Image Quality Problems; Solution; White Lines In Fd, White Bands In Fd, Colored Lines In Fd, And Colored Bands In Fd - Konica Minolta magicolor 2500W Service Manual

Field Service Ver. 1.0 Aug. 2006

19. Image quality problems

19.1 Solution

19.1.1 White lines in FD, white bands in FD, colored lines in FD, and colored
bands in FD
A. Typical faulty images
White lines in FD
4036fs4021c0
B. Troubleshooting procedure
Step Section
1
2 Drum cartridge
3
4
PH unit
5
6
7 Transfer belt unit
8
9 Media path
10
Fusing unit
11
12
White bands in FD
4036fs4022c0
Check item
Are there scratches or lines evi-
dent on the photo conductor sur-
face?
Is the outside dirty?
Is the connector or contact termi-
nal of the drum cartridge con-
nected properly?
Is the connector or contact termi-
nal of the PH unit connected
properly?
Is the window surface dirty?
Is the transfer belt dirty with fin-
gerprints or oil?
Is the transfer belt dirty or
scratched?
Is the 2nd transfer roller dirty or
scratched?
Is there a foreign object in the
media path?
Is the fusing entrance guide plate
dirty or scratched?
Is the separation claw dirty?
Have steps 1 to11 eliminated the
problem?
19. Image quality problems
Colored lines in FD
4036fs4023c0
Result
YES Replace the drum cartridge.
YES Clean.
Clean the contact terminal or
NO
reconnect the connector.
Clean the contact terminal or
NO
reconnect the connector.
YES Clean.
YES Clean.
Wipe the surface clean of dirt with
a soft cloth.
YES
Replace the scratched transfer
belt with a new transfer belt unit.
YES Replace the 2nd transfer roller.
YES Remove the foreign object.
Clean.
YES
Replace the fusing unit.
YES Replace the fusing unit.
Replace the toner cartridge.
NO
→ Replace the PH unit.
Colored bands in FD
4036fs4024c0
Action
161