Mr Haseeb....your teaching method is ideal for us learners..you make it easy to understand a circuit...would I.. connect an oscilliscope to the same two points to see the waveform....ie transformer winding and mosfet drain and what would be the gate voltage..thank you
Hello Mr. Haseeb. I can read 167VDC to the area on the primary side by the partition from the input of 120VAC. But I have no reading on the secondary side from the legs of the coil to other side of the diode that you mention. So I am wondering if I have a bad transformer or maybe the 167VDC is not pulsating to transfer voltage to the secondary of the coil. My board looks 5 times bigger than the one you have here. Thanks in advance for any advice.
167VDC is okay, is it stable? did you checked VCC voltage on vcc capacitor connected to the VCC pin of smps ? is the mosfet is switching? i will suggest to check video number 528. i think it will be very useful
@@HaseebElectronics Appears quite stable totally. Well here is what I just ended up doing. I tested the switching transistor (K2370 N channel). I installed a 40k resistor to the collector and its other end to an open gate wire, leaving it out. And from the collector another 40K and then hook it up to the positive of a lithium ion 4V. Hooked up the negative of the battery to the emiter. A cap .1uF between the collector and the emiter. The capacitor charges when the gate is open, the instant I approached the gate with that open wire, voltage show drop. Voltmeter is connected to the collector and the emitter. When the wire moves away from the gate the cap charges and the cycle repeats. So I assume it means the switching transistor is working, implying pulse voltage to the primary of the coil. Unless this is wrong. I happen to follow this other guy's suggestion. So I don't know if it means anything. As I would think for the secondary of the transformer to get energized the primary has to get pulsating voltage. I don't get the total picture. I guess a voltmeter does not really show pulsation but root means value or whatever. But when the capacitor, charges/disharges, especially being gradual the meter in that case can show gradual rise and fall of voltage. If all this is correct then I assume I have a bad transformer and in my case two bad ones. I guess transformers can go bad before other things. I don't know. Okay from what I see, that K2370 switching mosfet;s collector feeds the primary side of a transformer which is way before the flyback or chopper transformer at the border. What feeds the primary of the two coils at the border is dc to dc converter Toshiba 2SK3114. There is two of them. One of it, the middle pin feeds one transformer but not the other transformer. And the second one is not feeding either because the ohm reading are pretty high. The one transformer that it is getting fed, there are two ceramic capacitors. I have tested their farad and it reads fine as specification. However when the board is plugged in I read no voltage across either one. The other transformer that no connection exist from either 2SK3114, there even on the secondary side there is some volt reading but not much across the capacitors. But I hardly read any voltage from its pins to the two (3pin diodes) but full continuity. With respect to the other transformer, there is voltage from the secondary to the middle pin of the barrier diode ( common leg of .25 volts). So I guess that part only seem to be okay.
Really we are learning a lot from you Morrocco. How can we mesure the frequency 10 or 50 or 100 khz in an ic where the Mosfet is integrated .the IC is CR6228T thank you.
@@HaseebElectronics Dear brother, if you have time, please enlighten us on how to use an oscilloscope. Also which oscilloscope do you recommend for an average technicians? Thank you
HELLO SIR, LIKE ALWAYS U ADD GREAT VALUE TO OUR KNOWLEDGE..SIR KINDLY MAKE A VIDEO ON CR6848 VS SG6848 AS I WANT TO REPLACE SG6848 WITH CR6848...PLS PONDER UPON POINTS THAT ARE AN ABSOLUTE NECESSITY WHILE REPLACING IT AND THE ADEQUATE ADJUSTMENT REQUIRED TO BE DONE.. REALLY LOOKING FORWARD FOR SUCH INTERESTING AND MEANINGFUL VIDEO...HOPE U MAKE ONE . MANY MANY THANKS AND BEST REGARDS SIR....
The frequency is being seen in mosfet had done by Ic, and is there any effect of mosfet on this frequency(teoricly it must not do that) and what is the last frequency during out.Thank you brother.
