影碟机的激光头由激光二极管、光学组件、光电接收二极管和驱动、伺服机构等组成。当影碟机出现不能放像或声图不清、循迹伺服不良和保护性停机等故障时,准确识别激光头的故障性质及部位,有助于对症下药,尽快排除故障。一、故障判断正常的激光头应射出红光束,在通电瞬间组件前后移动一下,并且有上下聚焦搜索动作,否则表示激光 The DVD player’s laser head by the laser diode, optical components, photodiode receiver and drive, servo and other components. When the player can not play or sound image is not clear, poor tracking servo and protective shutdown and other failures, the exact identification of the nature and location of the laser head fault, help remedy the problem, troubleshooting as soon as possible. First, the fault diagnosis Normal laser head should be shot red beam, moving the components in the power before and after the move about, and there are up and down focus search action, or that the laser