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e-STUDIO281c/351c/451c TROUBLESHOOTING June 2005 © TOSHIBA TEC
5 - 110
12)White banding (at right angles to feeding direction)
Fig.5-12
Cause/Section Step Check items Measures
Main charger 1 Is there foreign matter on the charger? Remove foreign matter.
2 Is the terminal contact poor? Clean or adjust the terminals.
Drum 3 Is there any abnormalities on the drum
surface?
Replace the drum.
4 Is the drum grounded? Check the contact of the grounding plate.
Discharge lamp 5 Is the discharge lamp lighting properly? Replace the discharge lamp or clean ter-
minals.
Developer unit 6 Is the developer sleeve rotating correctly?
Is there any abnormalities on the sleeve
surface?
Check the developer drive system, or
clean the sleeve surface.
7 Is the connection of developer bias supply
terminal normal?
Correct it.
Drive systems 8 Is the drum, scanner or transfer belt jit-
tery?
Check each drive system.
High-voltage
transformer
(main charger
wire/grid, 1st/
2nd transfer
roller and devel-
oper bias)
9 Is the high-voltage transformer output
defective?
Check/correct any electric leakage and
related circuits.
If the high-voltage transformer does not
work, replace it.
Feeding direction