Dude, I'm a technician and this is about the only size circuit I would attempt to troubleshoot. Trying to troubleshoot more advanced circuit systems like phased array radar systems and circuitry with analog and digital circuitry on the same board can be stressful and frustrating. This is a great starter circuit to learn how to troubleshoot. BTW, the guy doing this video would make a great electronics teacher.
Ahhh... those broken radar things that must be fun, lol here he didn't troubleshoot much,just replaced parts until he got it; did not even look at the board to see if there was any obvious contamination; it is all another utube trick to get views, because he had smelled the leaked electrolite, he **knew** it might need moping up;
If you're paying attention to WHAT he's saying, you quickly stop noticing HOW he's saying it. Following his thought process is probably the best way of learning you will encounter anywhere. This guy is a pro.
I was looking for someone who will explain how electronic things work , but like explain it with basic concepts and hands on learning , not theoretical stuff, your channel is perfect, thank you
I have no idea how you look at a circuit board and read it like a book. I've tried to learn this for a while, people who can do what you do amaze me. Great video!
Same here, i am amazed by such people who can read circuits and explain their working based on their placements!! Becoming one may need lot of experience and first hand play, and a lot of designing skills too i suppose
Yeah the guy has an accent, but I bet 90% of those people making fun of him does not speak a foreign language, not even has the knowledge he does. So lets stop making fun and start learning ;) The content is VERY GOOD and he is speaking a very understandable english, I am not a native english speaker and I understand everything, in the end of the day that is what really matters. Come on, he could easily speak his native language and we would never understand it. Thanks for the good informative video.
I am German, and the only really weird thing about the accent is how he always slows down and emphasizes at the end of a sentence. But it's also calming, this way of speaking, so I like the videos. I do wonder what language this "sentence melody" comes from though. He seems Czech... does Czech always sound like that? Definitely interesting, I like it.
Let's be serious over things. What has his accent or language got to do with the knowledge. Learn from him or move on to other channels. Why are we humans so petty?
Before scrolling down to the comments, I also guessed lots of commenters would have fun with the voice. Its funny, but easy to hear anyway, because of good audio quality. But more important - this man is a electonics professional. He obvious knows alle the individual details and functions/principals of the switch-mode power supply circuits, so listen and learn... Pay special attention to the evaluation of the isolation band between the high voltage and low voltage section. Important safety.... Thanks to this DiodeGoneWild for using so much time on an $5 unit. You know your knowlegde.
It's pretty sad that the top three comments are about his accent instead of the product in this video. Yes he's got an Indian sounding slovak accent (if there's such a thing he-he), but it's all good, the guy's very knowledgeable and that's all that matters. He's made or cables and wires, with deep dark desires, so don't touch him! :D "That's niiiiiiiiiiice!" if you know what I mean ;)
@@morfisiuslizerro6400 Greetings, hypocrite! You do realize that you are saying racism spares white people, but then, in the same post, generalize all white people & call them stupid, right? That makes you racist. Against white people. So you've proven yourself wrong. Racism doesn't spare white people either. I do agree that racism is stupid, though. You demonstrate that quite well. But the more people continue to talk about it, the longer they keep it alive. If everyone could forget about it & simply hold individuals accountable for their own actions, then racism would be a thing of the past. As Gandhi said, "Be the change you wish to see in the world."
Language is not a knowlege just a medium to express the knowledge. So unskilled stupid make fun of a skilled man. Thanks man for so detailed knowledge with patience and experience. Rarely i find such good vidio
I think the 6Z2 chip is actually a dual common anode zener diode. As for the emitter of the switching transistor - it probably connects to the chip because the chip has an internal current sensing resistor or something like that, for overcurrent/overpower protection.
@Aneesh Asokan < The only thing that can top this is an Indian speaking with a Czech accent. tsk-tsk It's pretty sad that the top three comments are about his accent instead of the product in this video. Yes he's got an Indian sounding slovak accent (if there's such a thing), but it's all good, the guy's very knowledgeable and that's all that matters. "That's niiiiiiiiiiice!" if you know what I mean ;) Czech does sound a bit between Italian and Indian, here are a couple of videos: ua-cam.com/video/7dmPD0b_Ghw/v-deo.html ua-cam.com/video/5nKtEX6PmhA/v-deo.html
Great work Sir, and I wish I had a tutor like you in my early school and college days. You bet I would have become one of the best electronic engineers. Your intelligent analysis of the circuitry is highly commendable. I wonder if you could answer my other questions on electronic circuits such as Battery charger and UPS circuit. I would be grateful for a line in reply. Thanks and best wishes.
