In this episode #0018 of Electronic Components Testing, we reveal how to test an optocoupler (optoisolator) using a digital multimeter step by step. Optocouplers use an LED to transmit signals across an isolation barrier (often just an air gap). Optocoupler dielectrics are built in an assembly house, not in the controlled environment of a controlled process manufacturing facility. Before diving into diagnosing and repairing a 6N137SDM, it's essential to understand its functionality, common issues, and the basic tools. Optocouplers, also known as optoisolators, are essential components in modern electronics, providing crucial electrical isolation between circuits. I connected an oscilloscope to the LED of the optocoupler, the signal is fed to the LED linear, and from the output of the optocoupler on the photodiode, I get a signal that.
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