Hello dear, I hope you are well. I wanted to know if you can help me, I removed the current protection from my atx source to prevent it from turning off with large loads, I did the steps you did in a video that you explained how to remove this protection from atx sources, everything worked fine until I accidentally made a short circuit between 12v and GND and it doesn't turn on anymore, it's a source with the IC KA7500 to which I did the trick to remove the protection as you did in one of your videos. Do you know where I should start to fix the source?
sir i have same power supply with tl494 and lm 339 ic in output side. when i turn it on the standby 5v is ok but i dont have output voltage after ps on . what is the cause and how to check. there is no any shorting in components.
Is it sufficient to change only the 2 shorted diodes of the bridge rectifier or all the 4 should be changed. Can we assume that 2 good diodes may also gone through high amp but not shorted for the time being but may become bad in near future. Also should we replace diodes of same no. and batch or it is ok to use different batch or equivalent . The same questions applies to the 2 switching transistors (generally 13007). In some branded smps 2 mosfets are used in parallel there also the same question arises. Please explain your opinion on the matter and if possible make a video.
Hi Haseeb, quick question, do you or have you ever used an esr capacitor meter in your repairs and if so did you find it useful or did you find it easier to remove the cap for testing out of circuit?
I think big capasitors in series is possible to test without desoldering by proper esr meter. But those caps in parallel on 12-5-3.3v lines - you need check it one by one with desoldering.
yes i have ESR meter and use it to detect suspected electrolyte capacitors. it is very useful tool to detect the intermittent faults best practice to test a capacitor is to remove it from pcb. in this way the exact capacitance can be measured while in pcb it gives some marginal readings.
@@HaseebElectronics thanks for the reply, I usually remove for testing but now that its all going smd/smt which can be more difficult I was thinking of getting a cheap esr.
Informative video..👍 quick question I have a smps which is having 48VDC output for ebike battery charger.. the smps gives output when AC is given but charging led won't turn on and fan is also not rotating? Thanks and regards..🙌😊
Can you explain complete details about standby section. Bcuz I am unable to find any faulty comments in standby section but still it is not provide ouput..
i have weller WR3M rework station it have soldering iron desoldering iron hot air gun vacuum pick up you check video number 511 as well to see my rework tools
Ussalaam-o-alaikum What modification/improvement we can make in a desktop computer power supply so that the PC does not restart when when switching from WAPDA to UPS?
Sir I have 5 smps . Normal frontech make. All are repaired by me. When i run the smps its starts but when i connect it with motherboard display not com. Then i checked the smps and found 5v. Stb not getting from smps. I can not understand where is the problem. I changed the ic with new one but problem not resolved. Sir if you have any idea please share it with me i shall ve greatful to you.
in this situation when you have a working power supply and it is not working with motherboard check PG power good signal grey wire most of the time this is fail
if PG signal power good is fail the power supply will never allow to processor to work as it is a certificate from power supply to the processor that the power supply is good if this signal is missing the processor will never start because this signal is compulsory to enable the pson latch circuit
Resp Sir! Very Nice Class Sir. Sir Ur Area Current Fluctuations Good Sir. My Tribal Area Current Fluctuations Very Bad Sir. Ur Vedios are Very Simple Repairs Classes Sir. That Problems Here not Equal Sir. Here Sir Series Lamps On off, On Off 5 Times Sir and Directed DC 12V Sir PG 5V Passed Through PS On Only Sir. Bu PS On Off the Total DC Voltage Sir. AC off after on Same Problem Sir. Complicated Problems Here SMPSs Sir. AC Freequency Difference Sir or not Sir. -- ChinnaRao Paderu Andhrapradesh
Haseeb this is getting uncanny at this point.. I literally have an almost NEW 300w Gigabyte OEM PSU that comes from a prebuilt PC that just won't boot up. It's on my workbench right now, waiting for me to tinker. How are you doing this? 😂 Haseeb must be injecting spyware into our homes or something 🤣 He knows exactly what we need.
😂😂😂 first if all Good Morning and best wishes then special thanks for your 💕 message then salutes for your valuable words for my efforts I love to share my routines with my viewers so that it may be helpful for someone it is my pleasure
Thank you sir and have a great rest of the weekend!