Hello, Sir I'm testing an outdoor a.c midair card Problem description: no output voltage Test carried out: Tny 286 drain-souce 315vdc: open mosfet Bp/m-S is 5.8 vdc: ok SN431 Ref-Anode : 2.5 vdc Photocoupler pc817 1-2 pins: 1.0 vdc Tx pri winding : 2.8ohm Sec winding 1: 1.3ohn Sec winding 2: 2ohm Sec winding across capacitor 14 vdc Sec winding across diode: not yet tested Conclusion: is the transformer faulty Thanks for your videos and knowledge From Ashvin, Mauritius island
From Nigeria, thank you Haseeb. I have a power supply i am having issues with presently. PWM IC TNY277PN is goes into thermal shut down after giving output for about two minutes. I have replaced the IC with TNY178PN but no output at all. kindly assist with solution
please check RCD snubber connected across the primary winding check bridge rectifier and main DC capacitor (capacitor must hold DC voltage= applied ac input x 1.414) check vcc diode and capacitor
@@HaseebElectronics thank you. I checked to see 352v DC on the DC capacitor before the primary winding. Also I measured 350vDc between source to drain on the TNY178pn ic. But I discovered the source to ENable pin is giving 1.2v DC instead of about 5v DC and also the optocoupler LED side(connected to voltage regulator)does not have any voltage. I will appreciate your help
i use fluke, it is my first day to test it. it have useful functions, i received new piece with frequency fault, it is measuring incorrect frequency. i am checking its quality so far
Hi sir,this video is nice. I have a crt tv with power led on but it won't turn on.i check output voltage of the smps transformer and they are b+98v,35v,5.5v and 8.9v instead of b+126v,35v,6.5v and 14v.can a bad diode cause the output voltage of smps transformer to be low.thanks for any response
Transformer k output per ager volt NAHI to diod may kesay 57 volt arahay hay , ager transformer ka voltage drop NAHI to output voltage to hona chaheyay, please is ka reason batay k transformer output voltage keyo hi show horaha
Sir I want to ask about zener diode, how can I determine the voltage value atx smps psu in hot side damaged zener diodes? I removed damaged zener diode, I want to replace with new one, I see on zener diode 18 number(Bottom), in other zener diode I see 48 number(Bottom), this number means 18 volt or 48 volt? how can I replace it with correct new one, Thank you
How to chek igbt and mosfet gate and source voltage in multimeter working condition in smps. Its chek dc or ac range in multimeter?? Why same smps no chek by multimeter switching igbt ,, sir guide please And give same tips
A. O. A sir kya hai apka sir main apka subscriber ho mai. Apki har video dkhta hi sir mjhu apki help ki zroorat hai main ek 12 volt 15 amp ki supply bnana chahta ho jis py 12 cooler wghera chal sky. Usky lye mjhy apki help ki zroorat hai. Mjhy apna what's no share kren thank you sir
![[379] Inverter AC Outdoor Unit Board / Micro-Computer, Memory, UL2003, Sensors/ IPM Drive](http://i.ytimg.com/vi/E99VfeJCT_Y/mqdefault.jpg)
![[379] Inverter AC Outdoor Unit Board / Micro-Computer, Memory, UL2003, Sensors/ IPM Drive](/img/tr.png)
Is plateform par shayad hi koi aisa channel ho jo itne easy way me sikka skta ho...Aap wakai me kafi intelligent hai ....
thanks bhai Ji. aap mera urdu channel (haseeb electronics urdu) bhi check karna bhai, wahaan meri saari videos urdu language mein hein
Assalamu Alaikum,, bhai jaan aap ka video dekh kar mera dil khush ho jata hai,,bahut bahut Shukriya aapka . 😇😇
best regards
Thank you for explaining how the secondary works on a smps transformer. Very well done.
MASHA ALLAH very interesting and informative, liked it, stay blessed, KAUP STUDIO
Good luck sir 🎉
Excellent sahring well explained you are a great teacher Sir .
Take care 🇬🇧💕💝 5.27
وعليكم السلام ورحمة الله وبركاته
شكرا لك أخي
thanks a lot dear brother
Hi friend lovely sharing as always. Dropped off the huge like.👍🏻 See you around
Nice sharing🌷
Super vlogs 🌷
Keep it up🌷
Stay connected🌷
Good luck 👌🏻🌷🇮🇹
Aslam u alaikum
Thanks for sharing with us
Very informative
Lots of love from USA 🇺🇸
Nice sharing full watch 👌
Thank you so much 🙂
I really like you and your video
You really kill the gap between theory and practical
best regards
if we compare there isno gap between theory and practical. but sometimes there are some limitations cause to create a little difference
Lk 34 good job brother
Fully watched 👍👍👍
Wonderful video dear friend, have a happy new week!!!
Excellent Capt I like electronic technology
Nice job 👌 dear brother 👍 Stay blessed 🙌
Sixteen mashallah excellent informative vedio good job superb working best wishes
Very interesting. Thanks Haseeb.
My pleasure
best regards
Mr Haseeb....your teaching method is ideal for us learners..you make it easy to understand a circuit...would I.. connect an oscilliscope to the same two points to see the waveform....ie transformer winding and mosfet drain and what would be the gate voltage..thank you
Beautiful explain. Thank you sir.
You are most welcome
Nice sir thanks 👍
Hello Mr. Haseeb.
