today another one is sitting for those who repair electronics or try to repair chickens electronics, so to speak, or at least just trying to delve into this interesting business somehow right away that this video will be useful to everyone, even to those who have been professionally repairing for quite a long time, I have been doing quite a lot and that's all equally often I use this method because it is very simple, it is very easy to find a defect in our equipment with practically no instruments, if anyone does not know, then the most unreliable part that is in our electronics is electrolytic capacitors, everyone who is repaired a lot, but I thought they would agree that the box that they accumulate you are not soldered and water parts, then most of them are capacitors, namely electrolytes and the same microcircuits semiconductors and there transistors are triacs, then this is already very few resistors, as a rule, even less, but the mountains of their capacitors accumulate, we will continue now, but you will not forget to subscribe to anal in order not to miss the same interesting and useful video, so we will look for this part that is not working, well, one of the methods is to solder this part to check every time, of course, there are Chinese testers, especially which, as it were, is advertised that you can not use it, I check this part, but not always this can be done because in some cases the internal circuits shield the measurement of this part and you won’t exactly determine why it shows incorrectly, whether let’s say some other parts interfere, the same resistances are obtained or something else, and this method will just give a pretty good check all schemes for performance, we will not start a little with the theory by which method it all works to show the measurement principle itself, I will use such a Chinese tester for a new one, it will not be needed because on it we will only look at the theory itself how it all works and let's take some capacitor, I will take a known-good capacitor, this is 22 microfarads, but here it shows 20 whole 65 hundredths of a microfarad, also if we look at the graphs, we can see that her sir changes in temperature, then who doesn’t know this is the internal resistance of the capacitor, it decreases in temperature, but the capacitance, if you warm up the capacitor, it starts to increase, of course, you need to warm it up within reasonable limits, you don’t need to bring it to a boil because that, as you know, on the tip of the soldering iron, the temperature can be from 200 degrees, as a rule, and even higher, they even reach 300-400 degrees, if you wind it up especially at the soldering station, these graphs just show us that if we wake up the capacitors, then the indicators we need are internal resistance and the capacitance will return to normal, for example, I took the working capacitor first and let's do a few experiments on it, I will warm it up and you will see what happens to its resistance and what happens to its capacitance and the same said, you need to warm it up reasonably with the corner of the soldering iron, touch and warm it up so that with the temperature o did not exceed 70 80 degrees, this is the allowable norm for it and we look at what is happening on our device display, you already see it has risen by one microfarad and the resistance has decreased, and since it is clear from these experiments that even the working capacitor still recovers a little, it reacts to warmed up with a soldering iron, its capacitance increases, you see, I touch the capacitor not boiling water with my hand, you can calmly hold on to it, it became as if hot, but you can keep it for a capacity of 22 and the resistance has dropped even less, who does not know that the lower the resistance, the better it is for the capacitor, but again, in within certain limits, each capacitor has its own tolerance for each more precisely the capacitance and the voltage has its own tolerance for this internal resistance, we see the capacitor recovered although it was working, but still its parameters have improved, and now let's look at the non-working capacitor part, I will pick up some and we will see how it will behave completely non-working me there are boxes of which I throw off the details, hundreds of them accumulate there in a short period of time, as I already said that for the most part these are capacitors, I will now choose some and we will continue to conduct experiments, and so I picked up a 100 microfarat capacitor, we are checking that we are shown a measured capacitance of 45 microfarads of resistance 150 mm, this is already it’s like a very very large resistance to a capacitance half as low and let’s now I’ll also start myself when you look at this capacitor so that it’s clear how sharp it is and now let’s continue, I take a soldering iron and start his speech what it will give us now we will look at the display of this device, I think that it’s enough to warm it up and you can keep everything normal, it’s not overheated and we observe that resistance 047 microfarads has occurred and the capacitance has increased to 104 microfarads, as it were, restored to its value when it was a new capacitor, well, what is it all about says that we slightly warm up the capacitors with a soldering iron, we can restore them for a while, as a rule, under where it is warm, it will keep it all, as it were, their parameters, sometimes they are even restored and, after cooling down, continue to work for some time, well, we, as it were hack to restore for a while we don’t need all this to find a worthless part using an example I will bring the same tuner some kind of defect has appeared you cannot determine whether the signal is pouring garbage or some kind of interference has appeared look at the swollen capacitor circuit there is nothing to do and let's warm up the capacitors in turn looking at the screen of the same TV if you are of course a plus minus you understand their circuitry, you can look at the circuit immediately to understand which part will be responsible for this signal, but if you don’t understand much, then warm up each one in turn, the main thing is not to skip and don’t overheat the capacitors especially strongly, you will see everything on the screen from the image if for example there was an image in the cube, heat the relay, the relay, and the cubes began to decrease or disappeared altogether ; it will work because as you can see it is quite simple for me and as I said that I have been using it for many years now try it I think you will like it, and if you liked this video, do not forget to share it and like it, and if you have not subscribed to my channel, be sure to subscribe and also write in the comments whether you did it all yourself or not, and on this I will end everything Happy viewing and see you soon
