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LMG1205: 输出不正确

Part Number: LMG1205

一路互补的PWM输入给电阻的R4和R5,输入频率是1MHz,用示波器测试,测试点J6只是一个高电平,测试点J10是正常的PWM输出。用钢网焊接的芯片和手焊的芯片都出现同样问题,PCB画的是4层,布局基本是按LMG1205HBEVM布的局,帮指点下可能是什么原因哪?