Sorin is the multimeter king. I'm beginning to believe that the Creator the inventor the founder of the multimeter can't even use it as good as my man Sorin. I learn something new every time I watch him do what he does best solve problems totally through electricity basically the man's a genius
Flashing timer on those Pioneer micro-systems means it is activated short circuit protection or some power rail is missing. Pioneer say that they have code for every type of flashing combination.After repair,flashing timer on some models keeps flashing and it is just needed to reset the unit with combination of buttons. Power + play/stop or Input + >> but that combination is maybe not possible on this particular model.
My method: On the DMM diode scale, check forward and reverse probe polarity the diodes, and the switching MOSFET, and it looks like the MOSFET switching transistor is shorted, and the fuse blew. Replace the MOSFET, diode(s) if bad, the PWM Controller chip, and the fuse! Then the whole unit should work! No more wires and substitution of power supplies!
proper electronics...understanding of circuit...it reminds me of a music amp i bought...100 pounds below value as i needed to buy and put 2 chips in it...it was not fully assembled by accident..... my sister boyfriend took my amp while i was away and went round town telling everyone how he fixed an amp due to his electronics skills...and he kept my amp.... i only found out when my old amp blew up and i went to collect my brand new amp that needed the 2 chips and it was gone...i was livid.
Nice job Sorin This video will be a reference to all persons who fixes electronics And that magic chip will help us in modifying all kinds of power supplies
This is practical thinking outside the box, more people need to get out of the box & have a look around, you don`t need gloves to give it a go, Thanks Sorin, one of your best yet, we could see your brain ticking to come up with a solution & you didn`t disappoint, this is old school electronics in a modern world :)
I have looked on some of your videos, And I really like them, you really do repairs, and I like the simple ways you do it. I just do repair for myself, and always go on the opposite side. 1. That circuit (the relay) it was made to switch off the transformer from ecological point of view, low power consumption, the transformer and circuits that power it (sorry if I am wrong I have not look to the entire movie) 2. A repairman can't be smarter than a good engineer, so the repair should be done to the initial design specs, otherwise is not an improvement it is an improvisation. 3. Improvement is done to compensate cheap manufacturing, where from the engineering it was design to low quality material (par example low quality caps or inferior capacity) and simpler design with shortcuts (like missing voltage stabilizers). For this device and Pioneer in general is not the case, as is not Chinese and neither on the cheap side. Both we are from the same country, so I understand the way you work and I appreciate showing you your way how things are done. I also have a DVD player with similar PWM chip blown (TNY267 if I remember correctly), but I will go the right route, order same chip, and make an improvement add a power button so DVD will not be powered at al if not used. This is the issue with all devices plugged and run in standby, if chip inside is not designed for a lifetime, thy high voltage and continuous pwm will short it.
dodgy is not a word i would use ..the word i would use is innovative... that describes what you do with ypur knowledge of how things work and a method to keep things working.. i think the owner is happy to have it back working rather than the power saving feature the manufacturer put in as a selling point..good work Sorin...
excellent substitute......but one thing what did you do to get the device turn on in the last....your small power supply 3.3v was not working earlier....but what happened that it suddenly started to work??
Nu pot sa cred ca ma uit de cateva zile fara oprire la video-urile tale si nu mi’am pus intrebarea daca nu esti cumva roman!!! Foarte tare ! Tine’o tot asa... putini electronisti mai sunt in ziua de azi...
I don't think there's any issue how you fix it, as long as it's made aware in some way. Or the price represents the job. Customers won't understand anyway so like I said ? As long as it's sorted out in some way that everyone can understand... I can't see a problem👌 Great work as usual
Of course it is easier to change the chip, condenser and diode,fast and simple measurement of several elements but then we did not learn anything - right? Great and helpful clip - thanks
Hi . Please could you help me i have a laptop didn't shutdown. When I shutdown it the screen sleep but light of power and every thing still on until i press the button to shut it down any solution please??????
How comes you can solder a live wire without shorting it? Isnt the tip of the soldering iron connected to the earth ground? If you touch a live wire, it should short the powersupply, not?
