Toshiba e-Studio250, e-Studio200, e-Studio160 manual Minals main body stained? Transfer charger unit

(6) White banding (at right angles to feeding direction)

Feeding direction

Step	Cause/Defect area	Check items	Measures
1	Process unit (developer)	Developing bias terminals (pro-	Clean terminals.
		cess unit) and corresponding ter-
		minals (main body) stained?
2	Transfer charger unit	Transfer charger unit securely in-	Re-install transfer charger unit securely.
		stalled?
3		Transfer charger wire terminals	Clean terminals.
		and corresponding terminals
		stained?
4		Is guide roller stained or rotating	Clean guide roller.
		improperly?	Ground shaft properly.
		Guide roller stained or rotating	When guide roller rotates improperly, replace
		improperly? Guide roller shaft	transfer charger unit.
		grouded improperly?
5	Process unit (drum)	Any abnormalities on drum sur-	Replace process unit or drum.
		face?
6	Fuser unit	Toner on heat roller surface?	Clean heat roller. If problem persists, replace
		Scratches on heat roller surface?	heat roller.
7	Gear and roller	Check each gear or roller for pa-	Replace defective gear or roller.
		per feed and transport is dam-
		aged?
8	HVPS (main charger,	High-voltage output defective?	Adjust output from HVPS, or replace defec-
	transfer charger and		tive HVPS.
	developer bias)
9		If problem persists after measures	Replace process unit or transfer charger unit.
		are applied, or there is no prob-
		lem found in above check, follow
		procedure described in right col-
		umn.

e-STUDIO160/200/250 TROUBLESHOOTING 4 - 64 December 2002 TOSHIBA TEC