2DC
2-1-7
2-1-3 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 2-1-7 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
