Toshiba e-STUDIO350 Service Handbook page 554

10) White banding (at right angle with the feeding direction)
Defective area Step
Main charger 1
2
Drum 3
Discharge LED 4
Developer unit 5
Drive system 6
High-voltage trans- 7
former (Main
charger / Developer
bias / Transfer
charger)
Transfer charger 8
Feed system 9
e-STUDIO350/352/353/450/452/453
TROUBLESHOOTING
Check items
Is there a foreign matter on the
charger?
Is the connector in proper contact
with the terminal?
Is there any abnormality on the
drum surface?
Does the discharge LED light nor-
mally?
Is the developer sleeve rotating nor-
mally? Is there any abnormality on
the sleeve surface?
Are the drum and scanner jittering?
Is the high-voltage transformer out-
put defective?
Is any foreign matter such as paper
shred sticking to the transfer
charger wire?
Is the aligning amount proper?
5 - 118
05/11
Prescription
Remove the foreign matter.
Clean or adjust the terminal.
Replace the drum.
Replace the discharge LED or clean the
terminals.
Check the drive system of the developer
unit, or clean the sleeve surface.
Check each drive system.
Adjust the output, or replace the trans-
former.
Remove the foreign matter from the wire.
Adjust the aligning amount.
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