{770} SMPS Is Not Working || SMPS Not Turning ON
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- เผยแพร่เมื่อ 20 มิ.ย. 2024
- in this video number {770} SMPS Is Not Working || SMPS Not Turning ON. i explained how to troubleshoot, test and repair UC3842 current mode smps controller ic to provide 24V 2 ampere in flyback topology. this 3842 ic belongs to a complete family of KA3842, TL3842, MIC38HC42, UC3843, KA3843, TL3843, MIC38HC43, UC3844, KA3844, TL3844, MIC38HC44, UC3845, KA3845, TL3845, MIC38HC45, all the above mentioned ics have approximately similar circuits. i found the smps controller, vcc capacitor, vcc rectifier, and 2x zener rectifiers, and one SCR in protection circuit.
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00:00 How to repair smps, have no power, not turning on, not working
02:51 How to Replace IC in the board
05:02 how to test polar or polarized dc capacitor
08:40 how to get / find / download circuit diagram / schematic for the SMPS circuit
09:21 SMPS power supply have strange tick tick whistling sound
09:39 How to fix SMPS Low output voltage with fluctuation
14:20 SMPS have very high uncontrolled output voltage than the rated voltage
15:08 How to Test P421 or TLP421 optocoupler IC
16:26 P421 or TLP421 equivalent - วิทยาศาสตร์และเทคโนโลยี
Thank you Sir for your explanation. Please which component is causing a switching sound and which type of zener you'll use to replace the Defective one
Thnaks a lot
it is due to transformer and the EMI Suppression ferrite beads / Anti Parasitic Ferrite Beads EMI Rings (installed on the mosfet pins)
i will replace c27 (27 volt zener) and 24 volt zener 1 watt and 1 SCR upto 10 ampere.
when i will arrange these parts, i will share its installation, diagram and testing
@@HaseebElectronics is SCR a transistor
SCR IS silicon controlled rectifier
it is used for protection
@@HaseebElectronics Resp Sir! Thank U Very much for Ur Advice Sir. C27 Volt Zeener, 24V Zeener 1Watt & One SCR Upto 10ampere Here were not there in the Shopes Sir. Please arrange Sir and C3866 FETs 12 Numbers Required for Other SMPSs Sir. How to Pay Amount Sir through Ponepay or SBI Yono Sir. Extreamely Sory for U Disturbance Sir. Iam Very Hill Mounts Areas Sir. -- ChinnaRao, Paderu, Visakhapatnam Dist. Andhrapradesh.
brother I am in Jordan, components here in Jordan are much expensive due to high exchange rate of Jordanian Dinar.
moreover the shipping charges are too high
I will check tomorrow and will reply. because to send or receive any electronics parts and items needs a special customs approval.
I will check. if it will easy and economic
I will send
if the shipping charges are much high
then I will not recommend to purchase components from this country
Master of power supply circuit
Thanks 🙏👍👍
best regards
You are great sir
Very useful video
This is a lesson for us
Keep sharing
best regards
This channel is very helpful to many. God bless
best regards
It's good that this SMPS was repairable. So many these days have components encapsulated in tar, making it impossible to repair.
best regards
to conceal the designs and to protect the designs from weather effect, the circuits are coated.
silicon coatings are removable but epoxy coatings are hard to demolish
Weldon keep sharing
thanks a lot
Informative vedeo. Thanku so much.
best regards and special thanks
Love your channel bud. Explaining everything is so helpful to me. THANK YOU.
it is my pleasure
Very good and useful information sir thanks for sharing this knowledge to us
it is my pleasure
Excellent repair.i love the close up video.very clear explanation.
best regards
it is my pleasure
Informative video. thanks sir
best regards
بارك الله فيك ونفع بك
Thank you very much for this repairing video Sir Haseeb
You are welcome
Awesome upload dear friend, have a happy Sunday 😊
best regards dear friend
Thanks sir for sharing...
Most welcome
Nice sharing
nice job i am fixing a macbook 85w adapter. it seems that the opticoupler is bad not giving the proper ratio. thanks! how do you find out the value of a resistor if it is completely burned off the color bars. do you trace the resistor to the ic and look at the sample circuit?
Nice information sharing.
it is my pleasure
The Genius Teacher Stay Blessed Dear Respected Brother!
Allah aap ko salaamat rakhey aameen
great video dear haseeb sir. thank you for sharing with us. you are a true teacher :)
thanks a lot dear brother
thanks for very informative video
Sir,oh my God, this much components failed,then, why? You tried thebest😊
Walekum Àssalam
Great upload
best regards and special thanks
You are really helping us here tackling power electronics.. my question here is I usually design smps solar inverter but anytime i power on the inverter its working smooth but the high side MOSFET usually heat up at a very high temperature and get blown while the low side MOSFET is cool i am using tl494 ic my transformer calculations are correct which i got here from you but still i don't knw how tackle this issue pls can you help me.. What might be the issue i only find this issue when building high frequency push pull inverter. Pls help me out this is the 8th times am trying this but same problem pls help me. ?
