Toshiba e-studio281c, Service Handbook, Page: 537 / 678

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TROUBLESHOOTING
5 - 131
5
15)Color banding (at right angles to feeding direction)
Fig. 5-15
Cause/Section Step Check items Measures
Main charger 1 Is the charger wire dirty or deformed? Clean or replace the charger wire.
Fuser unit 2 Is the fuser belt, pressure roller or oil roller
dirty?
Clean them.
High-voltage
transformer
(main charger
wire/grid and
transfer roller
bias)
3 Is the high-voltage transformer output
defective?
Check the circuit and replace the highvolt-
age transformer if not working.
4 Is each joint of high-voltage output loos-
ened? (Check if any electric leakage is
causing noise.)
Reconnect each joint.
Drum 5 Is there deep scratch on the drum sur-
face?
Replace the drum, especially if the
scratch has reached the aluminum base.
6 Are there fine scratches on the drum sur-
face (drum pitting)?
Check and correct the contact of cleaning
blade and recovery blade.
7 Is the drum grounded? Check the contact of the grounding plate.
2nd transfer
roller
8 Is the 2nd transfer roller rotating nor-
mally?
Clean the roller area or replace the roller.
Scanner 9 Is there foreign matter on the carriage
rail?
Remove foreign matter.
Feeding direction