Toshiba e-STUDIO160 Service Handbook page 203

(23) Jittering image
Step Cause/Defect area
1 _
2 Registration roller
3 Pinch roller
4 Heat roller
5 Process unit (Drum gear,
cleaner paddle drive gear,
toner recovery auger drive
gear)
6 Process unit (Drum)
7 Carriage operation
8
9
10
11 Scanner
12
13 Drum drive system
14 Main drive gear assembly
December 2002 TOSHIBA TEC
Check items
Toner image paper on drum nor-
mal?
Registration roller dirty?
Pinch roller spring out of place?
Heat roller rotation defective?
Foreign matter or toner on gears?
Large scratch on drum?
Slider sheet defective?
Any abnormalities on carriage
feet?
Tension of timing belt inappropri-
ate?
Carriage drive system malfunc-
tioning?
Mirror loosely mounted?
Wire and timing belt tension
proper?
Drum drive system malfunction-
ing?
Main drive gear assembly improp-
erly mounted?
4 - 81
Measures
If normal, perform step 2 to 4. Otherwise per-
form step 5 and after.
Clean roller surface with alcohol, or replace
roller.
Re-mount or replace spring.
Check heat roller drive system.
Replace gear or roller if necessary.
Clean gears.
Replace process unit or drum.
Replace slider sheet.
Replace feet.
Adjust the tension.
Check carriage drive system.
Fix mirror properly.
Re-install wire and timing belt with jig.
Clean or replace gears if they have stain or
scratches.
Re-install main drive gear assembly with jig.
e-STUDIO160/200/250 TROUBLESHOOTING