in this video i explained how does computer atx 200 Watt PSU SMPS switch mode power supply works. i explained diagram step by step so it will very helpful in smps troubleshooting and easy repair. because the repair man must know how does the circuit works. computer ATX power supply have input EMI filter, MOVs, NTC, dual line inductor filter bridge rectifier and capacitor to charge at specific dc level, after that there is standby power supply which generates , VCC for PWM controller. PG power Good signal is generated after voltage level verification by level comparator. PWM controller receives power ON command from CPU and starts switching, which drives the Inverter section BJTs, MOSFETs, IGBTs, and we receive +12 Volt, - 12 Volt, +5 Volt -ve 5 volt 3.3 volt which is further purified by stabilization circuit. feed back circuit is used to regulate the output voltage, if SMPS makes fluctuations, or any voltage is over voltage or SMPS short circuit the OVER voltage protection circuit controls the output control pin of PWM controller, so that the output will off this video is useful for how to repair SMPS how to repair AT ATX power supply fan turns on and then goes OFF PSU have no output how to repair computer power supply how does atx power supply works how to troubleshoot #computer #AT #ATX #SMPS #PSU #switch #mode #power #supply SUBSCRIBE, LIKE SHARE Thank You #haseebelect Youtube https://www.youtube.com/channel/UCamuZ8n1PwdZpzxV32b1l_w facebook https://web.facebook.com/haseebelect/ Twitter https://twitter.com/haseebelect
