16. Image quality problem
Field Service Ver. 1.0 May 2006
232
magicolor 7450
T
roubleshooting
16.3.17
4-Color: low image density
A. Typical Faulty Images
B. Troubleshooting Procedure
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Step
Section
Check Item
Result
Action
1
Paper
Paper is damp.
YES
Change paper to one just
unwrapped from its package.
Install Paper Dehumidifying
Heater.
2
Transfer Belt
Terminal is dirty.
YES
Clean.
3
Transfer Roller
Transfer Roller is installed properly.
NO
Reinstall.
4
Transfer Roller is dirty or scratched.
NO
Change Transfer Roller.
5
IDC Sensor
Sensor is dirty.
YES
Clean with blower brush.
6
[SERVICE
MENU]
→
[ALIGNMENT]
→
[MAXIMUM
DENSITY]
The problem has been eliminated
through the adjust of MAXIMUM
DENSITY.
NO
Go to next step.
7
The problem has been eliminated
through the checks of steps up to 6.
NO
Change Transfer Belt.
→
Change Controller Board
→
Change High Voltage Unit
(Image Transfer, Neutralizing).
Summary of Contents for magicolor 7450
Page 1: ...SERVICE MANUAL 2006 05 2006 05 Ver 1 0 Ver 1 0 FIELD SERVICE magicolor 7450 magicolor 7450 ...
Page 3: ...ii Blank Page ...
Page 26: ...SERVICE MANUAL 2006 05 Ver 1 0 FIELD SERVICE Main Unit magicolor 7450 magicolor 7450 ...
Page 43: ...2 Product specifications Field Service Ver 1 0 May 2006 6 magicolor 7450 General Blank Page ...
Page 288: ...SERVICE MANUAL 2006 05 Ver 1 0 FIELD SERVICE Lower Feeder Unit ...
Page 317: ...3 Other Field Service Ver 1 0 May 2006 26 Lower Feeder Unit Maintenance Blank Page ...
Page 328: ...SERVICE MANUAL 2006 05 Ver 1 0 FIELD SERVICE Duplex Option ...
Page 333: ...1 Product specifications Field Service Ver 1 0 May 2006 2 Duplex Option General Blank Page ...
Page 345: ...6 Jam Display Field Service Ver 1 0 May 2006 14 Duplex Option Troubleshooting Blank Page ...