Exposure - Kyocera FS-1920 Service Manual

2FP/2FY/2FR

(2) Exposure

The charged surface of the drum is exposed to the laser beam scanning from the laser scanner unit.
Polygon motor
The polygon motor (with polygon mirrors) revolves (27,165 rpm) to reflect the laser beam over the drum. Lenses and
diversion mirror are housed in the laser scanner unit. These lenses adjust the diameter of the laser beam (670 nm
wavelength) so that the laser beam effectively focalizes on the drum surface.
2-1-10
Lens
Lens
Figure 2-1-10 Exposure
Diversion mirror
Laser beam
output
Drum
Laser scanner
unit