@@pawelnowak9400 haha. thank you. so the logic is fairly simple, if the test device is short circuited, the circuit is closed and the bulb glows and acts an absorber of all that inrush high ampere current and prevents the test circuit from further damage?
Pawel Nowak www.giangrandi.ch/electronics/smpsfix/smpsfix.shtml. Tu jest wyjaśnione , żarówkę daje jak wiem ze jest pewne zwarcie i zmiana bezpieczników kończy sie spaleniem ,
I know he doesn't care but that's an awful job , it hurts the eye of professional technicians : tracks cut off out of laziness to unsolder components while looking for short … (it takes 1 min to unsolder a component FFS) replacing component with an spliced pin : absolute recipe for failure on a component that produces lots of heat … fantastic "eye calculated amperage wire" new fuse ... these are like African cheap jobs but done in wealthy UK … totally unacceptable for that raison !
he clearly has lots of experience repairing things but he lacks work ethics … he uses brute force methods and don't forget : In the land of the blind, the one-eyed man is king.
@@ElegantZZZ You're kidding right? So you charge triple the amount for desoldering a component versus scratching away a trace and then bridging it with a piece of unmelted solder? Hot gluing a laptop hinge is one thing, but the work shown in this video was shoddy.
a professional takes pride doing proper clean job not only to show respect to his customer but also thinking about the next possible technician that can come several years later and looks at your job … sorry, I don't want to be next technician to put my hands on a device where Sorin has worked before as he ruins it. (modifies tracks, crappy jumper wires, replaces with incorrect components, alters safety circuits, etc). a smd capacitor, diode or mosfet transistor costs peanuts ! you can have a little stock of these components and do clean replacements , these cheap components doesn't alter the bill for the customer as it's the time the technician spends doing the job that increases the costs. and don't tell me that charging less to the customer allows you to do rubbish work FFS !!
funny you grab the same board and the same mosfet is missing. i played with tv and vcr repairs 30 years ago and inevitably found that common failures in the same model were well ....... quite common. save a few cents over thousands of sets................. or just plain bad engineering.
@29:00.. "replaces" fuse with a wire... Just for testing.. Yeah right you are not fooling us.. Sorin you are the master of dodgy repairs.. No way that is replaced
Sorin, I like your videos, and I learn a lot from them. I also like your shortcuts and brute force methods, and that haters is just there for pisses you off. Ignore them. One question, that psu is fixed by replacing shorted mosfet. But in many cases shorted mosfet also blow PWM controller. How we can diagnose damaged pwm controller that drive switching MOSFET. One person tell me but I never tried to test that method. Method is this. We take some PSU for repair, remove shorted mosfet and come to Vcc and ground of PWM controller with regulated power supply (check in datasheet of pwm ic which one pin is Vcc and which one is ground and what voltage need to be). Then with osciloscope test the output of pwm ic. And if we see pulses on osciloscope we know that pwm ic is good. What you think of that method, and is there something different easier method? Best regards
My lg tv does not powers on. When i flick the wall socket switch ON, the standby Red light comes on goes off comes on goes off and then keeps off. And the television doesn't respond to remote or tv buttons. What could be wrong?
Dar ţara nu se face cu lănci, cu apatrizi, Iubirea nu te scuză când ochii îi închizi...muoltumesc pentru ce am inteles pana acum...raman roman, nu vinitic
Good video, but i would use a bigger soldering iron especially for desoldering the heatsink. Dont just cut traces, desolder the component, it doesnt look good brgds
Hi Sorin nice to meet you here, im doing tv repairs, if you interested I can give you some advice and show you really great tools they will make your tv repairs easy
Hmm, so a 600V part blows but a 500V part is good to replace it with? I would have ordered the correct part even if the customer had to survive without TV for a few days more.
@glyn hodges I totally get that, and I grew up in the countryside where we had to jury rig many things to keep going. But I no longer use a stocking to replace a fan belt - I use the second car to go and buy a new belt......
