开机任何操作无反应,显示屏无显示,经查保险没烧,表面看没其他元件烧坏,也没闻到烧焦的味道,水泥电阻正常,300伏直流电压正常。经测开关电源没有工作,30伏电压,5伏电压无输出。求助!(电源IC是7M0880) ...
|小黑屋|手机论坛|Archiver|缝纫客,工业缝纫机维修问答
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