Field Service Ver. 1.0 May 2006
16. Image quality problem
235
magicolor 7450
T
roubleshooting
16.3.20
4-Color: void areas, white spots
A. Typical Faulty Images
B. Troubleshooting Procedure
Void areas
White spots
4036fs4050c0
4036fs4051c0
Step
Section
Check Item
Result
Action
1
Image Check
There are void areas at the front
side or high density section.
YES
2
There are void areas in the trailing
edge.
YES
Perform [TRANSFER POWER]/
[1'ST TRANSFER] under Ser-
vice Menu.
3
Transfer Belt
Fingerprints, oil, or other foreign
matter is evident on the Transfer
Belt.
YES
Clean with specified solvent.
(See Maintenance.)
4
Transfer Belt is dirty or scratched.
YES
Clean dirty belt with a soft cloth.
Change Transfer Belt belt is
damaged.
5
Transfer Roller
Transfer Roller is dirty or scratched.
YES
Change Image Transfer Roller.
6
Charge Neutralizing Cloth is not
separated and ground terminal is
connected properly.
NO
Correct or change.
7
Paper path
There is foreign matter on paper
path.
YES
Remove foreign matter.
8
Pre-Image Transfer Guide Plate is
damaged or dirty.
YES
Clean or change.
9
The problem has been eliminated
through the checks of steps up to 8.
NO
Change Transfer Belt.
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 ...