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What are the methods for detecting PCB boards?

2019-11-08 22:58:35 Juding Circuit Technology 321

What are the methods for detecting PCB boards?


The principle of PCB board inspection and the principle of computer inspection are almost the first to look at the post-test, and the first is easy. What are the methods for detecting PCB boards? Please look down.


the first:

Visual inspection, understanding the fault phenomenon through visual inspection, understanding the fault phenomenon will help to analyze the fault in the next step. The analysis process includes asking, watching, smelling and measuring. The question is to ask the user about the fault, whether it is caused by improper use or a sudden fault in normal operation. Also, ask if the board has been repaired by others before and how many components have been moved.


second:

Look at it by carefully observing the electronic components to see if there is any obvious discoloration, burning signs, whether there is a phenomenon of virtual welding, welding and so on. If necessary, you can observe it with the aid of a magnifying glass.


third:

Smell, smell a smell, once the integrated circuit (especially high-power devices) is burnt out, it will smell the smell of eggs.


fourth:

The measurement is measured, and the faulty device is analyzed by measurement, and the static measurement (ie, the unpowered measurement board) and the power-on measurement are measured.


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