Oki OKIPAGE8c Maintenance Manual page 23

(3) Charging
This process applies a DC voltage to the charging roller in contact with the surface of the OPC
drum.
(4) Exposure
The light beams from the LED head are applied to the surface of the OPC drum which is
charged negatively. The negative charge on the illuminated surface of the OPC drum is
reduced according to magnitudes of the light beams and a latent image is formed on the
surface of the OPC drum according to the resulting surface potentials.
Power
supply
unit
OPC drum
Power
supply
unit
OPC drum
Charging roller
Charging roller
LED head
Paper
2 - 10
LED head
OPC drum