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June 2005 © TOSHIBA TEC e-STUDIO281c/351c/451c TROUBLESHOOTING
5 - 109
5
11)White banding (in feeding direction)
Fig.5-11
Cause/Section Step Check items Measures
Laser optical unit 1 Is there foreign matter or dust on the slit
glass?
Clean the slit glass.
Main charger
grid
2 Is there foreign matter on the charger
grid?
Remove foreign matter.
Developer unit 3 Is there foreign matter inside the doctor
blade?
Remove foreign matter.
4 Is there foreign matter on the drum seal? Remove foreign matter.
5 Is the drum seal of developer unit in
proper contact with the drum?
Modify the position of drum seal or
replace it.
Drum 6 Is there scratch or foreign matter on the
drum surface?
Replace the drum.
Transfer unit 7 Is there scratch or foreign matter on the
transfer belt surface?
Replace the transfer belt.
8 Are the harness or foreign matters in con-
tact with the transfer belt surface?
Correct or remove them.
9 Is the transfer belt cleaning blade con-
tacted and released properly?
Check if the spring of the transfer belt
cleaner clutch is removed or if any con-
nector is disconnected. Otherwise replace
the clutch.
10 Is the transfer belt cleaning blade in
proper contact with the transfer belt?
Check if the blade pressure spring is
installed.
11 Is there any scratch or hole on the 1st/2nd
transfer roller?
Replace the 1st/2nd transfer roller.
Transport path 12 Does the toner image touch foreign mat-
ter after transfer, before entering the fuser
unit?
Remove foreign matter.
Discharge lamp 13 Has any LED of discharge lamp gone
out?
Replace the discharge lamp.
Scanner 14 Is there foreign matter or dust in the opti-
cal path?
Clean the lens and mirrors.
Feeding direction