Walikum Salaam Janab bhai Saab
thanks a lot
Well done Haseeb 👍
most welcome
ကောင်ပါတယ်ဆရာရယ်
ကျေဇူတင်ပါတယ်👍
Wonderful video. Thanks
thank you sir for sharing this informative video .
it is my pleasure
Great info....many thanks, sir.
best regards
Master Chief and professor wow that was so cool
best regards and special thanks for your valuable comment
Good video sir👌👌👌
best regards dear brother
great teacher ❤❤❤❤
Thank you for your great videos, keep growing, and keep continue........
So nice of you
Great repair!
Sir is possible to build our own smps power supply for amplifier which has stable out put of +15v and -15v , +35v and -35v if is yes please share us video thanks
Can you tell me!!!
yes
it is doable, just we need to calculate and design the smps transformer and then design the circuit. the transformer must meet the power requirements and the circuit must be capable to drive that transformer. a properly calculated feedback network will provide regulation
its complete calculation and design is a very lengthy project
i will try to check if i can find some design sample. i will share it
Thank you M. Hasseb, model of your Iron soder please
best regards
it is WELLER WR3M EST safe rework station
made in Germany
جزاك الله خيرا
thanks a lot dear brother
amazing video.
it is my pleasure
Thank you for your clear and detail explanation, please can you make a video on how to use Test lamp and what each sign of the test lamp means, this will help me in proper diagnoses
This video is very educational and interesting.
it is my pleasure
Super this time👌
best regards
Thank you very much sir 🙏🙏🙏
most welcome
Hello and thank you for sharing...please show us how did you build that desoldering vacuum machine ?
Resp Sir! Excellent Video Sir. Sir Dell Optiplex 3020, 180Watt 6&4Pin SMPS PS On 5V Ok Sir, but 12V Directed Pass on Sir. Green & Black Connected after PG 5V Paased Sir, only 12V was Directed Sir and Series Lamp was on off on off Continued Sir, New Fets was chaned Sir and near 12V to 12V small Bulb was Connected this Glowing on off on off, Which Problem Sir. Please Advise Sir. -- ChinnaRao, Paderu, Visakhapatnam Dist, Andhra Pradesh.
Thank you for taking the time and sharing with us your knowledge.
it is my pleasure
@@HaseebElectronics Hello Mr Haseeb. I liked your solder/desolder tool. Is it possible to tell me the model to see If I can find it. Thank you.
it is weller WR3M rework station
bit.ly/3ZGDjn1
@@HaseebElectronics Thank you very much. I appreciate it.
Hi, haseeb, I have a question here, when troubleshooting such motherboard and u find out that, one of resistor burns black and no visible colour code on it and there is no value printed on motherboard. So how how will u replace the resistor?
in this situation we need to download the datasheet, application note, sample circuit or typical application circuit for that main component or IC. so we can get a very closer value for that burnt out component.
otherwise it needs a detailed and too much time consuming reverse engineering to recalculate the all components to find the burnt out component value
@@HaseebElectronics thanks sir, and keep up with great work! You helping other as well learnt troubleshooting techniques cheers
Thank you for sharing your knowledge, may allah swt rewards you
Today you get new subscription and follower 😊
Thanks and welcome
Good video sir.. Thank you..
Most welcome
wow really great
best regards
Allah bless you brother excellent work 👍
Many many thanks
I'm cheap. I used my hand sterilizer alcohol/gel to remove the flux, then washed off the leftovers with water. Worked great. LOL I had to replace 7 bad electrolytic capacitors in my Lenovo ThinkCentre m58p computer PSU. One bad cap in particular was causing the computer to be stuck in boot looping status. The rest of the bad caps were bulging at the top and thus needed to be replaced. So that was about $9.53 to fix the PSU.
Interesting 👍👋
best regards
great sir.
it is my pleasure
Very good video .
Thank you very much.
I would like to ask you gratfully if you can make a video about a pc desktop , step by step from 5v stand-by to the output 3.3v until reaching the microprocessor and describing successively all the components.
Sincerely
I think first optocoupler is failed, then scr and zener, which rise in current in switching ic and fry it.
yes
i think optocoupler failure is the root cause of all this situation
where can i download the schematic diagram to these circuits?
