How to Test LEDs on PCBAs

+ In-Circuit Tester

Streamlining LED testing with an integrated test system

Testing light-emitting diodes (LEDs) on printed circuit board assemblies (PCBAs) during the in-circuit test stage requires integrating LED analyzers into the test system. The integrated testing approach helps manufacturers measure the LEDs' optical and electrical characteristics, such as the luminous intensity, temperature, and other key parameters. Manufacturers can identify LED defects early, enabling prompt corrections and minimizing production delays.

Integrating LED testing into an integrated circuit tester (ICT) requires significant engineering efforts. This method involves incorporating custom fixtures, test processes, and dedicated storage. A specialized fixture is essential to securely position the proper LEDs and ensure precise alignment of the analyzers’ optical heads. Test engineers will need a test sequencer to execute automated tests and analysis based on the specific type of boards or LEDs tested.

Integrated manufacturing LED test solution

Enhancing production line efficiency for LED testing requires integrating an LED analyzer with in-circuit testers. However, integrating these third-party devices often requires complex, time-consuming efforts. The Keysight i3070 Series 7i offers a standardized method for integrating the LED analyzer into the tester. Equipped with the OpenTap LED test plugin and various LED test licenses, the i3070 Series 7i streamlines the LED testing process, enabling rapid and expert-free test creation and execution. Test engineers can seamlessly incorporate these results into the tester’s main interface for comprehensive and efficient circuit board testing.

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