Thank you so much. Excellent analysis of circuits, i have seen the other videos too. I like your accent and style of explanation, as it is pleasant, easy to follow and understand. Thanks.
Thank you, Sir. Your information is helpful. And to all the non educated out there: Communication doesn't have accent. It's the quality of the message what really counts.
It's funny, I am an electrician and at work I consistently hear the el-engineers call the secondary the primary. What many people don't know is that you can save your electronics, as long as you don't let the smoke out! Nice channel sir
all those subscribers you must be doing something right. You are providing a great service to the public and the world by reviewing all these questionable products that may cause hundreds of fires and electrical accidents a year. Yor work on you tube may be saving lives.
Great video sir! Thank you for showing me how to open the damaged adapter without cutting my fingers!😂 My case of failure was different, the capacitors were fine, but two of the solders on the USB connector had cracked. I re-solder them and it works!
YES! you can smell electrolyte! I was taught by several mentors and my schooling to use your five senses.. touch, taste, listen, look, and smell. unfortunately my sense of smell has grown weak and cant smell electrolyte, my hearing has been damaged in the service so cant hear high piched unusual noises. But for the young electronics enthusiest, they are your best tools to test and repair, develope them!
I find myself randomly talking to myself out loud or in my head using your accent even when I’m in public. It’s not that I’m making fun of you per se… it’s just fun to talk like that and yes it is kind of comical so I guess I’m kind of poking fun. But I don’t mean to offend you, becauseI find your accent very endearing and calming to listen to. Especially when trying to sleep after a long day in the lab and my mind is racing with projects and business ideas. But it’s pretty hilarious when I catch folks looking at me strangely when talking to myself out loud and over exaggerating your wild accent out in public and not realizing it. 😂
5:35 The extra resistor to the negative rail means that it will be a voltage divider, it will give a fixed voltage to the "chip" if this is resistor was not there, it would mean it is only the current to the chip would be reduced, NOT the voltage (although, in practice, the voltage would probably be reduced a lot). This is the difference between a Rheostat, which has 2 connections and controls current and a Potentiometer which has 3 connections and controls voltage. Hope this helps mate :-)
At 5:03 he points out the L1 inductor, but does show on the schematic or talk about the component B1 which is on the negative side of the two 6.8uF capacitors. Would you happen to know what type of a device B1 is? I’ve searched all over and I can’t find any information on the reference designation for B. Thanks!
The control IC is definitely made by Diodes but the mark doesn't match any known device so it's either a custom chip for this supply or it's mismarked. That is fairly standard topology to have the sense resistor going into the controller and the transistor collector on another pin. The device on the output is definitely a minimum load to prevent the output from exceeding 5V.
Very good thank you. I have seen dozens of electronic products fail over the years from leaking electrolytic capacitors. and repaired most of them by replacing the capacitors with newer and if possible higher values, both voltage and capacitance if room allowed it.
Have a slightly different Samsung adaptive fast charge model for the 120V 60Hz market, quit on me after two years. Turned out it was a manufacturing defect, the PCB slides into two connectors to hook it up to mains power and one had failed by inadequate contact. Bent the connector so it grips more tightly and replaced the solder on the PCB connecting pad. Works now, got lucky with a super simple problem.
Hey guys, i just wanted to share a recent charger fault I experienced. Once upon a time my Lenovo charger just died out of nowhere. When I opened it I found that some of the traces leading to the USB were gone. And I don't mean melted or melted and shorted - just straight up GONE. Had to carefully create new traces to repair it. Good luck!
That winding is actually called secondary winding, it's jus that it is located on primary side of the board. It is only used to power up PMW circuit. It does not necessarily provides any control.
@@sthandiwe7825 the small winding is used to power the PWM, but it is also necessary to control the percentage of the PWM itself. with a fixed PWM, the system could not regulate the output voltage. bye
@@matteom2011 It only provides power to PMW circuit, normally it provides fixed 12vdc to pulse with modulation circuit but that also depends on the design. PMW circuit is for oscillation and control. The only circuits that provide control is the feedback and PMW circuit not the power from those windings.
The secondary capacitor us of the polymer solid electrolyte type. These do not suffer from drying out so are rarely the cause of any problems. Their main feature is extremely low ESR and ripple current handling capability for their size and voltage rating. The voltage rating is intentionally such crazy number, to make sure no purchaser without any technical knowledge would order a seemingly cheaper standard electrolytic for that place (you won't find a "7.5V" rating among standard electrolytics) The "7,5V" actually mean the same expected operating voltage as the "6.3V" of standard electrolytics is intended for, so for about 3..5.5V DC.
Well done on the 10000 subs :-D. Why dont they watch the videos, 10000 views per video would be awesome. Are the three 22meg resistors just supplying 1/3rd of the voltage to start the chip? perhaps.
