Canon MF6530 Service Manual - Page 94
Main Components - printer drivers
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Chapter 5 5.1.2 Main Components 0011-3548 The laser scanner unit consists of the following major components: - laser unit, which serves as the source of laser beam. - laser scanner motor, equipped with a 4-face mirror for laser scanning. - laser driver/BD PCB used to detect laser beam or to control emission of laser beam. The laser beam generated by the laser unit based on the signals from the DC controller PCB moves through the collimator lens (inside the laser unit) and the cylindrical lens to reach a 4-face polygon mirror rotating at a constant speed. When reflected by the 4-face polygon mirror, the laser beam moves through the imaging lens, and is bent by the reflecting mirror to reach the photosensitive drum. At this time, the laser beam also is directed to the BD circuit of the laser driver/BD PCB. As the 4-face polygon mirror rotates at a constant speed, the laser beam scans the surface of the photosensitive drum at a constant speed, thereby removing charges and forming static images. - copy image data - print image data (if equipped with printer functions) - fax image data (if equipped with fax functions) Image processor PCB Horizontal sync signal (BDO*) Laser driver control signal (CTRL0, CTRL1, CTRL2 Communication control Laser scanner motor drive signal (ACC*) DC controller PCB Image signal (VDO,VDO*) Lsaigsnear lb(eBaDmI*d)etection BD block Laser driver/BD PCB Cylindrical lens 4-face mirror Laser scanner motor Photosensitive drum F-5-1 5-2
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