Uneven Density In Fd - Konica Minolta magicolor 2500W Service Manual

Field Service Ver. 1.0 Aug. 2006
19.1.3

Uneven density in FD

A. Typical faulty images
B. Troubleshooting procedure
Step Section
1
Drum cartridge
2
3 PH unit
4
Transfer belt unit
5
6
7
4036fs4043c0
Check item
Are there scratches or lines evi-
dent on the photo conductor sur-
face?
Is the outside dirty?
Is the window surface dirty?
Is the transfer belt dirty or
scratched?
Is the terminal dirty?
Is the 2nd transfer roller dirty or
scratched?
Have steps 1 to 6 eliminated the
problem?
19. Image quality problems
4036fs4044c0 4036fs4045c0
Result
YES Replace the drum cartridge.
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 Clean.
YES Replace the 2nd transfer roller.
Replace the toner cartridge.
→ Replace the PH Unit.
NO
→ Replace high voltage unit.
Action
163