{772} How To Repair SMPS Step By Step

Video Description

in this video number {772} i explained and demonstrated How To Repair SMPS Step By Step. How To Repair SMPS || SMPS Repair Step By Step || Switch Mode Power Supply . it is UC1842, UC2842, UC3842, UC1843, UC2843, UC3843, UC1844, UC2844, UC3844, UC1845, UC2845, UC3845, based current mode controller switch mode power supply circuit. these ics are most commonly used in battery charger, power supply circuits, laptop charger adapters and tv power supplies. i demonstrated how to troubleshoot using multimeter and oscilloscope. because a smps circuit is electronic components based power converter, which takes line voltage, then converts it into dc voltage. afterwards these DC voltage are chopped in high frequency based pulse width modulation PWM based IC and the power mosfet, which are passed through a power transformer, after transformer, it will rectified into dc voltage. a feedback circuit is incorporated to maintain the voltage regulation. some circuits have a current limiting / current regulation circuit. #howto #repair #smps Download UC3842 SMPS circuit diagram http://bit.ly/3V6gYNk https://bit.ly/3uc8wB0 https://bit.ly/3a3KukQ https://bit.ly/3NwZqFA BOM https://bit.ly/3OiSTjJ i shared very easy & step by step practical troubleshooting, circuit tracing and fault finding techniques to find the faults in any switching mode power supply. i explained basics of smps working and understanding repair smps. how to repair smps (switch /switching mode power supply) either it is industrial power supply, laptop charger, adapter, computer atx power supply, server power supply, mobile charger, battery charger, inverter ac board, inverter of solar system, inverter welding machine, led / lcd tv power supply, UPS uninterruptible power supply, washing machine control board, sewing machine circuit board, power supply of dth / digital satellite receiver, switching mode regulator, step by step repair & practical troubleshooting & circuit tracing tutorial using smps circuit diagram & block diagram. how to test smps switching frequency, what is PWM pulse width modulator, how to test pwm signal. what is optocoupler or opto-isolator and its function in feedback circuit. how to repair / fix switch mode power supply / supplies. basic working of SMPS, basic working concept of SMPS switch / switching mode power supply, how switching mode power supply works, most common faults in SMPS. smps output voltage fluctuation, SMPS is fluctuating output or output voltage unregulated , switch mode power supply have no output. smps input short circuit, fuse keeps blowing, smps startup circuit, smps switching frequency testing, rcd snubber circuit, secondary side, feedback circuit, TL431 adjustable reference, optocoupler, auxiliary voltage, vcc or bias voltage, current sense circuit, output fluctuation, voltage regulation. fuse keeps blowing. smps short circuit in output, SMPS dead or no output voltage or have low output voltage. smps ic have no switching frequency, smps no output voltage, how to troubleshoot PWM SMPS controller when there is no switching from MOSFET 00:00 How to repair UC384x KA384x SMPS controller based Power SUpply CIrcuit step by step 01:42 how to download circuit diagram of any SMPS power supply circuit 02:45 3842 smps circuit explained and how to trace the circuit 03:41 Inrush current protection NTC circuit 05:42 fuse keeps blowing in smps, input short circuit 08:07 how to perform cold testing for power supply circuit 08:16 how to find short circuit in smps input circuit 09:36 How to Test NTC negative Temperature Coefficient resistor 13:58 UC384x Startup circuit explained 15:04 How to Test SMPS Controller IC 15:43 how to test MOSFET gate drive signal using multimeter and oscilloscope 21:06 how to check capacitor charging discharging 25:46 How to Measure switching frequency of uc 384x PWM ic 33:13 SMPS output have very low output voltage