KPOWERSCIENCE KP3828 Series, Maintenance Manual

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2-4
2-1-3 LED Array
When the drum, which has been positively and uniformly charged in the
main charging step, is exposed to light, the photosensitive film in an
exposed area goes into conduction so that the charge in the exposed area is
neutralized.
Fig.2-4
The LED array according to the image data fed from the host computer
illuminates and rotates the drum to form an electrostatic latent print image
on the positively charged drum surface.
The LED array consists of LED elements that are arranged in the direction
of printing width and related to printing pixels on a one-to-one basis. It
converts one raster (horizontal scanning line) of image data into a row of
illumination dots.
Fig.2-5
Non-exposed
Exposed
Toned
550V
100V
LED array
OPC drum
Electrostatic latent image