Samsung CLP-510/XBH Service Manual page 37

System Outline
5.1.2 LSU (Exposure)
The bitmap image data stream is used to switch the LSU data beam. Where white paper is
required the beam is off, where ink is required the beam is turned on. When the laser is on
and the beam strikes the OPC drum surface the charge is reduced to -50V, where the beam is
switched off the charge on the OPC surface remains at -600V. In consequence a latent image is
formed on the drum surface.
Unexposed Expesed
-600V
-50V
Service Manual
5-2
Unexposed
-600V
Polygon Motor
(30,000rpm)
Reflecting Mirror
Samsung Electronics