43856301TH Rev.3
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Oki Data CONFIDENTIAL
2. Operating instructions
(1) Electrophotographic processing
The general of Electrophotography process is described as below.
1. Charging
The voltage is impressed to CH roller, and the surface of OPC drum is
electrified.
2. Exposure
LED head irradiates light to the image signal on the surface of the electrified
OPC drum. The electricity of the irradiated part on the surface of the OPC drum
is attenuated by changing in light intensity, the electrostatic latent image is
formed on the surface of the OPC drum.
3. Development
The electrified toner adheres to the electrostatic latent image of the OPC drum
by electrostatic force, and the image is developed on the surface of the OPC
drum.
4. 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, the toner image is
transcribed to the paper.
5. Fusing
Heat and pressure are applied to the toner image on the paper in order to make
it fusing.
6. Drum cleaning
The drum cleaning blade removes the toner left on the OPC drum after transfer.
7. Electricity removal
The electric potential left on the drum is removed.
8. Belt cleaning
The belt cleaning blade removes the toner left on the belt.
2.1 Electrophotographic processing mechanism
(2) Charging
The voltage is impressed to the charging roller in contact with the surface of
OPC drum, and the surface of OPC drum is charged.
(3) Exposure
The light generated from LED head is irradiated onto the surface of the electrified
OPC drum. The electricity of the irradiated part on the surface of the OPC drum is
attenuated by changing in light intensity, the electrostatic latent image is formed
on the surface of the OPC drum.
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Power
unit
OPC drum
Paper
LED head
OPC drum
LED head
Charging roller
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Power
unit
Charging roller
OPC drum
