Toshiba e-STUDIO166 - Troubleshooting White Spots

e-STUDIO163/166/203/206 © 2005 - 2009 TOSHIBA TEC CORPORATION All rights reserved
TROUBLESHOOTING
5 - 34
14)White spots
Fig. 5-14
Defective area Step Check items Prescription
Developer unit,
Toner cartridge
1 Is the toner density in the developer
material appropriate?
Check and correct the auto-toner
sensor and toner supply operation.
Check if the amount of the toner is
sufficient in the toner cartridge.
2 Is the doctor-sleeve gap proper? Adjust the doctor-sleeve gap.
Developer material, Toner,
Drum
3 Using the specified developer mate-
rial, toner and drum?
Use the specified developer material,
toner and drum.
4 Have the developer material and
drum reached their PM life?
Replace the developer material and
drum.
5 Is the storage environment of the
toner cartridge 35°c or less without
dew?
Use the toner cartridge stored in the
environment with specification.
6 Is there any dent on the drum sur-
face?
Replace the drum.
7 Is there any film forming on the
drum?
Clean or replace the drum.
Main charger 8 Is there any foreign matter on the
charger?
Remove it.
9 Is the needle electrode dirty or
deformed?
Clean or replace the needle elec-
trode.
High-voltage transformer
(Main charger / Developer
bias / Transfer charger)
10 Is the high-voltage transformer out-
put defective?
Adjust the output, or replace the
transformer.
Transfer/Separation
charger
11 Is there any foreign matter such as
fiber in the paper transport area of
the transfer/separation charger?
Clean the transfer/separation
charger.
Feeding direction