Toshiba e-STUDIO351c Service Handbook page 518

12)White banding (at right angles to feeding direction)
Cause/Section Step
Main charger 1
2
Drum 3
4
Discharge lamp 5
Developer unit 6
7
Drive systems 8
High-voltage 9
transformer
(main charger
wire/grid, 1st/
2nd transfer
roller and devel-
oper bias)
e-STUDIO281c/351c/451c TROUBLESHOOTING
Check items
Is there foreign matter on the charger?
Is the terminal contact poor?
Is there any abnormalities on the drum
surface?
Is the drum grounded?
Is the discharge lamp 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 jit-
tery?
Is the high-voltage transformer output
defective?
Fig. 5-12
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.
5 - 126
Measures
June 2005 © TOSHIBA TEC