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音響擴大機

Dec 11th 2013, 08:59

擴大機保險絲燒毀(更換後一樣燒毀)
換保險絲(3A)結果電阻燒毀水泥電阻短路(有四組電阻水泥電阻期中一組功率晶體四個 )
電阻水泥電阻保險絲更換後保險絲依然燒毀
用三用電表測量有兩組功率晶體指針只動不到三分之一其它兩個功率晶體都超過一半以上
請問還留意那些電子零件?
功率晶體不正常或短路是不是保險絲燒毀的主因?
是不是更換功率晶體就好了呢?

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