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TAS5630B,工作异常



目前有几块坏板子和好板子,坏板子--上电后SD OTW管脚加3.3V上拉后电平为2.7V,如果不加上拉上电后SD OTW加电平为1.22V。好板子--上电后SD OTW管脚加3.3V上拉后电平为3V,如果不加上拉上电后SD OTW加电平为0.66V,目前不知道是哪个管脚导致这种异常现象?