2FM
2-1-6
2-1-2 Electrophotographic system
Electrophotography is the technology used in laser printing which transfer 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.
This section provides technical details on the copier’s electrophotography system.
(1) Electrophotographic cycle
The electrophotography system of the copier performs a cyclic action made of six steps as follows. Each step is
technically explained in the following sections.
Figure 2-1-6 Electrophotographic cycle
The sections for main charging, exposure (drum), developing, and cleaning are modularized in one Process unit.
2 Exposure
3 Developing
6 Cleaning
1 Main charging
4 Transfer
5 Fusing
Process unit
Fuser unit
Laser scaner unit
Drum
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