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晶体管的检测是家电检修过程中必不可少的工作,其在线检测以快捷方便倍受欢迎,但是也只有使用万用表才能充分体现这一优越性。晶体管在线检测的原理是当外电路对测量结果不足以造成影响时在线检查晶体管的PN结特性,即单向导电性。晶体管PN结两端加正向电压时,硅管PN结正向压降为0.6～0.8V,锗管PN结正向压降为0.2
The detection of the transistor is an indispensable work in the process of appliance repair. Its on-line testing is very popular for quick and convenient detection, but it can only fully demonstrate this superiority by using a multimeter. Transistor on-line detection principle is that when the external circuit on the measurement result is not enough to make an impact on-line check transistor PN junction characteristics, that is unidirectional conductivity. Transistor PN junction plus forward voltage across the silicon tube PN junction forward voltage drop of 0.6 ~ 0.8V, germanium PN junction forward voltage drop of 0.2