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

bizhub C350 Field Service Ver. 2.0 April 2004
4.3.32

Printer 4-Color: poor color reproduction

A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section
Paper Paper is damp.
1
Terminal is dirty.
Image Transfer
2
Belt Unit
Image Transfer Image Transfer Roller is
3
Roller Unit
installed properly.
Image Transfer Roller is dirty
4
or scratched.
AIDC Sensor Sensor is dirty.
5
Gradation Adjust "Conv. Value" falls within the speci-
(Tech. Rep. fied range as checked through Gra-
6 Mode) dation Adjust.
Max: 0 ± 100
Highlight = 0 ± 60
Image Adjust The problem has been eliminated
→ PRT Max
through the adjust of PRT Max.
7
Density (Tech.
Rep.Mode)
Image Adjust The problem has been eliminated
→ PRT Highlight
through the adjust of PRT Highlight.
8
(Tech. Rep.
Mode)
Image Adjust After the Reset + Stabilizer
→ Stabilizer →
sequence has been completed, run
9 Reset + Stabi- Gradation Adjust; if the problem
lizer (Tech. Rep. persists, make adjustments of PRT
Mode) Max Density and PRT Highlight.
4036fs4058c0
Check Item Result
4-91
Image quality problem
Action
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.