Thank you for another great video! I like messing with stuff. I love to least least try to fix broken things I have at home haha (or improve them, which sometimes I like more!). And you teach us how to fix them (provided we have some knowledge about this stuff). So thank you so much!!! I'm learning very cool stuff here... I'll stick with the channel 😄. See if I have time to watch some lives (not sure, but would be interesting). A thing though. When the small power supply wasn't working, maybe you could have checked the current? The voltage could be the same, but it could have dropped the current, maybe? Or that doesn't usually happen? (Or it can't happen at all because of the power supply or something?)
I hope not he's a cowboy hobbyist I hope you don't learn a thing from him ,if you want to be in the electronics field then study and learn don't follow this guy
I like your style, what you said its completely true, maybe 80% of the world its in poverty and its very difficult sometimes get spare parts from ebay, etc. I am in argentina, and i can order on ebay or china, but takes months and a lot of papers to get the stuff here, so for the client is not fast if i work in that way. So i am doing like you, taking spare parts from where i can, i think is good becase we recycle and is good for the environment. My channel is on spanish feel free to take a look if you want to do it, saludos!
I"m so glad that Sorin is so entertaining and fun to watch because i don't understand a damn thing he was doing! HEHEH. Until he finishes his beginner electronics classes, i'm not aware of all these different procedures he performs. Great video otherwise.
He show how he is repairing electronics, not training others, you have understand what is he doing if you have already repaired 1,2 .. switched mode power supplies and understand how they work.
Sorin, great video as usual.. i bought same mini switching power supply to repair laptop power rail, but it did not work. Do you think it could be because the original driver could not give PGOOD signal?
is it best to simulate PGOOD signal using 3VALW? I tried using 3VLDO and it didnt work it. I am trying to replace 5V power rail. @@electronicsrepairschool
Thank you for the experience , Mr.Sorin :-) You´re very good teacher! Never give up! :-) Can you anytime make a video about different soldering wires ? Whats the difference? What are you using?
Hi Sorin, I really enjoy and learn from your videos. Do you think the problem could be solved if the diode was identified earlier and you replaced the diode and the fuse? I am wondering if the part you connected 30V to the supply and saw smoke from the chip , that was the point the IC burned, earlier it should have been working since the short on the supply burned the fuse.
gat1994 hi, no, not the shorted diode burned the fuse, the shorted hv chip burned the fuse! The chip was shorted from the beginnings, thats why i came with 30v on a 300v power rail and the chip was smoking.
Hello, first of all good videos thanks. I have a frameless TV monitor so not very old (2-3 years) a friend left velux open and rain went into base stand where power button and severall other buttons (no essential for TV usage). on a pcb strip connected to monitor via a micro ribbon (5 lines/connections) All I want to do is to get it to turn on. Its been sitting here for a couple years now. Thinking this might be a way of introducing another button. Is there a way I can make a connection to turn on the TV to see if its working? I know these questins are almost imposible to answer specifically. Just jump the TV somehow?
i have never in my life binge watched a RUclips channel , But this one YES great Videos you remind me of me working on stuff. use your brain and anything goes even if it means redesigning the circuits to get it done great job . might want to try a filter cap on your output on that small supply
Yes what you did speaks volumes for the elections repair . In poorer counties access to parts is hard or next to impossible to obtain . It’s not a dirty repair to me , it’s using your knowledge and skill to repair something that would have been dumped a long time ago . 👍🏾👍🏾👍🏾😎🔥🔥🔥🔥
Lunea nici iarba nu creşte........tocmai am realizat că sunteţi rommân şi nu unul oarecare,vă mulţumesc că ne împărtăşiţi din vasta dumneavoastra experienţă,BRAVO !!!!
Those small dc-dc step up board are janky . They sometimes overshoot the voltage (to max boost voltage) when you touch them and of course you fry sensitive logic voltage level circut. They have their place for non sensitive low priority stuff but not sensitive stuff...
My conclusion at the end is that green wire has an intermittent break. If you follow through your connections and voltage apply points you will know why it just starts working. If you move that green wire around a lot my guess is timer error will come again.
