19. Image quality problem
Field Service Ver. 1.0 Jun. 2008
362
T
roubleshooting
19.3.39
Printer 4-color: uneven image
A. Typical faulty images
B. Troubleshooting procedure
A02EF4C525DA
Step
Section
Check item
Result
Action
1
Toner cartridge
The toner cartridge of every color
is surely installed.
NO
Re-install it.
2
PH unit
The PH unit is surely installed.
NO
Re-install it.
3
Toner cartridge
There is any stain or breakage on
the drive section of the toner car-
tridge.
YES
Clean/replace the toner cartridge.
4
Imaging unit
There is any stain, damage or
abrasion on the PC drum.
YES
Replace the imaging unit.
5
Transfer roller unit There is any stain, damage,
deformation or abrasion on the
transfer roller.
YES
Replace the transfer roller unit.
6
Fusing unit
There is any stain, damage,
deformation or abrasion on the
roller and drive section of the fus-
ing unit.
YES
Replace the fusing unit.
7
The problem has been eliminated
through the check of step 6.
NO
Replace the transfer belt unit.
d-Color MF201
Service Manual Y109660-1