Oki MC160MFP Maintenance Manual page 194

Oki Data CONFIDENTIAL
19.1.9 Void areas, white spots
20.1.9 Void areas, white spots
A. Typical faulty images
void areas
B. Troubleshooting procedure
Step Section Check item
Are there scratches or lines evi-
1 dent on the photo conductor sur-
face?
2 Is the outside dirty?
Is the transfer belt dirty with fin-
3
Imaging gerprints or oil?
cartridge
Is the transfer belt dirty or
4
scratched?
Is the ground terminal connected
5
properly?
2nd transfer Is the 2nd transfer roller dirty or
6
roller scratched?
Is there a foreign object in the
7
media path?
Media path
Is the fusing entrance guide plate
8
dirty or scratched?
Have steps 1 to 8 eliminated the
9
problem?
44292401TH Rev.1
white spots
A0CRF4C511DA
Result Action
YES Replace the imaging cartridge.
YES Clean.
YES Clean.
Wipe the surface clean of dirt with
a soft cloth.
YES
Replace the scratched transfer
belt with a new imaging cartridge.
NO Correct.
YES Replace the 2nd transfer roller.
YES Remove the foreign object.
YES Clean or replace.
NO Replace the toner cartridge.
19.1.10 Colored spots
20.1.10 Colored spots
A. Typical faulty images
colored spots
B. Troubleshooting procedure
Step Section Check item
1 Are the spots in a single color?
Are there scratches or lines evi-
2 dent on the photo conductor sur-
face?
Imaging
Is the Transfer Belt dirty with fin-
3
cartridge
gerprints or oil?
Is the transfer belt dirty or
4
scratched?
2nd transfer Is the 2nd transfer roller dirty or
5
roller scratched?
Is there a foreign object in the
6 Media path
media path?
Is the fusing roller dirty or
7 Fuser unit
scratched?
Have steps 1 to 7 eliminated the
8
problem?
TROUBLESHOOTING
A0CRF4C512DA
Result Action
NO Replace the imaging cartridge.
YES Replace the imaging cartridge.
YES Clean.
Wipe the surface clean of dirt with
a soft cloth.
YES
Replace the scratched transfer
belt with a new imaging cartridge.
YES Replace the 2nd transfer roller.
YES Remove the foreign object.
YES Replace the fuser unit.
NO Replace the toner cartridge.
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