4-Color: Poor Color Reproduction - Konica Minolta magicolor 7450 Service Manual

Field Service Ver. 1.0 May 2006
16.3.18

4-Color: poor color reproduction

A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section
Paper
1
2 Transfer Belt
3 Transfer Roller
4
5 IDC Sensor
[SERVICE
MENU]
→[ALIGNMENT]
6
→ [MAXIMUM
DENSITY]
7
Check Item
Paper is damp.
Terminal is dirty.
Transfer Roller is installed properly.
Transfer Roller is dirty or scratched.
Sensor is dirty.
The problem has been eliminated
through the adjust of MAXIMUM
DENSITY.
The problem has been eliminated
through the checks of steps up to 6.
16. Image quality problem
4036fs4058c0
Result
YES Change paper to one just
unwrapped from its package.
Install Paper Dehumidifying
Heater.
YES Clean.
NO Reinstall.
NO Change Transfer Roller.
YES Clean with blower brush.
NO Go to next step.
NO Change Transfer Belt.
→ Change Controller Board
→ Change High Voltage Unit
(Image Transfer, Neutralizing).
Action
233