Drum Charge; Laser Exposure; Figure 2-5. Drum Charge; Figure2-6. Laserexposure - Epson ActionLaser 1300 EPL-3000 Service Manual

Drum Charge

2.1.1.3
Drum charge is the process of charging the PC drum with static electricity before laser exposure.
This printer uses the brush charge method, rather than corona charge, to charge the drum. In
brush charge, there is no generation of ozone as a result of corona discharge. This method also
allows the drum to be charged at a low voltage, because a direct electric load is applied to the PC
drum.
/-Rayon Brush
PC Drum

2.1.1.4 Laser Exposure

Laser exposure is the process
laser beams emitted from the optical unit. The mirror motor (scanner motor) rotates the four-sided
mirror counterclockwise to produce a laser light scan. (One side of the mirror produces one scan.)
The SOS (start of scan) sensor detects the laser rays from the SOS mirror and outputs the SOS
signals to make the starting position of each line of the image uniform.
Laser emission
PC Drum
-50V
Invisible static-
electricity image
Rev. A
Imaging Cartridge
T
A: Drum Charge Bias
C: Doctor Blade Bias

Figure 2-5. Drum Charge

of creating an invisible static electric image on the PC drum with
Print Head Unit
Sos
LD
Figure 2-6. Laser Exposure
Operating Principles
B: Developing Bias
D: Drum Ground
Motor
2-5