#189

[@merakitchen4875]

First like and view while watching your video, always good information, please pin my comment bro🌹🌹

[@BhajanGyansagar]

Lk computer power supply k liye bahut accha vdo share kiya hai Aapne Bahut hi useful informative vdo Aap late hai bahut badhiya bariki seven samjhaya hai Aapne.. It's really awesome and educational

[@vloggerAbhaypathak1]

Lk Beautiful information for computer power supply repair Nice upload

[@blashfordwilkins5962]

Skull....... Most complete of all the smps tutorials on youtube. there re many who give info but none to practically help beginners in the field. thank you. I go over you videos many time to ensure i dont miss anything.

[@samuelleesteelmd1931]

I want to thank you for the fantastic explanation of the ATX power supply. It was always confusing to me because I never had it explained to me the way you did. May God bless you always. Samuel Lee Steel, MD

[@GINCHANNELcar_moto]

Awesome. Very good

[@engineerkohat]

Excellent repair and diagnostic video. Very informative.

[@MANTEPETV]

Keren gan. Bermanfaat

[@zainElect01]

ma shaa Allah best troubleshooting of atx power supply. thanks for sharing

[@owennewman2506]

Excellent Tutorial, very well presented and informative. Than you very much. Keep on doing more tutorials like this one. I am sure others will like it as I do.

[@HaseebElectronics]

best regards and special thanks sure i will continue

[@miloradgraovac74]

Postovani BRATE gledam video od pre 3 go o Atx2005 i oduseo sam tako finim objsnjehje.Puno toplih pozfrava❤

[@andredeschamps1587]

Mr Haseeb: This was an amazing demonstration of faults within ATX Power supplies. I found this very interesting and your explaination was outstanding. Thank you again for the time you invested in these wonderful videos!!!!

[@PUTRANADAOFFICIAL17]

Waalaikum salam wr wb nice sharing friend

[@foryourinformation7431]

from Philippines very informative this tutorial is very clearly explained

[@HaseebElectronics]

best regards

[@Archanas_Village_Kitchen]

33 like bhai 🙏🙏 Bahut achhi hoti aapki vido bahut hi jankari milti jai 🙏🙏👌🏻👌🏻

[@Vidya1939]

Wonderful / very useful video explained nicely TKQ v much sir

[@HaseebElectronics]

You're most welcome

[@memylastname9972]

Wonderful video, I have used your excellent tutorial to go through the many faulty power supplies I had accumulated. Thank you.

[@W1RMD]

I want to take an old ATX power supply and follow along for training. Thank you for the video and including the scope! I'm not sure if you mentioned it, but the scope should be isolated from the mains power and ground via an isolation transformer if possible or use care not to destroy the probe, scope, yourself, or all three! I'll watch this again when I get everything set up. LOVE the light bulb idea. I test every unknown device this way. I use a 1000 watt light bulb with motors with unknown large transformers. Great as always! 🙌

[@janasmeal7916]

Ma sha Allah another great sharing 👍👍👍jazak Allah khair ❤

[@SudathPiyasena]

great informational video. thanks for sharing your knowledge

[@HaseebElectronics]

it is my pleasure

[@skfn]

This is very helpful! You make things look simple , understandable and easy! Thanks.

[@TheJavaSync]

Nice tutorial brother, Thank You!! I used 2-4 'mini dc voltmeters' instead 1 multimeter, so I can monitor various voltages in the same time. Just a litle trick

[@sworgam]

excellent class sir, good

[@HaseebElectronics]

Thanks and welcome

[@Mahemedak]

Very well explained 👌

[@kmhovlog6185]

Mashallah very nice informative vedio my dearest brother thanks for sharing stay blessed and wonderful day and great job with the details & dedicationally be happy ameen.

[@Noreenvlogs]

2nd informative and useful sharing

[@CleanHeartChannal]

wonderful upload ,Great knowledge about advanced electronics, thanks for sharing 👍

[@rmjnm]

Detailed explanation. Great video. Thanks.

[@VinodSharma-bh6hj]

Really worth the effort. Highly appreciated.

[@proudlytamilan1401]

Excellent explaination, keep it rock ...Bro

[@HaseebElectronics]

best regards

[@shanzay4316]

Really a wonderful upload . Glad to see this.

[@anthonyheak3479]

Series lamp technique is good. I would also use an isolation transformer. Good video, thank you for sharing.