It seems that only 10% of the subs really watch the videos. Maybe they have subbed to too many channels because the youtubers are desperately begging for subs those days :D. 1/3 of the voltage would be 110Vdc. The chip has to clamp it down to a much lower voltage anyway, so the 22M resistor at the bottom has no use. Maybe they had a big stock of 22M resistors with no use...
Now if you could just add some hints to your 10k users to go to your very interesting web site: danyk.cz/index_en.html, adverts could bring a few more pennies in :-D. Yes 22 meg is odd, i've seen 1meg and 2.2meg resistors used in the start up circuit of some switchmodes, perhaps they did over order lol.
I wonder if confirmation bias ever plays into his thinking. Meaning if we tried to get an ok quality Chinese charger, but pack it into a Samsung, Apple, Sony etc charger, would he analyse the charger and believing it to be from a good brand, start saying how it's good and well designed. That is quite interesting to wonder.
Sure, but also... in this particular case, >5mm electrical separation? That is insanely high. Definitely more than necessary - but it is a good thing to have more than necessary to save your life. BTW how dangerous is that electrolyte stuff when it fills that gap? What kind of current would it let through from primary to secondary? Is that actually another real danger, not just arcing, on chargers with lower separation?
The transistor and switch control chip works together by sharing the voltage load. That way you can get away with a switch controller meant for rectified 120V but still use it for rectified 230V. Because of voltage divider 22M+22M vs 22M... 2/3:rd of voltage load will land on transistor rather than switch controller (during 'off' part of sw.cycle). For this to work the transistor must be a mosfet or IGBT: there is not enough current to drive a NPN-base... I would not even think a darlington would work, but that's just a guess.
The input capacitors are made by CapXon. A capacitor company that makes their capacitors in china. CapXon is also notorious for their capacitors failing prematurely. Especially around the early 2000's, Capxon's newer capacitors are not that much better. They should have gone with a better brand for the input capacitors, Some really good brand they could have gone with are nippon chemi-con, nichicon, rubycon, panasonic and suncon. (most of these brands make there capacitors in japan.) REPLY
I was thinking to myself when editing this comment today 'Should i remove the part about the Chinese capacitors being "decent" ' I guess i should now because now I've seen more of them fail since i made that comment.
Ben Chavez - when you were editing, you should have fixed the repeated errors in the use of there, their and they're. There was a dead capacitor in this charger. They're all cheap Chinese capacitors inside there, and the brands are notorious for their low quality.
Thank you for your great video as usual, i have the same charger and i would like to make a variable output voltage using a potentiometer what is the component based on your diagram that i need to change to make that happen?
*Not trying to start a fight....but the Australian versions of the Samsung chargers have Nicicon or Rubycon capacitors. So I dunno wether thats a fake or your country gets cheaped out on.*
I'm trying to learn about electronic components and what they do and when to use them and why? I'm a complete beginner but your style of presentation is great.so I'll stay here anyway.but I do need to go to a more basic channel to learn about 101 electronic components and circuitry. Any recommendations?
the mystery diode (@5:11) that you do not know works as a current source, this tech dates back to the 741 op. amp.(see the internal circuitry for more you may notice that the 741 has 3 current mirrors (it is called))
Watching this because i want to bring some weed to my vacation and im planning ti hide it in an old broken charger Wish me luck hahaa Update: it worked hahaha
hi guys i have a problem: the input of the same USB charger as you is in my country 230V, but can i also put there an Input, negative and positiv cable of a 12V Batterie, on it? or doesn't it work bc of a diode?
Can I replace 6.8 uF capacitor with higher value, for instance 10 uF (400V) ? What does it do with volts and amps going to next part of the circuit (the DC high volts part with the transistor and mysterious chip)?
@DiodeGoneWild with regard to the chip on the secondary side, I opened my own Samsung charger and had a look. I found out it is an APR34330 which is as the company calls it a: SECONDARY SIDE SYNCHRONOUS RECTIFICATION SWITCHER. Not too sure but it looks like it is essentially a controller with integrated N mosfet that helps on reducing losses on the primary side and also smoths the output to maintain a nive fixed 5V. Datasheet: www.diodes.com/assets/Datasheets/APR34330.pdf
Wait .. wasnt Tesler from the chech republic? Didnt he talk like that? no one seemed to make fun of his accent, maybe cause he gave us all the marvelous things we take for granted
Forgive my ignorance but can someone explain me why there is a rectifier in the primary part instead of the secondary part only? I mean the rectified voltage is turned back to AC again through the npn transistor to be fed through the transformer anyway, so what's the point of rectifying it before?
