White Spots - Toshiba e-STUDIO 2555C Service Manual

8.5.17

White spots

Cause/Section Step
Developer 1
unit/Toner
cartridge
2
Developer 3
material/
Toner/Drum
4
5
6
7
8
Transfer unit 9
10
Main charger 11
12
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Fig.8-21
Check item
Is the toner density of developer
material proper?
Is the doctor-sleeve gap proper?
Using the specified developer
material, toner and drum?
Have the developer material and
drum reached their PM life?
Is the storage environment of the
toner cartridge 35oC or less without
dew?
Is there any dent on the surface of
the drum?
Is there any film forming on the
drum?
Is the drum bedewed?
Is there foreign matter on the
transfer belt surface?
Is there foreign matter on the
transfer belt 2nd transfer facing
roller?
Is there foreign matter on the
charger?
Is the needle electrode dirty or
deformed?
8 - 305
Measures
Check and correct the auto-toner
sensor and toner supply operation.
Check if the amount of toner is
sufficient in the toner cartridge.
Adjust the gap.
Use the specified developer
material, toner and drum.
Replace the developer material and
drum.
Use the toner cartridge stored in the
environment within specification.
Replace the drum.
Clean or replace the drum.
Wipe the drum surface with a piece
of dry cloth.
Remove foreign matter.
Clean the transfer belt unit.
Remove it.
Clean or replace the needle
electrode.
e-STUDIO2555C/3055C/3555C/4555C/5055C
ERROR CODE AND TROUBLESHOOTING
8