{773} Split AC Indoor Unit Board Not Powering On

[@Rathu]

Sir I noticed U r applying Solder before de Soldering on the same point... pls Say What is the need of applying Solder before desoldering

[@HaseebElectronics]

yes you are right. before desoldering, we must re-touch solder by applying some fresh solder. it is better for thermal conductivity and it prevents the pcb from overheating during desoldering process. more over it removes the dust rust and oxides from the old solder, so it doesn't allow the dust to stuck in old and contaminated old solder inside the desoldering tool nozzle . otherwise the old solders chokes the desoldering tool's nozzle

[@tahirahmad4682]

I have experienced that old soldering takes too much time to melt and damage the surrounding area. and when applied new soldering first, it took less time.

[@HaseebElectronics]

yes you are right brother

[@1beejay1]

Thank you, Mr. Hasseb, for sharing that informative teaching video. Once again, you're aways putting safety in your videos first, and I really appreciate it. It can be so easy to forget to tape up those wiring from touching while you're power up a circuit board! Very important details technicians should never overlook.

[@joselicop872]

Very useful teachings. I always enjoy watching your contents here sir. A lot of us technicians will benefit from what you are sharing. We often times encounter problems in Inverter Air conditioners. Hope to have more contents about Inverter AC issues and errors. Much love from Philippines.

[@stoqntodorov3198]

Thanks for the information, I wish you good health from Bulgaria

[@wajidyoutuber4555]

Bohat he achi aur malomati video Big like Thanks for share us

[@HaseebElectronics]

thanks a lot dear brother

[@jamesnjuguna-hb9zx]

I love and follow your step by step explanation as you are very clear

[@W1RMD]

Thanks for your advice, thoughts and prayers. My eye is much better! Great video also!

[@kmhovlog6185]

Like very exciting great content interesting informative video adorable work best wishes

[@HaseebElectronics]

best regards and special thanks

[@muhammadishtiaq24]

Excellent thanks for sharing this informative video

[@HaseebElectronics]

best regards and special thanks

[@manISnoGOD]

Slm brother great information

[@HaseebElectronics]

best regards and special thanks

[@HarlavanisPanagiotis]

Amazing job dear friend, have a happy weekend 😊

[@HaseebElectronics]

best regards

[@manISnoGOD]

What desoldering tool is that and what solder you using were you buy it

[@HaseebElectronics]

i use WELLER WR3M rework station and most of time is use solder from BOW electronics USA, CASTER, alpha brands i shop online from rs-online, amazon, farnell

[@vijayakumarkumar9190]

Very good and useful information sir thanks

[@HaseebElectronics]

it is my pleasure

[@mehdi7136]

Very useful Video thanks a lot

[@HaseebElectronics]

it is my pleasure

[@kaizen1071]

Bize bu önemli bilgiler öğret tiğiniz için Allah CC sizi dünya ve ahirette mükafat verir inşallah.

[@HaseebElectronics]

çok teşekkürler canım kardeşim

[@gauripartapshanker9197]

Informative vedeo. Thank u so much

[@HaseebElectronics]

best regards and special tahnks

[@ahmedmadkour]

Nice work my brother 😍 give you super 👍 keep safe and healthy

[@nazakathussain4871]

Good work God bless you

[@HaseebElectronics]

thanks a lot God bless you

[@yourenglishguider4421]

Thank you, for sharing information.. Jazakallahu khaire

[@fofocookingandvlog623]

Good work allha bless you 🤲🇩🇪

[@HaseebElectronics]

best regards and special thanks

[@Edmorbus]

What an excellent video

[@HaseebElectronics]

it is my pleasure

[@AbdulMomenZargar60]

Salaam Janab Bhai Saab

[@HaseebElectronics]

wa alaikum salaam Bhai Ji aap kesy hein

[@eamonhannon1103]

Which meter do you recommend to check the capacitor value for PSU ?

[@HaseebElectronics]

you can use any meter with capacitance option but for electrolytic capacitors much better tool is ESR meter

[@eamonhannon1103]

@@HaseebElectronics Thanks I understand

[@saarike]

Excellent! Thank you.

[@HaseebElectronics]

best regards

[@rohanranjandesilva465]

Very usefully vedio sir please give details you using soldier and sucker where can get

[@HaseebElectronics]

best regards it is WELLER WR3M rework station made in germany you can purchase online

[@rohanranjandesilva465]

@@HaseebElectronics thanks 🙏

[@allmobilesolution6613]

love you sir you are the best

[@HaseebElectronics]

thanks a lot dear brother

[@kualalkuolom]

Thx. Can you which part controls the ac fan speed and how?

[@charlesmawale9114]

If I heard you wrong on certain video you said if there is small voltage at the output and fluctuating then I have to check the secondary ( output side ), if there is full voltage but fluctuating then I have to check feedback section. So you checked snubber circuit because pwm IC was heating?

[@HaseebElectronics]

1. if we have few millivolts with fluctuations at output side, and high fluctuations on vcc capacitors & bulk capacitor ---- possibility secondary side have short circuit 2. output side, no voltage. vcc capacitor & bulk capacitor high fluctuations --- possibility output side open 3. output side high voltage + fluctuation, vcc capacitor & bulk capacitor fluctuation --- possibility feedback network 4. low output voltage (approx 1 volt and above) -- possibility RCD snubber, dry joints in high current components (transformer, mosfet, current sense resistance, rectifiers etc) when rcd snubber diode is short circuit, it creates a parallel path with transformer winding, thus it doesn't allow to built required magnetic field in primary, and the circuit draws more current, because in this situation there is just one capacitor (part of snubber circuit) that is parallel to the primary winding because capacitor provides very low XC at high frequency, while at the same time the transformer provides more XL

[@charlesmawale9114]

@@HaseebElectronics thank you very much, this is my notes for reference.. thank you very much

[@HaseebElectronics]

it is my pleasure these are my own troubleshooting tricks sometimes there some other things are interconnected with some fault condition but mainly these symptoms lead us to pinpoint location

[@charlesmawale9114]

@@HaseebElectronics thank you very much, at least we know where to look..

