Epson EPL-N4000 - Charge

EPSON EPL-N4000/EPL-N4000+ Chapter 2 Operating Principles
Rev.B 69
2.4.1 Charge
The Bias Char
g
e Roll (BCR) places a uniform ne
g
ative electrostatic
char
g
e on the surface of the drum. The drum surface is made of a
photoconductive material that holds an electrical char
g
e as lon
g
as the
drum remains in darkness. Li
g
ht strikin
g
the drum dischar
g
es the
surface char
g
e.
The BCR is a conductive roll that is positioned sli
g
htly above the
surface of the drum. The HVPS supplies the BCR with two volta
g
es; a
ne
g
ative DC char
g
e volta
g
e and an AC dischar
g
e volta
g
e that is used
for electrically cleanin
g
the drum.
Figure 2-25. Charging
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