The look on his face is the same as mine after I fix something. The inner pleasure and gratitude after seeing that you have managed a repair, is indescribable. This is the expression of the face of a man who likes what he does more than the money he receives for repairs. It's more than a job or a hobby ... it's a fulfillment to know that something has come out of your hands that will bring joy to the face of others and that you have managed to bring back to "life" something that others would have thrown at garbage.
I remember repairing an audio digital reverb unit when I was in college 30 years ago. The problem was that the unit would run for 10 minutes and then the audio output started outputting this shrieking noise. If you turned it off for 20 minutes it would run for another 10 minutes before shrieking again. I knew this had to be heat related. Since I was in college and therefore had no money for equipment, I used a frozen package of hot dogs from my freezer, and touched each component with the frozen hot dogs. When I touched one of the voltage regulators, the shrieking noise instantly stopped. A couple dollars for a replacement regulator and the $600 digital reverb was saved.
Salaam brother I repair old car radios and stumbled upon you videos. I'm from UK I wish you were here to repair our stuff. Your videos and explanations are complimentary and I just watch for this reason. I wish all the best and wish you much future success.
I have one of those Rosin detector but I didn't know how to turn it on. Thank you so much for showing me that. I just pressed it five times and it's working now. Thanks again bro!
Good day sir Alex, i follow you channel for almost two years now,,i have no comment nost of your video ,the only i had was like and some times i share to my friends, but now i give my comment, i am so much amaze to your video sir,. SIR i wan"t to say thank you for the idea you shared to us, and some of those guide me on how and what. i'm from the PHILIPPINES. Thank you once again. I salute you Sir.
i love to see this kind of thing. you are such a knowledgeable individual, your expertise and skill combined with good diagnosing abilities is why you are so good at your craft. amazing how 1 single bad cap kills a phone like that and for you to find said cap/ problem is just amazing to behold. love your work!
I think the easiest way to deal with that brick is to either smash it with a hammer or heat it up on some parchment paper so it flows flat, then you can break off pieces. That's just my first thought
Just curious. I'm not an expert in this field, and watch for fun. What's the purpose of that removed capacitor as it does not need to be there for the functionality? Is there any backup for it?
He has explained this in other videos. They are filters that work together to protect other ICs. As Alex has put it, "say you have 100 police officers protecting a building, if one of those officers calls in sick, the building is still well protected". Hopefully I got that right.
It is a bypass capacitor. It is there, with many others, to remove any noise that could be present on the DC line. If removed it's not gonna harm a lot of the functionality of the circuit board but ideally should be replaced. It is not because of the crowded area and possibly knocking off the neighbouring components, thus creating more damage and more work to do, to fix it.
As someone already said, it is a bypass/decoupling capacitor. You can also think of it as a sort of local power source near a chip. If a chip draws power in short spikes, having long traces will cause a voltage drop and then a peak as the current drops again, as the traces are essentially like a small coil, an inductor, and the higher the inductance, the more it will resist fast changes in current. So the cap can deliver the spike quickly and then recharge slowly. They can also have different purposes, filtering in conversion of voltages - as many of the parts run on different, very low voltages. These will be near coils and power conversion chips. Also timing, etc. So if there are more of them in parallel, knocking one off will likely not impair functionality, as the design has some "margin", but if it is easily possible, and it's clear that it is on a power rail for decoupling, it's better to put another one (maybe 10nF-10uF, closer to 100n if unsure) in place for stability.
As someone that doesn't understand electronics I have a question. Why does the phone work without replacing the capacitor? Put another way, what is the point in having that capacitor there if the phone can work without it?
Nice. Great work as always Alex. In last week's video i actually commented asking for a flux pen video. With all those components packed so close together i think it is better for these boards. Thermal camera gets you close, but the flux pinpoints the bad part.
Hi, can you make a video about peelable solder mask product like MG Chemical 862-250ML if this product would help SMD soldering noob by covering parts and PCB surface? When I try to fix phones or very small items packed with tiny SMD parts , they often get stick together ! It was so annoying to undo the mass with my crappy setup. You think peelable solder mask would prevent this from happen?
I haven't tried it, but based on first impression, I hate the blinding red light it emits. I don't know if you can hold it or have control on how far or close you can be from the board. or if you can narrow the heat spot rather then burn half the board to desolder one component. With hot air you can increase air speed and reflow a BGA chip using air pressure and see the chip dance, with laser that's not possible. Again i haven't tried the machine, but that's what I concluded based on few videos I watched.
