Oki MC770 series Maintenance Manual - page 25

45376001TH  Rev.1 

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Oki  Data  CONFIDENTIAL

2.  Operating instructions

(4) Development

The toner adheres to the electrostatic latent image on the surface of the drum, 

and the electrostatic latent image is changed into the toner image.

1.  The sponge roller makes the toner adhere to the developing roller.

2.  The electrostatic latent image on the surface of the OPC drum surface is 

visualized by toner.

(5) Transfer

The paper is overlapped on the surface of the OPC drum, and the electricity is 

generated on the back of the paper by transfer roller.

When high voltage is impressed from the power supply to the transfer roller, the 

electricity induced in the transfer roller is moved to the surface of the paper via 

contact surface, and the toner is drawn from the surface of the OPC drum to the 

surface of the paper.

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Developing roller

Sponge roller

OPC drum

Charging roller

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Power

unit

OPC drum

Transfer roller

Paper

Transport belt