How does the third-party testing organization test the reliability of PCBA?

Date：2021-09-17 18:12:29Views：1174

PCBA test is an important part of controlling product quality in PCBA process. In order to ensure the quality of PCBA, it is necessary to carry out corresponding PCBA reliability test, so PCBA reliability test is particularly important. There are many contents of reliability test. Next, I'll give you a brief introduction.

The general PCBA reliability test is divided into ICT test, FCT test, fatigue test, simulated environment test, aging test, high and low temperature test, drop test and so on.

1. ICT test:

ICT test is mainly the test of component welding, circuit on-off, voltage and current values, fluctuation curve, amplitude and noise.

2. FCT test:

The FCT test needs to burn the IC program, then connect the PCBA board to the load, simulate the user input and output, test the function of the PCBA board, find the problems in the hardware and software, realize the joint debugging of software and hardware, and ensure the normal front-end manufacturing and welding.

3. Fatigue test:

The aging test is mainly to sample the PCBA board, simulate the high-frequency and long-time operation of the function used by the user, observe whether there is failure, and judge the probability of failure in the test, so as to feed back the working performance of PCBA board in electronic products.

4. Simulated environment test:

The simulated environment test is mainly to expose the PCBA board to the temperature, humidity, drop, splash and vibration of the limit value, and obtain the test results of random samples, so as to infer the reliability of the whole batch of PCBA board products.

5. Aging test:

Aging test is a long-term power on test of PCBA board to simulate the use of users, keep it working and observe whether there are any failure faults. Only after aging test can electronic products be sold in batches.

6. High and low temperature test

Customers with this testing demand will provide professional testing rooms for their products, and provide targeted testing services in common temperature zones such as - 40 ℃ to 100 ℃, so as to fully simulate the ambient temperature of the products and maximize the reliability of the products.

7. Drop test

Place PCBA at a certain height for free drop to test the welding firmness of PCBA.

According to different PCBA board products, the reliability required will be very different, and specific problems need to be analyzed.

Function test of PCBA

1. Power part test - whether the power supply works normally, test the voltage at each point - use a comparator or other.

2. Port (Interface) test, whether there is short & open, resulting in an exception.

3. IC module ICI / O read / write function test - Flash & EEPROM & CPU & SDRAM & logicicetc.

4. Special function test (different circuit boards have different requirements) - if there is infrared, an external receiver is required.

The above is the related content of "PCBA reliability test" brought by the core test. Through this article, I hope it can be helpful to you. If you like this article, you might as well continue to pay attention to our website, and we will bring more wonderful content later. If you have any needs related to the inspection and testing of electronic products, please call Chuangxin testing, and we will serve you wholeheartedly.