{1071A} Why Zener not installed? SMPS secondary side, explained

In this video number {1071A} Why Zener not installed?, SMPS secondary side, explained, Q&A, Why Zener not installed? SMPS secondary side explained. in last video number {1071} SMPS low output, fluctuating, Tik tik sound. • {1071} SMPS low output... i repaired 12 volt 10 ampere power supply. while repairing i detected 1N4744A zener diode short circuited. i removed this zener diode and replaced PC817, and a bluged capacitor.
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00:00 smps secondary side explained
00:28 Q&A questions and answers
05:06 weller WR3M rework station
06:52 smps secondary side circuit diagram explained

[@farukrabbishoud1138]

Assalamualikum wa rahmatullahi wa barakatuhu. I appreciate all your activities. Every video contains a lot of info and we are learning a lot. We are benefiting a lot. So don't look them who are doing negative.

[@HaseebElectronics]

wa alaikum salaam dear brother it is was just discussion. when someone finds some flaw in the video, he must indicate the mistake and errors and dislike the video so the youtube will not recommend to other video otherwise i always welcome positive critisim

[@farukrabbishoud1138]

@@HaseebElectronics ❤️❤️❤️

[@xhonatankurti8515]

Assalamu Aleikum, bro, i ask you what a potentiometer is ?

[@pu8reLib]

@@xhonatankurti8515 in simple. I say. variable, or volume type resistor

[@xhonatankurti8515]

@@pu8reLib Thanks 😊

[@jaraalbert]

Thank you for sharing all your knowledge with us and I appreciate all your videos I am always learning something new Thank you very much my friend for making these videos for us

[@HaseebElectronics]

You are so welcome

[@user-li4bp4zb9j]

From Philippines i salute you best toturial in electronic repair

[@firdaus2581]

I like how this repair description works and why the components are changed

[@AltayOspan]

Thank you for your video, we watch and study it all the time; I’m from Kazakhstan and read it through subtitles. Thank you!

[@HaseebElectronics]

You are welcome! and it is my pleasure

[@moneraloush2750]

One of my interests during the holy month of Ramadan was watching videos that explain direct current circuits, especially your videos. Thank you for this knowledge that I understood from you, and God willing, I will continue with your valuable videos. Special thanks to you.

[@lars-erikandersson824]

Swedish: Jag tycker att du informerar bra. De flesta funktioner förklaras. Bra gjort!

[@electroFizou]

Really I appreciate all your videos .all of them are instructive .Ramadam karim to you as well as to your viewers ( muslims) ofcourse .and my greeting to non muslims as well .follower from Morrocco

[@HaseebElectronics]

السلام عليكم و رحمة الله و بركاته رمضان مبارك عليكم و علينا و جميع المسلمين الله يسلمك و يسعدك

[@khudaydus]

Your are one the best reference to me.I liked your topics.You are my Great Teacher. ❤Saudi Arabia

[@HaseebElectronics]

it is my pleasure please accept my humble thanks

[@thiruchelvamselvaratnam2252]

Thanks Haseeb. Many of us, interested in electronics, are really thankful to you. Continue your great job. Just ignore bad comments.

[@franzgreifenhagen3004]

Hallo Mr. Haseeb. Ich freue mich über jedes neue video von ihnen.sehr gut gemacht und vor allen Dingen sehr gut erklärt. Auch für solche Leute wie mich, ich war zwar autoelektriker,aber zu meiner Zeit gab es noch nicht so viel elektroniik,und ich stelle jetzt fest ich habe den ferkehrten Beruf gelernt,weil für mich die elektronik dasinteresannteste ist.Schade nur Das es mit vortgeschrittenem immer schwieriger wird alles so schnell zu verstehen.Aber solange ich es noch kann freue ich mich über jedes neue Video von Ihnen,weiter so. Ich schaue jeden Beitrag von Ihnen,lebe hier in Greece und bin 71 Jahre alt Deutscher,vielen Dank und weiter so F.G. ALEX,,POLIS GREECE.

