创维39E580F(8A08机芯)液晶电视主板电压低无法开机 检查电源板保险丝F1烧断发黑,测量PFC输出端C31、C32对地电阻很小,拆下C31、C32测量未见异常,断开主电源厚膜电路IC6的①脚后,测量C31、C32的对地电阻恢复正常,测量IC6的①脚内部开关管击穿。检查IC6及其外部电路,发现①脚外部的电容骸C44颜色变深,⑨脚外部的D14击穿、电阻R48烧断。更换Fl、C44、Dl4、R48和IC6(FSFR1700XSL)后,故障排除
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