Toshiba e-STUDIO556 Service Manual page 249

8.4.10 White banding (at right angle with the feeding direction)
Defective area
Main charger
Drum
Discharge LED
Developer unit
Drive system
High-voltage transformer
(Main charger / Developer
bias / Transfer charger)
Feed system
e-STUDIO556/656/756/856/557/657/757/857
ERROR CODE AND TROUBLESHOOTING
Fig. 8-10
Step Check items
1 Is there a foreign matter on the
charger?
2 Is the connector in proper contact
with the terminal?
3 Is there any abnormality on the drum
surface?
4 Does the discharge LED light
normally?
5 Is the developer sleeve rotating
normally?
Is there any abnormality on the
sleeve surface?
6 Are the drum and scanner jittering?
7 Is the high-voltage transformer
output defective?
9 Is the aligning amount proper?
8 - 248
Prescription
Remove the foreign matter.
Clean or adjust the terminal.
Replace the drum.
Replace the discharge LED or check
the harness and the circuit.
Check the drive system of the
developer unit, or clean the sleeve
surface.
Check each drive system.
Replace the transformer.
Adjust the aligning amount.
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