Oki Data CONFIDENTIAL
2. Operational explanation
44983601TH Rev.1
2-1 /
2. Operational explanation
2.1 Electrophotographic process mechanism
(1) Electrophotographic process
The following describes the overview of electrophotographic process.
1. Charging
Equally charge the surface of image drum by implying negative voltage to the charged roller due to
negative charge.
2. Exposure
The light from LED Head is exposed on the negative-charged surface of image drum. The surface
electrical potential of the exposed part of image drum surface becomes lower. Then forms electrostatic
latent image.
3. Development
Negative-charged toner is attracted to the electrostatic latent image due to electrostatic while touching
the image drum. Then forms viewable image.
4. Transfer
Overlap paper on the surface of OPC drum, from the backside of paper transfer toner image to the
paper by applying electrical charge by transfer roller.
5. Fusing
The toner image that is transferred to paper is fused on paper by heat and pressure.
6. Drum cleaning
The cleaning blade scrapes off the toner that was not transferred and remains on the image drum.
7. Static elimination
Residual potential on the image drum is removed.
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