例1:一台松下333型三碟连放VCD播放光盘机,有时正常,有时异常。该故障夏季较冬季严重,虽经过多人维修,故障终未排除。检修:打开机壳,拆去夹持器及支架,打开电源开关,按“出/入仓”键,待托盘到达机内播放位置后,空载观察激光头组件工作情况,发现激光头有时在某个盘位能发射激光,有时在三个盘位上都不发射激光。仔 Example 1: A Panasonic 333 three-disc player VCD player CD player, sometimes normal, sometimes abnormal. The failure of the summer than winter serious, though after more than maintenance, the failure has not been ruled out. Maintenance: open the case, remove the holder and bracket, turn on the power switch, press “out / warehouse ” button until the tray reaches the machine playing position, the empty load observation laser head assembly work and found that the laser head Sometimes a launcher can emit lasers, and lasers are sometimes not fired on all three lanes. kid