Just waiting for the video starting with "Hello, Finally Friday!" Thanks for the classes, from RJ Brazil!

I love the thermal monitor that Sorin used to troubleshoot! Got burned myself multiple times using it.

you forget to replace the capacitor near the Hdd!

you really know your apples!! i love the way you talk to us?.....''Explain that?'' lol. it pulls me into the video, and makes me a part of it. your experience shines through..... good stuff

"Everytime you apply the same rules. It's electronics", Sorin

8:24 that is part of a buck converter circuit.. The switching regulator is underneath that capacitor SMD component. Remember this power supply outputs 3 different voltages 3.5v, 5.5v and 12.5v. On a oscilloscope you would see the power wave dropping in and out which Dc circuit don`t like. I fixed many Panasonic products they always fail on them circuits as their always on even when you switch it off their on....

@IFIXCASTLES

3 жыл бұрын

The failed caps probably said panasonic on them Hahahahahah......

We need more AMPS!

What about the other blown cap that isn't on the power supply?

@gcfixitc9283

3 жыл бұрын

ditto?

Great job M.r

Sweet More vids for gathering data on repair was the cap between the HDD and that driver board changed also? didnt see?

thanks

I've never seen a switchmode do that before, most just boil the capacitors or kill the driver mosfet. The odd one kills the output rectifiers.

1440p video! Thank you :)

i do not know the schematic, but as you said, something is switching and because of that could be a buck-boost converter probably, and because it has a coil there, in parallel or in series, depends on how the circuit is and how the voltage it is raising...

When repairing anything, if you see swollen capacitor you just replace it. Many times, it will fix the issue, and saves time diagnosing.

Have seen a few of these 'DMR' series machines at Repair Cafés - the 'please wait' screen is infuriating when it just sits there flashing endlessly :D - one of them was fixed with a cheap repair kit off eBay (a few capacitors and a DC-DC IC on the main board) - the PSUs in these things are ropey it seems!

Maybe a diferent level of ground is showing a higher voltage drop on the multimeter. Or even a low negavite voltage measured across with the positive one.

Talk about voodoo, I am sitting next to my dead Panasonic DVR and it is the EXACT same model with the EXACT same fault... and the exact same two capacitors failed... haven't tried the 12 volt injection though to see if it generates the extra 300mV... spooky... o_O Thanks for the video, very useful ;)

master electr in my life

it's a flux capacitor Sorin, you didn't know about those? ;)

@electronicsrepairschool

3 жыл бұрын

Of course i know www.imdb.com/title/tt0088763/

Would be nice to see scope readings of the 12vdc to see how a bad cap affects smoothness. And to know uf and esr of bad cap.

Extra voltage due to being local to a coil ?

g`day i have one of these panasonic dmr -xw385 and the tuner stopped working the other day can you still get spare parts for them this is a hobby for me would a novice be able to change out a tuner ?? i am still at a very basic level cheers james D

Dont you use the power supply test kit you bought or got sent? you did a video showing how you liked it but ive not seen it since?

multimeter set to measuring dc. with bad cap there is ripple in voltage that get smother by capacitance o leads so dc voltage rise

12v stored charge from when you had it plugged in.

ESR meter would come handy

Excellent repair! Two really bad caps. Those esr is very high.👍

Why is the allowable capacitance range so variable on the PWR SUP?

HELLO SIR. i just found your channel , i have a problem with my hp laptop, the led beside the charging port is good but when i try to boot up their is no sign of life no fans no beeps just the led light beside the port. please can you help me what might be the problem? sorry for my bad english.

it's weirder that you keep checking for the right voltage knowing that there's a bad cap in the circuit. would it be the reason why you get an incorrect voltage because of the bad cap?

19:52 i don't know why we always check the temperature of the soldering iron with our nose it's a strange habit and in spite of the repeated burns we keep doing it 🤣🤣🤣🤣🤣

@Skarz289

3 жыл бұрын

كثير بكون مبسوط لما اشوف عرف هون .. منور اخوي خالد

@gorjy9610

3 жыл бұрын

I guess because it fastest way to check, you feel it right away. Even with hand it will took few seconds and usually other hand already doing something else at the time. And nose just sitting there doing nothing so why not use it as temp check :D

@kahlid-ataya

3 жыл бұрын

@@Skarz289 تسلم يا غالي

@jimdavis6833

3 жыл бұрын

I don't. My mama didn't raise any fools. I won't remove my comment because from an early age my Mama always taught me that to assume the stove was hot. She also taught me that irons standing up on the ironing board were to be assumed to be hot and not to be touched. I grew up with that notion. I was raised to not be foolish, but to be careful. I'm not going to test a soldering iron with my nose. I test them with solder. Sorry, but I would call anyone sticking their nose on a soldering iron foolish. It's not something a sensible person would do.

@kahlid-ataya

3 жыл бұрын

@@jimdavis6833 it's shame on you to say that We are all brothers here And we aren't fools for doing so Please remove your comment

Its the capacitor making voltage higher 😂

Morning sir,I have issue with a Samsung note book motherboard.the laptop is charging but not powering, 3.3v is present in the bios and super i/o but it is not present in the power button.pls tell me what to do.thanks

more tutorial on elco replacement please, im curious about the rules for the different value

@gorjy9610

3 жыл бұрын

There is no rules except one - never go with lower voltage cap. Capacity is different story, almost everything have wide tolerance range. So you can go lower or higher but try to stay in reasonable range. What's reasonable? Hard to tell, I stick with 20% without single problem in entire life but maybe even more is ok. Especially with SMPS and similar, linear audio equipment probably have more narrow tolerance range.

