In-Circuit Test (ICT) test is a commonly used electrical test method to verify the correctness of the circuit connections on the PCBA and whether the electrical performance meets the requirements.ICT test is usually carried out in the final stage of PCBA manufacturing to ensure the quality and reliability of the PCBA.
1、Prepare test fixtures: According to the design and layout of PCBA, make corresponding test fixtures for fixing and contacting PCBA.
2、Connecting test instruments: Connect the test fixture to ICT test equipment, including test probes, test instruments and power supply.
3、Test Point Definition: According to the design and layout of PCBA, define the circuit connection points to be tested, including voltage, current, signal, etc.
4、Conducting tests: Place the PCBA on the test fixture, contact the test points through the test probes, and conduct electrical tests, including resistance, capacitance, inductance, short circuit, open circuit, etc.
5、Analyse test results: According to the feedback and test data from the test instrument, analyse whether the electrical performance of the PCBA meets the requirements.
6、Record and store: Record test results and data for subsequent analysis and traceability.
Through the PCBA ICT test, problems in the PCBA manufacturing process can be found and corrected in a timely manner to ensure that the circuit connection is correct and the electrical performance meets the requirements. This is very important for the electronics manufacturing industry to improve the quality and reliability of PCBA and reduce defects and errors in production.