Konica Minolta bizhub C360 Service Manual page 774

Field Service Ver. 2.1 Feb. 2012
23.3.15 Printer monocolor: white lines, white bands, colored lines and colored
bands in sub scan direction
A. Typical faulty images
White lines
B. Troubleshooting procedure
Step Section
1 Image check A white line or black line in sub
scan direction is sharp.
2 When printing thick paper, black
lines appear.
3 Drum unit/ The surface of the PC drum is
developing scratched.
unit
4 Dirty on the outside.
5 Contact terminals make good con-
nection between each drum unit
and machine.
6 Developing bias contact terminal
makes good connection.
7 PH unit The surface of the PH window is
dirty.
8 The problem has been eliminated
through the checks of steps up to 7.
White bands Colored lines
Check item Result
YES Clean the electrostatic charger wire.
YES Select [Service Mode] → [Machine]
YES Change drum unit.
YES Clean.
YES Clean with cleaning jig.
23. IMAGE QUALITY PROBLEM
Colored bands
Action
→ [Thick Paper Mode] and set
[Image Quality].
NO Clean contact terminals.
NO Clean contact terminal and check ter-
minal position.
NO Change developing unit.
→ Change image transfer belt unit.
→ Change PH unit.
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