| 故障分析与检修：上门有一T21SK076用户反映该机不定时开不了机。开机测B+电压在70V左右摆动。断开负载B+故障依旧，测各相关稳压电路未发现有问题。代换电源部分元件，当换到TDA168462脚到地电容C913时，故障机修到这里，终于修好值得探讨。，拆下的820P电容测不出问题。 |
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