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LZ不妨将R134与B8断开，然后测量R134左端的波形
C2去掉波形正常吗？
C2去掉之后波形正常。
信号是从R134右端输入的，若去掉R134，左端应该就没有信号了！
请移驾看看全部的波形：
http://www.deyisupport.com/question_answer/analog/f/60/p/99992/263728.aspx#263728
谢谢！！！
