e-STUDIO350/352/353/450/452/453 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
TROUBLESHOOTING
5 - 110
2) Background fogging
Defective area Step Check items Prescription
Density reproduc-
tion
1 Check the reproduction of the image
density.
Adjust the density.
Background repro-
duction
2 Check the background reproduction. Adjust the background.
Printer section 3 Check test print image (04-113). Go to step 4 if there is any problem on
image.
Scanner 4 Are the original glass, mirrors and
lens dirty?
Clean them.
Auto-toner 5 Is the auto-toner sensor normal? Check the performance of the auto-toner
sensor and readjust.
6 Is the toner supplied normally? Check the motor and circuits.
High-voltage trans-
former (Main
charger / Developer
bias)
7 Is the high-voltage transformer out-
put defective?
Adjust the output, or replace the trans-
former.
Developer unit 8 Is the contact between the drum and
developer material normal?
Adjust the doctor-sleeve gap and polarity.
Developer material/
Toner/Drum
9 Using the specified developer mate-
rial, toner and drum?
Use the specified developer material, toner
and drum.
10 Have the developer material and
drum reached their PM life?
Replace the developer material and drum.
11 Is the storage environment of the
toner cartridge 35°c less without
dew?
Use the toner cartridge stored in the envi-
ronment within specification.
Drum cleaning
blade
12 Is the drum cleaned properly? Check the pressure of the drum cleaning
blade.
Toner dusting 13 Is toner heaped on the seal of the
developer unit?
Remove the toner and clean the developer
unit.
Feeding direction
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