PCBA Tech - PCBA board test method

PCBA board test method
At present, the country has higher and higher requirements for environmental protection and greater efforts in link governance. This is a challenge but also an opportunity for PCB factories. If PCB factories are determined to solve the problem of environmental pollution, then FPC flexible circuit board products can be at the forefront of the market, and PCB factories can get opportunities for further development.
The current PCBA board test methods mainly include the following five:
1. Test method for manual visual testing of PCBA board

Manual visual testing is to confirm component placement through human vision and comparison. This technology is one of the most widely used online testing methods. But with the increase in output and the shrinking of circuit boards and components, this method is becoming less and less applicable. Low up-front cost and no test fixture are its main advantages; at the same time, high long-term cost, discontinuous defect detection, difficulty in data collection, no electrical testing and visual limitations are also the main disadvantages of this method.

2. Automatic optical inspection (Automated Optical Inspection, AOI) PCBA board test method

This kind of test method is also called automatic visual test. It is usually used before and after reflow. It is a newer method of confirming manufacturing defects. It has a better effect on the polarity of components and the existence of components. It is a non-electrical, fixture-free online technology. Its main advantages are easy follow-up diagnosis, easy program development, and no fixture; the main disadvantage is poor short-circuit recognition, and it is not an electrical test.

3. Functional Test (Functional Test) PCBA board test method

Functional test is the earliest automatic test principle. It is a basic test method for a specific PCBA or a specific unit, which can be completed by various test equipment. Functional testing mainly includes final product test (Final Product Test) and the latest physical model (Hot Mock-up).

4. Flying-Probe Tester PCBA board test method

Flying probe tester, also called probe tester, is also a commonly used test method. Due to advances in mechanical accuracy, speed, and reliability, it has been generally welcomed in the past few years. In addition, the current requirements for a test system with fast conversion and no fixture capabilities required for prototype manufacturing and low-volume manufacturing make flying probe testing the best choice. The main advantage of the flying probe tester is that it is the fastest Time To Market tool, with automatic test generation, no fixture cost, good diagnosis and easy programming.
5. Manufacturing Defect Analyzer (MDA) PCBA board test method

MDA is a good tool for diagnosing only manufacturing defects in a high-volume/low-mix environment. The main advantages of this test method are low initial cost, high output, easy follow-up diagnosis and fast and complete short-circuit and open-circuit tests; the main disadvantage is that functional tests cannot be performed, usually there is no test coverage indication, fixtures must be used, and the test cost is high. .

Shenzhen Electronics Co., Ltd., established in Shenzhen in 2003, has been working hard in the electronic product EMS manufacturing industry for more than 10 years, focusing on providing professional electronic product processing, patch processing, plug-in processing, OEM, ODM foundry service.

Our factory covers an area of 5,000 square meters and has more than 260 employees. There are 8 SMT patch lines, 1 DIP assembly line, 2 rear welding lines, 1 assembly line, and 2 test lines; we can provide customers with professional SMT chip processing|DIP plug-in processing, post-welding processing, PCBA assembly, complete product assembly, testing and maintenance and other comprehensive services