White Banding (At Right Angles To Feeding Direction) - Toshiba e-STUDIO281c Service Handbook

12)White banding (at right angles to feeding direction)

Cause/Section Step
Main charger 1 Is there foreign matter on the charger?
2 Is the terminal contact poor?
Drum 3 Is there any abnormalities on the drum
surface?
4 Is the drum grounded?
Discharge lamp 5 Is the discharge lamp lighting properly?
Developer unit 6 Is the developer sleeve rotating correctly?
Is there any abnormalities on the sleeve
surface?
7 Is the connection of developer bias supply
terminal normal?
Drive systems 8 Is the drum, scanner or transfer belt jit-
tery?
High-voltage 9 Is the high-voltage transformer output
transformer defective?
(main charger
wire/grid, 1st/
2nd transfer
roller and devel-
oper bias)
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Fig. 5-12
Check items
5 - 127
Measures
Remove foreign matter.
Clean or adjust the terminals.
Replace the drum.
Check the contact of the grounding plate.
Replace the discharge lamp or clean ter-
minals.
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.
e-STUDIO281c/351c/451c
TROUBLESHOOTING
5