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例1 机型:金正SVCD—N108D型VCD视盘机故障现象:装入光盘后显示无盘,观察主轴不转动。故障分析:由于其他功能正常,因此判断故障部位在激光头和伺服板上。故障检修:观察激光头运作情况;激光头径向内移,物镜也有上下三次搜索动作,并且有红色激光射出,说明激光头工作条件基本具备。放入一张光盘,待入仓到位后用手指拨动一下压片盘,有时主轴能转动,并能读出总时间,再进入播放。检查主轴电机及驱动电路正常,当无意将机芯倒置着播放时发现一切正常,故怀疑聚焦线圈驱动电压不足,使在正放时聚焦线圈
Example 1 Model: Kim Jung SVCD-N108D-type VCD disc drive Symptom: After loading the disc shows diskless, observe the spindle does not rotate. Failure Analysis: As other functions are normal, so determine the fault location in the laser head and servo board. Troubleshooting: observe the operation of the laser head; laser head radially inward, the objective lens also search up and down three times, and there is a red laser shot, indicating the working conditions of the laser head with. Into a CD-ROM, to be placed in place after the finger dial to dial tablets, and sometimes the spindle can rotate, and can read the total time, and then enter play. Check the spindle motor and drive circuit is normal, when the movement is not intended to be inverted upside down found everything is normal, it is suspected that the focus coil drive voltage is insufficient, so that the focus coil