Toshiba e-STUDIO520 Service Handbook page 508

17)Faded image (low density, abnormal gray balance)
Defective area
Developer material/Toner/
Photoconductive drum
Toner Cartridge
Main charger output
e-STUDIO520/523/600/603/720/723/850/853
TROUBLESHOOTING
Fig. 5-17
Step Check items
1 Using the specified developer mate-
rial, toner and photoconductive
drum?
2 Have the developer material and the
photoconductive drum reached their
PM life?
3 Is there any film forming on the pho-
toconductive drum?
4 Is the toner supply symbol lighting?
5 Is the toner cartridge installed prop-
erly?
6 Is the performance of the new toner
supply motor normal?
7 Is the toner cartridge normal?
8 Is the setting value proper?
Is the main charger output normal?
5 - 146
Prescription
Use the specified developer material,
toner and photoconductive drum.
Replace the developer material and
photoconductive drum.
Clean or replace the drum.
Replace the toner cartridge.
Check the installation state of the
toner cartridge, install it securely.
Check the performance of the new
toner supply motor.
Check the toner cartridge.
Replace if it is not normal.
Replace the high-voltage transformer
with a new one and print out a test
chart.
If any abnormal image appears,
check the harness connection
between the LGC board and the
high-voltage transformer, power sup-
ply and stain on the main charger
wire.
© 2005 - 2007 TOSHIBA TEC CORPORATION All rights reserved