Oki B4100 - Manual (Page 530)

40055101TH Rev.4 530 /
Note: The toner supply roller and the developing roller are supplied with bias voltages
required during the developing process as shown below. -450 VDC is supplied to
the toner supply roller, -300 VDC to the developing roller.
Connected and bias voltage
supplied when the cover is
closed.
Base
Developing roller
Toner supply roller
EP drum