Thank once again great video
Aslmuailkum Bhai
wa alaikum salaam dear sister
👌👌👌👍
best regards
Hello sir in this video did you replace Scr ????
currently i don't have SCR and 27V zeners, i will arrange these parts and will share in upcoming video. because it iis protection circuit. so power supply turned ON without this output protection circuit
Well troubleshouting
It would be good to explain your desoldering solution
please check this video number 511
th-cam.com/video/pjBx7F-H0SE/w-d-xo.html
Thank you
so nice of you
💯👍
best regards
It's great.
it is my pleasure
Where did you buy your de-soldering iron. If it's a DIY product can you make a video please.
Dear Sir ....What is best Bulb wattage for use series to power up MPCS to check....I mean 100w or 40W
FYI: I am use 100w for repair like this..
thanks brother
Thanx good
sir thank you for good videos sir i have question how to find smps weather it is 24 or 12 or 44v how to confirm it some times it shows 24v instead of 15v or 12v
Thanks for the video sir. Where do you get your datasheets?
What is the role of Scr in this circuit? thanks for great videos 🙏
it is protection circuit, over voltage and over current protection to protect battery from all possible damages
@@HaseebElectronics 🙏🙏
👍
best regards 💕
جزاک اللہ خیراً کثیرا۔ 28-01-23
Thanks a lot dear brother
Thanks
Nice sir🔉🔉📢📢💪💪💪
Wanna ask about your avo,brand is aneng right?what type?
Its support freq hz and duty % ?
it is Aneng Q1, yes it is good response in frequency and duty cycle
th-cam.com/video/HoOR26t45Zs/w-d-xo.html
@@HaseebElectronics thank you for reply,and may Alloh protect you..amiin
Your brother from indonesia
@@HaseebElectronics how if about compare vs aneng 620A?what do you prefer?
which soldering iron you are using to remove components from pcb, iron with desolder pump ? where it is available
i am using WELLER WR3M rework station. it is avaiable on amazon, indiamart. and many other online sellers
soldering iron is TC201 WELLER
Mr Haseeb. What is the model of the solder/desolder you are using? Thank you.
yes it is WELLER WR3M rework station
bit.ly/3ZGDjn1
👌👌👌👍👍👍🌹🌹🌹
I like that solder remover, where can I get one?
At video's 3.04 minutes, what was soldering or desoldering machine ?? was nice
share details of that desoldeing m/c
I have damaged smps I want to send to you to do a repair video. Has some burning!
okay if you want to send. you can send by courier. please send a message on my WhatsApp and I will give you the postal address and you can send
my WhatsApp is 00962791161084
Thank you Sir. What if the Zener diode is shorted and the part number is no longer visible, how do go about this? thank you
💞🙏💞
best regards
How do you find the burnt out components value or ic no. Please share
Sir how can we generate igbt gate drive pulses for 6igbt to run bldc compressor
And how can we arrange all components step by step to make a circuit of bldc compressor running
Sir i humble request you to reply my question please
Sir,that is a unique desoldering tool,where you got it?👍👌
thanks a lot
it is WELLER WR3M rework station
you can purchase online from Amazon
www.amazon.ca/Weller-WR3000M-Digital-Self-Contained-3-Function/dp/B0019V5PSQ
Salamun alaykum, I have tested a kettle resistor with 60w serias lamp, The lamp lighted but the resistor not heated. Without seies lamp i've tried it, andI saw resistor was working. What is the reason of that ?
the series lamp is 60 watt or 100 watt. and the kettle resistance is 1500-2000 watt. so lamp will glow full, because the lamp have more resistance than the kettle resistance.
if we see the voltage drop across the two resistors in series, then the kettle resistance is much low than the lamp resistance, in result the kettle resistance will not get more voltage to produce enough wattage
What was the root cause of this fault . Was it an optocoupler failure initially that then caused a fault in the output side which then caused a fault on the primary side ?
i think that its root cause is optocoupler, which caused to increase voltage at vcc pin of the IC, and it switched a long time, which gave high spikes strokes on output side, and it made damage in secondary side as well
Please explain SMPS battery charger circuit using L6599 ic.
Sir, from where you buy your desoldering tool..?
🙏🙏🙏👌👌❤❤
best regards
Wow❤❤
There were a lot of current slaps on the PCB.
Hello Mr Haseeb. What is the reason hearing "ticking noise" from smps? Thank you so much
possible reasons. its switching frequency is out of limit either low or high
separated core halves
@@HaseebElectronics Thank you master. Additionally In secondary side 1000 micro 50v cap become hot. I checked every thing around that but I don't find shorty. There are not output voltages to the main board. Filament of the test lamp is glowing on off on off... with tick tack sound in smps.
Can you provide desoldering pump link sir
Hi, how did you make this disoldering iron?
it is Weller wr3m rework station
How u creat the dissoldering(sucker) with soldering iron bro?
it is WELLER WR3M rework station