The production of PCB is not difficult, but the difficulty lies in the troubleshooting after production. So, what are the methods to find PCB faults?

Common PCB circuit board faults mainly focus on components, such as capacitors, resistors, inductors, diodes, triodes, field effect tubes, etc., and obvious damage to integrated chips and crystal oscillators. The more intuitive way to judge the faults of these components can be observed through the eyes. There are obvious burning marks on the surface of obviously damaged electronic components. This kind of fault can be solved by directly replacing the problem components with new ones.

Of course, not all damage of electronic components can be observed with the naked eye and need to be repaired with the help of professional inspection tools. Common inspection tools include multimeter, capacitance meter, etc. If it is detected that the voltage or current of an electronic component is not within the normal range, it indicates that there is a problem with the component or the previous component. Replace it directly and check whether it is normal.

Sometimes when we add components to PCB, we will encounter the situation that the problem can not be detected, but the circuit board can not work normally. In this case, most of the time, the performance of components may be unstable due to the coordination of various components during installation. In this case, you can try to judge the possible fault range according to the current and voltage to minimize the fault area. The only way is to try to replace the suspect component until the problem component is found.

All the above are problems of electronic components. Since the PCB circuit board is the foothold of components, the circuit board fault must also exist. For example, due to the manufacturing process of tinned parts, there may be wire breakage in the process of PCB corrosion. In this case, if it is impossible to repair the wire, it can only be solved with thin copper wire flying wire.