Laser scanner system
The laser/scanner system forms the latent electrostatic image on the photosensitive drum inside the toner
cartridge.
The DC controller receives instructions from the formatter regarding the image of the page to be printed. The
DC controller signals the lasers to emit light, and the laser beams pass through lenses and onto the scanner
mirror, which rotates at a constant speed. The mirror reects the beam onto the photosensitive drum in the
pattern required for the image, exposing the surface of the drum so it can receive toner.
The laser/scanner system consists of the following main components:
●
Laser assembly
●
Scanner motor assembly
●
Beam detect (BD) sensor
●
Scanner mirror
Figure 1-8 Laser scanner
Laser ass’y
BD sensor
Scanner mirror
Scanner motor ass’y
Photosensitive drum
DC controller
ENWW Laser scanner system 19
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