一台松下(乐声)EK—2076EBB型BP机,将功能开关置于“M”位置时,接收信号时不振动,其它功能均正常。该机振动原理如下:当开机后将功能开关置于“M”位置接收到信息时,BP机会产生振动。该部分电路比较简单,由集成块U1(HD40L4818A33H)第(78)脚输出高电平(3V)或低电平(0V),通过一只10Ω电阻控制一只上标“2AD”的PNP型三极管的截止和导通,导通时为机内电机提供驱动电 A Panasonic (music) EK-2076EBB BP machine, the function switch is set to “M” position, the signal does not vibrate when receiving, the other functions are normal. The machine vibration principle is as follows: When the power switch will be set to “M” position after receiving information, BP opportunity vibration. This part of the circuit is relatively simple, the output of high (3V) or low (0V) output from the (78) pin of the integrated block U1 (HD40L4818A33H), through a 10Ω resistor control a superscript “2AD” PNP type transistor Of the cut-off and conduction, conduction for the motor to provide the drive motor