Engine laser/scanner system
The laser/scanner system forms the latent electrostatic image on the photosensitive drums inside each of the
toner cartridges.
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 main components of the laser/scanner system, which are controlled by signals sent from the DC
controller, are:
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Laser assembly
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Scanner motor assembly
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Beam detect (BD) sensor
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Scanner mirror
Figure 1-8 Laser/scanner system
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