Ricoh BL-P1 Series Service Training page 37

Print Processes 3 – Laser Exposure
A latent image is
formed on the
positively charged
drum by light from the
laser unit.
Where light strikes, the
resistance of the OPC
layer drops and the
charge on the drum
surface goes through
the aluminum core to
ground.
Refer to the Core Technology Manual for more information about laser printing
systems.
Laser diode
37
Lens
Polygon mirror
Laser unit
Drum