's cycle at an approximately
52mm pitch?
Is the trouble resolved when the fix-
ing assembly inlet guide is cleaned?
Checks
Make a test print following the direc-
tions on page 13-120. Is the output
image normal?
Is the trouble resolved when the
CCD unit is replaced?
Remove the cartridge and check the
surface of the photosensitive drum.
Are there scratches in the drum's
direction of rotation?
Is the trouble resolved when the car-
tridge is replaced?
Is the trouble resolved when the fix-
ing assembly inlet guide is cleaned?
COPYRIGHT © 1999 CANON INC.
Yes/No
YES
YES
YES
YES
YES
YES
YES
NO
Yes/No
YES
YES
YES
YES
YES
NO
CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Clean the paper feed
path.
Clean the transfer
guide.
Clean the static charge
eliminator.
Clean the re-charging
eliminator.
Clean the transfer
charging roller.
Clean the registration
roller.
End
Replace the fixing
assembly.
Action
Clean the copyboard
glass, mirrors 1 to 4
and the lens.
End
Replace the cartridge.
End
End
Replace the fixing
assembly.