Print Process Description; Charge - Epson ColorPage EPL-C8200 Service Manual

EPSON ColorPage EPL-C8200

2.1.3 Print Process Description

2.1.3.1 (1) Charge

In the Charge step, the surface of the drum rotates at a constant speed
and is uniformly charged (negative) by the discharge of the BCR (Bias
Charge Roll) in the Drum Cartridge.
Chapter 2 Operating Principles


The BCR is always in contact with the surface of the drum, driven by the
drum rotation. The BCR is a conductive roll, receiving discharge voltage
from the HVPS. The discharge voltage is negative DC voltage to which AC
voltage has been superimposed. The discharge occurs in the very small
gap between the BCR and the drum surface. The drum surface is uniformly
charged (negative) with DC bias voltage. The drum surface consists of
photoconductive material (on the surface) and an aluminum cylinder
(inside the drum). (The photoconductive material becomes conductive
when it receives light; it becomes an insulator in the dark.)
Figure 2-3. Charge
Revision A
2-3