Advanced diagnostic methods using pure electronics knowledge without schematic
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- Опубликовано: 22 июл 2024
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Finally, humanity has advanced to the point where we can have entire channels devoted to circuit-board repairs.
I watched a couple of your videos and the next thing I know; I am repairing OVER 80% of dead laptops coming to my shop - with NO schematic. The other 20% are not failures; they are only "Not Economically Viable" repairs. That's my personal code word for "I can't figure this one out and a new board off eBay is under $150 US."
Great video Sorin.
A real TUTORIAL.
Why?
1. Because you were 'THINKING LOUD' and so you explained us why you put the probes there and not elsewhere.
2. You focused the camera on the component under test.
3. I 'm sure everybody understood, even the not advanced ones.
I learned a lot, thank you!
interesting points ,if anyone else wants to uncover
electronic repair centre
try Saankramer Electronic Magazine System (should be on google have a look ) ? Ive heard some incredible things about it and my friend got excellent results with it.
@@LyubomirLalovMulti Hahaha... LL ... i did search for "try Saankramer" and found you and your cousins advertising for SEMS in similar fashion ... but did not find anything being referred to by you (perhaps you could return with a valid link) ... hahaha
agree 100% that was a great tutorial.
I could watch this all day. "If you screw up, keep going" words of wisdom Sorin. Peace too you.
This was one of your best, Sorin. Really enjoyed watching your thought process when the things went wrong. You kept your cool and were so patient. I liked your creative solution and adapting your way around a problem with the materials you had on-hand. Each time you had a problem, you would lean back with your pipe and think about the things carefully. And you would talk about the problems and how they can be avoided. Really a good video, Sorin!
I'm halfway through the video and already loving it! No schematics, pure electronics approach is truly inspirational! Thank you
Thanks. Enjoyed this discovery and the smile on your face to turn up the dial when the customer left is golden.
I just finished repairing the same issue you had with that ss34b diode on the Sony after watching your video thanks sorin your the man
Sorin, you cannot replace a Schottky with any diode. Schottky diodes are fast in switching on and off. If you replace it with a slower diode it will lose half or more of the pulse by the time it turns on and after the voltage is smoothened with the caps you get lower voltage because the slower diode lost a chunk of the pulse.
I don't understand a lot of electronics, but I can say - you have THE BEST repair video setup. Thank you for being so good.
2019 still watching and you ar the best tecnician in the world... 2 hour duration and i keep watching...nice sharing sir
I fixed a Vizio 1080p LCD TV for $8 using information I learned from watching your videos. Thank you for what you do!
Thanks! One new SS34 diode later (which I scrounged from a usb car charger) and I've got a working GTK-XB7 speaker system which someone was throwing out.
I'm sorry for the cheese but my dad was one of the best technicians in Alberta, Canada on the news a few times. i was never super interested in electronics untill about 5 years ago. My dad passed 10 years ago so i missed out on him teaching me. Except for the accent, Sorin reminds me of my dad including his patience and great knowledge. I cant stop watching him and learning. I struck GOLD finding this channel.
Thank you Sorin
so relaxing... and hearing music at the end put a smile on my face. thank you!
Sorin you are an perseveringly patient man!
38:06 Sorin to be sure what the component is - just take a look for the white marks on the borad. In electrionics first letters always means what componet it is. So "D1" D-means Diode, "ZD2" ZD means zener diode, "R20" R means resistor, "C3" "C109" C means capacitor, "U3" U means unit/chip/ic, "L11" L-means coil, "PQ..." or "Q..." -means transistors, "F..." means fuse, "JP..." JP means jumper bridge
'Q' means it's either a transistor or mosfet. PQ means it's a mosfet in power regulation, usually the VRM section or step down section on the computer motherboards. Similarly PC cap I think.
except for zener diodes, often it's marked just D. I worked for some years in a repair shop, not an expert by any means but that's what I'me seen.
FB means ferrite bead
2 hours of pure happiness and education =) Thanx
Agreed
A two hour video but very informative, a true step by step troubleshooting!!!
Great video as always .Keep the good work sir .You are the best teacher .I have learned a lot from you 😁
Really this kind of real time experience is more help Full to the learners. I could learn many new techniques for repairing motherboards.
Thank you very much...
Hello Sir, I watched your lots of videos for fixing Laptops, TVs etc... I want to learn patience from you. I am really lucky to see your videos and each and every one of the videos are really worth and i learned from you. Thank you Sooooo Much and really interesting.
2 Hours well spent.. Thank you for sharing your experience.. Nice Field modification at the end..
Honestly, you are the best electronic magician that I was lucky to watch, what you do is great. Live as long as you can and teach people.And do not pay attention to criticism, you are the best thank you.
I suggest Mr. Carlson's Lab if you don't know about it already :)
I watch 2 hours full video with out skip.. i'm addicted to electronic ...❤️ it's my drug.. 👍
Thanks for those videos. I have a broken DJI Mavic Air drone that I'm going to attempt fixing. I've already learned a lot from your videos!
