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31 December 1992
CHARGE
2.
CHARGE
2.1 OVERVIEW
P1
[A]
[B]
Charge
P1
Grid
This model uses a single wire corona unit [A] to charge the OPC (organic
photoconductor) drum [B]. The corona wire generates a corona of negative
ions when a high negative voltage is applied to it by the charge/grid power
pack [P1].
To make the negative corona uniform, a grid consisting of 8 wires is installed
on the charge corona unit between the corona wire and the drum. This grid
drains off any charge in excess of –940 volts, thus preventing fluctuation of
the charge potential.
2-3
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