(16) White spots

Feeding direaction

Cause/Defect area

Step

Check items

Measures

Developer unit/

1

Toner density of developer material proper?

Check and correct auto-toner sensor and toner sup-

Toner cartridge

 

 

ply operation.

 

 

 

Check whether amount of toner is sufficient in toner

 

 

 

cartridge.

Doctor-sleeve gap

2

Doctor-sleeve gap proper?

Adjust gap.

Main charger

3

Foreign matter on charger?

Remove it.

 

4

Charger wire dirty or deformed?

Clean or replace charger wire.

High-voltage transformer

5

High-voltage transformer output defective?

Adjust output.

(main charger/ developer

 

 

 

bias/transfer roller)

 

 

 

Developer material

6

Accumulated copy volume for replacement

Replace developer material.

 

 

attained?

 

FC-22 TROUBLESHOOTING

4 - 72

January 2000 © TOSHIBA TEC

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Image 198
Toshiba FC-22 manual White spots Feeding direaction, Cause/Defect area Step Check items Measures Developer unit