首先更换TDA8362(35)脚上4.43MHz晶振无效,逐一测量与解码部分有关的引脚,最后测得(33)脚电压为2V左右,低于标准电压4.4V,经检查发现C370电容漏电,换上同规格电容后故障排除.(33)脚为APC检波. |
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