What are the common PCBA functional tests?

   For the electronics manufacturing industry, PCBA (Printed Circuit Board Assembly) is a necessary link, and its indispensable part is the functional test. Functional test is a very important step to ensure product quality, what is its role? Next, DYC will explore in depth what are the common PCBA functional tests.

   PCBA functional test is carried out to ensure the electrical performance and functional stability of the product. In the production process, the use of reliable PCBA functional test can detect the defects and faults of the circuit board as early as possible, thus ultimately improving the quality and reliability of the product. At the same time, after the PCBA functional test, the stability of the product can be guaranteed, so as to ensure that the defective rate of production is close to 0%. In the PCBA functional test, a series of test methods and tools are usually used. The following are a brief introduction to several common test methods:

1. Point test:

   Point test is a traditional circuit board test method. The method requires a group of metal needles or sensors to detect the connectivity and insulation on the circuit board. In which, the tester controls the movement of these needles or sensors through a computer program, so as to test the functions of the PCBA.

2. Flying needle test:

   Flying needle test is an automated test method, which can test multiple circuit boards at a time. This method uses a robotic arm or other mechanical devices to accurately locate and measure the electrical performance of the circuit board. Through this method, the test efficiency of PCBA can be improved.

3. Boundary Scan Test:

   Boundary scan test uses a special test stand built into the chip to test the external interface of the circuit board. This method is especially suitable for testing complex circuit boards, such as those used for communication or automatic control.

4. Surface Mount (SMT) Test:

   SMT test can effectively test the surface mount components on the circuit board, such as chips, capacitors, resistors, etc. In addition, when conducting surface mount test, it can also check whether the solder joints on the circuit board are in good condition.

5. Functional Test:

   Functional test is one of the most commonly used circuit board test methods. This method verifies whether the functions of the circuit board are normal by simulating the operation of the circuit board under actual use conditions. For example, the functional test of a PCBA-based TV includes the on, off, volume control, channel control, etc.

DYC have a free team of engineers to help analyze online, which can design test methods and make test Jig according to customer requirements. It can also arrange the tools and steps of the test according to the test instructions given by the customer. This is a great advantage of our factory. We have already appointed simple, convenient and effective test methods for many customers. We will only rest assured when the products are delivered to customers after passing the test. In a word, the above are several common PCBA functional test methods, each of which has its own unique advantages and disadvantages. When conducting PCBA functional test, it is necessary to adopt appropriate test methods according to the actual situation and make adjustments and improvements according to the test results.