Toshiba DP1600 Service Handbook page 189

(7) Black banding (in feeding direction)
Step Cause/Defect area
1 Scanner
2 Process unit
3 (main charger)
4
5 Process unit (Drum)
6 Fuser unit
7
December 2000 © TOSHIBA TEC
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.
4 - 65
01/11
Measures
Clean slit, lens and mirrors.
Clean charger wire.
Remove foreign matter.
Clean grid, replace process unit or grid (SRU
type).
Replace process unit or drum (SRU type).
Clean or replace heat roller?
Replace process unit or fuser unit.
1600/2000/2500 TROUBLESHOOTING