Hi, is there any way to change the output voltage to, say, 9V? I have several old chargers and I'd like to use one as a 9V power supply for my component tester. Thanks.
you would have to rewind the last transformer and without stating the current you need, it would be difficult to help you you would have to design it by trial and error
Oh precisely I throw away mine yesterday !! 😥but I can't fix that anyway, need professional hand like yours ⚠. Thanks for sharing your knowledge great man.💌
Dude, I'm a technician and this is about the only size circuit I would attempt to troubleshoot. Trying to troubleshoot more advanced circuit systems like phased array radar systems and circuitry with analog and digital circuitry on the same board can be stressful and frustrating. This is a great starter circuit to learn how to troubleshoot. BTW, the guy doing this video would make a great electronics teacher.
Ahhh... those broken radar things that must be fun, lol
here he didn't troubleshoot much,just replaced parts until he got it; did not even look at the board to see if there was any obvious contamination; it is all another utube trick to get views, because he had smelled the leaked electrolite, he **knew** it might need moping up;
He is an electrical engineer
Certainly agree man
If you're paying attention to WHAT he's saying, you quickly stop noticing HOW he's saying it. Following his thought process is probably the best way of learning you will encounter anywhere. This guy is a pro.
I was looking for someone who will explain how electronic things work , but like explain it with basic concepts and hands on learning , not theoretical stuff, your channel is perfect, thank you
The moment when he said "SAMSOOUNG", my charger starts to repair itself
LMAO
😁😁
Hey you😮
He he he 😂
LLL
What do i know about electronic repairs? Nothing. But i watched the whole thing. I love your enthusiasm. Stay awesome!
I have no idea how you look at a circuit board and read it like a book. I've tried to learn this for a while, people who can do what you do amaze me. Great video!
Same here, i am amazed by such people who can read circuits and explain their working based on their placements!! Becoming one may need lot of experience and first hand play, and a lot of designing skills too i suppose
You take a circtuit and follow the trace. You draw it as you go along. My hint is to first of detect the power supply lines.
Never heard this accent before. Best ive heard so far. Subscribed 😎
👉ua-cam.com/video/V5F4-OpYg7k/v-deo.html👈
@Anirudh Kowshik ummm no
It's Czech I think
@@SidharthCAnilyea it is,
on description ;)
Yeah the guy has an accent, but I bet 90% of those people making fun of him does not speak a foreign language, not even has the knowledge he does. So lets stop making fun and start learning ;) The content is VERY GOOD and he is speaking a very understandable english, I am not a native english speaker and I understand everything, in the end of the day that is what really matters. Come on, he could easily speak his native language and we would never understand it. Thanks for the good informative video.
I am German, and the only really weird thing about the accent is how he always slows down and emphasizes at the end of a sentence.
But it's also calming, this way of speaking, so I like the videos. I do wonder what language this "sentence melody" comes from though. He seems Czech... does Czech always sound like that? Definitely interesting, I like it.
Let's be serious over things. What has his accent or language got to do with the knowledge.
Learn from him or move on to other channels. Why are we humans so petty?
Yes youre right
Before scrolling down to the comments, I also guessed lots of commenters would have fun with the voice. Its funny, but easy to hear anyway, because of good audio quality.
But more important - this man is a electonics professional.
He obvious knows alle the individual details and functions/principals of the switch-mode power supply circuits, so listen and learn...
Pay special attention to the evaluation of the isolation band between the high voltage and low voltage section. Important safety....
Thanks to this DiodeGoneWild for using so much time on an $5 unit. You know your knowlegde.
It's pretty sad that the top three comments are about his accent instead of the product in this video. Yes he's got an Indian sounding slovak accent (if there's such a thing he-he), but it's all good, the guy's very knowledgeable and that's all that matters. He's made or cables and wires, with deep dark desires, so don't touch him! :D "That's niiiiiiiiiiice!" if you know what I mean ;)
ehh he's ok.
He has a web page danyk cz
@@morfisiuslizerro6400 If i dont like his voice that wont make me a racist (or any other here), just to make it clear.
@@morfisiuslizerro6400 Greetings, hypocrite! You do realize that you are saying racism spares white people, but then, in the same post, generalize all white people & call them stupid, right? That makes you racist. Against white people. So you've proven yourself wrong. Racism doesn't spare white people either. I do agree that racism is stupid, though. You demonstrate that quite well. But the more people continue to talk about it, the longer they keep it alive. If everyone could forget about it & simply hold individuals accountable for their own actions, then racism would be a thing of the past. As Gandhi said, "Be the change you wish to see in the world."
