Below is a of the classic Blue Ring Tester. Components are arranged for clarity.
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Low Q-factor. Could be a partial short or a low-quality inductor. 6+ LEDs (Blue): High Q-factor. The component is healthy. Why This Schematic is "Exclusive" Below is a of the classic Blue Ring Tester
This article is for educational purposes. Always observe safety procedures when working with high-voltage circuits. Flyback transformers and SMPS primaries can store lethal charges even when unplugged. blue ring tester schematic diagram exclusive