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san yang ji guang chang ji chang jian gu zhang jian xiu
Author(s): 
Pages: 43
Year: Issue:  2
Journal: Family Electronics

Keyword:  激光头伺服电路碟片微处理器循迹音频电路故障检修故障现象音频信号驱动电路;
Abstract: <正> 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
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