16. Image Quality Problems; 16.1 Solution; White Lines In Fd, White Bands In Fd, Colored Lines In Fd, And Colored Bands In Fd - Konica Minolta bizhub C30P Service Manual

Field Service Ver. 2.0 May 2007

16. Image quality problems

16.1 Solution

16.1.1 White lines in FD, white bands in FD, colored lines in FD, and colored
bands in FD
A. Typical faulty images
white lines in FD
4036fs4021c0
B. Troubleshooting procedure
Step Section
1
2
Print unit
3
4
5 PH unit
6
7 Transfer belt
8
9 Media path
10
Fusing unit
11
12
white bands in FD
4036fs4022c0
Check item
Are there scratches or lines evi-
dent on photo conductor surface?
Is the outside dirty?
Is the connector or contact termi-
nal between each print unit and
PH unit connected properly?
Is the developing bias contact ter-
minal in good contact?
Is the window surface dirty?
Is the transfer belt dirty with fin-
gerprints or oil?
Is the transfer belt dirty or
scratched?
Is the transfer roller dirty or
scratched?
Is there a foreign matter on the
media path?
Is the fusing entrance guide plate
dirty or scratched?
Is the separator fingers dirty?
Has the problem been eliminated
through the checks of steps up to
11?
16. Image quality problems
colored lines in FD colored bands in FD
4036fs4023c0
Result
YES Change the print unit.
YES Clean.
Clean the contact terminal or
NO
reconnect the connector.
Clean the contact terminal or
NO
check the terminal position.
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 Change the transfer roller.
YES Remove foreign matter.
Clean.
YES
Change the fusing unit.
YES Change the fusing unit.
Change the transfer belt.
NO
Change the PH unit.
4036fs4024c0
Action
201