{824} SMPS Output Is High, Fluctuating and Noise
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- Опубликовано: 3 авг 2024
- in this video {824} SMPS Output Is High, Fluctuating and Noise. i demonstrated how to repair a switch mode power supply SMPS model number, S-500-12 it is 12v 40 ampere 500 watt industrial power supply,
problem in this power supply that,
1. output voltage were high than the rated voltage. it was providing above 17 volts instead of 12v.
2. output voltage were fluctuating from 17 volt to 20 volt
3. output unregulated and uncontrolled
4. smps was providing tick tick and humming and whistling sound
i found that in this KA7500 / TL494 based half bridge topology power supply, the signal amplifier transistors for isolating pulse transformer damaged. these we 2SC2655 transistors and i replaced with 2N4923 medium power transistors
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00:00 how to repair 12V 40A 500watt SMPS
00:16 smps output fluctuating with high unregulated voltage
01:04 smps tick tick humming noise / sound
01:38 smps output is unregulated and uncontrolled 
Наука
Asslamalkuam frst cmnt..... 🪴🌻Mash Allah Nice sharing information video 🪴🌻
Thanks and welcome
I
Another excellent repair. I like the use of the nail clippers to cut the excess off the component leads. 😀
best regards and special thanks
yes nail cutter is really useful tool
I had over output problem I repair this problem from feedback circuit. I apply the knowledge given by you. Thanks again.
You are welcome
yes brother uncontrolled over voltage conditions have many possibilities
Sir, Thank you for sharing your great electronics knowledge and experience in a very understanding way. Thank you for giving me the the greatest gift anyone could give, the gift of knowledge. Many Thanks!
Thank you ,Sir
I came back here because i have similar issue👍🏻 but with a small smps(charger). Thank you 🌹
you are best teacher who is showing on internet since this time. thanks
Tamir videosu izlemek daha zevkli.Ama burada olan hassas bilgiler başka başka bir yerde yok. Sayğı ve selamlar.Güzel ve değerli insan.
8.dakikadaki transistör testinde da arızaı olduğunu nasıl anladı o kısmı anladınızmı siz?
@@Yorumcu63 Selam kardeşim. 2 adet 2sc2655 anahtarlama npn transistör 1 ucunda diyot değeri var. Diğer uç açık devredir. Açık devre olması nedeniyle görevini yapamaz. Bozulmuş.Sağlıklı günler dilerim.
@@kaizen1071 Çok tesekkürler .
Excellent mr haseeb and thanks for sharing knowledge 👌👌👍👍
with your videos we're always learning. Thaks.
Another great lesson and amazing work. Thanks
best regards
Enjoy watching your videos, Haseeb. Thank you.
I like it.
Every video of yours i learn a thing.
Thanks.
You are welcome!
Excellent work thanks for sharing dear brother
thanks haseeb for all videos from algeria 👍
best regards
Knowledgeable and informative vedeo. Thank u so much . God bless you.
Thanks and welcome
Excellent
Very Nice method of explaining
I've seen on Mr. Carlson's Lab where you can take those apart. It's been a while since I've seen it, but worth watching. May not be worth taking apart though since fans are so cheap. I think the one he took apart was just dirty. If bearings are bad it might not be worth it either. Take care.
Great teacher
سلام مهندس عالی خسته نباشی محسن ایران...
Appreciate all you efforts sir.
best regards
Good brother
Excellent thanks for sharing
thanks a lot
thanks very much again sir for sharing your knowledge...God bless.
thanks a lot for your valuable words
Interesting failure and great vid!!! My humble thanks 👍👍
yes dear brother it is really awesome
The absolute right way to work..sir..
thanks a lot dear brother
Like mashallah excellent 👌 informative vedio thanks for sharing
best regards
Mashaallah nice explanation sir
best regards and special thanks
Very good and useful information sir thanks for sharing this knowledge to us
Most welcome
🙏Grazie 🤩
Thanku sir🙏
Parabéns muito bom !
atenciosamente. saudações
Good Morning & Best Wishes Like This Good Video
best regards and special thanks bhai
Good job
Thanks for sharing sir regards
Most welcome
I injoyed this video.
best regards
Thank you Sir
Most welcome
excellent repair video.
Very good 👍👍
Thank you very much
Thanks....sir ji
it is my pleasure
Assalam alikum sir
Great video and great information
Sir ak UPS ke circuit pr video bnain jis man us ke har parts or function kase kam krta hai ic ka kia functions hai details se btain please
regards Amir
Nice tutorial video sir.
Please, what type of desoldering pump did you use in removing those amplifier transistors?
Hi sir its good to teach us new things about electronics could u show us how to wind wash machine washing motor and spin motor does the have difference
Great video, thank you! Please use an extraction fan, your grand children will thank you ❤️
What is that?
@@W1RMD like a fan with a charcoal filter on it, to extract the smoke during soldering. Those fumes are bad to inhale, especially when you do this all day long.
