Toshiba e-STUDIO351c Service Handbook page 525

18)Uneven image density
Cause/Section Step
Main charger 1 Is the main charger dirty?
Transfer unit 2 Is the transfer belt or 1st/2nd transfer roll-
ers dirty?
3 Is the transfer belt in proper contact with
the drum?
4 Is 2nd transfer roller in proper contact with
the transfer belt? (Is the roller tilted?)
5 Is there any abnormalities or deformation
on the transfer belt?
Laser optical unit 6 Is there foreign matter or dust on the slit
glass?
Discharge lamp 7 Is the discharge lamp dirty?
8 Has any LED of discharge lamp gone
out?
Developer unit 9 Is the magnetic brush in proper contact
with the drum?
10 Is the developer unit pressure mechanism
malfunctioning?
11 Is the transport of developer material
poor?
Scanner section 12 a. Is the platen cover or RADF open?
b. Is the original glass, mirrors, or lens
June 2005 © TOSHIBA TEC
Fig. 5-18
Check items
dirty?
5 - 133
Measures
Clean it or replace the charger wire.
Clean the belt.
Correct it.
Correct it.
Replace the transfer belt.
Clean the slit glass.
Clean it.
Replace it.
Adjust the doctor-sleeve gap.
Check the mechanism.
Remove foreign matter if any.
a. Close the platen cover or RADF.
b. Clean them.
e-STUDIO281c/351c/451c TROUBLESHOOTING
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