JUNE 2002 © TOSHIBA TEC
5 - 121
e-STUDIO550/650/810 TROUBLESHOOTING
(14) White spots
Feeding direction
Defective area
Step
Check Items
Prescription
Remarks
Toner empty
1
Is the toner supply symbol lighting?
Replace the toner cartridge.
2
Is the toner cartridge installed properly?
Check the installation state of the
toner cartridge.
3
Is the performance of the toner motor Check the performance of the toner
normal?
motor.
4
Is the toner cartridge normal?
Check the toner cartridge.
Replace if it is not normal.
Decreasing toner density
5
Is the performance of the auto-toner
Check the performance of the
sensor control normal?
auto-toner sensor.
6
Is the toner density low?
Correct the toner density.
(Note 2: See ‘Toner density
correcting method’.)
Developer material/Toner/
7
Using the specified developer
Use the specified developer material,
Photoconductive drum
material, toner and photoconductive drum?
toner and photoconductive drum.
8
Have the developer material and the
Replace the developer material and
photoconductive drum reached their PM life? photoconductive drum.
9
Is the storage environment of the toner
Use the toner cartridge stored in the
cartridge 35°C or less without dew?
environment within specification.
10 Is there any dent on the surface of
Replace the drum.
the photoconductive drum?
11 Is there any film forming on the
Clean or replace the drum.
photoconductive drum?
Main charger
12 Is there any foreign object on the charger?
Remove it.
13 Is the charger dirty or deformed?
Clean or replace the charger wire and grid.