[@HaseebElectronics]

Guten Tag, Herr Es ist mir eine Freude, dass meine Bemühungen meinen Zuschauern zugute kommen. Ich bin dankbar, dass Sie Ihre wertvollen Worte geschrieben haben. Sie haben Recht, die Elektronik hält mittlerweile Einzug in alle Bereiche unseres Lebens. und das Erlernen der Elektronik ist ein guter Ansatz, um sich mit der Elektronik der Zukunft auseinanderzusetzen Bleib gesegnet

[@miroslavstevic2036]

Good job Haseeb. Always explain and draw when you fix, sometimes you fix without clear explanation for beginners. Have a nice day!

[@W1RMD]

Great job explaining everything and being so open to comments. I always apprerciate your videos.

[@clems6989]

Your videos are very well done. I enjoy them very much and have learned a lot from you. Thank You !

[@HaseebElectronics]

You are very welcome

[@carolinediyandvlog]

Big like nice 😊 video good information 😊 have a great day 😊

[@HaseebElectronics]

best regards and special thanks

[@alimohammadi8164]

Thank you, dear professor, I hope you will always be healthy

[@jayathnandana7955]

whilst wishing you a happy Ramadhan as a continuous viver of your valued video from sri lanka your service is highly appreciated I learn more and more thing from you go ahead god bless

[@secod2022]

Your videos is the best on youtube

[@HaseebElectronics]

thanks a lot

[@mahmoodh7767]

Thanks mr Haseeb for sharing your knowledge 👌👌👍👍🙏🙏🌹🌹🌹

[@HaseebElectronics]

It's my pleasure

[@muhammadishtiaq24]

Weldon keep sharing

[@ukabalwadi]

جزاك الله عنا خيرا وجعله في ميزان حسناتك اخي الكريم

[@ammadkhan8442]

Sir awesome 👍👍👍👍👍👍

[@saarike]

Excellent analysis and information!!! My humble thanks. 👍👌👍

[@user-ck6nw7cn7h]

Selamünaleyküm çok açıklayıcı bilgiler verdiniz. ALLAH razı olsun kardeşim.

[@HaseebElectronics]

ve aleyküm selam. değerli sözleriniz için teşekkürler. Allah korusun

[@gregwmanning]

Thanks for this explanation video. I learnt lots more with this through explanation than I did with your original excellent video. If you can spare the time in future repair videos please explain in this detail you thought/repair process. Thanks again Greg

[@pu8reLib]

AOA Mr.HASEEB, many fools are living in the world just to eat and criticise, please don't consider them serious, I must say your work is fantastic and admirable

[@HaseebElectronics]

Wa alaikum salaam brother critisism is charm in llife, if it is positive critisism, it provides positive changes and brings positive results but negative critisism destroys the system and detracks the paths i always welcome both positive and negative. if both are in constructive sense

[@gopalarao8578]

Hi brother namaskaar. Very well explained.Thank you very much. Have a great day 🙏

[@HaseebElectronics]

You're most welcome

[@antiamperak]

Krásně vysvětlena funkce bezpečnostní Zenerovy diody někdy to bývá oříšek přijít na kloub závadě, mám rád tyto videa rozhodně pokračuj ve své práci 😉 děkuji

[@HaseebElectronics]

zvláštní díky za váš cenný komentář. máte pravdu, že najít vadnou součástku začíná bolet hlava

[@VenkatesanS]

Knowledge is wealth. Being hobbyist some time when I feel its not my cup of Tea I used to skip and go. Normally I don't press unlike button. Request to continue your knowledge sharing.

[@peshakathisera9276]

A great analysis.

[@iofirm7454]

Good🎉

[@winlose3073]

It feels honestly bad if it's intentional maybe people sometimes click dislike by mistake unless they don't appreciate real informative content in that case I don't know, because the content here is very professional and precise and scientific. Ramadhan mubarak Mr. Haseeb.

