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December 2002 TOSHIBA TEC 4 - 65 e-STUDIO160/200/250 TROUBLESHOOTING
(7) Black banding (in feeding direction)
Step
1
2
3
4
5
6
7
Cause/Defect area
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Process unit
(main charger)
Process unit (Drum)
Fuser unit
Measures
Clean slit, lens and mirrors.
Clean charger wire.
Remove foreign matter.
Clean grid, replace process unit or grid.
Replace process unit or drum.
Clean or replace heat roller?
Replace process unit or fuser unit.
Check items
Foreign matter in optical path?
Main charger wire stained?
Foreign matter on grid?
Grid dirty or deformed?
Scratches on drum surface?
Dirt or scratches on heat roller
surface?
If problem persists after measures
are applied, or there is no prob-
lem found in above check, follow
procedure described in right col-
umn.
Feeding direction