Colored Spots - Konica Minolta magicolor 2490MF Service Manual

17. Miscellaneous errors
17.2.17

Colored spots

A. Typical faulty images
B. Troubleshooting procedure
Step Section
1
Drum cartridge
2
3
4 Transfer belt unit
5
6 Paper path
7 Fusing unit
8 -
266
Colored spots
AA AA
Check Item
Are the spots in a single color?
Are there scratches or lines evi-
dent on the photo conductor sur-
face?
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
paper path?
Is the fusing roller dirty or
scratched?
The problem has been eliminated
after performing step 7.
Field Service Ver. 1.0 Jul. 2006
4036fs4052c0
Result
NO Replace the drum cartridge.
YES Replace the drum cartridge.
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.
YES Replace the fusing unit.
NO Replace the toner cartridge.
Action