White Lines In Cd, White Bands In Cd, Colored Lines In Cd, And Colored Bands In Cd - Konica Minolta bizhub C30P Service Manual

16. Image quality problems
16.1.2 White lines in CD, white bands in CD, colored lines in CD, and colored
bands in CD
A. Typical faulty images
white lines in CD
4036fs4025c0
B. Troubleshooting procedure
Step Section
1
2
Print unit
3
4
5
Transfer belt
6
7 Media path
8
Fusing unit
9
10
202
white bands in CD
4036fs4026c0
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 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
9?
Field Service Ver. 2.0 May 2007
colored lines in CD
4036fs4027c0
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.
Wipe the surface clean of dirt with
a soft cloth.
YES
Change a scratched transfer belt
for a transfer belt.
YES Change the Transfer Roller.
YES Remove the foreign matter.
YES Clean.
YES Change the fusing unit.
Change the DC power supply.
NO
Change the transfer belt.
colored bands in CD
4036fs4028c0
Action