in this video number {749} SMPS Is Not Working || SMPS Not Turning ON. i explained how to troubleshoot, test and repair KA7500/TL494 based switch mode power supply. this smps controller drives the half bridge topology using D130077 NPN power transistors. i found the power transistors and related components damaged, i replaced it and it started working
You are Invited to Join Haseeb Electronics
   / @haseebelectronics  

#howtorepair #smps #tl494
SMPS Is Not Working, smps not turning on, smps is not working how will you check, how to know if smps is not working, how to check smps is working or not, smps, how to repair smps, how to repair switch mode power supply, haseeb electronics, switching mode power supply tutorial, switching mode regulator, how to repair switching mode power supply, smps tutorial, switching mode power supply, how to repair switch mode power supplies, how smps work, very easy repair of smps, how switching mode power supply works, power supply, switch mode power supply, smps repair, switching power supply repair, smps repair step by step, smps no output voltage, basic working of switching mode power supply
00:00 Introduction
00:35 How to apply power an electronic circuit
01:04 how to measure ac voltage using multimeter
01:25 how to disassemble power supply
02:12 how to test / check fuse using multimeter
02:35 how to test KA7500 / TL494 pwm controller ic in circuit
02:50 How to repair smps step by step
03:25 how to test switching of smps controller ic
03:56 KA7500 TL494 is not starting up