Colored Spots - Konica Minolta magicolor 1680MF Service Manual

20. Image quality problems
20.1.10

Colored spots

A. Typical faulty images
B. Troubleshooting procedure
Step Section
1
2
Imaging
3
cartridge
4
2nd transfer
5
roller
6 Media path
7 Fuser unit
8
268
colored spots
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
media path?
Is the fusing roller dirty or
scratched?
Have steps 1 to 7 eliminated the
problem?
Field Service Ver. 1.0 Nov. 2008
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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