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June 2005 © TOSHIBA TEC e-STUDIO281c/351c/451c TROUBLESHOOTING
5 - 117
5
18)Uneven image density
Fig.5-18
Cause/Section Step Check items Measures
Main charger 1 Is the main charger dirty? Clean it or replace the charger wire.
Transfer unit 2 Is the transfer belt or 1st/2nd transfer roll-
ers dirty?
Clean the belt.
3 Is the transfer belt in proper contact with
the drum?
Correct it.
4 Is 2nd transfer roller in proper contact with
the transfer belt? (Is the roller tilted?)
Correct it.
5 Is there any abnormalities or deformation
on the transfer belt?
Replace the transfer belt.
Laser optical unit 6 Is there foreign matter or dust on the slit
glass?
Clean the slit glass.
Discharge lamp 7 Is the discharge lamp dirty? Clean it.
8 Has any LED of discharge lamp gone
out?
Replace it.
Developer unit 9 Is the magnetic brush in proper contact
with the drum?
Adjust the doctor-sleeve gap.
10 Is the developer unit pressure mechanism
malfunctioning?
Check the mechanism.
11 Is the transport of developer material
poor?
Remove foreign matter if any.
Scanner section 12 a. Is the platen cover or RADF open?
b. Is the original glass, mirrors, or lens
dirty?
a. Close the platen cover or RADF.
b. Clean them.
Feeding direction