[@bhatshahid4800]

Sir inverter ac pcb repair paa video banoo plz

[@Edmorbus]

thanks for sharing

[@HaseebElectronics]

best regards and special thanks

[@manISnoGOD]

Is it possible to build a bench power supply from 1volts to 30volts I got some laptop chargers an transformers laying around all I need is the diagram

[@palwindersandhu2031]

Thanks sir for sharing, GBU...........

[@HaseebElectronics]

best regards and special thanks God bless you

[@JAMSHIDMOBILELAB]

Good job 👍🏻

[@HaseebElectronics]

best regard and special thanks

[@JAMSHIDMOBILELAB]

@@HaseebElectronics I’m very much obliged to you!

[@chotuusian4127]

Good work

[@HaseebElectronics]

Thank you so much 😀

[@sunilkarki5738]

dear haseeb sir can we use 4007 diode on the rcd snubber? this area has 100khz+ frequency and our 4007 barely works at 100hz.

[@HaseebElectronics]

1N4007 have nominal capacitance 15pF upto 1MHz, this diode have a junction capacitance of 1PF. so it can be used at 100KHz. and it is most commonly used in smps snubbers. FR107 is also sued in same place.

[@sunilkarki5738]

@@HaseebElectronics dear sir can we use 1n4148 switching diode as a replacement as FR107 is also a fast recovery diode?

[@HaseebElectronics]

no 1n4148 is signal diode. it couples the signal. it cannot provide enough current

[@alchemy1981]

Hello freind, is the diagram you sent me that of Lg compatible on this board

[@HaseebElectronics]

yes brother that board W2241 is for LG FLATRON W1942S model

[@alchemy1981]

@@HaseebElectronics yes I know it's for lg but is this lg diagram compatible for other brands like samsung and phillips and other brands

[@HaseebElectronics]

yes brother if the board model number is same, same service manual can be used for that one, either it is samsung, philips or any other brand. as these boards are universal. different assemblers purchase boards from different companies and they produce their product

[@philipscharles1333]

once again a good video sir , sir i have a question sir what was the symptom when snubber capacitor leaky for example if 10nf to 5nf

[@faresshaker7765]

Djazak Allah khayran , for the title the correct word is "ne s'allume plus" , for the atx power supply if the stand by voltage is present but the power supply doesn't start up I checked the only Ic in the board vcc and vref are present can we say that the Ic is faulty

[@electroskills]

Best dear

[@HaseebElectronics]

thanks a lot bhai

[@alchemy1981]

is there a universal diagram for the switching power supply for TV and receiver and others just to understand and troubleshoot our power supply thank you friend

[@thejeshwarapatil.g.r7861]

What is the purpose of 1Mohm resistor after VA in smps unit

[@PCB_UNCLE_REPAIR_CENTER]

Assalamualaikum bhaiya.... Bhaiya I'm very confused in positive , negative and ground what is defference amoung it.....I've been failed to find answer of whole KZbin..... Bhaiya if you read this comment plz plz Clear all this doubt..... Like what is defference..... +12, -12, and what is ground.....??? Q¹....What potential deference will be between +12 and ground , -12 and ground, +12 and -12......? Plz plz plz plz make a long videos with deep detail. ....🙏🙏🙏🙏🙏 ... . . . .. God bless u

[@voitano73]

Checking shorted semiconductors should be done first. And 1N400x diode is slow rectifier, around switching IC you should use fast diodes , like BA159 or 1UF4007 (probably used original )

[@mandasrinivasmurthy95]

Hai how get circuit diagram from pls let me sirji

[@prkacro]

swapping phase and zero doesn't bother the board? this with a nail snack is cool..

[@HaseebElectronics]

no. when we are using two lines for troubleshooting purpose, then there is no difference between line and neutral.

[@prkacro]

@@HaseebElectronics I understand, thank you

[@eesubsk4205]

Assalamualaikum warrahmtullahi wabarakatuhu. Please post Neckband (Blutooth Ear phones ) and Ear Buds repair.

[@susantaatha6468]

Nice

[@HaseebElectronics]

best regards

[@nayanjagirdar8408]

👌👌👌👍

[@HaseebElectronics]

best regards

[@tinochoolun4397]

yeeeeeeeeees thumb up sir

[@dandapanipathak5616]

Sir plz don’t try to edit the video, post as it is because we can learn more about working skill

[@HaseebElectronics]

you are right but viewers ask to make short videos

[@prkacro]

@@HaseebElectronics respected, the video should be long in order to understand it as easily as possible.. thank you

[@HaseebElectronics]

sure I will try my best to dig more deeper 💕 it will my pleasure

[@erkanmaller9695]

👍

[@HaseebElectronics]

best regards and special thanks

[@SAIDImts]

Eruor EA

[@HANENSMEDIALAB]

❤hello my friend / your content is well enough to inspire and guide others (the best way ; to appreciate is to visit) like 🥀279

[@HaseebElectronics]

thanks for watching

[@craftymulligar]

How can you work with that dog barking. You do good work but dog is annoying in background.

[@tvbox8478]

👍

[@HaseebElectronics]

best regards and special thanks