Same to you
Walaikumsalam wa rehmatullahe wa barakatuhu
JazakAllah for sharing v informative n v helpful video.. big like 👍👍 may Allah always bless u ameen
best regards and special thanks
Mr. Haseeb the great fixer like no other 👍
thanks a lot dear brother
Excellent video dear friend, have a happy Sunday!
many many thanks dear friend
Interesting! I'm learning a lot from you. Thank u very much brother. More power.
best regards and special thanks for your valuable comment
Haseeb bhai Namaskaar 🙏
Thank you for the video
Namaskar bhai
thanks for your valuable comment
Hello dear, I hope you are well.
I wanted to know if you can help me, I removed the current protection from my atx source to prevent it from turning off with large loads, I did the steps you did in a video that you explained how to remove this protection from atx sources, everything worked fine until I accidentally made a short circuit between 12v and GND and it doesn't turn on anymore, it's a source with the IC KA7500 to which I did the trick to remove the protection as you did in one of your videos. Do you know where I should start to fix the source?
Mashallah very nice explanation as always thanks 👍👍
thanks a lot dear sister
how are you, hope you and your family is is in good health
Allah bless you and your family
@@HaseebElectronics Thank U Sir.
An excellent example of circuit troubleshooting.....thank you!
You're welcome!
sir i have same power supply with tl494 and lm 339 ic in output side. when i turn it on the standby 5v is ok but i dont have output voltage after ps on . what is the cause and how to check. there is no any shorting in components.
Like Karta hun Aap Ke Kaam ko Bhai Saab
Bahut shukriya piarey bhai
Is it sufficient to change only the 2 shorted diodes of the bridge rectifier or all the 4 should be changed. Can we assume that 2 good diodes may also gone through high amp but not shorted for the time being but may become bad in near future. Also should we replace diodes of same no. and batch or it is ok to use different batch or equivalent . The same questions applies to the 2 switching transistors (generally 13007). In some branded smps 2 mosfets are used in parallel there also the same question arises. Please explain your opinion on the matter and if possible make a video.
4 me i change all of them
i have 3 cooler master 450w of which one of them has active PFC, fuse & bridge all ok, but no 5Vsb on all 3, any suggestions to repair them.
please check the voltage supervisor section
check the optocouplers'
in first stage PFC circuit must turn ON then the PWM circuit will turn ON
Very nice video ! Can you explain the principle of Op Amps used in ATX to monitor the output voltage ? Thank you & Salam Aleikum.
Good tiching karte hai 👌👍👍👍👌
thanks a lot
Hi Haseeb, quick question, do you or have you ever used an esr capacitor meter in your repairs and if so did you find it useful or did you find it easier to remove the cap for testing out of circuit?
I think big capasitors in series is possible to test without desoldering by proper esr meter. But those caps in parallel on 12-5-3.3v lines - you need check it one by one with desoldering.
yes i have ESR meter and use it to detect suspected electrolyte capacitors. it is very useful tool to detect the intermittent faults
best practice to test a capacitor is to remove it from pcb. in this way the exact capacitance can be measured while in pcb it gives some marginal readings.
@Igor Morozov you are right. the best practice is to remove it from PCB
@@HaseebElectronics thanks for the reply, I usually remove for testing but now that its all going smd/smt which can be more difficult I was thinking of getting a cheap esr.
Informative video..👍 quick question I have a smps which is having 48VDC output for ebike battery charger.. the smps gives output when AC is given but charging led won't turn on and fan is also not rotating? Thanks and regards..🙌😊
Hi friend thanks for another informative video
most welcome
Excelente, los vídeos de reparación son muy enriquecedor. Saludos desde Colombia 🇨🇴
muy bienvenido querido amigo. Estoy agradecido por tus palabras de oro.
MASHALLAH
VERY GOOD KEEP SHARING
thanks a lot
Mashallah Weldon bahi keep sharing
best regards and special thanks
So nice sharing bhai
Thank you so much
Great video
Helpful video sir thank you very much.
thanks a lot dear brother
Can you explain complete details about standby section.
Bcuz I am unable to find any faulty comments in standby section but still it is not provide ouput..
