Chapter 55-25.1.2 Main Components 0011-3548LaserBase MF6530 / / LaserBase MF6540PL / LaserBase MF6550 / KaserBase MF6560PL / / LaserBase MF6580PLThe 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 cylin-drical 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 chargesand forming static images.F-5-1Laser driver/BD PCBCylindricallensLaser scanner motor4-face mirrorBD blockPhotosensitive drumImage processor PCBLaser beamdetectionsignal (BDI*)Laser scanner motordrive signal (ACC*)Laser drivercontrol signal(CTRL0, CTRL1,CTRL2Image signal(VDO,VDO*)Horizontal syncsignal (BDO*)CommunicationcontrolDC controller PCB- copy image data- print image data(if equipped with printer functions)- fax image data(if equipped with fax functions)Download Free Service Manual And Resetter Printer at http://printer1.blogspot.com
