Gradation Reproduction Failure - Konica Minolta magicolor 2400W Service Manual

20. Image Quality Problems
20.1.6

Gradation reproduction failure

A. Typical faulty images
B. Troubleshooting procedure
Step Section
1 Drum Cartridge Is the outside dirty?
2 PH Unit
3 AIDC Sensor
4
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Check Item
Is the window surface dirty?
Is the sensor dirty?
Have steps 1-3 eliminated the
problem?
Field Service Ver. 4.0 Feb. 2006
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Result Action
YES Clean.
YES Clean.
YES Clean.
Replace the Toner Cartridge.
→ Replace the PH Unit.
NO
→ Replace the AIDC Sensor.
→ Replace the High Voltage Unit.