[@HaseebElectronics]

thanks a lot for your vluable words critisism is charm in llife, if it is positive critisism, it provides positive changes and brings positive results but negative critisism destroys the system and detracks the paths i always welcome both positive and negative. if both are in constructive sense

[@fuppup]

Thanks for answers!🤝

[@ladbla1752]

Thank you for explanation. Good job.

[@HaseebElectronics]

You are welcome!

[@palwindersandhu2031]

Thanks very much brother for sharing .........

[@HaseebElectronics]

most welcome dear brother

[@susantaatha6468]

Excellent. Thank you sir.

[@HaseebElectronics]

Most welcome!

[@emineksioglu3986]

Teşekkürler

[@MytestDrive]

Salam, you are master of it .

[@HaseebElectronics]

thanks a lot dear

[@hichamtassi1753]

Salam Aleikum. Thanks for the explanations, it makes more sense after viewing the first video. But i believe that the zener must have a lot of stress when clamping voltage above 12v... I really appreciate your state of mind and videos.

[@mtrltoolman]

Good morning dear brother. Thanks for your time to explain this, good job sir.

[@HaseebElectronics]

it is my pleasure God Bless You

[@giorgostexnikos6976]

excellent analysis

[@HaseebElectronics]

it is my pleasure

[@phillypheeling]

Awesome video...Ramadan Mubarak

[@HaseebElectronics]

thanks a lot Ramadan Mubarak

[@aminul248]

Hello Sir , I learnt so many thing from you video, If you make some video in code that will help me to boost up my knowledge ,Ramadan mobarak

[@bellomuhammed4047]

Masha Allah, Jazakumullahu Khairan.

[@HaseebElectronics]

الحمد لله

[@asadsyria2849]

سيد حسيب نرجو ترجمة جميع الفيديوهات إلى العربية و شكرا لك

[@nazakathussain4871]

Well explained

[@phillypheeling]

Assalamu alaikum thank you for the information brother

[@HaseebElectronics]

Welcome

[@ishkhan2501]

Dear Haseeb, Happy Ramadan, Now it is very clear why the Zener diode not replaced, thank you again and much appreciated for full explanation.

[@HaseebElectronics]

Ramadan Mubarak to everyone thanks for your valuable appreciation for my efforts

[@pietropuleo2662]

Professional man. Excellent❤

[@HaseebElectronics]

thanks a lot

[@bruskqadir6208]

Dear Haseeb, you are really doing a great job teaching us electronics; personally, I have learned a lot from you, and I only hope you keep going and never listen to those who contribute nothing but also try to demotivate others who have something to offer. Please just keep going and never listen to those people.

[@nelsoncarmengomez7416]

Me agradan tus videos y algunos sino mucho muy instructivos, lo que noto ultimamente en los que miran es que quieren una explicacion personalizada de sus problemas y eso no es posible. Estoy susbscripto a unos 100 sitios y solo tu y otros 3 tienen viedos de calidad. tu lo haces en ingles y hindi , pero yo leo y escribo español pero me lasarreglo con susbastitulos de maravilla.un Abrazo grande desde Argentina.

[@HaseebElectronics]

bienvenido y especial agradecimiento por sus valiosas palabras. Comparto mis videos en inglés y urdu. Cuando traduzco en línea, a veces el traductor en línea traduce con significados diferentes. pero leer los subtítulos puede dar un significado más cercano al contenido.