That circuit diagram is the stuff of Engineers, this man knows this stuff. 😍
👉ua-cam.com/video/V5F4-OpYg7k/v-deo.html👈
Can't he be an engineer?
"This is going to be complicated... and maybe bloody" lmao
Ye the way he holds a knife isn’t great, I don’t think anyone should copy that. 😬
One the best electronic tutorials on YT.
This man is a PRO. Only a PRO can smell the problem so quickly.... and hit the spot!
Language is not a knowlege just a medium to express the knowledge. So unskilled stupid make fun of a skilled man. Thanks man for so detailed knowledge with patience and experience. Rarely i find such good vidio
I love your way of speaking english.Good job.
You are such a brilliant guy.
I don't know about electronics but in your explanation it's quite understandable.
I think the 6Z2 chip is actually a dual common anode zener diode.
As for the emitter of the switching transistor - it probably connects to the chip because the chip has an internal current sensing resistor or something like that, for overcurrent/overpower protection.
He is Czech who speaks English with Indian accent, nobody can that!
oh didn't know that...
but I always thought that the mains sockets seen in the beginning of the video are french?
It's not Indian accent, but Czech. It seems that you are not familiar with Indian accent. LOL!🙏😂😁😀
Can what? Haha lol
@@Aneesh.Asokan I am Czech and my colleagues are Indians. This is perfect.
@Aneesh Asokan < The only thing that can top this is an Indian speaking with a Czech accent. tsk-tsk
It's pretty sad that the top three comments are about his accent instead of the product in this video. Yes he's got an Indian sounding slovak accent (if there's such a thing), but it's all good, the guy's very knowledgeable and that's all that matters. "That's niiiiiiiiiiice!" if you know what I mean ;)
Czech does sound a bit between Italian and Indian, here are a couple of videos:
ua-cam.com/video/7dmPD0b_Ghw/v-deo.html
ua-cam.com/video/5nKtEX6PmhA/v-deo.html
I'm guessing that the 3rd 22 megaohm resistor is a bleed resistor for the primary side. Excellent work with the schematic.
Impressively complex PSU design - a real education watching these videos :)
Great job on 10,000. Yours is one of my favorite UA-cam channels. Can't wait till you hit 100,000.
Done.
Great work Sir, and I wish I had a tutor like you in my early school and college days. You bet I would have become one of the best electronic engineers. Your intelligent analysis of the circuitry is highly commendable. I wonder if you could answer my other questions on electronic circuits such as Battery charger and UPS circuit. I would be grateful for a line in reply. Thanks and best wishes.
I agree with you 😢😢😢😢😮
Thank you so much. Excellent analysis of circuits, i have seen the other videos too. I like your accent and style of explanation, as it is pleasant, easy to follow and understand. Thanks.
Thank you, Sir. Your information is helpful. And to all the non educated out there: Communication doesn't have accent.
It's the quality of the message what really counts.
It's funny, I am an electrician and at work I consistently hear the el-engineers call the secondary the primary.
What many people don't know is that you can save your electronics, as long as you don't let the smoke out!
Nice channel sir
huh?
all those subscribers you must be doing something right. You are providing a great service to the public and the world by reviewing all these questionable products that may cause hundreds of fires and electrical accidents a year. Yor work on you tube may be saving lives.
yes i totally agree this channel needs way more attention the videos are top notch if I'm being honest
It's like he is telling an exciting story to a lil kid 😂
😂😂😂😂😂😭😭😭
Ooo I want to cry 🤣🤣
But I like his way to speak
👉ua-cam.com/video/V5F4-OpYg7k/v-deo.html👈
1:49 “This is going to be complicated… and maybe bloody”! 😹
Great video sir! Thank you for showing me how to open the damaged adapter without cutting my fingers!😂 My case of failure was different, the capacitors were fine, but two of the solders on the USB connector had cracked. I re-solder them and it works!
His accent is a nice, subtle way to get more comments. And I started enjoying the accent closer to the end. It's somewhat close to singing.
YES! you can smell electrolyte! I was taught by several mentors and my schooling to use your five senses.. touch, taste, listen, look, and smell. unfortunately my sense of smell has grown weak and cant smell electrolyte, my hearing has been damaged in the service so cant hear high piched unusual noises. But for the young electronics enthusiest, they are your best tools to test and repair, develope them!
This is one of the best channels in the whole internet. It is just sad to see it got 3.9k dislikes on this video seeing it in 2019.
Amazing the way he sings all the phrases :))
This is better english than inglish man.
I know you r German.
I proud of you dear.
The matter is the knowledge of SMPS .
How did you deduce that he's german? 😏
It's not the language but how he rectify problem and fix it.He did well thks for sharing.
