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COPYRIGHT © 1999 CANON INC. CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
13-23
8
Vertical Fogging
Cause
Exposure sys-
tem
Cartridge
External light
Steps
1
2
Yes/No
YES
YES
NO
Action
Clean the copyboard
glass, mirrors 1 to 4
and the lens.
End
Check that no external
light is reaching the
photosensitive drum.
Checks
Make a test print following the direc-
tions on page 13-120. Is the output
image normal?
Is the trouble resolved when the car-
tridge is replaced?
9
Fuzzy Horizontal Black Lines
Cause
Connection
fault due to
poor contact of
the flat cable
Poor drum sen-
sitivity of the
developer cylin-
der drum
Fixing
assembly
Steps
1
2
Yes/No
YES
YES
NO
Action
Replace the cable.
End
Replace the fixing
assembly.
Checks
Is the flat cable connecting the
inverter PCB and the image proces-
sor PCB almost broken?
Is the trouble resolved when the car-
tridge is replaced?
10 Dirt
Cause
Copyboard
glass
Toner spillage
Fixing assem-
bly
Cartridge
Steps
1
2
3
Yes/No
YES
YES
YES
NO
Action
Clean the copyboard
glass.
Check if toner is spilling
from the cartridge.
Replace the fixing
assembly.
Replace the cartridge.
Checks
Make several copies consecutively.
Does the dirt always occur in the
same place?
Does the dirt occur at random?
Does the dirt’s cycle occur at an
approximately 75mm pitch?
Содержание GP160
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