Hey Alex. Is it possible that you can feel the heat with your hand, if you don't have a thermal camera or an atomizing pen? If not can you find the area around ? Also what temperature does the cap reach ?
hi mythical .... I wanted to thank you for the great videos, I enjoy when you solve a problem and you are happy, I am too a question the thermal camera, can you tell me brand and model?.... (sorry my english, i'm a proud italian ;) tk)
@NorthridgeFix: It looks like you are always working with camera only, not using a stereo microscope. Aren't you missing the "real" 3d view this way? I wonder how it is possible to work precise enough this way. Or is it only a matter of experience? So far I am using a stereo microscope, but as I am viewing glasses, it is very inefficient to put them off/on all the time between the different working steps when soldering / desoldering etc.
how do you always get the easy ones.... i have a bunch of boards that are simply NOT chargin ... replaced everything , tigris hydra caps u2 coils, either not charging at all or only charging when off ... big headake ...
all voltages are fine ... everything measured is fine, the q's also fine ....WHAT is wrong whit those boards ... WHAAAAT !!! some iphone X ...same issues.. charging only when off
designed to short over time so you'll buy a new iphone manufacturers are using engineering and design to add "failure" at a specific time instead of designing things to last long.
caps are always under load, like anything else they start breaking down and fail over time kinda like a lightbulb....as for why one would fail before another it could just be due to manufacturing tolerances but its better to not look that deep into it
Usually mechanical damage due to thermal stress. This is a very typical failure often seen in automotive electronics they usually install two capacitors in series’s for critical items such as Avionics
It can stay out, as is is a bypass cap. It is meant to filter out noise (works like a flattener). There are some of them, so one cap lost will not break the system, the filtering is still good enough. Some lower farat caps in parallel work better than only one bigger cap. But if you have 4, 5 bypass caps, and remove one, it usually is still good enough for the device to work properly.
The look on his face is the same as mine after I fix something. The inner pleasure and gratitude after seeing that you have managed a repair, is indescribable. This is the expression of the face of a man who likes what he does more than the money he receives for repairs. It's more than a job or a hobby ... it's a fulfillment to know that something has come out of your hands that will bring joy to the face of others and that you have managed to bring back to "life" something that others would have thrown at garbage.
That’s what I want do that someday.. lol
it's nice to see someone enjoying their work, every time the device is repaired you have a smile on your face, ..........
Always good to see a person look pleased with their success. Well deserved.
A man who enjoys his work. I wish I liked my job like that. I lived in the area I look you up. I’ve worked in a few labs. That rosin sprayer is crazy
I remember repairing an audio digital reverb unit when I was in college 30 years ago. The problem was that the unit would run for 10 minutes and then the audio output started outputting this shrieking noise. If you turned it off for 20 minutes it would run for another 10 minutes before shrieking again. I knew this had to be heat related. Since I was in college and therefore had no money for equipment, I used a frozen package of hot dogs from my freezer, and touched each component with the frozen hot dogs. When I touched one of the voltage regulators, the shrieking noise instantly stopped. A couple dollars for a replacement regulator and the $600 digital reverb was saved.
That would have felt amazing.
I envy you because back then components were bigger.
The way this man smiles each time he fixes stuff even doing it for many many years. Wish i had a job like that still looking still looking
Salaam brother I repair old car radios and stumbled upon you videos. I'm from UK I wish you were here to repair our stuff. Your videos and explanations are complimentary and I just watch for this reason. I wish all the best and wish you much future success.
I have one of those Rosin detector but I didn't know how to turn it on. Thank you so much for showing me that. I just pressed it five times and it's working now. Thanks again bro!
Good day sir Alex, i follow you channel for almost two years now,,i have no comment nost of your video ,the only i had was like and some times i share to my friends, but now i give my comment, i am so much amaze to your video sir,. SIR i wan"t to say thank you for the idea you shared to us, and some of those guide me on how and what. i'm from the PHILIPPINES. Thank you once again. I salute you Sir.
The thermal camera really picked up the short pretty well I could count the capacitors to the shorted capacitor
you make other repairmen feel better and encourage to learn more.
Hi Alex, I have used IPA in a similar manner to expose the hot part. The IPA evaporates quickly off the hot component.
IPA is a much better method.
"say hello to my little friend" that makes u fix so easy from now on , funny reference of the automizer tho !
I Do like the Smile On your Face When you finally Fix Something.
to be honest it makes me motivated, just like when i fixed the tv Backlight.
i love to see this kind of thing. you are such a knowledgeable individual, your expertise and skill combined with good diagnosing abilities is why you are so good at your craft. amazing how 1 single bad cap kills a phone like that and for you to find said cap/ problem is just amazing to behold. love your work!
