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断开开/关机控制电路与微处理器“!#脚连接的电阻RA33,将RA33接地,为电源控制电路送入低电位强行开机,此时电源输出的+B电压为125V正常,同时有行扫描工作和高压建立的声音,但由于微处理器未进入工作状态仍机器“三无”。检查微处理器电源、复位、晶振全部正常,测量矩阵电路也未
Disconnect the on / off control circuit from the microprocessor RA33, connect the RA33 to ground, power-on the control circuit for low power, then the + B voltage of the power supply is normal at 125V, Line scan work and the establishment of high-pressure sound, but because the microprocessor did not enter the working state is still the machine ”three no." Check the microprocessor power supply, reset, crystal all normal, the measurement matrix circuit