@PrasetyoMuhammadDwiBiology

3 жыл бұрын

@@gorjy9610 thank you for your rich and humble explanation sir. Have a good day

@gorjy9610

3 жыл бұрын

@@PrasetyoMuhammadDwiBiology I miss important note - what I say apply to electrolytic capacitors and large MLC caps) on power rails, in other instances like any kind of oscillator, switching circuit etc. can have big impact on switching frequencies. Some will just change some minor things. In this video he replace that one small cap on high side. It was 35V cap so 35V on high side can be only some kind of bootstrap capacitor, nothing else. With less capacity SMPS will start sooner than with original one (voltage will rise faster), if capacity value is too low PS will not start because IC doesn't have enough power to start switching. In this case it start normally so he's good but when capacitor loose some of it's capacity due aging maybe it will be a problem. But probably at that time this DVR will be electronic waste anyway. Some knowledge about purpose of part you replacing in circuit will help you a lot to choose right value. Most of the time we don't know so we stick with original value as close as possible, not everything is simple as most SMTPs.

Cool...

Check with a scope and you'll discover many answers, many things! Thank you!

👍👍👍👍❤️❤️

you didn't explain why it's ok to replace a capacitor with higher capacity than the original

@srdjankrpic8036

3 жыл бұрын

You can replace capacitor with a little higher capacity, it has tolerance...

@Radek__

3 жыл бұрын

it depends where that capacitor is. if on the last place, where the output is, then you can use twice or even third times more capacity. but some other places required sometimes critical the same value. some of regulator requires very critical value and if is below or above it will not start producing voltage. You can think in this way - the factory will always use the absolute minimum capacitance to reduce production cost. they don't do things, which are not necessary. So sometimes when you use more capacity it will give you better, smooth output voltage. but you cannot put 10 /20 times bigger cap because each capacitor when it empty is making short until you fill it / charge it. so when you apply voltage to power supply-it will meet short there for very short time, until cap will be full, so very big capacitor can destroy weak power line that is why for example when you have very huge capacitor for car audio which is long as your whole arm and has capacity 1000000 uF, you cannot connect it directly to the car battery because you will experience huge sparks and sound explosion, because it makes short on the beginning. you have to charge it /fill it via /trough light bulb connected in series, then capacitor will slowly fill /charge and then when its full it stops making a short, so then you remove bulb and you can connect safety capacitor straight to car battery I've explained it to you in easy way, I don't have a time to discus whole aspects of capacitors. And about video - I disagree with his practice to replace caps with any value which he pick up from the bag randomly.

@Skarz289

3 жыл бұрын

@@Radek__ Thank you for taking the time to explain i really appreciate it

👍👍👍👍

I sure hope you replaced the last blown cap close to the HDD as well - would be very unprofessional to just leave it there. Also goes to show you should always start with the most obvious fault possible - replacing visually dead caps.

maybe impendance matching

Hello sir How are you..

Lol good ! 68uf good is 47uf

Self Powered DVD...lol

Please do hp dm4 ded power laptop

8:28 perhaps that is possible beacause some kind of inductor creates big voltage spikes that are getting smoothed in capacitor., which can be cause of that spark you hear when you turn on a deivce or cause of these blown capacitors. [ this is written before watching video till end ]

sometimes oscilograph can help

PERPETO MO-BEE LE

you not going to fix other bad cap

Voodo Cap

Perpetual mobile device! Lol

Sorin... Smd microscope for the subscriber waiting.. help in need

those aren't manufactured anymore. The unit is completely useless today. I'd just take the HDD out and the rest throw away

@gorjy9610

3 жыл бұрын

Didn't look on this one in video but HDD in my old LG one was extremely slow drive made for longevity and silence in mind and no performance. I can only guess this one use something similar so not very useful with prices of newer much bigger HDDs in mind. Devices can still be used with STB for recordings of F2A, not everyone have some iptv with recording option and I guess owner of this one do so.

3rd

5th 😁

2nd

1st

It's a flux capacitor!! you were meant to send that crap back to 1985... you know, the moment when the timeline skewed into an age where these pointless pieces of shite were destined to be produced. lol

23:58 But WHAT about that last swollen capacitor on the logic board side 4:29? WTF man? I know that you are lazy sometimes, I know that shop doesn't have free time for work above what is necessary, but what kind of repair it is, when you see clearly broken/bad capacitor and you left it? Because access to it is not easy? You know very good, what kind of symptoms/issues that bad capacitor can do on the logic board. Whole system can be unstable or can randomly hang-up. You know this, that this is possible, but you left that cap at it is. You spent 15minutes for fun with the power supply, and for that bad capacitor you doesn't have time anymore I don't' understand this.

@einfelder8262

3 жыл бұрын

I agree completely.

@laboratorioassembler

3 жыл бұрын

Yep.. and when i work in "economy mode" .... i just pull off capacitors from this side and place new ones soldering legs on old legs...

@raduionut8778

3 жыл бұрын

He maybe forgot about that one

@Radek__

3 жыл бұрын

@@raduionut8778 I don't believe it. it is not the first time when he left something :-)

I am having problems understanding your English! Its hard to follow through your repair work. Try putting up captions!

@electronicsrepairschool

11 ай бұрын

Captions are there, you just need to enable it

@lox_5017

11 ай бұрын

@@electronicsrepairschool what country are you from?

thanks