当电路中出现自激,杂波干扰等软故障时,使用一只电容跨接在三极管的基极或集电极之间,或者把电容跨接在可疑电路的输入端或输出端与地之间,将信号直接对地短路;或者把电容跨接在信号的输入与输出端之间,若此时故障消失,则表明该级电路有故障,再用其他方法进一步检测故障电路,就能迅速攻克故障机。维修实践表明,“短路试验法”使用的电容,一般在高频电路部分用0.01μF的电容,而在低频电路部分 When the circuit appears a self-excitation, clutter and other soft faults, the use of a capacitor across the base or collector of the transistor, or the capacitor across the suspect circuit input or output and ground , The signal directly to the ground short circuit; or the capacitor across the signal input and output terminals, if the fault disappears at this time, indicating that the level of circuit failure, and then use other methods to further detect the fault circuit, you can quickly overcome Failure machine. Repair practice shows that the “short-circuit test method,” the use of capacitors, the general high-frequency circuit with 0.01μF capacitor, and in the low-frequency circuit part