Konica Minolta Magicolor 5440 DL - Manual (Page 220)

Main Unit Field Service Image Quality Problems
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5. Image Quality Problems
5.1 Solutions
5.1.1 White lines in FD, white bands in FD, colored lines in FD, and colored
bands in FD
A. Typical Faulty Images
B. Troubleshooting Procedure
White lines in FD White bands in FD Colored lines in FD Colored bands in FD
4036fs4021c0 4036fs4022c0 4036fs4023c0 4036fs4024c0
Step Section Check Item Result Action
1
Toner Cartridge
Are there scratches or lines evi-
dent on photo conductor surface?
YES Change the Toner Cartridge.
2 Is the outside dirty? YES Clean.
3
Is the connector or contact termi-
nal between each Toner Car-
tridge and PH Unit connected
properly?
NO
Clean the contact terminal or
reconnect the connector.
4
Is the developing bias contact ter-
minal in good contact?
NO
Clean the contact terminal or
check the terminal position.
5 PH Unit Is the window surface dirty? YES Clean.
6
Transfer Belt Unit
Is the Transfer Belt dirty with fin-
gerprints or oil?
YES Clean.
7
Is the Transfer Belt dirty or
scratched?
YES
Wipe the surface clean of dirt with
a soft cloth. Change a scratched
Transfer Belt for a Transfer Belt
Unit.
8
Is the Transfer Roller dirty or
scratched?
YES Change the Transfer Roller.
9 Media path
Is there a foreign matter on the
media path?
YES Remove foreign matter.
10
Fusing Unit
Is the Fusing Entrance Guide
Plate dirty or scratched?
YES
Clean.
Change the Fusing Unit.
11 Is the Separator Fingers dirty? YES Change the Fusing Unit.
12
Has the problem been eliminated
through the checks of steps up to
11?
NO
Change the Toner Cartridge.
→ Change the Transfer Belt Unit.
→ Change the PH Unit.
→ Change the Fusing Unit.
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