For me it is not doggy job. I like your idea and i admire you work. The only thing which is not good for me is that you left there burned ic/chip and also you didn't took out all diodes so they are working now in blocking mode -because voltages are coming from other side. If they will fail (because of this) one day, then all voltages will go to transformer on secondary side first - i don't know what then will happen. And also if you've puted 12volts on 3.3v power rail (by accident) then because of this you should (this time you really should) connect any speaker or even headphones to check everything - if amplifier is working - if there is any sound or good sound without distortion. Because even if that 12volts didn't destroyed anything, then one question appears: Are you 100% sure about that short to ground on 12v rail (which you discovered) was there only because natural diode death, or maybe something was died on the logic board before, and then after the diode died. If your chip can stay there burned and it doesn't make any issues now, so maybe the same situation can be on logic board? - something can be bad (burned) there now, but it doesn't make any shorts now anymore. That kind of idea should be enough to force you to check whole unit more that only "power on/off, screen light, cd out/in/spin". I admire your work and ideas. I like them, but sometimes I don't understand how quickly (without full testing) you make a conclusion that everything is working. (that kind of testing will take only 2-3minutes more) You've said good thing, that"fault was only on that separated power supply so the logic board should be fine." -which normally is true, but not quite here (because that diode could die because of something on logic board, and second thing because you put 12v on 3.3v power rail. That two reasons makes that quote less sense). Thank you for video.
'You've said good thing, that"fault was only on that separated power supply so the logic board should be fine." -which normally is true, but not quite here (because that diode could die because of something on logic board, and second thing because you put 12v on 3.3v power rail. That two reasons makes that quote less sense). Thank you for video.' Ok, :))) Well, i come from vcr age, so logical speaking that 15 v power rail its used only by mechanics (dvd drivers+motors), they have to keep electric motors on a separate power rail because of noises made by brushed motors, and i knew its no short there after i checked with my lab power supply. About the 3.3v power rail, ignore the fact i used 12v, you can use 220v on a 3.3v power rail, its all about the current limit, on my current limit voltage dropped to 4.4v, most likely there its a zener diode for protection
@Electronics repair school Thank you for answer. Great explanation about 12v rail. Normally if you push play button it should automatically switch to CD mode and start to read music. You've pressed eject button and cd goes out. If for eject you do not need to switch to cd mode, then for the play button should be the same - and it should automatically switch to cd after you push trace back / put cd in. So that was strange and that is why I though that maybe something on the board is bad now, which was using 12v as well. And about 12v on 3.3v... everything is because we don't see voltage anymore - only the amps. I know that it requires two cameras (one on left and on right) but that is why when I've heard your words that you set 12v on power supply, and then after you touch capacitor I saw 2,65ampers on the screen here 20:33, then i though that board gets 12V at 2,65ampers. You didn't say that voltage drops below 4.4V. So please understand me :-)
Hello, I ‘m following your repair for a few months ago, you are really doing a good job. Recently I have problem on my Dell Inspiron 3521 laptop. The battery stop charging. It is appear (plugged in, not charging), the battery life is 65%, I tried many issue (remove and update battery driver, I tested other AC adapter, etc...). When I enter my laptop bios setup, I checked that the laptop did not recognize the AC adapter, it displayed (Unknowing) instead of (65w). Please how I can fix this problem and thank you in advance.
are you using a genuine charger? i think you are using a generic one and this one does not have the middle pin wich is used by the motherboard to identify the charger. or you are using a genuine one but somehow you dont have the corect voltage on that middle pin. the laptop will power up but it wont charge the battery. the message will be "plugged in, not charging".
@@breakthru3000 thank you for your answer, I'm using a genuine charger, I have tested many other charger with higher power (130w), but i get the same problem
If you really use the original charger for the DELL 3521 notebook. It is not only about the right power (65 watts or higher), its also about the right power sensing (e.g. middle pin). If the charger is the right one, then the problem might be in the notebook itself. In that case, you have to open it and measure it out. The easiest case would be a broken middle pin connection in the charger port or not far from it. Worst case would be Super I/O chip is not responding to correct middle pin signal. Only my 2 pence.