[@HaseebElectronics]

best regards dear yes series lamp is a very useful tool and supporting item in repair isolation transformer is best for human safety and equipment safety as well

[@Darwishkhan]

وعلیکم سلام محترم بھای عمدہ ٹپس سدا خوش رہو

[@carshefulcazman128]

Assalmaulaikum bhai nice video bro ,dont talk so fast my lect use your video for teaching us thank you bhaii😊🤩

[@HaseebElectronics]

Ok next time best regards and special thanks

[@rahulpatelgujratahmedabad3497]

Good tiching karte hai 👌👍👌👌👌👍👌

[@HaseebElectronics]

thanks a lot

[@talhabhaiunique3652]

Really amazing 😍❤️ video. I would like to appricate your efforts. Keep it up and stay in touch my sweet friend ❤️

[@maruthapillaishanthi6813]

Very good explanation thank you very much sir

[@leighstale]

Nice u got skills

[@carolinediyandvlog]

Good morning 😁 awsome 🌼

[@haashirvlogzhaseebelectron7373]

Amazing it is useful and superb job

[@k3lanka]

03 GOOD JOB ,,,,,,,,,,,,,,,,,,GREAT

[@LionGamerYT1]

very informative and useful video thanks for sharing

[@richardlopora3872]

My HP Compaq Elite 8200 SFF supply comes on for sometimes and cuts off after 5 to 20mins. What might cause this?

[@BhajanShradha]

Nice video 👍👍👍👍👍

[@eamonhannon1103]

Can you cover the case where 5Vsb is present but the power supply main stage shuts down shortly after the green wire is connected to the black wire at the connector and the power supply used an output voltage monitor Ic to shutdown the power supply if the output voltages are too high or too low . It is difficult to trouble shoot because the power supply turns off the outputs very quickly after the power supply turns on , so it is not easy to see which output is causing the problem or if there is a fault with the voltage monitoring chip or circuit . Have you advice for this case ?

[@kalaivanana1161]

Good explanation...

[@HaseebElectronics]

Thanks and welcome

[@efzauddinsami9081]

Please discuss, what to do if i get 5v in green and purple wire but no output

[@boybravo689]

In using the series lamp while repairing the power supply in accidentally shorted the components part in the input or output the lamp absorbed the excess current in the ckt and no one parts are damaged I'm i correct sir tnx

[@tv175s3]

Can you explain how to connect the scope probe safely to not create a ground loop and a short? Since both devices, the scope and the psu are mains connected, the probe can create short.

[@eamonhannon1103]

Can you fault find power supply with fault where it shuts down on power up because of some output fault

[@Rangieh]

Thanks for sharing! My PS has no output in 3.3, 5, 12, -12 but has 5v on standby...only 4.2v in green...what is the problem, whatnparts to check? Thanks so much?

[@eltalibmohamed3321]

Thanks for your very nice tutorial engineer haseeb, please can you explain to me how the ac signal are generated in the pc power supply I couldn't find the ic controller that drives the bases of the transistors 😢

[@ramasamyjegadeesan4327]

How to check switching mosfet or transistor without removing from board.thank u

[@alchemy1]

I hope I don't get taken the wrong way. I mean this in a good way. There is short (as in short circuit or a short person, etc.) And then there is chard which is a type of beet, a vegetable. Short rhymes with sport, abort, distort, etc. Chard rhymes with hard, card, etc. Say "short circuit" and "chard circuit" and see which one is the one you mean. Just being helpful here. You are a wonderful human being and I know you won't take this the wrong way. I have a hard time saying "h". I say "itch". It is not. It is more like "ache" as in having a tooth-ache rhyms with rage, age, page and not "itch" as in scratching an itch. :-)

[@HaseebElectronics]

😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂 it is accent, as i am pakistani national (mother language Punjabi, in schools Urdu, in Office English, and with friends Arabic) so it is big mixture like cocktail in life. you are absolutely right sir. as it is our routine, "this power supply is short", "this mosfet is short", "this transistor is short" because the life is much busy and we try to save time by saying "short" instead of "short circuit" actually the best suitable and perfect term is " *short circuit"* so i am sorry for that, i will try to use proper terms in future and please accept my best regards and special thanks

[@alchemy1]

@@HaseebElectronics No, no "short" is okay. Don't say "chard" if you can help it. :-) I still have trouble with "hell, hail, hill, heel, heal", especilly with heel and heal. :-)

[@drbsr1948]

@9:40 minutes in... This series light bulb trick only works with 220V supply voltage ....am i correct?

[@HaseebElectronics]

yes dear, it is 220 volt 100watt tungsten filament lamp it limits the current due to any failure in troubleshooting process

[@drbsr1948]

@@HaseebElectronics OK I understand, So when you have the bulb in series with the 220 volt supply and you apply a ground (simulating a fault), that puts full 220volts at the bulb, I assume what you were doing with the jumper since you only showed the red lead. I don't have a power supply with a 220v/110v switch so again this trouble shooting technique, series bulb protection, would only work with a 220 V supply at the supply side of the series bulb. We use 120/240 volt supply here in US. For PC,s and other small appliances 120V,and 240 V for A/C, Hot water heaters,Oven,Dryers. Typically , windings on secondary of transformers to house is center tapped, center tap to each outer leg is 120 V with 240 volt across outside legs, so if you have a 240v feed on one side of the series bulb and ground/neutral on the other side, that would only be 120volts across the bulb. I guess the typical transformers in Pakistan household feed are single phase one winding on secondary side? Maybe you could kindly draw a sketch including the transformer for electrical service from the utility and one could better understand how this works. Thanks

