CURSO GRATIS: El truco para probar Diodos SIN DESOLDAR de la placa

How to measure diodes on a circuit board with a multimeter: this technique is especially useful in electronic repairs, as it allows for quick checks without disassembling the board or risking damage to traces, lifting components, or complicating the diagnosis. How to tell if a rectifier diode is bad or good: In a fault, the problem could be a shorted or damaged diode. The drawback is that if we measure it outside the circuit, we waste time desoldering. And if we measure it inside the circuit without a proper method, the measurements can be confusing due to other components connected in parallel. To determine if a rectifier diode is damaged, I use a multimeter with alligator clips to ensure a stable and accurate connection. The clips are placed at a strategic point in the circuit, in this case, on a capacitor near the diode we want to test. Choosing the capacitor as a reference allows us to observe the circuit's behavior more clearly, since the charging and discharging effect helps us correctly interpret the test. To determine if a rectifier diode is conducting, I use a homemade continuity tester based on an LED. This simple tester allows me to quickly and easily visualize the current flow. When I test in one direction, the diode doesn't conduct and the capacitor doesn't charge, indicating that the circuit doesn't allow current to flow in that direction. However, when I reverse the polarity of the measurement, the diode conducts correctly and the capacitor begins to charge. This behavior confirms that the diode is functioning properly while mounted on the board. This procedure is very useful for detecting shorted diodes, open diodes, or faults in power supply stages without having to remove them from the board. It allows for faster work, reduces risks, and maintains the integrity of the original circuit. It's a practical technique that can be applied to televisions as well as other electronic boards where efficient diagnostics are needed. If you work in electronics repair, this method can save you time and improve the accuracy of your tests. In the video you will see the step-by-step process and how to correctly interpret the results to determine if the diode is in good condition.