Printer 4-Color: Poor Color Reproduction - Konica Minolta bizhub C350 Service Manual

bizhub C350 Field Service Ver2.0 Sep. 2004
4.3.32

Printer 4-Color: poor color reproduction

A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section
Paper
1
Image Transfer
2
Belt Unit
Image Transfer
3
Roller Unit
4
AIDC Sensor
5
Gradation Adjust
(Tech. Rep.
6 Mode)
Image Adjust
→ PRT Max
7
Density (Tech.
Rep.Mode)
Image Adjust
→ PRT Highlight
8
(Tech. Rep.
Mode)
Image Adjust
→ Stabilizer →
9 Reset + Stabi-
lizer (Tech. Rep.
Mode)
Check Item
Paper is damp.
Terminal is dirty.
Image Transfer Roller is
installed properly.
Image Transfer Roller is dirty
or scratched.
Sensor is dirty.
"Conv. Value" falls within the speci-
fied range as checked through Gra-
dation Adjust.
Max: 0 ± 100
Highlight = 0 ± 60
The problem has been eliminated
through the adjust of PRT Max.
The problem has been eliminated
through the adjust of PRT Highlight.
After the Reset + Stabilizer
sequence has been completed, run
Gradation Adjust; if the problem
persists, make adjustments of PRT
Max Density and PRT Highlight.
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 Image Transfer Roller
Unit.
YES Clean with blower brush.
YES Go to step 10.
NO Go to next step.
NO Go to next step.
NO Go to next step.
Action
4-91