Image Quality Problems; Solutions; White Lines In Fd, White Bands In Fd, Colored Lines In Fd, And Colored Bands In Fd - Konica Minolta magicolor 5430 DL Service Manual

Main Unit Field Service
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
White lines in FD White bands in FD
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B. Troubleshooting Procedure
Step Section
1
2
Toner Cartridge
3
4
5 PH Unit
6
7 Transfer Belt Unit
8
9 Media path
10
Fusing Unit
11
12
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Check Item
Are there scratches or lines evi-
dent on photo conductor surface?
Is the outside dirty?
Is the connector or contact termi-
nal between each Toner Car-
tridge and PH Unit connected
properly?
Is the developing bias contact ter-
minal in good contact?
Is the window surface dirty?
Is the Transfer Belt dirty with fin-
gerprints or oil?
Is the Transfer Belt dirty or
scratched?
Is the Transfer Roller dirty or
scratched?
Is there a foreign matter on the
media path?
Is the Fusing Entrance Guide
Plate dirty or scratched?
Is the Separator Fingers dirty?
Has the problem been eliminated
through the checks of steps up to
11?
4-33
Image Quality Problems
Colored lines in FD Colored bands in FD
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Result
YES Change the Toner Cartridge.
YES Clean.
Clean the contact terminal or
NO
reconnect the connector.
Clean the contact terminal or
NO
check the terminal position.
YES Clean.
YES Clean.
Wipe the surface clean of dirt with
a soft cloth. Change a scratched
YES
Transfer Belt for a Transfer Belt
Unit.
YES Change the Transfer Roller.
YES Remove foreign matter.
Clean.
YES
Change the Fusing Unit.
YES Change the Fusing Unit.
Change the Toner Cartridge.
→ Change the Transfer Belt Unit.
NO
→ Change the PH Unit.
→ Change the Fusing Unit.
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Action