Ricoh V-C3 Technical Training Manual page 330

Charge Corona
Unit
! The CGB power pack (a constant dc power pack) applies a
high electrostatic charge to the corona wires.
Slide 330
# The K unit has a charge corona unit, as explained earlier.
# The charge corona unit is a Scorotron type.
# This system generates more ozone than a charge roller system, so the ozone
filter is larger than the V-C1, and more fans are added.
Drum Charge - K
330
OPC Drum
V-C3 Training