Functional Overview
Image Formation System
Writing Stage
At the writing station, the laser beam is used to discharge the
photosensitive drum’s negative potential by focusing laser light
onto its surface. This creates a latent electrostatic image, which
later is developed into a visible image.
Laser light is produced by a small modulated laser diode. The
beam created by the diode shines onto a rotating polygonal mirror.
As the mirror rotates, the beam reflects off the mirror and sweeps
the page from left to right (see Figure 5-13).
Bi-tronics 1/0
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Formatter PCA
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/BD /VDO
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DC Controller PCA
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/VDOUT APCSH /SCNON
LaserlScanner
Photosensitive
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Image Writin{g
5-27
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