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e-STUDIO520/600/720/850 TROUBLESHOOTING
March 2005 © TOSHIBA TEC
5 - 142
16)Uneven image density
Fig.5-16
Defective area
Step
Check items
Prescription
Main charger
1
Is the main charger dirty?
Clean or replace the main charger
grid.
Transfer belt unit
2
Is the surface of the transfer belt sup-
ply roller dirty with toner?
Clean it with alcohol.
Laser optical unit
3
Is there any foreign matter or stain on
the 2 slit glasses?
Remove the foreign matter or stain.
Discharge LED
4
Are the connectors of discharge LED
harness securely connected?
Reconnect the harness securely.
5
Is the discharge LED dirty?
Clean the discharge LED.
6
Is any of the discharge LEDs off?
Replace the discharge LED.
Developer unit
7
Is the developer material transported
normally?
Remove foreign matters if there is
any.
Scanner section
8
Are the original glass (especially the
position of shading correction plate),
mirror and lens dirty?
Clean them.
Feeding direction
Summary of Contents for E-STUDIO520
Page 2: ... 2005 TOSHIBA TEC CORPORATION All rights reserved ...
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Page 200: ...e STUDIO520 600 720 850 ERROR CODE AND SELF DIAGNOSTIC MODE March 2005 TOSHIBA TEC 2 176 ...
Page 288: ...e STUDIO520 600 720 850 ADJUSTMENT March 2005 TOSHIBA TEC 3 88 ...
Page 540: ...e STUDIO520 600 720 850 POWER SUPPLY UNIT March 2005 TOSHIBA TEC 7 6 ...
Page 586: ...e STUDIO520 600 720 850 DATA CLONING with USB STORAGE DEVICE March 2005 TOSHIBA TEC 9 22 ...
Page 588: ...e STUDIO520 600 720 850 WIRE HARNESS CONNECTION DIAGRAMS March 2005 TOSHIBA TEC 10 2 ...
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