Printer Monocolor: White Lines, White Bands, Colored Lines And Colored Bands In Main Scan Direction - Konica Minolta d-Color MF3000 PF-P08 Service Manual

16. IMAGE QUALITY PROBLEM
16.2.13 Printer monocolor: white lines, white bands, colored lines and colored
bands in main scan direction
A. Typical faulty images
White lines
B. Troubleshooting procedure
Step Section
1 Image check A white line or black line in main
scan direction is sharp.
2 Imaging unit The surface of the PC drum is
scratched.
3 Dirty on the outside.
4 Contact terminals make good con-
nection between each imaging unit
and machine.
5 Developing bias contact terminal
makes good connection.
6 PH unit The surface of the PH window is
dirty.
7 The problem has been eliminated
through the checks of steps up to 6.
236
White bands Colored lines
Check item Result
YES Change imaging unit.
YES Clean.
YES Clean with cleaning jig.
Field Service Ver. 1.1 Jun. 2010
Colored bands
Action
NO Clean the electrostatic charger wire.
NO Clean contact terminals.
NO Clean contact terminal and check ter-
minal position.
NO Change transfer belt unit.
Change PH unit.
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