Sorin's mistakes are just an indicator. how resourceful and how to solve the problem in the simplest way.
Many electronics from the West will say - that is not the case, so it does not work. But just such, they have a lot to learn from you and Sorin.
you have the patience of a saint .... great work and diagnosis ... 👍🏻👍🏻
You're literally the reason i got my gtk xb7 working again. Just replaced the p3490 and ss34 and its back!
Hey where is p3490
@@mxc619 full part name is EUP3490
Thank you! Video showed me I was on the right path trying to connect the ribbon to that location.
Enjoyed your perseverance! That 7805 May even cut some switching noise out of the audio.
Done it my self years ago as a tv repair man in ireland good man keep trying.
Love happy ends like this even when its 5 Years ago!!! I watched the whole thing and i dont get bored for one second. Impressive! Ive burnt a lot of things but the happy ends are the best. Keep going and cheers from Germany
really experiencrd tech .. the moral is really carry on .. thumbs up highfive from libya noth africa for the successful repair
I always enjoy your teaching sir. it's like a puzzle it's so interesting sometimes
it is very good that I want; I couldn't graduated of Electronics troubleshooting. therefore I will try to learn from your experience. Thank you!
Fantastic thank you love Your work & wisdom / philosophy , reminds me of my mid 1970's fixing mainframe computers etc
I thank you 🙏
You never stop and get it working great again. Man you are the best👍🏻
A very good repair & explained well, you are talented. I enjoyed watching this.
This was a great journey! There was some same kind of issues, when i fixed Salora videos. There was a dirty loading encoder switch, which caused malfunction. Before that i make some miss thinkings. I measured it's power supply lines (18, 16, 12, 5 and -21 volts) with diode test and -21V line seemed to be dead short, but it was okay. The line powered videos display and obviously it was okay to have about 8 ohms in that line. When the machine was powered i measured all the voltages including -21V. In some point I thought, that one of the main boards resistor was open, but actually it was a cap, which looked just like a regular resistor.
Ive been doing this for 35+ years.
You are a master!
Thanks for showing what "goes wrong!"
I have one on my bench today with the same problem. Wish me luck please!
I'm no electronics expert...but I opened mine up and took a look.... My power button does not work but when I connect to wall outlet the color lights turn on I lost power all of a sudden.... When I connect wall outlet I hear a click and that's it but the lights do stay on....???
My Sony gtk xb7 is doing the same thing and it started when I was holding down both add speaker buttons after holding down both party chain buttons on the back of them...I own two gtk xb7's and was trying to link them together when it happened or stopped turning on...
shocking video. the best of the advanced. there use to be time when diode was just diode, now days we have others. These diodes I found on macbook going to the screen it has very low resistance
Having schematics is a luxury that not everyone can afford. But as you said - no matter what, we must carry on. So carry on, my friend! God bless you!
It takes some time for their release. A Vietnamese site have a lot of them.
Ever heard of free downloading it?
Chilling out with 2 hours Sorin epic was fantastic !
Sorin is electronics zen, no doubt about that. There's no rush, there's no anguish. He seamlessly flows through the time, not affected by it.
Hi there, I cannot stop myself to watch your, excellent videos,,support from Australia..keep it up buddy 👍
And very good how you found your way too the problem area love your videos Sorin I am learning a lot from you many thanks.
Just found this channel. Love listening to his voice and what he is doing. I used to be an electronics repair man but shops like this is almost gone here. Its easier and cheaper to just buy new things. Kinda sad.
if it is cheaper to buy new,then some' is wrong...
@@andrew_koala2974 Great comment here sir. Where are you from? How you calculated the total prices, starting from the spare parts they selling in his website?
It's a Schottky diode.. pronounced as Shot-key... A great video. Learnt a lot of new things. Thank you so much for uploading these videos.
Two hours of a great video, amazing , Thanks again Sorin
Great Video Sir, i like what you have done to find trouble, best teacher.
That's not dodgy, that's sheer brilliance
Good to see you. Thank you again for sharing. I know very little about electronics but I want to learn.
Loved watching, I have 4 xb7's plus 2 XB60's the windows nearly fall out hehe ;) Keep up the Good work
Thank you very much for uploading you'r videos in very good video quality. Keep up the good work .
I replaced the diode with exactly the same, same problem bad Chip. So I did your bypass. Thank you
Great effort to make such an educational video. really enjoyed it. Thanks for your work and keep it up.
Mr Sorin I really like your style, am impressed.
Great video Sorin sat watching then looked at my clock 2.30 am in the morning uuups :)
Awesome job Sorin! You are a master!!!
Nice diagnose, and perfect solution :) thanx for another great video
Sir keep up the high level, thanks for all the knowledge ;) Can`t wait to hear - Hello So We are back yes? ;)
Thanks Sorin that we learned something more today❤
Great job!! Swinging those caps around!!
I got same problem and it seems that the diode is really naughty. I replaced it with 1N5822 without burning the chip and the speaker is working again like a charm :) Thank you very much for this tutorial! I love the way you described all what you were doing during the analysis.