Sorin, Somehow i think you will be buying more of those higher powered buck/boost modules :-D. It is naughty, i'm not a green learner, But "You have to do, what you have to do". That p.w.m chip is an oddball, "Unobtainium" lol.
It was too longue video but learning too much, you could solder output buck converter from the first to second easlly to limit using much wiers, what you did is great idea for quick fix for someone who need device soon, else it take power cunsumption, also to protect transformer that could fail with 24h power on it, also the manifucture use old posersupply methode for limiting noise on powet amplifier to get better audio output Thanks for all your videos I need dump for bios asus rog strix hero II gl504gm
Have you got any ebay link to this switching power supply you're using. Can only find large ones No worries, found it when u went on ebay in the video 😂
Isn't fixed until you test the power amplifier at full volume. The broken PSU is not a tiny one. It's probably built for near 100W. You replaced it with modules under 15W. What if the 22V rail feeds the 2x50W output amplifier? It will burn.
OK then, that's good. I screamed at you while watching for your dodgy ground lead, both when using your power supply and with the meter. Terrible. Make some croc clip leads. And soldering while the power is on. Just no.
Sorin Man that’s awesome 👏 very hard one. How’s possibly you now what to do to make it work it’s amazing 😉 its not too long it’s going and coming to the working solution at the end. Thank you 🙏
Bravo Mr Sorin you over come on it again ! You deserve to work with manufacturs in conception of they devices
Sorin is the multimeter king. I'm beginning to believe that the Creator the inventor the founder of the multimeter can't even use it as good as my man Sorin. I learn something new every time I watch him do what he does best solve problems totally through electricity basically the man's a genius
Wow. I see what you mean.
This is absolutly not for a beginner. Respect. Thank you for sharing.
Flashing timer on those Pioneer micro-systems means it is activated short circuit protection or some power rail is missing. Pioneer say that they have code for every type of flashing combination.After repair,flashing timer on some models keeps flashing and it is just needed to reset the unit with combination of buttons. Power + play/stop or Input + >> but that combination is maybe not possible on this particular model.
love the fact you still strip wires with your teeth, great work once again, its a delight to watch your way of thinking through problems
My method: On the DMM diode scale, check forward and reverse probe polarity the diodes, and the switching MOSFET, and it looks like the MOSFET switching transistor is shorted, and the fuse blew. Replace the MOSFET, diode(s) if bad, the PWM Controller chip, and the fuse! Then the whole unit should work! No more wires and substitution of power supplies!
Its a lott of people that think this is dodgy. But if it has to work to day i think this is the only way. I have learned so much from you.
Good to see you back again Sorin , been missing your ingenious adaptability and broad knowledge based teachings 👌
proper electronics...understanding of circuit...it reminds me of a music amp i bought...100 pounds below value as i needed to buy and put 2 chips in it...it was not fully assembled by accident.....
my sister boyfriend took my amp while i was away and went round town telling everyone how he fixed an amp due to his electronics skills...and he kept my amp....
i only found out when my old amp blew up and i went to collect my brand new amp that needed the 2 chips and it was gone...i was livid.
Nice vide Sorin. I really love your approach: keep simple, keep cheap, keep your brain!
And that's how you find the defective part in seconds...Light it up!!! Thanks for keeping it real Sorin!
Even with your new power supply's with using the mains one wouldn't it need that fuse and relay. Fantastic shows Sorin......
Nice job Sorin
This video will be a reference to all persons who fixes electronics
And that magic chip will help us in modifying all kinds of power supplies
This is practical thinking outside the box, more people need to get out of the box & have a look around, you don`t need gloves to give it a go,
Thanks Sorin, one of your best yet, we could see your brain ticking to come up with a solution & you didn`t disappoint, this is old school electronics in a modern world :)
Ce roman de valoare,imi place cum lucrezi tine-o tot asa ,succes
Thank you for sharing your knowledge Sorin. Very interesting and educational video. You're a legend!
Svaka cast majstore..od Vas se ima dosta nauciti..hvala za ove video edukacije
I have looked on some of your videos, And I really like them, you really do repairs, and I like the simple ways you do it. I just do repair for myself, and always go on the opposite side.
