191问答库 > 急！！！！！急21寸的杂牌电视机出现行场不同步的故障，就如图片中显示的那样；主板芯片是LA7693

急！！！！！急21寸的杂牌电视机出现行场不同步的故障，就如图片中显示的那样；主板芯片是LA7693

2025-03-16 08:32:51
推荐回答（1个）
回答1：

貌似AFC电路有问题，也就是自动频率控制电路有问题；但是不一定是’电路‘问题、可能是AFC中周’失谐‘问题，记住磁芯原位置【不是他的问题需要返回原点】、使用无感工具调节试试看。

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