This video helped me repair a phone, i like what alex does, and very educational
Thanks Alex another nice little trick with the Rosin !
great to watch alex .... precise as ever ....
Alex it’s Saturday ffs. Get some rest big guy. Don’t burn out like I did lol. Have a great weekend buddy.
@@ElGreco365 I don’t understand what you mean bud.
thank you uncle greetings from tangerang Indonesia
that's a new one..."say hello to my little friend"... priceless. another repair done.
6:00 THAT is so cool, never seen anything like it. Awesome man, just awesome 👍🏻👍🏻
I think the easiest way to deal with that brick is to either smash it with a hammer or heat it up on some parchment paper so it flows flat, then you can break off pieces. That's just my first thought
@@smokeskull I think they are talking abut the rosin.
@@dylanevans5644lmao
wow that atomizer trick is amazing, thank you for sharing!
“Say hello to my little friend”. Always with the scenarios.
Congrats on another iPhone fix Alex 🤜
Just curious. I'm not an expert in this field, and watch for fun. What's the purpose of that removed capacitor as it does not need to be there for the functionality? Is there any backup for it?
I was going to ask that. So just removed it, no need to replace it?
He has explained this in other videos. They are filters that work together to protect other ICs. As Alex has put it, "say you have 100 police officers protecting a building, if one of those officers calls in sick, the building is still well protected".
Hopefully I got that right.
It is a bypass capacitor. It is there, with many others, to remove any noise that could be present on the DC line. If removed it's not gonna harm a lot of the functionality of the circuit board but ideally should be replaced. It is not because of the crowded area and possibly knocking off the neighbouring components, thus creating more damage and more work to do, to fix it.
@@MrLukxas thanks for the info buddy
As someone already said, it is a bypass/decoupling capacitor.
You can also think of it as a sort of local power source near a chip. If a chip draws power in short spikes, having long traces will cause a voltage drop and then a peak as the current drops again, as the traces are essentially like a small coil, an inductor, and the higher the inductance, the more it will resist fast changes in current. So the cap can deliver the spike quickly and then recharge slowly.
They can also have different purposes, filtering in conversion of voltages - as many of the parts run on different, very low voltages. These will be near coils and power conversion chips. Also timing, etc.
So if there are more of them in parallel, knocking one off will likely not impair functionality, as the design has some "margin", but if it is easily possible, and it's clear that it is on a power rail for decoupling, it's better to put another one (maybe 10nF-10uF, closer to 100n if unsure) in place for stability.
As someone that doesn't understand electronics I have a question. Why does the phone work without replacing the capacitor? Put another way, what is the point in having that capacitor there if the phone can work without it?
Capacitors can prevent voltage spikes
all that cap does is filter the voltage, think of it like the filter on a pipe, if you remove the filter water still flows
Nice. Great work as always Alex.
In last week's video i actually commented asking for a flux pen video. With all those components packed so close together i think it is better for these boards. Thermal camera gets you close, but the flux pinpoints the bad part.
I work with rosin sometimes as well, but I use a quartz bucket and a torch
I learn lot from you Alex. thanks for your videos 😊
Wow great fix and use of tools
That's a very novel use of a concentrate vaporizer!
Thanks I really appreciate and I love your work... Please where will I get the short cable.
The Satisfaction is great!!! Nice work
I like see your video for go sleep , very nice video again thank you very much ,
Nice regards
Rémi from France
Hi, can you make a video about peelable solder mask product like MG Chemical 862-250ML if this product would help SMD soldering noob by covering parts and PCB surface? When I try to fix phones or very small items packed with tiny SMD parts , they often get stick together ! It was so annoying to undo the mass with my crappy setup. You think peelable solder mask would prevent this from happen?
Thanks for the tip on getting rosin for the pen. I tried breaking it but wasn't successful. Will use the heat gun as you did next time!
Alex invest in new ESD mat imediatelly 😂😂😂. And great work as allways
Nice. Keep Smiling.
excellent diagnosis!!!
@ NorthridgeFix
Mabye you can melt more onto a flat surface and brake it in to peaces so you dont have to do this everytime you want to use it.
Thanks Alex for the video, I am just wondering if you heat the flux brick and then pour the flux liquid into the atomizer, wouldn't that be easier.
The thermal cam is a great tool
I love to see a master at work....but what do you think caused that cap to blow in the first place??
