Uneven Image Density - Toshiba e-STUDIO650 Service Handbook

(16) Uneven image density

Defective area
Main charger
Transfer belt unit
Laser optical unit
Discharge lamp
Developer unit
Scanner section
e-STUDIO550/650/810 TROUBLESHOOTING
Step Check Items
1 Is the main charger dirty?
2 Is the the surface of the transfer belt supply
roller dirty with toner?
3 Is there any foreign object or stain on the
slit glass?
4 Is the discharge lamp dirty?
5 Are any of the discharge lamps off?
6 Is the developer unit installed properly?
7 Is the developer sleeve pressure
mechanism working?
8 Is the developer material transported nor-
mally?
9 (1) Is the RADF open?
(2) Are the original glass (especially
shading position), mirrors and lens
dirty?
Clean or replace the charger wire.
Clean it with alcohol.
Remove the foreign object.
Clean it.
Replace it.
Check and correct the installation state of the
developer unit.
Check the mechanism.
Remove foreign objects if there are any.
(1) Close the RADF.
(2) Clean them.
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Prescription
JUNE 2002 © TOSHIBA TEC