請大家幫忙看看,這電源打不起高壓是怎麼回事?(有圖)

現在我是輸入線短路對輸出線短路,打3000VAC/10mA,
打高壓時不會報警,但線板下能看到電火花,是輸出端
底層銅皮處能看到火花,如圖紅線圓處.

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