Toshiba E-STUDIO520 - Page 490

e-STUDIO520/523/600/603/720/723/850/853 © 2005 - 2007 TOSHIBA TEC CORPORATION All rights reserved
TROUBLESHOOTING
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2) Background fogging
Fig. 5-2
Defective area Step Check items Prescription
Density reproduction 1 Check the reproduction of the image
density.
Adjust the density.
Printer section 2 Check test print image (04-113). Go to step 4 if there is any problem
on image.
Parameter adjustment
value
3 Check the image processing param-
eter.
Check the range correction setting
and the adjustment value of the
background peak for range correc-
tion. ( ch. 3.3.4, ch. 3.3.5)
If they need to be adjusted, check the
print image in the above circle mark
to adjust the adjustment value of the
background peak for range correc-
tion.
Scanner 4 Are the original glass (especially
shading position),mirrors and lens
dirty?
Clean them.
Developer material/Toner/
Photoconductive drum
5 Using the specified developer mate-
rial, toner and photoconductive
drum?
Use the specified developer material,
toner and photoconductive drum.
6 Have the developer material and the
photoconductive drum reached their
PM life?
Replace the developer material and
photoconductive drum.
7 Is the storage environment of the
toner cartridge 35°C or less without
dew?
Use the toner cartridge stored in the
environment within specification.
Feeding direction