the scanner mirror that is rotating at constant speed. The laser beam is reflected by the scanner mirror,
passes through the lenses, and scans on the photosensitive drum.
Figure 1-24 Laser/scanner system
BD PCA
Scanner mirror
Scanner motor unit
Photosensitive drum
Laser driver
Formatter
DC controller
LASER CONTROL signal
VIDEO signal
SCANNER MOTOR
SPEED CONTROL signal
BD INPUT signal
The laser scanner uses two laser diodes to scan two lines simultaneously, producing high-speed laser
scanning. After receiving the print command from the host computer, the DC controller PCA activates
the scanner motor, which rotates the six-sided scanner mirror. The laser-driver PCA emits light from the
two laser diodes according to signals from the DC controller PCA. The two laser beams strike the six-
sided scanning mirror and are directed through the focusing lenses and onto the photosensitive drum.
ENWW
Laser/scanner system
29
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