I have an LG 55UM6910PUC it just shows a blue/Green screen. When it first happened there was audio and you could switch channels but no picture. Now there is no audio so I can't tell if the channels are changing with the Remote. When it first starts you hear the startup sound but the screen just goes to blue/green.
hahaha I got today a switching power supply for repair there was the security through and a mosfet broken then I come online and see the video very nice: DDD
If you don’t know please take note “ do not touch the large reservoir caps they can be charged upto 400 v or more it’s enough to stop your heart and can be fatal” and be careful when feeling around the back of the board too I have had a shock of a board that I had in a box for about a month or more As for the fuse if you use a piece of wire like that if it blows the skid mark it leaves will have metals in it and can cause more damage
Sorin repairs become simple the practice of many years is in sight. The difficulty is that still studying its mathematics electronically the passive components, semiconductors and many and many discouragements.
Hello from Croatia, what do u do when there is no datasheet for the mosfet?? Is there any other solution? Can u teach more about driver for mosfet, you were telling about the waveform. Thank U , u are helping so much :)
Tried to repair a Samsung PSU today too but sadly a chip was gone and I can’t find it to buy anywhere. So instead replacing of a 3€ chip I have to buy a new PSU board for 80€.... :(
sorin pls make videos how psu and mainboard of tvs work and how to find failures.pls.you make so much for cellphones and laptop,but tvs are not so much.im sure sooo much will thankfull to you
Boost FET shorted. Saw that many times in power supplies. Good it didn't short gate to drain. When that happens it usually kills the control IC. Nice work!
No scoop needed this time only for reading Nice to see where the current is going to. And the components are big Thank you for the nice fuse replacement 🥴😂😂
Hello, too bad (!) Not the LG (unless they use Samsung boards ?) do you have a video on the alim of the LG (LB550B) ? I understand they may be very similar and I am not that lazy, but so much of a beginner ... Best
My laptop was not turning on and also my adapter was blinking then I tried mentioned methods in lenovo forums I removed battery, removed Cmos connector, then held power button for one minute and then without connecting battery provided a direct power to laptop, it blinked for But it blinked for a second and then went dead. Then on youtube a guy showed a step "to remove keyboard connector flex and then turning it on by novo switch and it worked. So now keyboard is dead but laptop is working. Is there any way to solve the issue Kindly help
Hi, What about when you have a LCD TFT monitor screen whose backlight turns on for about 2-3 s then it shuts off ? 🤔😞 How do you fix that ? The image is seen on the LCD if I shine on it with my pocket LED flashlight. I replaced a couple of electrolytic capacitors that were bulged or leaked. What to check next ? 😖 I do have the standby voltage (5,5 V) on the connector (that leads to the logic board) as well as 3,4 V. All 4 CCFL bulbs are fine. Thanks ! Best Regards,
@@badeadrian Yeah after some investigation I found that the OZ9938GN chip was dead & in fact 2 CCFL tubes were dying. 😶😑😕 Still successfully sold the monitor recently for about 20 €... 😇🤗😄
Hello sorin i have already watched all your tutorials and everytime you have new one i always watched them aind i really appreciate them, one thing i notice is i havent seen that you are using solder sucker to remove components to test them if they are short, like that one you just cut the pin if rectifier bridge, i suggest that you use solder sucker on your some next tutorials, thank you very much and have a nice day
thanks sir...learn on internet,especially on yutube,like this channel make me became profesional engineer...learn,practice,pactice learn..,..sharing of our knowledge,,,..im an electrical engineer student...thats means its my pleasure....
the best thing ive learned on electronics and its beautifull its the absolute maximum rating law ,, when salvaging parts , we can ALWAYS use More higher rated parts than removed ones
Bambo Leo Yes ive been repairing electronics since i was a kid, but im still thicker that a bankers wallet lol. There are lots of things i may never fully understand, but that never stops me repairing stuff. My habit of taking things apart to glean an understanding is still alive :-D
@@zx8401ztv Brilliant. Keep grinding eh. Seems youre way advanced than me lol. Im still new at these things it began about 3yrs ago and im 23 now but should keep open minded for new thing to learn, and here we are with madlad Sorin, the best on yt. Yeah electronic is fun really fun. Cheers mate 👍
"What I will do, I will do nothing" Epic!
