Laser/scanner assembly
The laser/scanner produces the latent electrostatic image on the photosensitive drum in the print
cartridge. The main components of the laser/scanner assembly are the laser driver PCA, the scanner
motor, various mirrors, and the focusing lenses.
Figure 5-4 Laser/scanner assembly
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
112 5 Theory of operation
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