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例1 故障现象:三洋CP—M9325型激光唱机放入碟片后,不能正常选曲,也无曲目显示。分析检修:根据故障现象判断,可能是激光头及驱动电路有故障。先放入碟片开机检查,发现激光头能在引导区附近移动,也能上下聚焦。而一般情况下激光头检索循迹时,如横向移动超过循迹伺服电路所能控制的范围,进给电机动作,将激光头拖到需要的地方,激光头才能正常检索或重放。而该机激光头只能
Example 1 Symptom: Sanyo CP-M9325 type disc player into the disc, the song can not be normal, there is no track shows. Analysis and maintenance: According to the phenomenon of failure to judge, the laser head and drive circuit may be faulty. First put the disc boot check and found that the laser head can move around in the guide area, but also from top to bottom focus. Under normal circumstances, the laser head search tracking, such as horizontal movement beyond the tracking servo circuit can control the range, the feed motor action, the laser head to the required place, the laser head to normal retrieval or playback. The laser head only