1. That circuit (the relay) it was made to switch off the transformer from ecological point of view, low power consumption, the transformer and circuits that power it (sorry if I am wrong I have not look to the entire movie)
2. A repairman can't be smarter than a good engineer, so the repair should be done to the initial design specs, otherwise is not an improvement it is an improvisation.
3. Improvement is done to compensate cheap manufacturing, where from the engineering it was design to low quality material (par example low quality caps or inferior capacity) and simpler design with shortcuts (like missing voltage stabilizers). For this device and Pioneer in general is not the case, as is not Chinese and neither on the cheap side.
Both we are from the same country, so I understand the way you work and I appreciate showing you your way how things are done.
I also have a DVD player with similar PWM chip blown (TNY267 if I remember correctly), but I will go the right route, order same chip, and make an improvement add a power button so DVD will not be powered at al if not used. This is the issue with all devices plugged and run in standby, if chip inside is not designed for a lifetime, thy high voltage and continuous pwm will short it.
dodgy is not a word i would use ..the word i would use is innovative... that describes what you do with ypur knowledge of how things work and a method to keep things working.. i think the owner is happy to have it back working rather than the power saving feature the manufacturer put in as a selling point..good work Sorin...
excellent substitute......but one thing what did you do to get the device turn on in the last....your small power supply 3.3v was not working earlier....but what happened that it suddenly started to work??
I love the knowledge you share with us thanks for another great video.
The end result is it works and it is safe. Perfect repair work. Nice one Sorin!
Sorin is genius like Doctor Frankenstein. Some love the monster, some hate the monster, but ALL are FASCINATED..
Edits NO, raw vids YES.. I never get bored on his videos thats a mystery...
2 hours+thats longer than War & Peace movie!
ikr same here
Lol, same here. Loving all his vids man
this is a real troubleshooting. lots of respect. 👍
Nu pot sa cred ca ma uit de cateva zile fara oprire la video-urile tale si nu mi’am pus intrebarea daca nu esti cumva roman!!! Foarte tare ! Tine’o tot asa... putini electronisti mai sunt in ziua de azi...
You are amazing.... Great work. Love that mini-amp.
I don't think there's any issue how you fix it, as long as it's made aware in some way. Or the price represents the job. Customers won't understand anyway so like I said ? As long as it's sorted out in some way that everyone can understand... I can't see a problem👌
Great work as usual
Looks like I'm watching a Sherlock Holmes movie... "Elementary my dear watson!"
Best video so far!
:)
That was 1 brilliant fix, and no schematics, well done Teacher.
tell that chip smoking is bad for him :)))
Of course it is easier to change the chip, condenser and diode,fast and simple measurement of several elements but then we did not learn anything - right?
Great and helpful clip - thanks
Hi . Please could you help me i have a laptop didn't shutdown. When I shutdown it the screen sleep but light of power and every thing still on until i press the button to shut it down any solution please??????
How comes you can solder a live wire without shorting it?
Isnt the tip of the soldering iron connected to the earth ground? If you touch a live wire, it should short the powersupply, not?
Thank you for another great video! I like messing with stuff. I love to least least try to fix broken things I have at home haha (or improve them, which sometimes I like more!). And you teach us how to fix them (provided we have some knowledge about this stuff). So thank you so much!!! I'm learning very cool stuff here... I'll stick with the channel 😄. See if I have time to watch some lives (not sure, but would be interesting).
A thing though. When the small power supply wasn't working, maybe you could have checked the current? The voltage could be the same, but it could have dropped the current, maybe? Or that doesn't usually happen? (Or it can't happen at all because of the power supply or something?)
Another great video from which we can learn many new things! Thx Sorin!
thank you very much sir giving good thinking knowledge to improve my self confidence watching all your videos once again i very thank full to you sir
WoW! definitely an intricate repair! Thanks Sorin that was an amazing ..........
This optocoupler trick to find the output voltage is really cool!
you are the best Sorin thank you for all your videos , um really learning a lot from you .A generational changer
I hope not he's a cowboy hobbyist I hope you don't learn a thing from him ,if you want to be in the electronics field then study and learn don't follow this guy
What did you alter on the new 3.3V supply board (something with the wiring) shortly before the end of the video when the unit began to work?