"If it's blowing we will see together. Nothing else would happen"
Puts the board back and runs away before the collegue powers it.
That's how we grey-haired fellows survive this long!
I'm new to the channel, does he change colleges often? ;-]
Dumah Brazorf when you are afraid to plug in your own job it’s remarkable.
That was so awesome and funny!
nice doggy work by profesor sorin.enother lesson from profesor thenks for that lesson.
Well done
instead of fuse, I put in a 100w 240v bulb, and start repairing the inverter . when the bulb is lit, there is a short circuit on the first inverter.
can you explain it a bit?
i believe this tip would be help me in my diagnosis procedures immensely. thanks!
@@NarasimhaB bulb got to be in series on power cable, or just solder cables instead of fuse. It must be translucent bulb.
@@NarasimhaB I found this for you. ua-cam.com/video/wRFRwOnLsZI/v-deo.html
@@pawelnowak9400 haha. thank you. so the logic is fairly simple, if the test device is short circuited, the circuit is closed and the bulb glows and acts an absorber of all that inrush high ampere current and prevents the test circuit from further damage?
Pawel Nowak www.giangrandi.ch/electronics/smpsfix/smpsfix.shtml. Tu jest wyjaśnione , żarówkę daje jak wiem ze jest pewne zwarcie i zmiana bezpieczników kończy sie spaleniem ,
remind me the good old days when all we needed is brain and soldering iron.
I know he doesn't care but that's an awful job , it hurts the eye of professional technicians :
tracks cut off out of laziness to unsolder components while looking for short … (it takes 1 min to unsolder a component FFS)
replacing component with an spliced pin : absolute recipe for failure on a component that produces lots of heat …
fantastic "eye calculated amperage wire" new fuse ...
these are like African cheap jobs but done in wealthy UK … totally unacceptable for that raison !
Exactly, he doesn't care and everyone else in the comment section thinks he's a god.
he clearly has lots of experience repairing things but he lacks work ethics … he uses brute force methods
and don't forget : In the land of the blind, the one-eyed man is king.
People don't want to pay for electronics repair , that's why he's doing it in that way. He propably charged 20-30 quid instead of 90 or 115 etc
@@ElegantZZZ You're kidding right? So you charge triple the amount for desoldering a component versus scratching away a trace and then bridging it with a piece of unmelted solder? Hot gluing a laptop hinge is one thing, but the work shown in this video was shoddy.
a professional takes pride doing proper clean job not only to show respect to his customer but also thinking about the next possible technician that can come several years later and looks at your job …
sorry, I don't want to be next technician to put my hands on a device where Sorin has worked before as he ruins it. (modifies tracks, crappy jumper wires, replaces with incorrect components, alters safety circuits, etc).
a smd capacitor, diode or mosfet transistor costs peanuts ! you can have a little stock of these components and do clean replacements , these cheap components doesn't alter the bill for the customer as it's the time the technician spends doing the job that increases the costs.
and don't tell me that charging less to the customer allows you to do rubbish work FFS !!
funny you grab the same board and the same mosfet is missing. i played with tv and vcr repairs 30 years ago and inevitably found that common failures in the same model were well ....... quite common. save a few cents over thousands of sets................. or just plain bad engineering.
