Uneven Density In Sub Scan Direction - Konica Minolta magicolor 4690MF Service Manual

Field Service Ver. 1.0 May 2008
19.1.3

Uneven density in sub scan direction

A. Typical faulty images
B. Troubleshooting procedure
Step Section
1
Imaging unit
2
3 PH unit
4
Transfer belt unit
5
6 Transfer roller
7
Check item
Are there scratches or lines evi-
dent on photo conductor surface?
Is the outside dirty?
Is the window surface dirty?
Is the transfer belt dirty or
scratched?
Is the terminal dirty?
Is the transfer roller dirty or
scratched?
Has the problem been eliminated
through the checks of steps up to
6?
19. Image quality problems
Result Action
YES Change the imaging unit.
YES Clean.
YES Clean.
Wipe the surface clean of dirt with
YES a soft cloth. Change a scratched
transfer belt for a transfer belt.
YES Clean.
YES Change the transfer roller.
Change the transfer belt unit.
Change the PH unit.
NO
Change the high voltage unit/1.
Change the high voltage unit/2.
A0CRF4C505DA
299