Product manufacturers look for nothing less than perfect when it comes to the printed circuit boards used in their products. So far you have seen a few basic things about ICT including the definition, defect coverage and elements in a tester. ICT, which is a reliable, high-quality, high-volume testing, ensures that the circuit has been manufactured correctly to perform to the highest standard in applications. Whatever type you choose, there are some components common to all ICT testers, they are as follow: It is important that the PCB manufacturer should employee the right tester to access required points on the circuitry. There are several types of in-circuit test systems available on the market and each differs with respect to the other in terms of performance, capability and testing procedures. However, ICT fails to detect multi power connections missing, redundant power connections decoupling capacitors missing, mechanical fixings, and overall look of the board among others. Presence/absence of active analog components.Jumpers/switches in correct location/setting or not.Open circuits (“opens”) where electrical continuity should exist.Shorts between traces and/or component leads.Component spacing, lead spacing, land sizes, and component sizes.The method tests the following in a printed circuit board. Compared to other ways of testing, ICT tests each component on a board, one at a time. What accounts for the immense popularity of ICT? Its comprehensive test coverage is the prime reason. What defects are identified in In-Circuit Testing As the name implies, in Power-off Tests, tests are conducted before power is applied and in the second part, tests are performed after power is applied. ICT is usually conducted in two parts such as Power-off Tests and Power-on Tests. The ICT, which is a fully automated test, thus helps detect defects in an assembly, which can be replaced accordingly before making it final. ICT is a highly accurate form of testing that performs a “schematic verification”. In-Circuit Testing, ICT is a powerful tool, which helps detect defective components by checking them individually. Would you like to know more about this cost-effective testing method that delivers component-level fault diagnosis? Then here you go. So, how would you test individual components on the board and its electronic characteristics for any imperfection? Here is where the significance of In-Circuit testing (ICT) lies in. Each component in such an assembly is ought to perform to the highest standard as even a minor defect can affect the overall quality and performance. Printed Circuit Boards are considered as a complex assembly with hundreds of components and thousands of solder connections.
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