I like your style, what you said its completely true, maybe 80% of the world its in poverty and its very difficult sometimes get spare parts from ebay, etc. I am in argentina, and i can order on ebay or china, but takes months and a lot of papers to get the stuff here, so for the client is not fast if i work in that way. So i am doing like you, taking spare parts from where i can, i think is good becase we recycle and is good for the environment. My channel is on spanish feel free to take a look if you want to do it, saludos!
I"m so glad that Sorin is so entertaining and fun to watch because i don't understand a damn thing he was doing! HEHEH. Until he finishes his beginner electronics classes, i'm not aware of all these different procedures he performs. Great video otherwise.
He show how he is repairing electronics, not training others, you have understand what is he doing if you have already repaired 1,2 .. switched mode power supplies and understand how they work.
@@user-ug9nn then this is not any electronics repair school ... because what kind of school is this where they don't teach anything? ...
Sorin, great video as usual.. i bought same mini switching power supply to repair laptop power rail, but it did not work. Do you think it could be because the original driver could not give PGOOD signal?
yes, you have to simulate that signal also
thanks Sorin @@electronicsrepairschool
is it best to simulate PGOOD signal using 3VALW? I tried using 3VLDO and it didnt work it. I am trying to replace 5V power rail. @@electronicsrepairschool
Dumnezeule!Sorin, cat te complici, repara circul ala de sursa si nu mai modifica schema.
43:12 - Sorin, I couldn’t tell if you were licking your soldering iron or smelling the burning flux.
The veterans move, of electronics..
Thank you for the experience , Mr.Sorin :-) You´re very good teacher! Never give up! :-)
Can you anytime make a video about different soldering wires ? Whats the difference? What are you using?
Hi Sorin, I really enjoy and learn from your videos. Do you think the problem could be solved if the diode was identified earlier and you replaced the diode and the fuse? I am wondering if the part you connected 30V to the supply and saw smoke from the chip , that was the point the IC burned, earlier it should have been working since the short on the supply burned the fuse.
gat1994 hi, no, not the shorted diode burned the fuse, the shorted hv chip burned the fuse! The chip was shorted from the beginnings, thats why i came with 30v on a 300v power rail and the chip was smoking.
Sir what model and brand of your microscope that you are using
Hello, first of all good videos thanks. I have a frameless TV monitor so not very old (2-3 years) a friend left velux open and rain went into base stand where power button and severall other buttons (no essential for TV usage). on a pcb strip connected to monitor via a micro ribbon (5 lines/connections) All I want to do is to get it to turn on. Its been sitting here for a couple years now. Thinking this might be a way of introducing another button. Is there a way I can make a connection to turn on the TV to see if its working? I know these questins are almost imposible to answer specifically. Just jump the TV somehow?
Great work Sorin, it was a hard job but you did it in the end :) Can i ask what is the camera looking down at your desk, it is good quality.
you are a very clever man, love your work, all of the best to you
Thank you for the lesson!
Lol I found you a week ago..u are really entertaining and enlightening
You are a genius. Great job.
i have never in my life binge watched a RUclips channel , But this one YES great Videos you remind me of me working on stuff. use your brain and anything goes even if it means redesigning the circuits to get it done great job . might want to try a filter cap on your output on that small supply
Such a skilled person. Awesome.
Yes what you did speaks volumes for the elections repair . In poorer counties access to parts is hard or next to impossible to obtain .
It’s not a dirty repair to me , it’s using your knowledge and skill to repair something that would have been dumped a long time ago . 👍🏾👍🏾👍🏾😎🔥🔥🔥🔥
I have used those cheap chinese adjustable switching power boards and they have all failed not long after installation. Hope you have better luck.
The switch mode PSU you can fix with a STR6053 ic mod
Lunea nici iarba nu creşte........tocmai am realizat că sunteţi rommân şi nu unul oarecare,vă mulţumesc că ne împărtăşiţi din vasta dumneavoastra experienţă,BRAVO !!!!
