由于激光头组件和引线不良引起的“马赛克”故障较为常见,一般的维修方法是先清洁、调整激光头组件,看故障能否排除,若故障依旧,最好用一正常的激光头进行替换试验,如果故障仍在,应检查激光头的排线是否良好,位置是否正常。一般的组装VCD机其激光头输出通过软线连接到RF放大器,此线容易感应各种杂波和干扰。经过屏蔽后,干扰是没有了,但由于屏蔽线的分布电容会使检测脉冲波形失去陡削的边缘,对边缘的判别十分不利,如KSS210激光头,该激光 Due to poor laser head assembly and lead “Mosaic” fault is more common, the general maintenance method is to clean, adjust the laser head assembly to see if the fault can be ruled out, if the fault persists, it is best to use a normal laser head Replace the test, if the fault is still, you should check the laser head cable is good, the location is normal. The general assembly of VCD machine laser head output through the cord connected to the RF amplifier, this line is susceptible to all kinds of clutter and interference. After shielding, the interference is gone, but because of the distribution of shielded capacitance will make the detection pulse waveform loss sharp edge, the edge of the discrimination is very unfavorable, such as KSS210 laser head, the laser