I can read 167VDC to the area on the primary side by the partition from the input of 120VAC.
But I have no reading on the secondary side from the legs of the coil to other side of the diode that you mention.
So I am wondering if I have a bad transformer or maybe the 167VDC is not pulsating to transfer voltage to the secondary of the coil.
My board looks 5 times bigger than the one you have here.
Thanks in advance for any advice.
167VDC is okay, is it stable?
did you checked VCC voltage on vcc capacitor connected to the VCC pin of smps ?
is the mosfet is switching?
i will suggest to check video number 528. i think it will be very useful
@@HaseebElectronics Appears quite stable totally.
Well here is what I just ended up doing. I tested the switching transistor (K2370 N channel). I installed a 40k resistor to the collector and its other end to an open gate wire, leaving it out. And from the collector another 40K and then hook it up to the positive of a lithium ion 4V. Hooked up the negative of the battery to the emiter. A cap .1uF between the collector and the emiter.
The capacitor charges when the gate is open, the instant I approached the gate with that open wire, voltage show drop. Voltmeter is connected to the collector and the emitter. When the wire moves away from the gate the cap charges and the cycle repeats.
So I assume it means the switching transistor is working, implying pulse voltage to the primary of the coil.
Unless this is wrong.
I happen to follow this other guy's suggestion.
So I don't know if it means anything.
As I would think for the secondary of the transformer to get energized the primary has to get pulsating voltage.
I don't get the total picture.
I guess a voltmeter does not really show pulsation but root means value or whatever.
But when the capacitor, charges/disharges, especially being gradual the meter in that case can show gradual rise and fall of voltage.
If all this is correct then I assume I have a bad transformer and in my case two bad ones.
I guess transformers can go bad before other things.
I don't know.
Okay from what I see, that K2370 switching mosfet;s collector feeds the primary side of a transformer which is way before the flyback or chopper transformer at the border.
What feeds the primary of the two coils at the border is dc to dc converter Toshiba 2SK3114.
There is two of them. One of it, the middle pin feeds one transformer but not the other transformer. And the second one is not feeding either because the ohm reading are pretty high.
The one transformer that it is getting fed, there are two ceramic capacitors. I have tested their farad and it reads fine as specification. However when the board is plugged in I read no voltage across either one.
The other transformer that no connection exist from either 2SK3114, there even on the secondary side there is some volt reading but not much across the capacitors. But I hardly read any voltage from its pins to the two (3pin diodes) but full continuity.
With respect to the other transformer, there is voltage from the secondary to the middle pin of the barrier diode ( common leg of .25 volts). So I guess that part only seem to be okay.
Awesome sir👏,its informative, thanks.
excelent analysis.thenks
Thanks and welcome
Like 19 walkum aslam nice work great vedio
superb explanation
Thank you so much 🙂
👍
Thank you very much brother for this educative video..
best regards and special thanks
Thank for info my frend
. Again a very nice informative sharing brother. But this is small sharing comparing last one but great as always
Nice sharing
Really we are learning a lot from you Morrocco. How can we mesure the frequency 10 or 50 or 100 khz in an ic where the Mosfet is integrated .the IC is CR6228T thank you.
Shukriya Maestro
best regards
Very good and useful information Sir Thanks for sharing this knowledge to us
MashAllah bhai
Dear, may you create more explaination to check bias winding it is work or not, same like you did for secondary tx
amazing,averaging high frequency by multimeter is hard,oscilloscope is a perfect device it seems.
you are right dear, but every technician doesn't have approach to oscilloscope,
i also use oscilloscope for most of my work
@@HaseebElectronics Dear brother, if you have time, please enlighten us on how to use an oscilloscope.
Also which oscilloscope do you recommend for an average technicians?
Thank you
HELLO SIR, LIKE ALWAYS U ADD GREAT VALUE TO OUR KNOWLEDGE..SIR KINDLY MAKE A VIDEO ON CR6848 VS SG6848 AS I WANT TO REPLACE SG6848 WITH CR6848...PLS PONDER UPON POINTS THAT ARE AN ABSOLUTE NECESSITY WHILE REPLACING IT AND THE ADEQUATE ADJUSTMENT REQUIRED TO BE DONE..
REALLY LOOKING FORWARD FOR SUCH INTERESTING AND MEANINGFUL VIDEO...HOPE U MAKE ONE .
MANY MANY THANKS AND BEST REGARDS SIR....
MR. i appriciate all the videos and thank you. i have question on troubleshooting SMPS that Points we must check with multimeter
Thank you so much. Salam Aleikum
Wa Alaikum salaam brother. stay blessed
Thanks for sharing good job
Very nice
Mashaalla a good leson
Thank you so much
You're most welcome
The frequency is being seen in mosfet had done by Ic, and is there any effect of mosfet on this frequency(teoricly it must not do that) and what is the last frequency during out.Thank you brother.
