Image Problem; Troubleshooting Procedure By A Particular Image Quality Problem; Ir System: White Lines In Fd, White Bands In Fd, Colored Lines In Fd, And Colored Bands In Fd - Minolta magicolor 7300 Service Manual

FrameMaker Ver.6E (PC) magicolor 7300 TROUBLESHOOTING
02.08.08
6.

IMAGE PROBLEM

6-1. Troubleshooting Procedure by a Particular Image Quality
Problem
(1) IR System: white lines in FD, white bands in FD, colored lines in FD, and col-
ored bands in FD
White lines in
4011T015AA
<Troubleshooting Procedure>
Section Step
PU 1 The surface of the PC
Drum is scratched.
2 Dirty on the outside.
3 Connectors and contact
terminals make good
connection between each
color PU and PH Unit.
4 Developing bias contact
terminal makes good
connection.
PH Unit 5 The surface of the window
is dirty.
Transfer 6 Fingerprints, oil, or other
Belt Unit foreign matter is evident on
the Image Transfer Belt.
7 Image Transfer Belt is dirty
or scratched.
8 Image Transfer Roller is
dirty or scratched.
Paper path 9 There is foreign matter on
paper path.
<Typical Faulty Images>
White bands Colored lines
4011T017AA
4011T020AA
Check Item Result
YES Change PU.
YES Clean.
NO
NO
YES Clean.
YES Clean with specified solvent.
YES Clean dirty belt with a soft cloth.
YES Change the Transfer Belt Unit.
YES Remove foreign matter.
T-42
Colored
4011T023AA
Action
Clean contact terminals.
Reconnect.
Clean contact terminal and check
terminal position.
D-32DISASSEMBLY/REAS-
SEMBLY
D-31DISASSEMBLY/REAS-
SEMBLY
Change Transfer Belt Unit if belt
is damaged.