Oki MC160MFP, Maintenance Manual

Page: 191 / 207

44292401TH Rev.1
190 /
Oki Data CONFIDENTIAL
TROUBLESHOOTING
19.1.3 Uneven density in sub scan direction
20.1.3 Uneven density in sub scan direction
A. Typical faulty images
B. Troubleshooting procedure
A0CRF4C505DA
Step Section Check item Result Action
1
Imaging
cartridge
Are there scratches or lines evi-
dent on the photo conductor sur-
face?
YES Replace the imaging cartridge.
2 Is the outside dirty? YES Clean.
3
Is the transfer belt dirty or
scratched?
YES
Wipe the surface clean of dirt with
a soft cloth.
Replace the scratched transfer
belt with a new imaging cartridge.
4 Is the terminal dirty? YES Clean.
5 PH unit Is the window surface dirty? YES Clean.
6
2nd transfer
roller
Is the 2nd transfer roller dirty or
scratched?
YES Replace the 2nd transfer roller.
7
Have steps 1 to 6 eliminated the
problem?
NO
Replace the toner cartridge.
o
Replace the PH Unit.
o
Replace high voltage unit.
19.1.4 Uneven density in main scan direction
20.1.4 Uneven density in main scan direction
A. Typical faulty images
B. Troubleshooting procedure
A0CRF4C506DA
Step Section Check item Result Action
1
Imaging
cartridge
Are there scratches or lines evi-
dent on the photo conductor sur-
face?
YES Replace the imaging cartridge.
2 Is the outside dirty? YES Clean.
3
Is the transfer belt dirty with fin-
gerprints or oil?
YES Clean.
4
Is the transfer belt dirty or
scratched?
YES
Wipe the surface clean of dirt with
a soft cloth.
Replace the scratched transfer
belt with a new imaging cartridge.
5 Is the terminal dirty? YES Clean.
6
2nd transfer
roller
Is the 2nd transfer roller dirty or
scratched?
YES Replace the 2nd transfer roller.
7
Have steps 1 to 6 eliminated the
problem?
NO
Replace the toner cartridge.
o
Replace high voltage unit.