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6 January 1990
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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