Oki B4100 - Manual (Page 533)

40055101TH Rev.4 533 /
7) Cleaning
After the end of the transfer, residual toner on the EP (image) drum is attracted to the cleaning
roller temporarily by static electricity to clean the EP (image) drum surface.
8) Cleaning of rollers
The charge roller, transfer roller and cleaning roller are cleaned in the following cases:
• In warning up at power-on time
• In warning up after the cover is opened and closed
• When the number of accumulated sheets is 10 or more and the printout operation ends
Changes in bias voltage applied to each roller move adhesive toner from the roller to the EP
(image) drum and return it to the developer.
Transfer roller
EP drum
Cleaning roller
Power
supply unit
Cleaning "NO" (V)
CB (cleaning)
CH-
TR-
TR+
DB-
DB+
Cleaning "YES" (V)
— +300 V
-300 V -300 V
+1000 V +1000 V
— -750 V
+400 V +400 V
-1350 V -1350 V