@29:00.. "replaces" fuse with a wire... Just for testing.. Yeah right you are not fooling us.. Sorin you are the master of dodgy repairs.. No way that is replaced
Sorin, I like your videos, and I learn a lot from them. I also like your shortcuts and brute force methods, and that haters is just there for pisses you off. Ignore them. One question, that psu is fixed by replacing shorted mosfet. But in many cases shorted mosfet also blow PWM controller. How we can diagnose damaged pwm controller that drive switching MOSFET. One person tell me but I never tried to test that method. Method is this. We take some PSU for repair, remove shorted mosfet and come to Vcc and ground of PWM controller with regulated power supply (check in datasheet of pwm ic which one pin is Vcc and which one is ground and what voltage need to be). Then with osciloscope test the output of pwm ic. And if we see pulses on osciloscope we know that pwm ic is good. What you think of that method, and is there something different easier method? Best regards
Ur method is ok , dont listen to the idiot glyn hodges to feed output of the controller!!! u need to test the output not too feed it!!!
Is there any method without oscilloscope? Also which outputs should i test
This tv may come back again. No new thermal paste and weaker mosfet. Please let us know if it returns. Good luck and greetings!
believe me never come back with this problem
yep thermal paste is important, he repair things in a highly dodgy way some time.
Why cutting a track and the rectifier pin? Why you getting out the rectifier out and testing it using diode mode and doing the same to the mosfet?
I am surprised you are dealing with switching power supply and not using 200W series lamp .................
Thanks Sorin , I like the way you run when colleague plug in .haha :-)
My lg tv does not powers on. When i flick the wall socket switch ON, the standby Red light comes on goes off comes on goes off and then keeps off. And the television doesn't respond to remote or tv buttons. What could be wrong?
Sorin your partner is safe!, not blowing mosfet hahaa
ITS WORKING ! ... You got to love it!
Lazy as always Sorin, you prefer to cut the pcb instead of pulling out the transistor :D
its called "Cost-effective" :)))
Yeah, i know very well your "cost effectiveness" :D :D
mai muntene, tot hater ai ramas... :))))))
:D tot nu stii de gluma, morocanosule :P
Ba stiu :))) Nu ma pot supara pe tine :D
Dar ţara nu se face cu lănci, cu apatrizi,
Iubirea nu te scuză când ochii îi închizi...muoltumesc pentru ce am inteles pana acum...raman roman, nu vinitic
Hey, nice shorts !!!!
Good video, but i would use a bigger soldering iron especially for desoldering the heatsink. Dont just cut traces, desolder the component, it doesnt look good brgds
Well done,with some luck,😀.Many times its driver allso bad.I put 60w bulb on fuse place when I check .Good job.Greeting from serbia
You know! The fuse is like the car tank, there is always more! HaHA
Hi Sorin nice to meet you here, im doing tv repairs, if you interested I can give you some advice and show you really great tools they will make your tv repairs easy
Hmm, so a 600V part blows but a 500V part is good to replace it with? I would have ordered the correct part even if the customer had to survive without TV for a few days more.
@glyn hodges I totally get that, and I grew up in the countryside where we had to jury rig many things to keep going. But I no longer use a stocking to replace a fan belt - I use the second car to go and buy a new belt......
Germanium Transistors; . . . the 1960s
Thermistors as well
You are great at what you do
This exactly why i love watching youre video's, greetinx from the Netherlands / Holland / Nederland.
I have an LG 55UM6910PUC it just shows a blue/Green screen. When it first happened there was audio and you could switch channels but no picture. Now there is no audio so I can't tell if the channels are changing with the Remote. When it first starts you hear the startup sound but the screen just goes to blue/green.
Surely i wasn't the only person who was secretly hoping it would blow up.... purely for learning... haha :)
always a pleasure watching, thanks for sharing. thought it was funny you finding the other PSU of the same type and with all the mosfets missing.
hahaha I got today a switching power supply for repair there was the security through and a mosfet broken then I come online and see the video very nice: DDD
If you don’t know please take note “ do not touch the large reservoir caps they can be charged upto 400 v or more it’s enough to stop your heart and can be fatal” and be careful when feeling around the back of the board too I have had a shock of a board that I had in a box for about a month or more
As for the fuse if you use a piece of wire like that if it blows the skid mark it leaves will have metals in it and can cause more damage
yea, that guy when he showed us the tv working, he was dangerously close to the tv boards almost touching the live voltage.