I like the opto-coupler trick for identifying unknown rail value -- I'm will try on a supply from the bin.
O treabă bună Sorin, poți rezolva orice.
I would check the amplifier output to be shure i didn't introduce any noise to audio input stage
see you later Sorin ! Thx for your modifications you are a real thinker , a true hacker..!
Yes it is hard job, but was great seeing you adjust the whole switching power supply :)
Welcome Back Sorin!!
The chip ICE3BR0665J is 3,69 GBP on Ebay.
what and where, to soldering.i hope you can zoom in the pcb of power supply.thanks.
@Electronics repair school, Good Job Sorin but why i can ear "Fii mai bun" song from Adriana Antoni? :I
Those small dc-dc step up board are janky . They sometimes overshoot the voltage (to max boost voltage) when you touch them and of course you fry sensitive logic voltage level circut. They have their place for non sensitive low priority stuff but not sensitive stuff...
My conclusion at the end is that green wire has an intermittent break. If you follow through your connections and voltage apply points you will know why it just starts working. If you move that green wire around a lot my guess is timer error will come again.
For me it is not doggy job. I like your idea and i admire you work.
The only thing which is not good for me is that you left there burned ic/chip and also you didn't took out all diodes so they are working now in blocking mode -because voltages are coming from other side. If they will fail (because of this) one day, then all voltages will go to transformer on secondary side first - i don't know what then will happen. And also if you've puted 12volts on 3.3v power rail (by accident) then because of this you should (this time you really should) connect any speaker or even headphones to check everything - if amplifier is working - if there is any sound or good sound without distortion. Because even if that 12volts didn't destroyed anything, then one question appears: Are you 100% sure about that short to ground on 12v rail (which you discovered) was there only because natural diode death, or maybe something was died on the logic board before, and then after the diode died. If your chip can stay there burned and it doesn't make any issues now, so maybe the same situation can be on logic board? - something can be bad (burned) there now, but it doesn't make any shorts now anymore. That kind of idea should be enough to force you to check whole unit more that only "power on/off, screen light, cd out/in/spin".
I admire your work and ideas. I like them, but sometimes I don't understand how quickly (without full testing) you make a conclusion that everything is working. (that kind of testing will take only 2-3minutes more)
You've said good thing, that"fault was only on that separated power supply so the logic board should be fine." -which normally is true, but not quite here (because that diode could die because of something on logic board, and second thing because you put 12v on 3.3v power rail. That two reasons makes that quote less sense). Thank you for video.
'You've said good thing, that"fault was only on that separated power supply so the logic board should be fine." -which normally is true, but not quite here (because that diode could die because of something on logic board, and second thing because you put 12v on 3.3v power rail. That two reasons makes that quote less sense). Thank you for video.'
Ok, :))) Well, i come from vcr age, so logical speaking that 15 v power rail its used only by mechanics (dvd drivers+motors), they have to keep electric motors on a separate power rail because of noises made by brushed motors, and i knew its no short there after i checked with my lab power supply. About the 3.3v power rail, ignore the fact i used 12v, you can use 220v on a 3.3v power rail, its all about the current limit, on my current limit voltage dropped to 4.4v, most likely there its a zener diode for protection
@Electronics repair school Thank you for answer. Great explanation about 12v rail. Normally if you push play button it should automatically switch to CD mode and start to read music. You've pressed eject button and cd goes out. If for eject you do not need to switch to cd mode, then for the play button should be the same - and it should automatically switch to cd after you push trace back / put cd in. So that was strange and that is why I though that maybe something on the board is bad now, which was using 12v as well.
And about 12v on 3.3v... everything is because we don't see voltage anymore - only the amps. I know that it requires two cameras (one on left and on right) but that is why when I've heard your words that you set 12v on power supply, and then after you touch capacitor I saw 2,65ampers on the screen here 20:33, then i though that board gets 12V at 2,65ampers. You didn't say that voltage drops below 4.4V. So please understand me :-)
Sorin, when will You start Your own school/online course? I'm in London and I want to learn.