Hi Mr. Haseeb do I need a load to test a smps?
yes
for perfect functional testing we need load
Nice video
it is my pleasure
Can I check AC voltage of the transformer using VFC enabled multimeter?
🌟🌟🌟🌟🌟 🗝🚪 true
Its great.
Wow beautiful dear
Thanku sir
Hello, Sir
I'm testing an outdoor a.c midair card
Problem description: no output voltage
Test carried out:
Tny 286 drain-souce 315vdc: open mosfet
Bp/m-S is 5.8 vdc: ok
SN431 Ref-Anode : 2.5 vdc
Photocoupler pc817 1-2 pins: 1.0 vdc
Tx pri winding : 2.8ohm
Sec winding 1: 1.3ohn
Sec winding 2: 2ohm
Sec winding across capacitor 14 vdc
Sec winding across diode: not yet tested
Conclusion: is the transformer faulty
Thanks for your videos and knowledge
From Ashvin, Mauritius island
thank you
You're welcome
From Nigeria, thank you Haseeb. I have a power supply i am having issues with presently. PWM IC TNY277PN is goes into thermal shut down after giving output for about two minutes. I have replaced the IC with TNY178PN but no output at all. kindly assist with solution
please check RCD snubber connected across the primary winding
check bridge rectifier and main DC capacitor (capacitor must hold DC voltage= applied ac input x 1.414)
check vcc diode and capacitor
@@HaseebElectronics thank you. I checked to see 352v DC on the DC capacitor before the primary winding. Also I measured 350vDc between source to drain on the TNY178pn ic. But I discovered the source to ENable pin is giving 1.2v DC instead of about 5v DC and also the optocoupler LED side(connected to voltage regulator)does not have any voltage. I will appreciate your help
Q1 meter is the best meter so far...i have change this meter from 5minit to 15minit auto off time
i use fluke, it is my first day to test it. it have useful functions, i received new piece with frequency fault, it is measuring incorrect frequency.
i am checking its quality so far
ya fluke is the best meter 100% accuracy....i have fluke model 179 bought 2007 until now still working well
Hello there. How can we detect the failure of programmed chips.
to be honest i did not understand the idea in this video :(
still i will give you the like because of you hard work brother
sir how to check the pwm to primary of chopper transformer thank you
Hi sir,this video is nice. I have a crt tv with power led on but it won't turn on.i check output voltage of the smps transformer and they are b+98v,35v,5.5v and 8.9v instead of b+126v,35v,6.5v and 14v.can a bad diode cause the output voltage of smps transformer to be low.thanks for any response
Sir please show us how to locate resistor sensor
Transformer k output per ager volt NAHI to diod may kesay 57 volt arahay hay , ager transformer ka voltage drop NAHI to output voltage to hona chaheyay, please is ka reason batay k transformer output voltage keyo hi show horaha
NCE4688 ka equlent I.c bataye sir
GSS4575
NCE603S
Double channel mosfet n channel p channel hi is pe chal jaega ic 8pin
@@abdulkalam-yx2vh please check video number 382
Shukriya sir
Great
Hello sir
My SMPS power supply connect with load power supply drop the voltage what's problem I hope you answer me.
Sir I want to ask about zener diode, how can I determine the voltage value atx smps psu in hot side damaged zener diodes? I removed damaged zener diode, I want to replace with new one, I see on zener diode 18 number(Bottom), in other zener diode I see 48 number(Bottom), this number means 18 volt or 48 volt? how can I replace it with correct new one,
Thank you
can you please send its picture to whatsapp 00962-79-1161 084
How to chek igbt and mosfet gate and source voltage in multimeter working condition in smps. Its chek dc or ac range in multimeter??
Why same smps no chek by multimeter switching igbt ,, sir guide please
And give same tips
good
thanks a lot dear
Sir can you please share the schematics diagram
seem easy, but once i face it, im feel afraid with explosion of high volt.
yes. it becomes dangerous, specially when we don't care
Sir is vidio ko hindi language me bhi banaye
If you have an oscilloscope with 100 MHz bandwidth, you can test
A. O. A sir kya hai apka sir main apka subscriber ho mai. Apki har video dkhta hi sir mjhu apki help ki zroorat hai main ek 12 volt 15 amp ki supply bnana chahta ho jis py 12 cooler wghera chal sky. Usky lye mjhy apki help ki zroorat hai. Mjhy apna what's no share kren thank you sir
Hard to follow you.
I am really sorry for that.
Very well explained! Thanks 👍
You're welcome!
👍