Toshiba e-STUDIO350 Service Handbook page 556

12) Black banding (in the feeding direction)
Defective area Step
Scanner 1
Shading correction 2
plate
Main charger grid 3
4
Main charger 5
6
7
8
Cleaner 9
10
11
Fuser unit 12
13
Drum 14
Laser optical unit 15
e-STUDIO350/352/353/450/452/453
TROUBLESHOOTING
Check items
Is there a foreign matter on the light
path?
Is there dust or stains on part of the
original glass where the shading
correction plate is placed.
Is there a foreign matter on the grid?
Is the grid dirty or deformed?
Is there a foreign matter on the main
charger?
Is the charger wire dirty or
deformed?
Is there a foreign matter inside the
charger case?
Is the inside of the charger case
dirty?
Is there paper dust sticking to the
cleaning blade edge?
Is the cleaning blade working prop-
erly?
Has the used toner been recovered
properly?
Is the fuser roller surface dirty or
damaged?
Is the thermistor dirty?
Are there scratches on the drum
surface?
Is there a foreign matter or stain on
the slit glass?
5 - 120
Prescription
Clean the slit, lens and mirrors.
Clean the plate.
Remove the foreign matter.
Clean or replace the grid.
Remove the foreign matter.
Clean or replace the charger wire.
Remove the foreign matter.
Clean the inside of the case.
Clean or replace the cleaning blade.
Check the pressurization of the drum
cleaning blade.
Clean the toner recovery auger.
Clean or replace the fuser roller.
Clean the thermistor.
Replace the drum.
Remove the foreign matter or the stain.
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