SERVICE MANUAL - O. Rensch OHG

2DC
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.
Process unit
Laser scaner unit
1 Main charging
2 Exposure
6 Cleaning
Drum
3 Developing
4 Transfer
5 Fusing
Fuser unit
Figure 2-1-7 Electrophotographic cycle
The sections for main charging, exposure (drum), developing, and cleaning are modularized in one Process unit.
2-1-7