Charge; Charge Corona - Ricoh M5 Service Manual

May, 25, 1985

CHARGE

1. Charge Corona

This model uses a single wire corona unit to charge the master (organic photoconductor belt).
The corona wire generates a corona of negative ions when a high negative voltage is applied to it by
the charge power pack.
To make the negative corona uniform, a thin stainless steel grid plate is
installed on the master unit.
A varistor between the grid and ground ensures that an even charge is
applied to the master belt.
This grid plate requires no maintenance other than cleaning, because it is
replaced along with the master unit.
The corona unit casing has three ventilation louvers to allow ozone to escape. The ozone is then
drawn through an ozone filter by the cooling fan.
This is to prevent deterioration of the master belt
due to ozone
buildup.
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