Toshiba e-STUDIO160 Service Handbook page 188

(8) Black banding (at right angles to feeding direction)
Step Cause/Defect area
1 Process unit
(main charger)
2
3 Process unit (Drum)
4 Fuser unit
5 HVPS (main charger/trans-
fer charger)
6
e-STUDIO160/200/250 TROUBLESHOOTING
Check items
Main charger wire dirty or de-
formed?
Charger wire terminals/grid termi-
nals (process unit) and corre-
sponding terminals (main body)
stained?
Deep scratch on drum surface?
Dirt or scratches on heat roller
surface?
High-voltage output defective?
If problem persists after measures
are applied, or there is no prob-
lem found in above check, follow
procedure described in right col-
umn.
4 - 66
Measures
Clean main charger wire, replace process unit
or charger wire.
Clean terminals.
Replace process unit or drum.
Clean or replace heat roller?
Adjust output from HVPS, or replace defec-
tive HVPS.
Replace process unit or fuser unit.
December 2002 TOSHIBA TEC