CD、VCD的激光头属于易损元件,在检修CD、VCD机中其故障率较高,下面简要介绍其检测、判断和维修的方法。 由于前期的VCD机和CD机的激光头完全相同,后期的VCD机在激光头上作了一些改进,如将电流型改成电压型,将单光束的改为三光束的等,但CD机和VCD机激光头的基本结构和原理还是差不多,故将CD机和VCD机的激光头一并进行说明。 一、检测 正常的激光头能上下聚焦和发出激光,在开启电 CD, VCD laser head is a vulnerable component, the overhaul CD, VCD machine failure rate is higher, the following briefly describes its detection, judgment and maintenance methods. As the previous VCD and CD machine laser head exactly the same, the late VCD machine made some improvements in the laser head, such as the current type into a voltage type, the single beam to three beams and so on, but the CD player And VCD laser head of the basic structure and principle is similar, so the CD player and VCD laser head together to explain. First, the detection of normal laser head can focus and laser up and down, open the electricity