TA DAAAA 😂 love that ending 👌🏼
Hi bro can you tell me whic brand microscope and camera you are using Thank you
Feels good once you get Repair Work Done
Awesome job bro keep rocking bro 👍👍👍
I see on the market is new laser soldering station, did you have experience with it or did you now something about this new technology
I haven't tried it, but based on first impression, I hate the blinding red light it emits. I don't know if you can hold it or have control on how far or close you can be from the board. or if you can narrow the heat spot rather then burn half the board to desolder one component. With hot air you can increase air speed and reflow a BGA chip using air pressure and see the chip dance, with laser that's not possible. Again i haven't tried the machine, but that's what I concluded based on few videos I watched.
Very nice...awesome job. Thanks to the atomizer. After this success you have time to relax and enjoy the moment. Thank you for that video. Greets
Took the phrase pass me the rock into a new lvl
Hey Alex.
Is it possible that you can feel the heat with your hand, if you don't have a thermal camera or an atomizing pen?
If not can you find the area around ?
Also what temperature does the cap reach ?
Good job
You're good at it.
how do you know how much voltage to apply to that shorted cap or any other line for that matter?
Hey man wassup. I have a dell g7 that id like you to look at. What are your standard repair price so i can have an idea of price range to fix it
About what percentage of fixed devices you think you have?
Hi. do you work on iphone sandwich motherboards? dual layer?
Awesomey Job ALEX!
Great work. Hopefully I will be as good as u 1 day
Thanks great fix and use of tools
haha cute at the end tadah.. well done super man of electronics my brother
That smile at the end :D
Very good job 👏 👍 👌
You are the best, your face is something :). Thank you for inspiration.
Awesome Job💗
Amazing content, well done. :)
mitico ...come sempre!
You are the best man
Mashallah Mashallah so gifted
Was the capacitor replaced or just removed ?
good job mate.
Sir, what is that switch you use to switch between cams??
That's really interesting but I'm wondering why you didn't just use alcohol
Only in California are you going to use a dab pen to fix an iphone. Always fun watching!
You are gold!
Good job bro! الله يبارك
I prefer my higher resolution thermal camera instead. Easy to see exactly what component is hot, even down to tightly packed 0201's.
hi mythical .... I wanted to thank you for the great videos, I enjoy when you solve a problem and you are happy, I am too
a question the thermal camera, can you tell me brand and model?.... (sorry my english, i'm a proud italian ;) tk)
Good job 👌👌👌
hello Alex, i have been learning a lot watching your videos.
How much voltage do you usually inject?
Thanks
1.2V the VDD for apple chips
what mic does he use?
Perfect
Thats amazing, ive never seen that done before 👍😀
@NorthridgeFix: It looks like you are always working with camera only, not using a stereo microscope. Aren't you missing the "real" 3d view this way? I wonder how it is possible to work precise enough this way. Or is it only a matter of experience? So far I am using a stereo microscope, but as I am viewing glasses, it is very inefficient to put them off/on all the time between the different working steps when soldering / desoldering etc.
th-cam.com/video/NfkXitg5R4I/w-d-xo.html
avery time you remove a short looks like always the first time ahaha nice
This is probably a dumb question but why does a capacitor heat up when it has a short, and not the areas everywhere the current goes?
For a moment I thought it was thc resin and a vape pen 😂
nice Vedio ☮️👍
This is amazing tip
grade THX for the video
Did u replace it…? 😳
Watching master!!!!!
It looks very simple when you are repairing stuff.
always the best 👍
how do you always get the easy ones.... i have a bunch of boards that are simply NOT chargin ... replaced everything , tigris hydra caps u2 coils, either not charging at all or only charging when off ... big headake ...
all voltages are fine ... everything measured is fine, the q's also fine ....WHAT is wrong whit those boards ... WHAAAAT !!! some iphone X ...same issues.. charging only when off
No need to replace the capacitor?
question is, how do these solid capacitors just short itself out over time?
Maybe the material is not good enough, so the capacitors are degraded over time by heat from processor.
designed to short over time so you'll buy a new iphone manufacturers are using engineering and design to add "failure" at a specific time instead of designing things to last long.
caps are always under load, like anything else they start breaking down and fail over time kinda like a lightbulb....as for why one would fail before another it could just be due to manufacturing tolerances but its better to not look that deep into it
Usually mechanical damage due to thermal stress. This is a very typical failure often seen in automotive electronics they usually install two capacitors in series’s for critical items such as Avionics
Do you replace the cap? Or leave the motherboard without it?
Same question I have. It just works without it? What's the point of that capacitor, then?
It can stay out, as is is a bypass cap. It is meant to filter out noise (works like a flattener). There are some of them, so one cap lost will not break the system, the filtering is still good enough. Some lower farat caps in parallel work better than only one bigger cap. But if you have 4, 5 bypass caps, and remove one, it usually is still good enough for the device to work properly.