Konica Minolta bizhub C360 Service Manual page 793

23. IMAGE QUALITY PROBLEM
23.3.32 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 Image Process
Adjustment
→ Gradation
Adjust
(Service Mode)
7 Image Process
Adjustment
→ Max Image
2.1
Density Adj
(Service Mode)
8 Image Process
Adjustment
→ Stabilizer →
Reset + Stabi-
lizer
(Service Mode)
9
738
2.1
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.
"Conv. Value" falls within the
specified range as checked through
gradation adjust.
Dark: 0 ± 100
Highlight: 0 ± 60
The problem has been eliminated
through the adjust of Max Image
Density.
After the Reset + Stabilizer
sequence has been completed, run
gradation adjust.
The problem has been eliminated
through the checks of steps up to 8.
Field Service Ver. 2.1 Feb. 2012
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 image stabilization.
YES Go to step 9.
NO Go to next step.
NO Go to next step.
NO Change transfer belt unit.
→ Change printer control board
→ Change high voltage unit.
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