[@guptasidhi1]

i am getting sb voltage about 5.1volt but when i switch green and black wire it doesn't start the power supply my ic is also 2005

[@shagunjaiswal1549]

Ca I use 10v 2200uf capacitor instead of 6.3v 2200uf capacitor in output section. Pls reply 🙏

[@HaseebElectronics]

yes the voltage range is higher. it is safe you can use it

[@shagunjaiswal1549]

@@HaseebElectronics thank you so much👍🙏🙏

[@kavindugimhanzoysa2565]

I am trying to repair my power supply in my case, the secondary side of the circuit, the voltage of each terminal is zero I did not use this power supply for a long time what can be the issue? basically voltage of purple wire is zero. Input voltage of photocouple is about 0.3v appreciate you thoughts

[@akhileshgope8475]

Sir can please make a small video regarding all types all diode like ...IN,fr,sr..etc...

[@vloggertabagsel]

nice video

[@user-pq5tz5pn4g]

وعليكم السلام ورحمه الله وبركاته اخي بتوفق ونجاح احل

[@denys14k]

HI! I have a quastion . i wanted to jump a compaq power supply its older , i think i jumped the wrong connector , instead of PS ON to GROUND , i thin i jumped the AUX to GROUND , now is not working , what damage u think i made now ? THX and Good luck with ur videos!!!

[@HaseebElectronics]

if you have made a short circuit between purple and black (+5v STBY) in normal cases it have no problem, just the power supply will fluctuate or turn off some models have 7805 regulator IC to give regulated 5 volt for SB so if there is 7805 (3 pin regulator looking like a transistor or mosfet) will damaged surely, try to replace it

[@denys14k]

@@HaseebElectronics Thanks for Reply! I jumped the green one with the black , the fan had a short impulse and then stopped.

[@HaseebElectronics]

​@@denys14k okay so if the fan starts and then stops, it means the voltage supervisor ic OR over-voltage / short circuit detection is interrupting to turn off secondary power supply in this condition the STBY section is ok PWM section is ok just monitoring circuit is disabling the output

[@merakitchen4875]

Very nice

[@siddiquibilal8678]

Good work

[@KBTechbd]

Beautiful tech shared thanks

[@madewithlovebytahira2358]

fantastic one/.

[@NitishKumar-jo6zm]

Sir, my smps input bridge diode is ok, mosfet c5027 ok and 945 transistor also but after checking through series bulb then bulb glowing continuously its means input side short circuit, I can't find where it is fault. Pls help me

[@HaseebElectronics]

check power mosfets check standby section driver mosfet or smps ic check dc capacitors

[@tameromarw]

Greetings to you Tex contains tl494 Vcc voltage starts at 17 volts and goes up to 19 volts is this normal I changed the tl494 gas capacitor and the voltage didn't change What's the reason

[@hanekhan9633]

Thank you so much Sir

[@HaseebElectronics]

Most welcome

[@techeng3940]

Where can I find atx psu schematics?

[@ohmware2020]

hello , my atx power supply is keep restarting, its going to on off repeatedly, i used to bridge green wire and black wire, and it keeos on off

[@foodtubepk7059]

Informative bro ! ❤️❤️

[@ohmware2020]

hello sir , can you show as how to make that series light bulb for testing? any diagram?

#189 How to repair Computer Power Supply /ATX

[@MehdiEkbatani-c7f]

Hello and thanks a lot for your great content... I have a power supply whose output voltage is 12.4 volts and 5.2 volts... at 12 volts the voltage fluctuates at about 1/10th... Is this voltage OK? Or it must be exactly a solid 12 volts?

[@brightstar512]

Nice educational video. i have standby on my power supply. but it does not turn on. i check it with power supply tester it beeps and the PG light is off. What can be wrong ? Thanks

[@neto4190]

Good job like.

[@arefmohammadzadeh8560]

very good... thank you

[@MatinModak]

Hi sir I want to repair atx0300p5wc, kindly share how to repair it.

[@oumarabagaro1523]

Thanks 👍

[@electroniquepassion]

*Thank you 👍*

[@math3390]

I love your videos, my SMPS have output coil burned, can I replace it with coil from other SMPS power supply? Thank you.

[@kavindugimhanzoysa2565]

Thanks bro, I am also repairing my ATX circuit board, It is similar to the 2nd datasheet(the big one) you show us. Where did you find this, Could you please share it with us? Thanks again, this session is really nice, and useful.

