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求助:VCA810不工作,可能是什么问题?

电路图用的datasheet里这个:

原理图,PCB如下:

±5V供电,控制电压也用的直流稳压电源,正极接地,负极接Vc。

输入信号300mV,500kHZ,输出全无信号,基本没反应,万用表检查焊接无问题,请问可能是哪里出了问题?