Do you think the chip failed because of the improper diode he put in, or because the old diode shorted it out?
1:46:00 thanks for show me -that linear regulator will be good there as well. You have right -somethimes is better to use it, than buy and wait long for new IC.
But then i was affraid that dropping 12V to 5V is a huge work for regulator (over the half), so it can be a very very hot, and you put in directly on capacitor, so basically you put heater on capacitor, which is very doggy haha :D :)
But if is cold (as you said) then no problem. The point is You had very good oportuninty/chance to explain us, that we have to check current value first and then temperature of regulator and keep it away from capacitors and if it is very very hot then we can use a small heatsink to low temprature. I bet a lot of people here didn't know about that.
But anyway - thanks again. I love your videos.
I love this Sorin-Style brute force method! 😂
Good to see you! Thank you for the nice work
Salut Sorin! exact aceeasi boxa, exact aceeasi problema. Multumesc de ajutor. Iti sunt indatorat caci multe am invatat de la tine. Tine-o tot asa.
Salut nu inteleg pana la urma care ar fi problema si ce trebuie schimbat ca aceasi problema o am si eu
@@mariusgaby Salut. Problema este regulatorul de 5v, si cel de 3,3v care nu mai functioneaza conform parametrilor sau de loc... e mult mai ieftin si mai rapid sa faci bypass prin buckconverter, ceea ce am facut si eu si Sorin.
Multumesc revin cu detali daca reusesc sau nu
I haven't watched this video yet - still catching up on your previous repairs because I only recently found your channel - but you're already my new favourite.
I'm thinking of buying a thermal imaging camera to scan boards at start-up to replace the infrared thermometer I use now.
I'd love to hear your thoughts on that, and on whether to use a smartphone attachment or a self-contained unit?
Thanks very much , this is exactly what Im doing right now on an industrial computer that you cant get a schematic on.
long video.Editing but that takes time to.You solved the problem.This style package regulator component can,if not supported vibrate and get loose in things like car amplifiers boom boxes etc.I liked it.
Great Video.. Learn something everyday from you're Videos.
I'm not sure, if anyone else pointed out, but you could probably use 5V from that USB power supply you found at the begining; but ok, you did find another way around, thats what counts. ;) Anyway thanks a lot for all those videos, it was really helpfull.
That was real faultfinding engineering and use of creativity well done and thank you ..I can only wish I could be a good electronics engineer like this .... I fix printers power in power out that's it very boring wish I could find electronics job like this to learn the craft.
Just go around every TV/electronics repair shop in your area and ask around if they're willing to take you in as an apprentice.
It is a diode. The 'D1' on the board is a big give away.
That’s what I call thinking out of the box, enjoyed it 👍😀
I think you are the master of motherboard repair
Nice good job mate :)) descriptions look alot better !Nice little hack, might be worth ordering
some of these diodes there not that expensive maybe have a little stockpile of many electronic
components, or replenish the stock pile of old boards LOL
congratulation , you sure gifted with patient
Thanks for a good lesson on fault-finding !
What a challenge. Glad you stuck with it. I would have been cussing after the first diode Thanks for sharing.
Dude, you are awesome. Thanks for sharing your knowledge.
Way to go Sorin, You did it again!
That is what i wanted to say. Thank you very much Sorin!
your a very clever guy I wish I new as much as about these things nice one keep making these vids and the good work lol
GREAT GREAT GREAT, I learned a lot from this video sir
"SCOTCHY diode....or whatever" >_> LOL ! :))) I laughed so hard at that ! Great stuff ! :D
in my language "skotky" means "with cats" 🤣
lovely lesson sir.. thank you so much.. you ra just great
Mr sorin works is professinal thank you mr sorin
Good "old fashioned" trouble shooting! These techniques apply equally well in industrial electronics; especially when diagnosing "unknown" boards and devices with unknown symptoms/complaints. When the customer only knows "it needs to be fixed".
Point of load (buck) regulators are recognized by their inductors (one end of which is supposed to be the output. The controllers data sheets will help dramatically
49:40 very good idea! good logical thinking Sorin.
Спасибо тебе чувак!!!
Благодаря твоему видео починил свою колонку.
Вот только ты так смело kia7805a поставил без радиатора. У меня сильно греется. Поставил радиатор!
👍👍👍
One important lesson I learned from this video is that replacing a wrong diode can take down a switching IC.
i did a little electronics back in my younger day and i love it....can you advise any good book on power supplies..also good book on mosfet ...what spec should a decent power supply have ..you know the power supply you use that you can vary voltage and it outputs current.
Great great video the best video i am see in this channel.
A nice long repair video. I press like before watching. Keep it up!
so educational... thank you! it's really interesting to watch how to track down problem to specific component. Only trouble is that it takes so long, probably not worth to fix broken electronics unless it's very high value item. I wonder if thermal camera would have helped, or some kind of voltage measuring machine which can sample all the test points at once.
I can see now why thermal cameras are recommended.
thanks sorin :) have a nice day
Very informative video Sir Millions thanks!