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 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 Formatter DC controller MOTOR signal signal signal signal CONTROL CONTROL VIDEO INPUT SCANNER BD SPEED LASER Scanner motor unit Laser driver Scanner mirror BD PCA Photosensitive drum