| 正常时，光头支架在加载电机作用下进行抬升，当到位后经检测开关检测，ＣＰＵ发出停止加载→循迹电机动作→激光头启动，进而完成碟片检测。该机在加载到位时不停，首先应怀疑升降检测开关失效。经检测发现该开关三点之间均有较大zuzhi阻值，用一新碰碰开关代换后，【故障】排除。 |
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