👉ua-cam.com/video/V5F4-OpYg7k/v-deo.html👈
I find myself randomly talking to myself out loud or in my head using your accent even when I’m in public. It’s not that I’m making fun of you per se… it’s just fun to talk like that and yes it is kind of comical so I guess I’m kind of poking fun.
But I don’t mean to offend you, becauseI find your accent very endearing and calming to listen to. Especially when trying to sleep after a long day in the lab and my mind is racing with projects and business ideas.
But it’s pretty hilarious when I catch folks looking at me strangely when talking to myself out loud and over exaggerating your wild accent out in public and not realizing it. 😂
5:35 The extra resistor to the negative rail means that it will be a voltage divider, it will give a fixed voltage to the "chip" if this is resistor was not there, it would mean it is only the current to the chip would be reduced, NOT the voltage (although, in practice, the voltage would probably be reduced a lot). This is the difference between a Rheostat, which has 2 connections and controls current and a Potentiometer which has 3 connections and controls voltage. Hope this helps mate :-)
At 5:03 he points out the L1 inductor, but does show on the schematic or talk about the component B1 which is on the negative side of the two 6.8uF capacitors. Would you happen to know what type of a device B1 is? I’ve searched all over and I can’t find any information on the reference designation for B. Thanks!
The control IC is definitely made by Diodes but the mark doesn't match any known device so it's either a custom chip for this supply or it's mismarked. That is fairly standard topology to have the sense resistor going into the controller and the transistor collector on another pin. The device on the output is definitely a minimum load to prevent the output from exceeding 5V.
As soon as i heard his accent I went straight to the comments section 🤣🤣
Same 😂
🫵🤣🫸
😂😂😂😂
Very good thank you. I have seen dozens of electronic products fail over the years from leaking electrolytic capacitors. and repaired most of them by replacing the capacitors with newer and if possible higher values, both voltage and capacitance if room allowed it.
Good job man. I have the 2A version of this charger and it looks more crowded but equally well built.
5V 2A and 9V 1.76A Fast charging I have this
Extensive knowledge in electronics is impressive.
Never replace an inrush fuseable-resistor with a regular resistor. Two totally different things!
of course
Have a slightly different Samsung adaptive fast charge model for the 120V 60Hz market, quit on me after two years. Turned out it was a manufacturing defect, the PCB slides into two connectors to hook it up to mains power and one had failed by inadequate contact. Bent the connector so it grips more tightly and replaced the solder on the PCB connecting pad. Works now, got lucky with a super simple problem.
I can't stop laughing. I feel happy listening this.
where to get the load, which you connected to the Keweisi-meter? that one with 2 big green resistors.
Thank you , Sensei. I just learned something. Please continue teaching.
This was obvious. Why you didn’t conclude earlier baffles me. Good job. 👍
Hey guys, i just wanted to share a recent charger fault I experienced. Once upon a time my Lenovo charger just died out of nowhere. When I opened it I found that some of the traces leading to the USB were gone. And I don't mean melted or melted and shorted - just straight up GONE. Had to carefully create new traces to repair it. Good luck!
Indeed your accent just forces to be attentive and never misses till the end .
the small winding on the primary, in addition to powering the driver, serves to indirectly control the output voltage.
But the output voltage is constant @ 5V?
That winding is actually called secondary winding, it's jus that it is located on primary side of the board. It is only used to power up PMW circuit. It does not necessarily provides any control.
@@sthandiwe7825
the small winding is used to power the PWM, but it is also necessary to control the percentage of the PWM itself. with a fixed PWM, the system could not regulate the output voltage. bye
@@matteom2011 It only provides power to PMW circuit, normally it provides fixed 12vdc to pulse with modulation circuit but that also depends on the design. PMW circuit is for oscillation and control. The only circuits that provide control is the feedback and PMW circuit not the power from those windings.
Brilliant man!! Honestly if you make fun of this guy,remember that you probably fall for every scam
when you listen to this english, you get crazy :D
AppleDone yep, so true it's very weird (btw I'm also half German)
Matthew Keeble I'm a German :D
Wiieerred check out Great Scott, he's German too 😊
Matthew Keeble woow, really? His English is very nice for Germans... Good to understand... :)
😂
The secondary capacitor us of the polymer solid electrolyte type. These do not suffer from drying out so are rarely the cause of any problems. Their main feature is extremely low ESR and ripple current handling capability for their size and voltage rating. The voltage rating is intentionally such crazy number, to make sure no purchaser without any technical knowledge would order a seemingly cheaper standard electrolytic for that place (you won't find a "7.5V" rating among standard electrolytics) The "7,5V" actually mean the same expected operating voltage as the "6.3V" of standard electrolytics is intended for, so for about 3..5.5V DC.
