Charge - Oki B6100 Technical Manual

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1. Charge

The Bias Charge Roll (BCR) places a uniform negative electrostatic charge on the drum surface. The

drum surface is made of a photoconductive material that holds the electrical charge as long as the

drum remains in darkness. Light striking the drum discharges the surface charge.

The BCR is a conductive roll that is positioned slightly above the surface of the drum. The PWBA

HVPS supplies the BCR with two voltages; a negative DC charge voltage and an AC discharge voltage

The negative DC voltage creates a uniform negative charge across the surface of the drum. The AC

voltage removes any residual DC charge that was left from the previous print cycle.

OKI B6100 Laser Printer - Base Engine Technical Manual

Figure 3. Side view block diagram of the drum charge process

Principles of Operation

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