Introduction to ICT Testing Principles

ICT (In Circuit Test) is an electronic testing technology used to detect and diagnose components and circuit connections on printed circuit boards (PCBs). ICT testing helps ensure the quality and reliability of products, especially in large-scale production processes. The following will provide a detailed introduction to the principles, methods, and applications of ICT testing.

What is ICT testing?

ICT testing is a testing method that uses various electrical methods to detect the components and connection status on a circuit board by directly touching the test points on the PCB with probes. It can detect welding defects, component parameter deviations, short circuits, open circuits, and other issues.

Test points and probes

During PCB design, test points should be left at critical locations, and signal transmission can be achieved by contacting these test points with probes on ICT testing equipment. The layout of probes is closely related to PCB design, and reserving reasonable testing points is a prerequisite for ensuring testing accuracy.

Test principle explanation

The principle of guarding.The biggest feature of In Circuit Test is the use of Guarding techniques, which can isolate the tested parts without being affected by other parts on the circuit.

The measurement method of resistance Constant current measurement method, constant voltage measurement method, phase measurement method.

Capacitance testing, inductance testing, diode testing, short/open circuit testing, polarity testing of capacitors, etc.

The Application and Future of ICT Testing. ICT testing is widely used in fields such as consumer electronics, communication devices, automotive electronics, and medical equipment. In the future, with the gradual miniaturization and integration of electronic products, ICT testing technology is also constantly developing towards higher accuracy, stronger applicability, and more intelligence.