Good job sir. More repair videos
Thanks, will do more and more videos
تبارك الله عليك الله يعطيك الصحة 🌷👍
thanks a lot
best regards and special thanks for watching
Thanks for another interesting video.
i am thankful for your encouraging comment
please accept my best regards
Thank you
Great video as always ⚘️
it is my pleasure
MashaAllah you are awesome sir.. great job
Jazaak Allah khairan dear brother
Sir what kind of soldering iron you are using? It's look like 2 in 1 soldering and sucking led!
i have weller WR3M rework station
it have soldering iron
desoldering iron
hot air gun
vacuum pick up
you check video number 511 as well to see my rework tools
@@HaseebElectronics thank you
Zberdast sharing bai
special thanks
Nice job, thx for video😊👌🏻
thanks a lot dear friend
lk thanks for sharing gd mrng
thanks a lot
Ussalaam-o-alaikum
What modification/improvement we can make in a desktop computer power supply so that the PC does not restart when when switching from WAPDA to UPS?
really appreciate good information
thanks Raj Bhai
Thank you very much sir 🙏🙏🙏
Most welcome
I had the same problem but now i hv all the voltages correctly even the standby lightof the computer is on but it doesnt power on...plz help
Jazakallah khairah ,,,,, 👍
Allah Bless you dear brother
Sir I have 5 smps . Normal frontech make. All are repaired by me. When i run the smps its starts but when i connect it with motherboard display not com. Then i checked the smps and found 5v. Stb not getting from smps. I can not understand where is the problem. I changed the ic with new one but problem not resolved. Sir if you have any idea please share it with me i shall ve greatful to you.
in this situation
when you have a working power supply
and it is not working with motherboard
check PG power good signal grey wire
most of the time this is fail
if PG signal power good is fail
the power supply will never allow to processor to work
as it is a certificate from power supply to the processor that the power supply is good
if this signal is missing
the processor will never start because this signal is compulsory to enable the pson latch circuit
Resp Sir! Very Nice Class Sir. Sir Ur Area Current Fluctuations Good Sir. My Tribal Area Current Fluctuations Very Bad Sir. Ur Vedios are Very Simple Repairs Classes Sir. That Problems Here not Equal Sir. Here Sir Series Lamps On off, On Off 5 Times Sir and Directed DC 12V Sir PG 5V Passed Through PS On Only Sir. Bu PS On Off the Total DC Voltage Sir. AC off after on Same Problem Sir. Complicated Problems Here SMPSs Sir. AC Freequency Difference Sir or not Sir. -- ChinnaRao Paderu Andhrapradesh
Sir, how to repair low PG?...
ps on and standby is ok but smps not going to on when i short green and black who to solve this problem
Congratulation for India Thomas Cup Team.
best regards and special thanks
Nice.
thanks a lot
Nice
thanks a lot
بھائی میرے پاس dc power supply ps-605 اس پروبلم ہے آوٹ پوٹ بلکل ٹھیک ہے مگر display پر volts پراپر نہیں ہے display پر زیادہ آرہا ہے please help me
EMC Filter is missing in cheep power supplies
you are right dear
to make cheaper, many safeties are bypassed by the manufacturer.
sir aap is video mai awaaz nahi aa rahi
i will check it bhai
please check this video th-cam.com/video/mA35R0ZzIj0/w-d-xo.html
Haseeb this is getting uncanny at this point.. I literally have an almost NEW 300w Gigabyte OEM PSU that comes from a prebuilt PC that just won't boot up.
It's on my workbench right now, waiting for me to tinker.
How are you doing this? 😂
Haseeb must be injecting spyware into our homes or something 🤣
He knows exactly what we need.
😂😂😂
first if all Good Morning and best wishes
then special thanks for your 💕 message
then salutes for your valuable words for my efforts
I love to share my routines with my viewers so that it may be helpful for someone
it is my pleasure
@@HaseebElectronics I’m glad I found this channel. Can we get more of I2C? Thank you for your efforts.
👍👍👋
best regards
Make it variable
sure i will continue and will try to dig it deeper
😮👍👍
mamo g sadi v khrb hogi wa 🥺
HHAHAHHAHAHAHHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAH
Allah ka shukr he
اس کو سنبھال کے رکھنا ۔ ٹھیک کر لیں گے
علیک سلام🤲