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FC-22 TROUBLESHOOTING 4 - 68 January 2000 © TOSHIBA TEC
Cause/Defect area
Step
Check items Measures
Main charger
Drum
Discharge LED array
Developer unit
Drive system
High-voltage transformer
(main charger and transfer
roller)
1 Foreign matter on charger?
2 Terminal contact defective?
3 Any abnormalities on drum surface?
4 Discharge LED array lighting properly?
5 Developer sleeve rotation defective? Any
abnormalities on sleeve surface?
6 Drum or scanner jittery?
7 High-voltage transformer output defective?
Remove foreign matter.
Clean or adjust terminals.
Replace drum.
Replace discharge LED array or clean terminals.
Check developer drive system, or clean sleeve sur-
face.
Check each drive system.
Check/correct related circuits.
If high-voltage transformer is defective, replace it.
(12) White banding (at right angles to feeding direction)
Feeding direction