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What’s the difference between ICT testing and FCT testing?
Author:
The ICT test is an online test primarily used to check whether the circuit functions of electronic components on the PCBA board are functioning normally.
1. Understand ICT testing
The ICT test is an online test primarily used to detect abnormalities in the circuit functions of electronic components on a PCBA board, such as open circuits or short circuits. To perform an ICT test, test points must be pre-installed on the components. During the test, the probe needles of the testing instrument must accurately align with these component test points. The ICT test is mainly a static test—meaning it is conducted without power applied to the board. It can quickly identify the causes of component circuit abnormalities, such as poor soldering or incorrect component placement, and provide clear indications of test anomalies, facilitating subsequent repair work.
2. Understand FCT testing
FCT testing is an online functional test primarily used to evaluate the electronic and electrical functionalities of a PCBA board. FCT testing is a dynamic test, meaning it must be conducted while the board is powered on. The testing principle involves simulating the PCBA board’s actual operating conditions by applying input signals or power supplies to the unit under test, thereby verifying whether the data parameters of the tested PCBA unit during operation are within normal ranges. The tests mainly cover functional parameters such as voltage, current, and power.
3. Understand the differences between the two.
Having gained the above understanding, I believe everyone now has a clearer grasp of the two testing methods. The specific differences between them are summarized as follows:
a. FCT testing is a dynamic test whose primary purpose is to verify the functional performance of the entire PCBA board; whereas ICT testing is a static test whose primary purpose is to check the circuit functionality of various components on the PCBA board.
b. Their different functions affect the test sequence: First, perform the ICT test; after passing the ICT test, you can proceed with the FCT test.
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Chongqing Gardray Technology Co., Ltd. is a company specializing in the design and manufacture of various PCBA board test fixtures, as well as the R&D and production of FCT testing equipment.
Address: Building 15B, Qingfeng International Enterprise Port, Liandong U Valley, Shapingba District, Chongqing City
