三角HS-18B电磁炉维修：唧唧会响的故障

开机时一切正常，但是锅放上烧后会唧唧会响，大概间隔10秒钟时间响一次。上面板换了74HC164没用，还有主板2个大功率的集成块用万用表量也好，所有的三极管和二极管都好的。3个芯片对地都不短路，主板跟上面板连线良好。我搞不懂啦，哪里出故障，不会是主芯片吧。请教大虾。多多谢谢了

  

是一个电阻烧坏了。还有一个扼留圈断了

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