Background Fogging - Toshiba e-STUDIO205L Service Handbook

6.4.2

Background fogging

Defective area
Density reproduction
Background reproduction
Printer section
Scanner
Auto-toner
High-voltage transformer
(Main charger / Developer
bias)
Developer unit
Developer material/Toner/
Drum
Drum cleaning blade
Toner dusting
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Fig. 6-2
Step Check items
1 Check the reproduction of the image
density.
2 Check the background reproduction.
3 Check test print image (04-114).
4 Are the original glass, mirrors and
lens dirty?
5 Is the auto-toner sensor normal?
6 Is the toner supplied normally?
7 Is the high-voltage transformer
output defective?
8 Is the contact between the drum and
developer material normal?
9 Using the specified developer
material, toner and drum?
10 Have the developer material and
drum reached their PM life?
11 Is the storage environment of the
toner cartridge 35°c less without
dew?
12 Is the drum cleaned properly?
13 Is toner heaped on the seal of the
developer unit?
6 - 121
Prescription
Adjust the density.
Adjust the background.
Go to step 4 if there is any problem
on image.
Clean them.
Check the performance of the auto-
toner sensor and readjust.
Check the motor and circuits.
Adjust the output, or replace the
transformer.
Adjust the doctor-sleeve gap and
polarity.
Use the specified developer material,
toner and drum.
Replace the developer material and
drum.
Use the toner cartridge stored in the
environment within specification.
Check the pressure of the drum
cleaning blade.
Remove the toner and clean the
developer unit.
e-STUDIO205L/255/305/355/455
ERROR CODE AND TROUBLESHOOTING
6