Printer 4-Color: Poor Color Reproduction - Konica Minolta bizhub C25 Service Manual

Field Service Ver. 1.1 May 2011
22.2.29

Printer 4-color: poor color reproduction

A. Typical faulty images
B. Troubleshooting procedure
Step Section
1 Paper
2 Transfer belt unit Terminal is dirty.
3 Transfer roller
unit
4
5 IDC sensor
6
Check item
Paper is damp.
Transfer roller is installed properly.
Charge neutralizing needle is not
separated and ground terminal is
connected properly.
Sensor is dirty.
The problem has been eliminated
through the checks of steps up to 5.
22. IMAGE QUALITY PROBLEM
Result Action
YES Change paper to one just
unwrapped from its package.
YES Clean.
NO Reinstall.
NO Correct or change.
YES Clean IDC sensor and execute
the calibration.
NO Change transfer belt unit.
 Change printer control board.
 Change high voltage unit.
 Change MFP board/2.
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