watch this video on YouTube in this video i discussed LCD LED TV power supply circuit diagram standby power supply section in 17PW26-4 vestel smps switch mode poer supply, it takes 400 volt and there is 321 IC and PFC circuit which provides 3.3 volt regulated and provides12 volts which are regulated to 5 volt br Theory and Practical videos for Physics, Electrical Engineering and Electronics Engineering.br If you are Interested,br LED LCD Circuit & Power Supply Circuit Description Explained in Detail - Part 1https:www.youtube.