[@nisarshaikh446]

Shukriya bhaijaan

[@jalal76]

Great job....thanks 👍

[@HaseebElectronics]

it is my pleasure

[@can-I-fix-it]

well explained, very detailed, thanks,,

[@HaseebElectronics]

thanks a lot

[@gamiwv]

EXCELLENT ANALYSIS . Crowbar protection diodes is a real headache when I had to repair SMPS (5v 10A). Another problem I had found is their "long time stability". I mean that after some years of 24/365 operation their "reference voltage" (5.1V in my case) has "drift" to a lower voltage and when reached 4.85V the SMPS start fluctuate (almost catastrophic failure for industrial computer/controller due to continuous "reboot")

[@HaseebElectronics]

thanks for your valuable comment you are right, after passage of time, the resistor values get devalued. which cause drift in center value. sometimes the "volatge reference" is also suspected

[@dimitrismaster]

thats why in industrial or other sensitive environments such as hospital equipment there has to be maintenance or replacement of modules that are known to wear out as time passes.Almost always the service manual or the manufacturer has guidelines as to what to do and how often.ofc im talking about very expensive machines,not cheap everyday consumer electronics.

[@gamiwv]

@@dimitrismaster When you are the designer of the board/circuit as in my case ?

[@dimitrismaster]

@gamiwv then you know when to do maintenance,and replacements.

[@gamiwv]

@@dimitrismaster Yes in controlled environment. On the field (in Greece we are reaching 42 C degrees in the field and bare external metal case under the sun more than 57 C ) NO

[@Solder_it]

Even if i was busy and i cannot watch your new video i will give like! And come back to watch later. Why? Because i know that the content must be good,and i know that you teach ppl and teaching ppl is a very good profession and must be appreciated so thank you. Regarding this video i didn’t understand one thing, when u say the zener is installed for safety what it will do to provide safety and safety from what?? And why it’s rated at 15V, why they didnt use a 18 or 19 V instead? Much appreciated.

[@hubertngnomo8936]

Good vidéo sur encouragements

[@pravinpadhiyar2]

Very nice sir

[@HaseebElectronics]

Thanks and welcome

[@HELLO-lw8rx]

تحية طيبة استاذ محمد اشرف رمضان مبارك

[@amadoucobar4437]

thank you

[@HaseebElectronics]

You're welcome

[@dimitrismaster]

I always like any video if the creator has provided genuine effort to explain something,to teach something or to do sth at the best of his abilities.If i see something that is wrong practice or procedure,i always write it down in the comments.Are you from Pakistan sir?

[@HaseebElectronics]

thanks a lot for your valuable words yes i am from Pakistan

[@nuritepegoz6042]

SELAMÜN ALEYKÜM sn: USTAM ÖNCE RAMAZANINIZ MÜBAREK OLSUN -SİZİ SORGULAYAN TAMİRCİNİN ANLADIĞIM KADAR AMATÖRDENDE AMATÖR O DİYOTUN NE İŞE YARADIĞINI İŞTEN ANLAYAN USTALAR BİLİYOR SİZ KENDİNİZE SIKINTI YAPMAYINIZ SİZİ SEVİYOR VE SAĞLIKLI ÖMÜRLER DİLERİM

[@HaseebElectronics]

ve aleyküm selam. Herkesin Ramazan ayı mübarek olsun. değerli sözleriniz için teşekkürler

[@ahmedkhamrich7297]

شكرا جزيلا على هاته التوضيحات المهمة و القيمة و هذا ما عهدناه في كل فيديوهاتك.اتمنى لك التوفيق.لدي سؤال:في شاحن لابتوب الزينر المتصل بالvcc l لic 3843 يضرب في كل مرة اوصل الشاحن بالكهرباء ترى ما هو السبب،ارجو من حضرتك توضيحا لهذا بطريقتك المميزة و شكرا لك.

[@tvbox8478]

👍👌

[@bitrex1029]

Like mi querido amigo saludos desde Latinoamérica

[@HaseebElectronics]

muchas gracias por su valioso apoyo. atentamente

[@g.gopalanng1925]

Super detailing video... thanks

[@HaseebElectronics]

You are welcome

[@jcsudeshchannel8224]

Happy ramzaan holy month thanks

[@HaseebElectronics]

Happy Ramadan dear brother

[@AhmedIbrahim-yl8rl]

Good ❤

[@HaseebElectronics]

most welcome

[@marrisna]

Nice video. Sir can you please explain why computer power supply makes buzzing noise?

