What is the first step in the procedure for electrical troubleshooting?

The first step in the procedure for electrical troubleshooting is to measure Vout. This step is crucial because measuring the output voltage can provide immediate insights into whether the circuit or device is functioning correctly. If the output voltage is as expected, it indicates that the upstream components may be operating properly. Conversely, if the output voltage is incorrect, it can help narrow down where the issue might lie in the circuit, guiding further troubleshooting steps.

This initial measurement serves as a reference point, allowing you to identify if there are problems related to the power supply, downstream components, or signal integrity. It sets the stage for subsequent steps, such as checking inputs or observing indicators like LEDs, which can provide additional diagnostic information based on the output measurement results.