What are the common methods of PCB circuit board inspection?
Release time:
2023-04-06
After the PCB circuit board is done, it is inevitable that there will be failures and performance problems, which involves PCB circuit board detection. So, what are the common methods of PCB circuit board detection?
After the PCB circuit board is done, it is inevitable that there will be failures and performance problems, which involves PCB circuit board detection. So, what are the common methods of PCB circuit board detection?
PCB circuit board inspection
1. Appearance inspection method
Check whether the circuit board is burnt, whether the copper is broken, and whether the circuit board has odor; Whether there is moldy black phenomenon in the bad place of welding, interface and gold finger, etc.
2. Principle analysis
Analyze the principle of the circuit board, some PCB boards do not need drawings can also know its working principle and details.
3. Contrast method
The comparison method is one of the most common ways to detect a circuit board without a drawing, and by comparing the status with a well-functioning circuit board, faults can be quickly identified.
4. Return to the circuit
This method can achieve 100% accuracy, but there are many integrated circuit models tested, and the packaging is complex, so it is difficult to set up a set of circuits for all integrated circuits.
5. The status method
The status method is to check the normal working status of each component, and if the working status of the component does not meet the normal state, then there is a problem with the device or its affected parts.
6. Pass the kill method
All components are inspected once until the faulty component is found for repair purposes.
The above is the common method of PCB circuit board detection, I hope to help you.
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