Explanation Of Operation; Electrophotographic Processing Mechanism - Oki C5500 Maintenance Manual

2.

EXPLANATION OF OPERATION

2.1

Electrophotographic processing mechanism

(1) Electrophotographic process
The electrophotographic process is explained briefly below:
1. Charging
A voltage is applied to the CH roller to electrically charge the surface of the OPC drum.
2. Exposure
The LED head radiates light onto the charged OPC drum in accordance with the image
signal. The electric charge of the radiated part of the OPC drum surface attenuates
depending on the intensity of the light, thus forming an electrostatic latent image on the
OPC drum surface.
3. Development
Charged toner adheres to the electrostatic latent image of the OPC drum by electrostatic
power, and forms a visible image on the OPC drum surface.
4. Transfer
Paper is placed over the OPC drum surface and an electric charge is applied to it from
the back side by the transfer roller, so that the toner image is transferred to the paper.
5. Drum cleaning
The drum cleaning blade removes toner remaining on the OPC drum after the transfer.
6. Removal of Electricity
7. Belt cleaning
The belt cleaning blade removes toner remaining on the belt.
8. Fuser
Heat and pressure are applied to the toner image on the paper to promote its fusion.
1. Charging
A voltage is applied to the charging roller, which is placed in contact with the OPC drum
surface, to charge the OPC drum surface.
43085101TH Rev.1
Charging roller
Power
Supply
Unit
OPC drum
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Oki Data CONFIDENTIAL
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