Oki MC160MFP Maintenance Manual page 190

Oki Data CONFIDENTIAL
20. Image quality problems
20. Image quality problems
19. Image quality problems
20.1 Printer system
20.1 Printer system
19.1 Print system
NOTE
NOTE
• Typical faulty image samples shown in the following are all printed with A4S setting.
• Typical faulty image samples shown in the following are all printed with A4S setting.
20.1.1 White lines/bands, colored lines/bands in sub scan direction
19.1.1 White lines/bands, colored lines/bands in sub scan direction
20.1.1 White lines/bands, colored lines/bands in sub scan direction
A. Typical faulty images
A. Typical faulty images
white bands in
white lines in
white lines in white bands in
sub scan direction sub scan direction
sub scan direction sub scan direction
B. Troubleshooting procedure
B. Troubleshooting procedure
Step Section Check item
Step Section Check item
Are there scratches or lines evi-
Are there scratches or lines evi-
1 dent on the photo conductor sur-
1 dent on the photo conductor sur-
face?
face?
2 Is the outside dirty?
2 Is the outside dirty?
Is the connector or contact termi-
Is the connector or contact termi-
3 nal of the imaging cartridge con-
Imaging
3 nal of the imaging cartridge con-
nected properly?
Imaging
cartridge
nected properly?
cartridge Is the transfer belt dirty with fin-
4
Is the transfer belt dirty with fin-
gerprints or oil?
4
gerprints or oil?
Is the transfer belt dirty or
5
Is the transfer belt dirty or
scratched?
5
scratched?
Is the connector or contact termi-
Is the connector or contact termi-
6 nal of the PH unit connected
PH unit
6 nal of the PH unit connected
properly?
PH unit
properly?
7 Is the window surface dirty?
7 Is the window surface dirty?
2nd transfer Is the 2nd transfer roller dirty or
8
2nd transfer Is the 2nd transfer roller dirty or
roller scratched?
8
roller scratched?
Is there a foreign object in the
9 Media path
Is there a foreign object in the
media path?
9 Media path
media path?
Is the fusing entrance guide plate
10 Fuser unit
Is the fusing entrance guide plate
dirty or scratched?
10 Fuser unit
dirty or scratched?
Have steps 1 to10 eliminated the
11
Have steps 1 to10 eliminated the
problem?
11
problem?
44292401TH Rev.1
colored lines in colored bands in
colored lines in colored bands in
sub scan direction sub scan direction
sub scan direction sub scan direction
A0CRF4C503DA
A0CRF4C503DA
Result Action
Result Action
YES Replace the imaging cartridge.
YES Replace the imaging cartridge.
YES Clean.
YES Clean.
NO Clean the contact terminal.
NO Clean the contact terminal.
YES Clean.
YES Clean.
Wipe the surface clean of dirt with
Wipe the surface clean of dirt with
a soft cloth.
YES
a soft cloth.
Replace the scratched transfer
YES
Replace the scratched transfer
belt with a new imaging cartridge.
belt with a new imaging cartridge.
Clean the contact terminal or
NO
Clean the contact terminal or
reconnect the connector.
NO
reconnect the connector.
YES Clean.
YES Clean.
YES Replace the 2nd transfer roller.
YES Replace the 2nd transfer roller.
YES Remove the foreign object.
YES Remove the foreign object.
Clean.
YES
Clean.
Replace the fuser unit.
YES
Replace the fuser unit.
Replace the toner cartridge.
NO
Replace the toner cartridge.
Replace the PH unit.
NO
Replace the PH unit.
19.1.2 White lines/bands, colored lines/bands in main scan direction
20.1.2 White lines/bands, colored lines/bands in main scan direction
A. Typical faulty images
white bands in
white lines in
main scan direction
main scan direction
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 connector or contact termi-
Imaging
3 nal of the imaging cartridge con-
cartridge
nected properly?
Is the transfer belt dirty or
4
scratched?
Is the developing bias contact ter-
5 Toner cartridge
minal in good contact?
Is the connector or contact termi-
6 PH unit nal of the PH unit connected
properly?
2nd transfer Is the 2nd transfer roller dirty or
7
roller scratched?
Is there a foreign object in the
8
Media path
media path?
Is the fusing entrance guide plate
9 Fuser unit
dirty or scratched?
Have steps 1 to 9 eliminated the
10
problem?
TROUBLESHOOTING
colored lines in colored bands in
main scan direction main scan direction
A0CRF4C504DA
Result Action
YES Replace the imaging cartridge.
YES Clean.
NO Clean the contact terminal.
Wipe the surface clean of dirt with
a soft cloth.
YES
Replace the scratched transfer
belt with a new imaging cartridge.
Clean the contact terminal or
NO
check the terminal position.
Clean the contact terminal or
NO
reconnect the connector.
YES Replace the 2nd transfer roller.
YES Remove the foreign object.
YES Clean.
NO Replace the DC power supply.
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