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4.1
Electrophotographics system
Electrophotography is the technology used in laser printing which transfers data
representing texts or graphics objects into a visible image which is developed on
the photosensitive drum, finally fusing on paper, using light beam generated by a
laser diode.
The key features for the electrophotography system used in the printer are:
•
600 dpi resolution
•
Newly developed organic photoconductor drum with no heating device
•
Diode laser scanning
•
Mono component toner
Electrophotographic system
The electrophotography system of the printer performs a cyclic action made of
seven steps as diagrammed below.
Figure 4.1
Electrophotographic cycle
OPC drum
The printer uses the long-life OPC drum. This drum is composed of an aluminum
tube as elementary tube on which various materials are stacked in layers for form-
ing a photoconductor.
A schematic diagram of a cross section of the drum is shown below.
Electrophotographics system
Charging
Erasure
Drum cleaning
4-2
Operation theory
Exposure
Development
Transfer
Fusing
FS-6750
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