In this video I analyze the schematic of a flyback switching power supply and explain how does it work. This one is a 5V 10A 50W SMPS with a bipolar transistor, not a MOSFET, and no control chip. I also show some waveforms on my oscilloscope.
How I repaired this power supply:
https://youtu.be/VGM-VBN_7Zo
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