White Banding (At Right Angles To Feeding Direction) - Toshiba e-STUDIO 2555C Service Manual

8.5.13

White banding (at right angles to feeding direction)

Cause/Section Step
Main charger 1
Drum 2
3
Discharge 4
LED
Developer unit 5
6
Drive systems 7
High-voltage 8
transformer
(main charger
needle
electrode/grid,
1st/2nd
transfer roller
and developer
bias)
Main charger 9
Main charger 10
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Fig.8-17
Check item
Is the terminal contact poor?
Is there any abnormalities on the
drum surface?
Is the drum grounded?
Is the discharge LED lighting
properly?
Is the developer sleeve rotating
correctly?
Is there any abnormalities on the
sleeve surface?
Is the connection of developer bias
supply terminal normal?
Is the drum, scanner or transfer belt
jittery?
Is the high-voltage transformer
output defective?
Is the charger grid dirty or deformed? Clean or replace the charger grid.
Is there foreign matter on the
charger grid?
8 - 299
Measures
Clean or adjust the terminals.
Replace the drum.
Check the contact of the grounding
plate.
Replace the discharge LED or clean
terminals.
Check the developer drive system,
or clean the sleeve surface.
Correct it.
Check each drive system.
Check/correct any electric leakage
and related circuits.
If the high-voltage transformer does
not work, replace it.
Remove foreign matter.
Clean or replace the charger grid.
e-STUDIO2555C/3055C/3555C/4555C/5055C
ERROR CODE AND TROUBLESHOOTING
8