Uneven Image Density - Toshiba FC-22 Manual

(18) Uneven image density

Cause/Defect area
Main charger
Transfer belt
Laser optical unit
Discharge LED array
Developer unit
Scanner section
FC-22 TROUBLESHOOTING
Step Check items
1 Main charger dirty?
2 Transfer belt dirty?
3 Transfer belt in defective contact with
drum?
4 Any abnormalities or deformation on belt?
5 Foreign matter or dust on slit glass?
6 Discharge LED array dirty?
7 Any lamp of discharge LED array gone out?
8 Magnetic brush in defective contact with
drum?
9 Developer unit pressure mechanism mal-
functioning?
10 Defective transport of developer material?
11 1. Platen cover open?
2. Glass, mirrors, or lens filter dirty?
Clean it or replace charger wire.
Clean belt.
Adjust belt.
Replace belt.
Clean slit glass.
Clean it.
Replace it.
Adjust doctor-sleeve gap.
Check mechanism.
Remove foreign matter if any.
1. Close platen cover.
2. Clean them.
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Measures
January 2000 © TOSHIBA TEC