Impressive! who cares about the accent? the narrative was clear. Thanks.
finaly someone who didn't comment about his accent
That extension cord black because of all your experiments is very cool.
Well done on the 10000 subs :-D.
Why dont they watch the videos, 10000 views per video would be awesome.
Are the three 22meg resistors just supplying 1/3rd of the voltage to start the chip? perhaps.
It seems that only 10% of the subs really watch the videos. Maybe they have subbed to too many channels because the youtubers are desperately begging for subs those days :D.
1/3 of the voltage would be 110Vdc. The chip has to clamp it down to a much lower voltage anyway, so the 22M resistor at the bottom has no use. Maybe they had a big stock of 22M resistors with no use...
Now if you could just add some hints to your 10k users to go to your very interesting web site: danyk.cz/index_en.html, adverts could bring a few more pennies in :-D.
Yes 22 meg is odd, i've seen 1meg and 2.2meg resistors used in the start up circuit of some switchmodes, perhaps they did over order lol.
zx8401ztv my goodness there is some really cool stuff on his web thank you for pointing it out.
It is full of interesting things, some of the high voltage circuits are a bit dangerous, but use common sense and its all usefull :-D
DiodeGoneWild it's true your the only guy I haven't seen begging for subs good job sir
i will follow this channel forever, i like the way he talk way simple...
Question is: did someone learn anything from his lovely english accent? If yes then the message went through. That's what matters.
At least he tried..
I love your explanation with different accent.
I wonder if confirmation bias ever plays into his thinking. Meaning if we tried to get an ok quality Chinese charger, but pack it into a Samsung, Apple, Sony etc charger, would he analyse the charger and believing it to be from a good brand, start saying how it's good and well designed. That is quite interesting to wonder.
Sure, but also... in this particular case, >5mm electrical separation? That is insanely high. Definitely more than necessary - but it is a good thing to have more than necessary to save your life.
BTW how dangerous is that electrolyte stuff when it fills that gap? What kind of current would it let through from primary to secondary? Is that actually another real danger, not just arcing, on chargers with lower separation?
The transistor and switch control chip works together by sharing the voltage load. That way you can get away with a switch controller meant for rectified 120V but still use it for rectified 230V. Because of voltage divider 22M+22M vs 22M... 2/3:rd of voltage load will land on transistor rather than switch controller (during 'off' part of sw.cycle). For this to work the transistor must be a mosfet or IGBT: there is not enough current to drive a NPN-base... I would not even think a darlington would work, but that's just a guess.
The input capacitors are made by CapXon. A capacitor company that makes their capacitors in china. CapXon is also notorious for their capacitors failing prematurely. Especially around the early 2000's, Capxon's newer capacitors are not that much better.
They should have gone with a better brand for the input capacitors, Some really good brand they could have gone with are nippon chemi-con, nichicon, rubycon, panasonic and suncon. (most of these brands make there capacitors in japan.)
REPLY
No, teapo, jamicon, lelon, OST are still crap.
Good capacitors are Matsushita/Panasonic, Rubycon, Nippon Chemicon, Nichicon and Sanyo.
I was thinking to myself when editing this comment today 'Should i remove the part about the Chinese capacitors being "decent" ' I guess i should now because now I've seen more of them fail since i made that comment.
Because the power supply is designed to fail ... & Power supply manufacturers usually first "save money" on the capacitors
Ben Chavez - when you were editing, you should have fixed the repeated errors in the use of there, their and they're. There was a dead capacitor in this charger. They're all cheap Chinese capacitors inside there, and the brands are notorious for their low quality.
Sorry, i was tired. I will try to fix the typos.
"Let's a-try to pry this one open... It may be complicated. ...and may be bloody." 🤣🤣
😁😁😁😁😁
i prayed for your fingers while you was opening it🤣
Thank you for your great video as usual, i have the same charger and i would like to make a variable output voltage using a potentiometer what is the component based on your diagram that i need to change to make that happen?
U have your own style.. keep it
Entertaining voice :-) Superbly brilliant guy - Could watch his videos all day. Well done and thank you :-)
A decently designed charger ruined by cheap Chinese capacitors. Shame.
Exactly.
I would believe you, if you could prove that the charger was exceeding 85 degrees. Please show us how English should be "speeked".
*Not trying to start a fight....but the Australian versions of the Samsung chargers have Nicicon or Rubycon capacitors. So I dunno wether thats a fake or your country gets cheaped out on.*
Euro Bum Ooo nic
Murita muta murita sister
You actually need 2 pry tools to remove that back cover so you dont end up breaking it. Good video and yeah funny accent!
