Toshiba e-STUDIO556 Service Manual page 256

8.4.16 Uneven image density
Defective area
Main charger
Transfer belt unit
Laser optical unit
Discharge LED
Developer unit
Scanner section
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Fig. 8-16
Step Check items
1 Is the main charger dirty?
2 Is the surface of the transfer belt
supply roller dirty with toner?
3 Is there any foreign matter or stain on
the 2 slit glasses?
4 Are the connectors of discharge LED
harness securely connected?
5 Is the discharge LED dirty?
6 Is any of the discharge LEDs off?
7 Is the developer material transported
normally?
8 Are the original glass (especially the
position of shading correction plate),
mirror and lens dirty?
8 - 255
Prescription
Clean or replace the main charger
grid.
Clean it with alcohol.
Remove the foreign matter or stain.
Reconnect the harness securely.
Clean the discharge LED.
Replace the discharge LED.
Remove foreign matters if there is
any.
Clean them.
e-STUDIO556/656/756/856/557/657/757/857
ERROR CODE AND TROUBLESHOOTING
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