@@vadimm6432 Oh, Okay. Haseeb did a solder safety video on this about a year ago.
i am really thankful for your valuable point of personal safety. we must take take for personal and equipment safety all the time. specially personal safety is most important and it must be at top priority all the time
MashAllah great
best regards
Super
Thanks a lot
Exillent, I think bad fan was the main reason for the transistors to fail due to overheating
👍
Hello! Thank you for the video! What is the standard to replace transistor 2SC2655 with 2N4923? Thank you!
🙏🏻🙏🏻🙏🏻🙏🏻
best regards and special thanks
جزاكم الله خيرًا على مشاركة مقاطع فيديو شيقة
I will always follow your channel, If I may ask, I have an ATX brand delta electronics that uses a DNA 1001/2 IC, but I'm having trouble finding a point to make the voltage adjustable. Please help
Can you please make a video about load test on this power supply and how to calculate the resistive load for any power supply for testing purpose.
Jazak Allah Khair .
Asaalamualaikum, very nice video. I want to ask about surge arrestor in smd board. Can u explain how to test its ok or not ok?
Thank you for the video! How do you have the light hooked up? What is the purpose?
most welcome
are you asking for the series lamp. it is connected in series of line voltage. if there is something wring in the power supply, it will illuminate, and it will damage more
@@HaseebElectronics Oh interesting, so it is essentially checking if there are shorts or low impedance paths to neutral or Line (depending where the lamp is inserted)?
Hi brother namaskaar.
Thank you for sharing this video.
Wich component is producing
humming noise..,when the circuit is faulty.
Have a great day 🙏
clicking / humming / whistling sounds are most of the time from transformer, it becomes due to saturation condition of the core. it is due to uncontrolled primary current, it finishes with proper conduction
if this sound is available at normal situation, in that time may be primary winding is loose or sometimes core halves become separated,
@@HaseebElectronics Thank you for your reply 🙏
I have the same supply 12v40A but burn in18v 23A through booster 1500w module.is this 40A support.
What to blame when the ocp get triggered at very few current absorption (around 150 ma) on a pc smps?All the output except for the 3,3 v line works great and the power supply is almost in new condition.
Could also be the under voltage protection triggering in? The 3,3v rail is supposed to provide at least ten times the current available in this condition. What do you think it could be the real cause of the issue?
Great knowlodge
How understand bad transistors in 08:00 measuring ?(Not see multimeter screen ) Could you make a short describe?
were they the same values as the test you did after disassembling?
Esselamu Aleykum
I have a similar power supply can I replace the npn transistor with an n chanel egbt
Hello, I have a question. As a result of connecting a high current fuse to the power supply of the steam machine I use at home, I changed it because the mosfet, zener diode, ntc and 2 watt resistor on the primary floor failed. I can get 12 and 35 volts on both of the outputs, but when I connect the power board to the motherboard, it shows 12v as 2.5 volts and 35v as 16 volts, so the fan and water evaporator are not working. I also changed the capacitors at the outputs of the power board. What other parts on the power board should I check? thanks
Akım izleme direncini kontrol et.Anakart istediği akımı alamadığı için çıkış voltajı çöküyor.Bunun içinde anahtarlama mosfetini ve pwm entegresini kontrol et
@@elektronikhobim6903 Akım takip direnci dediğiniz, Primer katındaki yüksek whattli dirençler mi
Assalamualaikum sir,
Sir LED universal card pr b video bnain
मेरे दोस्त आप English chennal मे जो वीडियो डालते हैं उसी वीडियो ऊर्दू chennal मे काफी बाकी है लास्ट 5 से 6 महीने से देखता हू हमारा भी उर्दू वाले को भी ख्याल रखे नमस्कार
just out of interest, is it safe to work on circuits while under limiter and for how long for trouble shooting ?
thanks for your valuable comment
yes it is safe to working under limiter. and we can proceed the troubleshooting, because the series lamp allows the safe limit, (if lamp is 60 watt, then the UUT will not receive more than 60 watts, so we can work in safe limits)
Sir, what is the name of that desoldering tool you used?
Tenho uma fontes oscilando led piscando.fica variando tem todo a voltagem. Obg
LED pisca devido ao capacitor VCC, (perto do controlador smps ic)
qualquer componente de curto-circuito no lado secundário
por favor verifique o vídeo número 876 para mais detalhes
Merhaba
8.dakikadaki transistör testinde transistörlerin arızalı olduğunu nasıl anladı o kısmı anlatacak arkadaş varmı acaba?( Multimetre görülmüyor)
How understand bad transistors in 08:00 measuring ? (Not see multimeter screen ) Could you make a short describe?
were they the same values as the test you did after disassembling?
i am sorry for inconvenience. no problem, i will demonstrate again with complete details and test parameters
How to determine which substitute transistor can be used if we don't have exact part, please make a video on this topic....
