White Spots - Toshiba e-STUDIO556 Service Manual

8.4.14

White spots

Defective area
Toner empty
Decreasing toner density
Developer material/Toner/
Photoconductive drum
Main charger
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Fig. 8-14
Step Check items
1 Is the toner supply symbol lighting?
2 Is the toner cartridge installed
properly?
3 Is the performance of the new toner
supply motor normal?
4 Is the toner cartridge normal?
5 Is the Auto-toner sensor connected
correctly?
6 Is the toner density low?
7 Using the specified developer
material, toner and photoconductive
drum?
8 Have the developer material and the
photoconductive drum reached their
PM life?
9 Is the storage environment of the
toner cartridge 35°c or less without
dew?
10 Is there any dent on the surface of
the photoconductive drum?
11 Is there any film forming on the
photoconductive drum?
12 Is there any foreign object on the
charger?
13 Is the charger dirty or deformed?
8 - 233
Prescription
Replace the toner cartridge.
Check the installation state of the
toner cartridge.
Check the performance of the new
toner supply motor.
Check the toner cartridge.
Replace if it is not normal.
Check the connection of the
connector of the Auto-toner sensor.
Correct the toner density.
(Note 2: See 'Toner density
correcting method'.)
Use the specified developer material,
toner and photoconductive drum.
Replace the developer material and
photoconductive drum.
Use the toner cartridge stored in the
environment within specification.
Replace the drum.
Clean or replace the drum.
Remove it.
Clean or replace the main charger
wire and grid.
e-STUDIO556/656/756/856(Ver03)
ERROR CODE AND TROUBLESHOOTING
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