Uneven Density In Cd - Konica Minolta magicolor 2590MF Service Manual

17. Miscellaneous errors
17.2.11

Uneven density in CD

A. Typical faulty images
B. Troubleshooting procedure
Step Section
1
Drum cartridge
2
3
4
Transfer belt unit
5
6
7
8 -
266
4036fs4046c0
Check Item
Are there scratches or lines evi-
dent on the photo conductor sur-
face?
Is the outside dirty?
Is the contact on the rail of the
transfer belt unit in good contact
with the mating part?
Is the transfer belt dirty with fin-
gerprints or oil?
Is the transfer belt dirty or
scratched?
Is the terminal dirty?
Is the 2nd transfer roller dirty or
scratched?
The problem has been eliminated
after performing step 7.
Field Service Ver. 1.0 Aug. 2007
4036fs4047c0
Result Action
YES Replace the drum cartridge.
YES Clean.
NO Check or correct contact.
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 Clean.
YES Replace the 2nd transfer roller.
Replace the toner cartridge.
NO
→ Replace the hight voltage unit.