检修过程:开机发现Q605(13007)烧炸,行管Q302(C2499)短路,于是便换上两管,开机,又是一闪.Q605与Q302又完了. 断开负载,接上100W的灯泡,更换Q605.还有A1013(Q605边).开机,灯泡很亮.换上C609.C610(47UF 50V)后开机,电源正常.换上行管试机,图像正常,但是没有伴音,换上IC401(TDA1905)和供电电阻R401(1.5欧姆 1W)后正常! 小节:不查电压高低就代换元件,损失惨重! 出处! |
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