[讨论]怎样查找脉冲线？？

小弟是新手请高手大哥们指点，用万能表可以查吗？具体该怎样查请大哥们指点！！！<img src="images/post/smile/dvbbs/em89.gif" /><img src="images/post/smile/dvbbs/em89.gif" />

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