Sir give information about how you replace transistor (how read parameters)
So what component was doing the clicking sound before repair?
this clicking sound from the transformer's saturation condition
when there is uncontrolled switching, it produces this kind of clicking and humming sounds
Thanks for the valuable video and excellent teaching,I have a problem please help me
SMPS,2000w,52v out put(saft PM18R)
Fault-Giving 72V output and shutdown
PWM Controller-UC2875DWP ,PFC IC-UC2854 ,FULL BRIDGE
SYMPTOMS-DC VOLTAGE 420v, Vcc ok and stable, OPTOCOUPLER input 1.1v,output 100mv,changed the optocoupler but doesn’t help,reference voltage 5v
Please advise me
👍👍👍🤲🤲🤲
My acer "Liteon ps-5221-9ae" computer power supply also have same problem. Series lamp illuminate high speed and after few seconds turn off power supply. it has TN277PN IC and CM6802AHG IC in primary side. stand by voltage ok. TNY277 IC D -S voltage same as Capacitor voltage. mosfet and diode also good. what is the problem here. primary side or secondary side. please help sir
What is the best windows simulator for smps?
Hello, i m curious what is wrong when on high voltage capacitor (smps) metering 430 volts instead the usually 330v ? Thank you
when the smps transformer starts ringing, and it's RCD snubber is not functioning
it causes to elevate the voltage at bulk capacitor
at this situation destroy the capacitor, MOSFET etc
morover if the EMI filter is resonating beyond corner frequency of the filter
then that EMI filter also starts ringing or self oscillation
which causes to increase the input voltage of bridge rectifier
in this scenario, check ac voltage at ac input terminal
then compare ac voltage at bridge rectifier input pins
if ac input terminal and bridge rectifier input pins have a large difference
then the possibility is emi filter
Asslamalekum
best regards
Salam alaykum, where can I get a circuit diagram for this PSU?
After 2 to 3 minutes the fuse is getting wasted of power supply but all part is ok only fuse burn which problem please reply
Oye amigo tengo un con esta fuente el ventilador tiene 20 voltios pero cuando lo el ventilador baja 4.2 a 5.4 voltios necesito unos tic que hacer muchas bendiciones.
Amigo tengo un problema con esta misma fuente el conector del ventilador tengo 20 voltios pero cuando conecto el ventilador baja a 4.2 voltios y gira muy suave el ventilador gracias de antemano
Sir I have one SMPS and it is 110 and 240 input and 12 voltage DC output. But now it only works with 110 input not working with 240, please help me to solve this type of problem
Sometimes you can repair a stuck fan by removing the sticker on the axis , and putting a drop of WD40 inside.
Hi why does my series lamp stay on when the power supply is working okay
some power supplies are high rating and some of them have PFC circuit, which consumes the power
moreover low wattage rating for the lamp also cause to illuminate it
Thanks for the reply I appreciate the advice, and your full explanation, for me I am getting to understand electronics.
Why they use an npn rather than a mosfet
میں کھلے اجزاء کا پتہ کیسے لگائیں اور کیا غور کیا جانا چاہئے؟
Nice video !
I like these way you show what you check and ...
Well done it works !
Check it with the LED lamps as a load
and install the ventilator quick for a permanent cooling before testing
(and close the case. When a capacitor explode and it is closed = ok all persons are alive and without foil an fragments in the face + skin)
Thumps up : you cleaned our table = yes you are professional or as a amateur learned the hard way what can (and will) happen.
Thumps up : you have a weller soldering iron and a sucktion welding iron.
Thumps up : nice check (I desolder the big capacitors and check these (short circuit and the capaity value with a special instrument)
I hope your very big transistors have a low basis current . the smal worse transitor usally need low current for work.
And small transistors have better amplification ratio than the medium ones you used. Buttwell it works.
AdditionaI add aluminium cooling sheet metal for the full bridge rectifier.
Must be a very cheap brand because no manufacturer name at the sticker.
If checkfor the words X2 or Y2 at the RFI capacitor between low voltage and high voltage area.
If these are cheap types it is possible when these fail to have ... But well it is usuall in my country and I have used old capacitor in best condition from technical broken devices (and I can buy these in my area for low/medium amount of money if needed).
My thumps up for your video.
The digital multimeter have a (like all ditial ones) a slow conversion rat at the display. The voltage is jumping ...
Sometimes I check these with a (nor cheap) oscilloscope (and a transformer to isolate the scope ground in case of ...)
The light bulp in you main power cord is perfect fpr your safty and the circuit.
thanks a lot and special thanks for your valuable comment
Check it with the LED lamps as a load. ( *i use resistive load for test*
ventilator is really great suggestion. i will arrange it
Thumps up : you cleaned our table = *THANKS A LOT*
Thumps up : *YES GOOD REWORK TOOLS ARE IMPORTANT FOR BEST RESULTS*
Thumps up : *THANKS A LOT*
regarding transistors, the medium power transistor is very close to the original transistor
yes it is cheap brand with compromised quality
i am using this lamp just only for video purpose, otherwise the bench based series lamps are away from the camera range,
please accept my best regards