In this video number {1071A} Why Zener not installed?, SMPS secondary side, explained, Q&A, Why Zener not installed? SMPS secondary side explained. in last video number {1071} SMPS low output, fluctuating, Tik tik sound. https://youtu.be/P4D3-ORGacQ i repaired 12 volt 10 ampere power supply. while repairing i detected 1N4744A zener diode short circuited. i removed this zener diode and replaced PC817, and a bluged capacitor.
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00:00 smps secondary side explained
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06:52 smps secondary side circuit diagram explained