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FC-22 TROUBLESHOOTING 4 - 72 January 2000 © TOSHIBA TEC
Cause/Defect area
Step
Check items Measures
Developer unit/
Toner cartridge
Doctor-sleeve gap
Main charger
High-voltage transformer
(main charger/ developer
bias/transfer roller)
Developer material
1 Toner density of developer material proper?
2 Doctor-sleeve gap proper?
3 Foreign matter on charger?
4 Charger wire dirty or deformed?
5 High-voltage transformer output defective?
6 Accumulated copy volume for replacement
attained?
Check and correct auto-toner sensor and toner sup-
ply operation.
Check whether amount of toner is sufficient in toner
cartridge.
Adjust gap.
Remove it.
Clean or replace charger wire.
Adjust output.
Replace developer material.
(16) White spots
Feeding direaction