例1 故障现象;放入碟片后检索不出曲目,按下PLAY键无反应,约10s后显示“NO DISC”。分析检修:打开机壳,检查激光管无激光发出,同时发现激光头组件未能到位,限位开关“托盘进”的簧片未通,导致激光头径向滑行驱动电路不工作,造成零位检测开关不通,不能进入下一程序启动激光管。用手指轻轻地将激光头支架上托,使“托 Example 1 Symptom; After the disc is loaded, no tracks can be retrieved. Pressing the PLAY button will cause no response. After about 10 seconds, “NO DISC” will be displayed. Analysis and Maintenance: Open the case, check the laser tube no laser issue, and found that the laser head assembly failed to place the limit switch “tray into” the reed did not pass, leading to the laser radial slide drive circuit does not work, resulting in zero Detection switch barrier, can not enter the next procedure to start the laser tube. Use your fingers gently on the laser head bracket, so that "care