转修机，客户说老是烧场扫描TDA3654.修好了就只看一会就烧.打开后盖,测场输出中点电压高达20伏,场输出电源高达35伏.后测电源电压高达175伏.更换电源部分电解电容.换上场块TDA3654后正常. |
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