[@Swenser]

Sir. Cannot dislike you or your videos. You are a good man . Please advocate for the freedom of Julian Assange. A man that highlighted atrocities by US military. Set him free.

[@HaseebElectronics]

thanks a lot dear

[@uwemueller1918]

Danke!

[@HaseebElectronics]

thanks a lot for your valuable support.

[@uwemueller1918]

@@HaseebElectronics thank you for sharing great Videos and fundamental knowledge. Better than german University!

[@ISO07ISO]

Allah Muhammed Şerife kolaylık, ilim ve daima paylaşma gücü versin. Biz sana dua ediyoruz. Allah seni güzel paylaşımlarından dolayı cennetine kavuştursun. İnsanlığa bilgi veren hayırlı insanlara Allah güç kuvvet versin. Türkiye'den sevgiler kardeşim.

[@HaseebElectronics]

Değerli sözleriniz için sevgi ve saygılarımla. Allah korusun. Hayırlı Ramazanlar

[@wissamking992]

May God give you wellness and Ramadan Mubarak Dear Professor, I have a 2000 watt inverter, Shore type, 40 volt AC I checked all the output mosfets and found them to be fine. I replaced the KA7500 ic and changed the variable resistor. Nothing changed. I ask you to explain the output circuit and help me. Thank you very much.

[@adilzahidan5580]

Please make a video explaining those 5 and 6 pins smd regulators (near a small coil) like s10..s15..how to know the output voltage by just measuring feedback resistors..

[@omiza3416]

Sir how rc snabber is working for the rectifier diode in secondary side, usually we see this for inductors? And does this snubber causing reverse contaction for the load and other components?

[@mksahin67]

Emeğiniz için teşekkürler. Bazı videolarda Türkçe alt yazı desteği yok. Videolarınızda Türkçe alt yazı desteğini unutmazsanız sevinirim. Kolay gelsin...

[@HaseebElectronics]

bunun için özür dilerim. bazen altyazı eklemeyi unutuyorum. çünkü çoğu zaman başka işlerle meşgul oluyorum. sorun değil, kontrol edip eklemeye çalışacağım

[@user-ss9ri4gg7t]

Thanks for ur videos Mr., I HAVE QUESTION,When electrical components connected in parallel they have the same with the source voltage ,but in the case zener diode the history different, how this could be why zener diode change this rule

[@restingroysurong805]

Sir if we measure voltage across secondary or output voltage (dc) which ground is common to put black lead and to measure voltage across dc output to test any components. Please help sir

[@andreyace8768]

Greetings from Russia! In my switching power supply, when connected to the network, the Schottky diode immediately burns out (in your case, these are MBRF20100CT diodes). Replacing the pulse transformer, PWM controller, smoothing electrolytic capacitor does not give anything. The zener diode is 12 Volts when ringing in the circuit, normal. Although, the mains voltage. instead of 230 Volts, it was only 204 Volts. Please tell me the reason for the short circuit of the Schottky diode, and where (in what) to look for a malfunction??? Thank you in advance, peace and good luck to you.

[@samuelleesteelmd1931]

I agree that you live in USA and taught locally. I am not Islamic but wish you a good Ramadan!😊

[@hubertngnomo8936]

Please sir I wait vidéo on AVR

[@soroushzarein3246]

CAN WE PUT A RESISTOR IN SERIES WITH ZENER DIODE TO SOLVE THIS PROBLEM?

[@HaseebElectronics]

no it is a sfety crowbar. it must remain in same condition in case the SMPS exceeds its limits. this crowbar will protect the next circuit

[@alimohammadi8164]

ok