用万用表测量集成电路各脚对地的电阻值,然后与正常值比较,常可判断出异常的部位。当然,采用这种电阻测量法需事先知道集成电路各脚对地的正常阻值。在测量电阻时,将万用表表笔正反交替测出结果,即先用红表笔接地,黑表笔测出一个阻值;再用黑表笔接地,红表笔测出另一个结果。将这两次测得的电阻值与正常电阻值进行比较,就可以找出异常 With a multimeter to measure the integrated circuit resistance of the feet on the ground, and then compared with normal, often can determine the abnormal site. Of course, the use of this resistance measurement method needs to know in advance the normal resistance of IC feet to ground. In the measurement of resistance, the positive and negative multimeter table pen alternately measured results, that is, first with the red pen grounding, black pen measured a resistance; then black pen grounding, red pen measured another result. The two measured resistance values ​​compared with the normal resistance, you can find out the anomaly