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PCBA Tech

PCBA Tech

PCBA Tech

PCBA Tech

How to do reliability test on PCBA board
2021-08-24
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Author:Kyra

How to do reliability test on PCBA board
In SMT chip processing, if any material problems occur, the quality of the PCBA board will be affected. So how to do it? This requires us to have strong material testing capabilities, supplier management capabilities, technical analysis capabilities, and reliability testing capabilities.
According to Baiqiancheng's past experience, reliability testing is often ignored by PCBA processing manufacturers. They believe that as long as the PCBA board is tested without problems, it will be accepted by the end customer. As everyone knows, many PCBA boards have fatal defects such as short service life and instability in terminal products. This is also the result of the PCBA factory not doing strict reliability tests. Let's take a look at how to do reliability testing on the PCBA board shared by Baiqiancheng Electronics
 How to do reliability test on PCBA board

PCBA processing

How to carry out the reliability test of PCBA board?
One. Aging
Place the PCBA board with OK test function under specific temperature and humidity conditions, perform repeated power on and off, simulation function operation, load operation, etc., and check the stability of the PCBA board through 24 to 72 hours of continuous work. Because the aging test takes a long time, it does not have the possibility of large-scale batch operation. In the actual process, the aging test is only a sample test, and the overall yield rate of this batch of products is judged by the qualified rate of the random test.
Two. Vibration test
When many PCBA boards are delivered to customers, there are often some problems caused by vibration during transportation, such as component shedding and pad cracks. Through the vibration test, the vibration effect during transportation can be effectively simulated in the laboratory, and the hidden dangers in the welding process are gradually exposed. In this way, batch welding defects are avoided to the greatest extent, and the overall yield rate of delivery is improved. At present, there are professional analog motion vibration workbenches on the market, and the price is not high, you can purchase one for 5,000 yuan.
Three. Surge test
In the process of PCBA processing, it is often OK to work under normal voltage, but occasional defects in a certain surge. Many circuit designs are not perfect. They often fail to consider the fatal impact of instantaneous voltage or current impact on the entire circuit. This requires us to conduct sampling surge impact experiments before the mass production of PCBA.
 Four. Packaging test
This test is often overlooked by everyone, resulting in a very funny problem: We spent a lot of energy to make the PCBA board perfect, but we lost in the last link of packaging and transportation. The factory should simulate the packaging form of the PCBA board for proper drop test