4-Color: Low Image Density - Konica Minolta magicolor 7450 Service Manual

16. Image quality problem
16.3.17

4-Color: low image density

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
232
ABCDE
ABCDE
ABCDE
ABCDE
ABCDE
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.
Field Service Ver. 1.0 May 2006
4036fs4036c0
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