White Banding (In Feeding Direction) - Toshiba e-STUDIO281c Service Handbook

11)White banding (in feeding direction)

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