White Lines In Cd, White Bands In Cd, Colored Lines In Cd, And Colored Bands In Cd - Minolta magicolor 7300 Service Manual

FrameMaker Ver.6E (PC) magicolor 7300 TROUBLESHOOTING
02.08.08
(2) white lines in CD, white bands in CD, colored lines in CD, and colored bands in
CD
White lines in
4011T016AA
<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
PU and PH Unit.
4 Developing bias contact
terminal makes good
connection.
Transfer 5 Image Transfer Belt is dirty
Belt Unit or scratched.
6 2nd Image Transfer Roller
is dirty or scratched.
Paper path 7 There is foreign matter on
paper path.
Fuser Unit 8 Fusing Entrance Guide
Plate is dirty or damaged.
9 Fusing Paper Separator
Fingers are dirty.
10 The problem has been
eliminated by checking up
to Step 9.
<Typical Faulty Images>
White bands Colored lines
4011T021AA 4011T018AA
Check Item Result
YES Change PU.
YES Clean.
NO
NO
YES Clean dirty belt with a soft cloth.
YES Replacing the Transfer Belt Unit.
YES Remove foreign matter.
YES Clean.
YES Replacing the Fuser Unit.
NO
T-44
Colored
4011T022AA
Action
Clean contact terminals.
Reconnect.
Clean contact terminal and check
terminal position.
Change Transfer Belt Unit if belt
is damaged.
D-31DISASSEMBLY/REAS-
SEMBLY
Replacing the Fuser Unit.
Change the PU.
Replacing the Transfer Belt Unit.
Replacing the Fuser Unit.