When I saw the bulging electrolytic capacitor, it was already the primary suspect.
Right
I'm trying to learn about electronic components and what they do and when to use them and why? I'm a complete beginner but your style of presentation is great.so I'll stay here anyway.but I do need to go to a more basic channel to learn about 101 electronic components and circuitry. Any recommendations?
Thanks, it was interesting to watch you troubleshoot.
👉ua-cam.com/video/V5F4-OpYg7k/v-deo.html👈
Your circuit repair experience is very rich, you can smell various components of burning odor.
yes that is an awesome talent
watching this video for uncountable times, and still interesting 😂
👉ua-cam.com/video/V5F4-OpYg7k/v-deo.html👈
the mystery diode (@5:11) that you do not know works as a current source, this tech dates back to the 741 op. amp.(see the internal circuitry for more you may notice that the 741 has 3 current mirrors (it is called))
great input thank you
Watching this because i want to bring some weed to my vacation and im planning ti hide it in an old broken charger
Wish me luck hahaa
Update: it worked hahaha
Big brain
Great video! I like you've drawn the electronic circuit. I always do that too and I don't understand how some technicians usually don't!
Hi, at 0318 when the capacitor facing screen, it shows sign of swollen top, it almost tells what is the problem.
hi guys i have a problem: the input of the same USB charger as you is in my country 230V, but can i also put there an Input, negative and positiv cable of a 12V Batterie, on it? or doesn't it work bc of a diode?
awesome work! ... and i like your dialect ( i am not a natve speaker)
Can I replace 6.8 uF capacitor with higher value, for instance 10 uF (400V) ? What does it do with volts and amps going to next part of the circuit (the DC high volts part with the transistor and mysterious chip)?
Diooooood not gooooooood
aby set Wiiiiiiiiiiiiiiiiird
Tomasz Dwornik Who are you ?
Mike Like A USB chaaaaaaaarger specjaliiiiiist.
Tomasz Dwornik Buehehh.
Tomasz Dwornik Ъъ
@DiodeGoneWild with regard to the chip on the secondary side, I opened my own Samsung charger and had a look. I found out it is an APR34330 which is as the company calls it a: SECONDARY SIDE SYNCHRONOUS RECTIFICATION SWITCHER. Not too sure but it looks like it is essentially a controller with integrated N mosfet that helps on reducing losses on the primary side and also smoths the output to maintain a nive fixed 5V.
Datasheet: www.diodes.com/assets/Datasheets/APR34330.pdf
the accent is just because he is from the chech republic and its normal to speak like that
Com média Look up a YTer called Deirones... maybe it's the same guy. :)
ضنرححيرودمى
Com média we are from CR
but we dont speak that stupid accent
Wait .. wasnt Tesler from the chech republic? Didnt he talk like that? no one seemed to make fun of his accent, maybe cause he gave us all the marvelous things we take for granted
Good video & an explanation of real world problems that happen in electronics, thanks.
I love your accent.... :D
Assalamu Alaikum unke chalati darkrai Baje Mahina apna WhatsApp number Ke Raja Raja apna mobile charger Chandigarh
I'll give you Like for your accent tone ! And the Steps to the solution.
Thank you very much for precious information!
Forgive my ignorance but can someone explain me why there is a rectifier in the primary part instead of the secondary part only? I mean the rectified voltage is turned back to AC again through the npn transistor to be fed through the transformer anyway, so what's the point of rectifying it before?
I really loveeeee this acentttt
I really hate iiiiiiiiit
Hi, is there any way to change the output voltage to, say, 9V? I have several old chargers and I'd like to use one as a 9V power supply for my component tester. Thanks.
you would have to rewind the last transformer and without stating the current you need, it would be difficult to help you
you would have to design it by trial and error
Your accent is weird but pleasant to hear. Thanks for your video.
The nose is apparently underrated as DiodeGoneWild would say-in diagnosing high temperature faults in electronics.
When you see it's a capxon...you just know xD
👉ua-cam.com/video/V5F4-OpYg7k/v-deo.html👈
Spreading some car petrol around seams can help open awkward casings. Thanks Mr Wild. Genius
electrolaaaaaaaaaaaait
NBL why would I want to subscribe to you?
Melon.
:))))
Lol
😂
Oh precisely I throw away mine yesterday !! 😥but I can't fix that anyway, need professional hand like yours ⚠. Thanks for sharing your knowledge great man.💌
"WheN i SmEeLl it."
*SNIFF SNIFF*
I smell it lmao
When I smell it
Sniff sniff
It can smell like electhro liath
I wounder if the 3 pin mystery chip is for current sensing in case some device tries to draw like 5 amps out of the USB charger.
could be but without chip ID we will never know