2A3/4
1-3-22
Image printing
The image data scanned by the CCD PCB (CCDPCB) is processed on the main PCB
(MPCB) and transmitted as image printing data to the laser scanner unit (LSU). By
repeatedly turning the laser on and off, the laser scanner unit forms a latent image on
the drum surface.
• Laser scanner unit
Oject mirror
Lens 4
Cylindrical correcting lens
BD sensor
Motor drive PCB
Polygon motor (PM)
Polygon mirror
Lens 2
Lens 3
Lens 1
Beam spritter
Collimator lenses
Laser diodes (LD)
LD control PCB
BD sensor mirror
Figure 1-3-19 Laser scanner unit (1)