I do the same thing. I don't like the sparks so i ask someone else to plug in the connector everytime! hahahahah
That power supply is from a Samsung tv, not LG like the title
I had an electronic shop and if I had such a "technician", I would throw him out at once. What a bungler, terrible!
5A , 0.07V = 0.35W on a huge mosfet, so it's not hot. Usually the MOSFETs break because of a bad electrolytic caps.
Thank you teacher for your practical and efficient tips, giving classes, greetings from your disciple from South America.
Hi sorin could you please run some current through one of your "special fuses" so we can see where and how it blows thank you
Sorin repairs become simple the practice of many years is in sight. The difficulty is that still studying its mathematics electronically the passive components, semiconductors and many and many discouragements.
Samsung TV, but LG in title?
Hie sir may your give me the lesson you did on short killer have checked but cant see it
Helpful video 👍
How u check mosfet in multimeter or u check in power supplies
Sounds like butterfly mines, soviet made.
Hello from Croatia, what do u do when there is no datasheet for the mosfet?? Is there any other solution? Can u teach more about driver for mosfet, you were telling about the waveform. Thank U , u are helping so much :)
google MOSFETs then tap images you might find it there and the datasheet.
Help me... I m confused.. how to choose alternative mosfet.
Tried to repair a Samsung PSU today too but sadly a chip was gone and I can’t find it to buy anywhere. So instead replacing of a 3€ chip I have to buy a new PSU board for 80€.... :(
What board is it what’s the model number of the tv I have loads of boards here
mr. sorin use light bulb trick to check weathr the fuse is blowing or not
How Much Money Do You Make For This Repair?
sorin pls make videos how psu and mainboard of tvs work and how to find failures.pls.you make so much for cellphones and laptop,but tvs are not so much.im sure sooo much will thankfull to you
Salutare. Esti roman? 😮
I like the way you run off Sorin, & leave your friend to get a close up of the possible big flash & bang, ha ha, I must try that one in the workshop
Boost FET shorted. Saw that many times in power supplies. Good it didn't short gate to drain. When that happens it usually kills the control IC. Nice work!
Nice fix mr sorin. Like always.
Sir are you ready repair lg 43" led tv?
This is one of the first comments I've written in years. I just had to show respect to the one and only. This man's a god
Yuppi..I like tv repair videos...but come to besiktas...so we can watch besiktas matches Sorin! Be careful at fusable resistors!!!!
Do you know his his shop address
nope I dont sorry...
Use other mosfet leg to bridge (extra resistance) that will be cracked over time, even with heat sink if no new thermal paste
31:00 i wish iam that guy working with Sorin 😞
From now on my wife will be powering on any tv repairs i make 🤣
Come to you my brother from Algeria
Do u know his shop address?
@@SajjadAli-lr2nh no brother
@@dz34 ok
THANKS brother 😊
this was very usefull . thanks for showing.
No scoop needed this time only for reading
Nice to see where the current is going to.
And the components are big
Thank you for the nice fuse replacement 🥴😂😂
To be honest most repairs don't need a scope
Hello, too bad (!) Not the LG (unless they use Samsung boards ?) do you have a video on the alim of the LG (LB550B) ? I understand they may be very similar and I am not that lazy, but so much of a beginner ... Best
Christian is a good sport lol.
Good work great video Sorin love it thank you.
Good job
Good luck 🙏🙏🙏🙏🙏
I have a sanyo fw55d25f that has no power and no lights.I replaced the power board and still nothing.Any suggestions on a fix
LG 42LB550V TV just flashes a little red and does not want to let go we can help thanks
on the same bored the mosfet that was next the shorted mosfet why did'nt you use that one?
