Ricoh V-C3 Technical Training Manual page 321

OPC Drum
Slide 321
# The K unit has a charge corona unit, as explained earlier.
# The charge corona unit is a Scorotron type.
# Note that there are no ID sensors near the drum. These are near the ITB, and
the machine writes the ID sensor patterns on the ITB.
Drum Unit Contents - K
321
Charge Corona
Unit
Drum Cleaning Unit
V-C3 Training