EPSON AcuLaser C9200N Revision D
Troubleshooting Image quality problem 139
Confidential
3.5.3 Solution
<MONOCOLOR>
WHITE LINES IN SUB SCAN DIRECTION, WHITE BANDS IN SUB SCAN
DIRECTION, COLORED LINES COLORED BANDS IN SUB SCAN
DIRECTION
A. Typical Faulty Images
B. Troubleshooting Procedure
<MONOCOLOR>
WHITE LINES IN MAIN SCAN DIRECTION, WHITE BANDS IN MAIN
SCAN DIRECTION, COLORED LINES IN MAIN SCAN DIRECTION,
COLORED BANDS IN MAIN SCAN DIRECTION
A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section Check Item Result Action
1 Photoconductor
Unit
The surface of the PC
Drum is scratched.
YES Change Photoconductor Unit.
2 Dirty on the outside. YES Clean.
3 Contact terminals make
good connection between
each PU and machine.
NO Clean contact terminals.
4 Developing bias contact
terminal makes good
connection.
NO Clean contact terminal and
check terminal position.
5 PH Unit The surface of the PH
Window is dirty.
YES Clean with cleaning jig.
6 The problem has been
eliminated through the
checks of steps up to 5.
NO Change Photoconductor Unit.
→ Change Transfer Belt.
(p.162)
→ Change PH Unit. (p.175)
Step Section Check Item Result Action
1 Photoconductor
Unit
The surface of the PC
Drum is scratched.
YES Change Photoconductor Unit.
2 Dirty on the outside. YES Clean.
3 Contact terminals make
good connection between
each PU and machine.
NO Clean contact terminals.
4 Developing bias contact
terminal makes good
connection.
NO Clean contact terminal and
check terminal position.
5 PH Unit The surface of the PH
Window is dirty.
YES Clean with cleaning jig.
6 The problem has been
eliminated through the
checks of steps up to 5.
NO Change Photoconductor Unit.
→ Change Transfer Belt.
(p.162)
→ Change PH Unit. (p.175)
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