Buy a thermal camera
Which was the model of the TV i think i have the same one with the same problem! Thats not a LG 42LB550V (written in video title) it is a Samsung TV
My laptop was not turning on and also my adapter was blinking then
I tried mentioned methods in lenovo forums
I removed battery, removed Cmos connector, then held power button for one minute and then without connecting battery provided a direct power to laptop, it blinked for
But it blinked for a second and then went dead. Then on youtube a guy showed a step "to remove keyboard connector flex and then turning it on by novo switch and it worked. So now keyboard is dead but laptop is working. Is there any way to solve the issue
Kindly help
i have same tv but the problem with mine is it keeps restarting any tips as to what caps or other parts that need changing
apply psu with low amps , then boost up, use heat cam ....
electronic repair my butt
take the drill , and fit a to-247 K****
600V 18A mosfet and enjoy cryptonite repair :) nice video like at all
+1 NİCE repair
I want to learn how to check mosfets properly
GREAT! Don't let us stop you
thats nice if you put more little thermalpaste on mosfet
Hi,
What about when you have a LCD TFT monitor screen whose backlight turns on for about 2-3 s then it shuts off ? 🤔😞
How do you fix that ?
The image is seen on the LCD if I shine on it with my pocket LED flashlight.
I replaced a couple of electrolytic capacitors that were bulged or leaked. What to check next ? 😖
I do have the standby voltage (5,5 V) on the connector (that leads to the logic board) as well as 3,4 V.
All 4 CCFL bulbs are fine.
Thanks !
Best Regards,
You need to check the Integrated circuit led driver...
@@badeadrian Yeah after some investigation I found that the OZ9938GN chip was dead & in fact 2 CCFL tubes were dying. 😶😑😕
Still successfully sold the monitor recently for about 20 €... 😇🤗😄
sir can you make a video regarding COF in led tv that is burn.how to jumper in side COF
I love your videos. I love you guy! You 've got it so much on videos, you could make a weekly tv show on electronics too!
Hello sorin i have already watched all your tutorials and everytime you have new one i always watched them aind i really appreciate them, one thing i notice is i havent seen that you are using solder sucker to remove components to test them if they are short, like that one you just cut the pin if rectifier bridge, i suggest that you use solder sucker on your some next tutorials, thank you very much and have a nice day
Thanks
thanks sir...learn on internet,especially on yutube,like this channel make me became profesional engineer...learn,practice,pactice learn..,..sharing of our knowledge,,,..im an electrical engineer student...thats means its my pleasure....
Thanks very informative hope you can keep it up.
Same board and bridge rectifier first pin cut same 😁👍🤯😁
the best thing ive learned on electronics and its beautifull its the absolute maximum rating law ,, when salvaging parts , we can ALWAYS use More higher rated parts than removed ones
Funny you let Christian plug in. I wanted to see it pop.
31:07 Coward :)
Guys anyone knows where sir sorion work and what is shop address
Plzzzz
I already Miss you! greetings from México.
Good job.
What you said his name is "Krishnan"? from India?
rossman swear
jessa smile
sorin run
Thank you very much for the good video.
This time no shorted cap and no shorted shottky
Learned absolutely nothing
You always replace the fuse... ha ha :-D
That pcb looked cooked, the mosfet was working very hard.
I saw that flag waving on some electronic repair channels 😆. Hello there, guess we have same hobby
Bambo Leo
Yes ive been repairing electronics since i was a kid, but im still thicker that a bankers wallet lol.
There are lots of things i may never fully understand, but that never stops me repairing stuff.
My habit of taking things apart to glean an understanding is still alive :-D
@@zx8401ztv Brilliant. Keep grinding eh. Seems youre way advanced than me lol. Im still new at these things it began about 3yrs ago and im 23 now but should keep open minded for new thing to learn, and here we are with madlad Sorin, the best on yt. Yeah electronic is fun really fun. Cheers mate 👍
Don't forget to replace the fuse !!!
I got a desoldering pump in my first year as a trainee Technician .. Dude, you really need to Google what that is and get one and use it :)
I hate those white glue.