1、用数字万用表二极管档正向测量5N60C的D-S两极。首先将万用表量程开关调至二极管档,将5N60C的G极悬空,用红黑表笔分别接触5N60C的D-S两极,若是好的管子,万用表显示为“OL”,即溢出。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/908fa0ec08fa513d69378d1d336d55fbb3fbd950?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
2、然后调换红黑表笔,再去测量D-S两极,则万用表显示的读数为一个硅二极管的正向压降。若MOS场效应管内部D-G两极之间的寄生二极管击穿损坏,用二极管档测量时,万用表显示的读数接近于零,完好时显示压降。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/bf096b63f6246b606af253b7e5f81a4c500fa271?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3、用万用表电阻档实测5N60C的D-S两极之间的正向向电阻为155.4Ω。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/377adab44aed2e73a51d67ef8901a18b86d6fa79?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
4、将红黑表笔调换,用万用表电阻档实测5N60C的D-S两极之间的反向向电阻为67.2Ω。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/1c950a7b02087bf44b00b62afcd3572c10dfcf01?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)