Hello, I ‘m following your repair for a few months ago, you are really doing a good job. Recently I have problem on my Dell Inspiron 3521 laptop. The battery stop charging. It is appear (plugged in, not charging), the battery life is 65%, I tried many issue (remove and update battery driver, I tested other AC adapter, etc...). When I enter my laptop bios setup, I checked that the laptop did not recognize the AC adapter, it displayed (Unknowing) instead of (65w). Please how I can fix this problem and thank you in advance.
are you using a genuine charger? i think you are using a generic one and this one does not have the middle pin wich is used by the motherboard to identify the charger. or you are using a genuine one but somehow you dont have the corect voltage on that middle pin. the laptop will power up but it wont charge the battery. the message will be "plugged in, not charging".
@@breakthru3000 thank you for your answer, I'm using a genuine charger, I have tested many other charger with higher power (130w), but i get the same problem
If you really use the original charger for the DELL 3521 notebook. It is not only about the right power (65 watts or higher), its also about the right power sensing (e.g. middle pin). If the charger is the right one, then the problem might be in the notebook itself. In that case, you have to open it and measure it out. The easiest case would be a broken middle pin connection in the charger port or not far from it. Worst case would be Super I/O chip is not responding to correct middle pin signal. Only my 2 pence.
Your prices seem very reasonable, where are situated in the UK?...
The CD inside the player is "Adriana Antoni - Fii mai bun" a romanian folklore singer.
Catalin Ursu coincidence? 😀
@@rayofcreation3996 , I supose Sorin is repairing for all kind of clients and even for friends or family...
Sorin can repair the Satellite in the Space, give him one Multimeter and Soldering Iron. 👍👍
Nice work around! What was your final trick to get it work?
un mic comentariu din partea mea precizati si ce riscuri sunt cand se lucreaz cu surse sub tensiune multi poate nu stiu.
If an amplifier stays on it can produce still some noise, sure if the power supply is not grounded which is the reason with 2 pole ac cable.
which country are you from and what is the voltage of the electricity grid in your country? ...
Sorin, Somehow i think you will be buying more of those higher powered buck/boost modules :-D.
It is naughty, i'm not a green learner, But "You have to do, what you have to do".
That p.w.m chip is an oddball, "Unobtainium" lol.
Completely brilliant. Damn.... you are awesome.
At 56:42 I thought Sorin will say: We failed badly because you didn't say I'm doing wrong! :)
From my knowledge that big tranformer for the amplifier to amplified the sound signal to speaker.
The timer led flashing codes a fault in the system. It is like the beeping codes from bios self test
I have lenovo g565 and a i have on power button 19v and on start up cip 0v can you help me
probably a mosfet or a short on the 19v parralel
It was too longue video but learning too much, you could solder output buck converter from the first to second easlly to limit using much wiers, what you did is great idea for quick fix for someone who need device soon, else it take power cunsumption, also to protect transformer that could fail with 24h power on it, also the manifucture use old posersupply methode for limiting noise on powet amplifier to get better audio output
Thanks for all your videos
I need dump for bios asus rog strix hero II gl504gm
When he bit that wire, he became a legend.
Hi where is your shop? Are you in the UK?
Have you got any ebay link to this switching power supply you're using. Can only find large ones
No worries, found it when u went on ebay in the video 😂
We are at the same page, two thumb for you.
Isn't fixed until you test the power amplifier at full volume. The broken PSU is not a tiny one. It's probably built for near 100W. You replaced it with modules under 15W. What if the 22V rail feeds the 2x50W output amplifier? It will burn.
thulinp u got it wrong, the audio amplifer works on the linear transformer 2x35v!!!
OK then, that's good.
I screamed at you while watching for your dodgy ground lead, both when using your power supply and with the meter. Terrible. Make some croc clip leads. And soldering while the power is on. Just no.
Which microphone do you using ?
Thanks for another great video, worth that 2 hours of watching to see the Pioneer logo which means it's working :D
Sorin Man that’s awesome 👏 very hard one. How’s possibly you now what to do to make it work it’s amazing 😉 its not too long it’s going and coming to the working solution at the end.
Thank you 🙏
what circuit is that u add ?
build your own power supli with the small switching ps which you bought
You are amazing, we love you