{772} How To Repair SMPS Step By Step

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

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

[ivanviduljevic]

The best way to learn from this video is to get just pen, print out data sheet and take all notes and go along, pause rewind until you get it on the paper, take all notes, pause rewind again! And conforme that you know what every resistor or diode does in circuit and then you move to live PCB! When i start electronics i didn't quite understand what is "start up circuit for IC" and that cause me a lot of trouble. But Haseeb makes this grate videos explaining every step, so consider yourself lucky to have this kind of knowledge just served out! Thanks Haseeb.

[trone]

You are the Guru when it comes to SMPS repair. I don’t think anyone comes close to your knowledge on YT

[WRMD]

Great video! So there's now NO need to ask you 10 times how to fix my tv! You've covered this subject better than anybody. If I can't figure SMPS's by now, I probably shouldn't be taking anything apart. Thank you for taking the time to take what once was a completely foreign circuit to me and making it understandable! Best regards!

[akierum]

Best video on smps troubleshooting i've ever seen

[abdulzaheed]

Wa aleikum salam varhmathulla...jazzk allaha kairan...good explanation bro

[NorthElectronFix]

No university teach like this man .thanks

[mohamedniyaz]

Haseeb you are the best i have come across in circuitry explanation

Keep up your excellent work

[nirmanmulalic]

May Allah almighty bless you and and give you all the best in dunya as well as in ahirah for your helping people to understand these complex concepts of electronics, esselamu alaikum wa rahmetullahi wa berekatuhu.

[Jandersonmanhez]

Perfect explanation. I have learned so much with you. thanks so much.

[osamakosara]

Masha Allah great video to learn may Allah protect you!

[Dale-ihuq]

I will never leave this channel , thx

[QARepair]

Very interesting 👍 and your English are very good

[susantaatha]

We are also following yous foot steps. Many many thanks for your motivation information.

[okboybye]

Very good explanation in depth of each components and complete operation. How we get output and why we do not get output if any problem in parts! Thank you for giving scientific level of knowledge.🙏🙏 Loves from IND.

[MarkPrince]

Very good and very informative
Thank you very much for sharing
Best regards from Philippines 🇵🇭

[isahizhenfahm]

Thank you sir for your video lessons on SMPS your video series taught me everything I know about SMPS. Jazhakhum llah khairan.

[francismannion]

Thank you sir for an excellent video. Every time I watch your lessons I learn something new.

[HarlavanisPanagiotis]

Excellent video dear friend, have a happy Thursday ☺️

[kalross]

Love your videos! Thank you so much for sharing the knowledge.

[gauripartapshanker]

Thank u so much. Your all vedeos are informative and knowledgeable. Thank you so much.