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msp430f5529口袋板的tpa2006d1



老师您好!我现在正在用msp430f5529lp和口袋板做实验,在进行音频回放时,把DAC-OUT输出加在了P-AMP_IN上,然后把4欧姆0.5瓦的喇叭加在VO+和VO-端口,喇叭没有声音,用示波器测量V0+和VO-之间的波形,在示波器上不显示波形,这是什么原因呢?难道是口袋板上的tpa200d1芯片坏了么?开发板是新的,有知道是什么原因的么?帮忙解答下,十分感谢!