[@eamonhannon1103]

But you can't check the voltages if the PSU has turned off

[@AnandKumar-ym9yw]

😍😍😍 thnx

[@HaseebElectronics]

best regards

[@nischalhomey]

Fourteenth lk. Good morning bhai🙋

[@TheWeftmen]

Sir, I want to remind some atx computer power supply on the purple wire give 5 volt but green wire give 2.4 volt, some atx psu purple wire give 5 volt and green wire give 5 volt according to manufacturer, is this true ?

[@HaseebElectronics]

yes dear, it is true, basically it depends on ATX supervisor IC. when is PSON pin is less than 0.8 volt approximately, it turns ON the power, the voltage value above than 0.8 volt is considered logic high, so this IC will stop switching on green wire if we find voltage above than 1 volt normally above 2.5 to 5 volts. it is logic high. so it is okay, if we find 2.5 volt or 5 volt because we have to connect green wire to ground to drop its voltage to ground potential, so that the ic will start powering ON

[@TheWeftmen]

@@HaseebElectronics okay thank you so much

[@hichamtassi1753]

Salam M.Haseeb, i tried to troubleshoot a PSU that has no output. As per your video: 0- The 5Vsb has a separate small PCB with PWM(top244p) and works fine 1- the series lamp flashes quickly at power on 2- I do have 5v at the purple wire 3- I have3.5v at the green wire 4- the 12v gives 10v then decreases untill it dies 5- the PWM ic (UC3845BN) has no VCC 6- i do have 324v dc at the main capacitors I tried to look for some shorted capacitors, but when i take them out of the PCB, they are fine, so i replaced them. Thanks.

[@hichamtassi1753]

@@HaseebElectronics OK, i will try that, no need to check the 3.3v and 5v section yet, because it is the same for them, they start with some voltage then die... Thank you

[@sparkigner908]

Sir in my power supply 5v output avaiabile but no voltage at green wire what the reson sir please help me i tring so many month to finding its issue

[@HaseebElectronics]

there is a current limiting resistor which is connected between purple and green wire, check that resistor in some power supplies, the atx supervisor ic provides voltage on green wire (which are provided by the atx supervisor ic, as TL494, SG6105, and if the ic is fail to provided regulated reference voltage , in that case you have to replace atx supervisor ic)

[@sparkigner908]

@@HaseebElectronics in this power supply 2921 is used . Any way thanks for replay sir🖒

[@HaseebElectronics]

@@sparkigner908 sdc2921 case there should a current limiting resistor connected between pin 9 and purple wire. green wire will also connected to pin 9 of 2921

[@sparkigner908]

@@HaseebElectronics ok sir i checking

[@TheWeftmen]

okay sir, if we have 5 volt but we don't have 3.3 volt and don't have 12 volt, what should we do? Where is the problem ???

[@HaseebElectronics]

in this case the secondary power section is not turning on. most of time there is a supervisor IC that monitors the output section, when any output goes beyond its allowed limits, in that case the smps section remains off. in this case if we want to repair it, first of all disable its protection for 3.3 volt, 5 volt and 12 volt and turns on the PWM IC directly and after repairing reconnect protection network

[@TheWeftmen]

@@HaseebElectronics okay, but I can not disable the TL494 IC protection, I don't know how should I do this

[@HaseebElectronics]

@@TheWeftmen is there any other ic except TL494. or there must be a protection circuit or ic

[@TheWeftmen]

@@HaseebElectronics thank you for answer, on my psu motherboard have TL494 and near AZ339

[@HaseebElectronics]

@@TheWeftmen check 339 might be it is used as voltage supervisor

[@randhirarts938]

Power supply me yellow and purple ko connect kerne se on ho rahi hai. Voltage 6 aa rha hai, kya karan ho sakta hai. Please explain in your video

[@HaseebElectronics]

that is wrong green power on command signal he agr aap purple ko yellow k saath milaa rahey hein to it means k supply ka secondary section on nahi ho rahaa he

[@hillaryaura7244]

am following thru,in this video/you did not take care of the auxiliary circuit, explain how .I missed that 😊

[@HaseebElectronics]

Sorry for that. in upcoming session we will make a deep surgery for this aux section as well best regards

[@PatrickRibbsaeter]

thanks master

[@HaseebElectronics]

You are welcome

[@arunkumar-bh2dp]

very useful.

[@mon-alarby]

صباح الهنا 👍 👀👈👈

[@electronicrepair5060]

Mr haseeb I hope you explain the right way to check comparator in urgent thank you.

[@electronicrepair5060]

Thanks for replying

[@GelaFood]

Awesome

[@radiotvrepair1059]

Salm aalaikom when i found schematic diagram for atx power supply

[@DarsKitchen]

Great Video Like 39

[@ezracasco9166]

next video please about est.7627a ic in atx .