Free mobile Repairing class 4What is Diode | Diode Kaam Kaise Karta ha
Assalam Alaikum, I hope all my friends are fine, it has been a long time, the series of classes that we started is a little late, but the video was a couple of videos that we have uploaded, so what is the next task for you? Don't miss anything, then it means that you ask a question or ask something, then it is that when I try to tell you what is in the video in full detail, God willing, we will not discuss what the video is in full detail . How can you check it inside your mobile and what are the things you have to keep notes to check or understand the diode, you have to understand all the things that are proper so that what is there is easy for you to work on it, then the symbol used by the diode is the symbol inside the diagram, you must remember the diagram as if you want to learn the diagram, reading or If you want to understand the diagram, you must remember its symbols. This is the symbol of a diode. If you have a diode installed in your mobile phone, and when it is shown in the diagram , this symbol is used or not . You have to keep a careful note. Like you were told the symbol of the capacitor and the coil, you were also told the symbol of the inductor, then the resistor, and the symbols of all the components. If you want to remember, the next component is our diode. The diode that you see looks like this. I will show you the shape of it. Look, this diode will look like this. Inside the mobile phone,
it means that their shape has also changed . You always have cathode and cathode means minus and the other end is positive and it flows current from one side only or current can pass through it from one side only these things you have to look carefully and understand and also this thing you have to understand very carefully that what is in it does not have positive negative uses which are word uses. Its positive side is called Anode and its negative side is called Cathode Anode and Cathode So these are all the words you have to keep in your mind if you want to understand these things properly then you should know all these things Anode and Cathode This is its positive side Look at the side that has a line, this is the Cathode and what you see in the diagram This is the side of the cathode, meaning the negative and the positive. You have to understand and see all these things very carefully. I have also made a symbol for it. I have also made a sign that this end, which is not the anode, has become the positive, and the cathode has become the negative, and one more thing you should note is that the cathode is here. If the word is used, then it is used, but in writing, it is the cathode, but the word that is used is AU for the anode, and K is used for the cathode , but what is used for writing is the cathode, it is other than the types that are used in your PCB, it has a Zen diode, a TVS diode, a rectifier diode, but this Inshallah, as soon as you watch the video, you will understand everything properly. Inshallah, I will try my best
to make you understand all these things properly, so once I just want to show you how it will work if your diode is connected in series, see this. It is connected to a line. We can have any voltage in it or as many volts as the diode. No, it is also a volt, you can't measure it like that, but the thing is, you can't understand what it is or know how many volts it will be as a diode.
According to this calculation, it will work and how it will work. They are told to you at the same time, Inshallah, and this is what it is, isn't the zener diode installed? Your Zener diode, what is it, is it in parallel, and what is it, is it in parallel, and what is it ? All these things are not meant to be used. Basically, what is the function of this? If five volts come from here, see if this diode is five volts or not. See, maybe it is also a mansion. And O, which is its anode, it is connected to the ground and its cathode is connected to the positive. So basically, what is forward bias or reverse bias, how does it work?
You have to note that it is understood that the positive If it is connected to the positive, then it is forward bias and if the positive is connected to the negative, then it is the reverse bias of the diode. It means that it is the cathode, but the line is the positive. If it is connected to the charging section, it is a zener diode. If they are not saving the charging, they install a diode to save the charging. The phone is connected to a zener diode. The zener diode is connected to the reverse bias and its cathode is connected to the positive of your device, and its anode is connected to its ground, so it becomes reverse bias. If it is connected to the positive,
it will short. Because the anode and if it is positive and its anode is positive, then it will be forward biased for it, meaning that voltage will come from here and will go to ground, meaning because it will block the voltage, why not because what is for it, this line is not positive, and if you put it in forward bias, it will damage what it is and cause a problem because it will make it the voltage inside. It will not cross and all the voltage up will be connected to the ground, which will short your circuit. You have to understand and watch these things very carefully. Basically, if it
is a five volt diode, then if five volts are coming from here, then it has so much power that it will not allow this five volts to cross from within itself because it is connected in reverse bias and five volts of five. What you have will not go to your load, then if more than five six volts have gone, five and a half has gone or some amount of voltage has increased, then if it is working, it will work. It means that if five six volts have gone from here, instead of five volts, then this is basically a diode. By reducing it by reducing it, the upper volt from inside it will ground it, and the five volts that you have will go to the load of the proper one, so it made you understand that it is also connected for protection in reverse bias. Isn't it like this the symbol which is not made by you, see it has become positive and that which belongs to the diode has become negative, that means it is positive and this is negative, it is reverse biased for it, and the ground here is negative, and this head of the diode is positive, it is anode, so what is it, it has become reverse bias for it . The TVS diode is also used for protection, so look at this. This is its diagram or symbol. It is used like this and its function is almost the same. It is used for protection. It is also
used in your mobile. Apart from that, it is an LED light emitting diode which is lit for your notification. There is a small light inside the mobile which is used for protection. There is an indicator , that is also your diode. Basically, it is called a light emitting diode, and its graphical symbol will be this. It
will be placed here in the diagram. If it is above it, the two small arrow marks will not come, then it will be your light emitting diode, which means LED. If you want to use or understand all these things, then you need to know what the meter is like. As much as the checking is done inside your mobile phone, 90 percent of what you do is in your reverse voice . When you check any line in diode mode, it is basically called reverse bias because the red wire is connected to the ground and the black wire is connected to the point where you want to check .
I know, I told you that the ground will be connected to the ground and the red one will be connected to your ka, so it will be your forward bias , so if we look at it, we have made a diagram in it. The voltage that will be brought from here will cross from here and go to your load. If we put it in reverse, it will be negative here and it will be positive here, then it will be reverse bias . I made a little animation here. Check it out. It's forward bias , so whatever the voltage from here, all the voltages will come out of the diode and go to your load. If it is connected in series, then it is almost connected to the light section and in addition, if you check in the reverse bias, then tell the co-op to see what its function is . Next is the circuit. Basically, this is its main function. It is a zen diode. Its function is to protect. It means that it is being used for protection, and its function is that if there is more than that, if it is a five-volt diode , then it will allow five volts to pass through it.
It will do it and if it is a diode of as many volts as it is, it will not work as it is. If a diode of four volts is installed here, it will only allow four volts to go forward. It will not allow the fifth volt to go forward. The checking will be done in your mobile, it is basically in forward bias and in reverse bias. After that, I have made another diagram in which I want to tell you that basically, if you had told you from the voltage of AC, what is AC is alternating current, the electrons of your negative and positive are the same, it means that these two electrons are present in both the face and neutral. If we want to separate it or understand it or how to separate it and make it DC voltage, it is not our job, but for your knowledge, I just want to tell you what these things are, so that you understand them .
You will check up in the diagram and you will see that the sign or symbol of it will be like this, and what is there, look here, it has become positive, and look here, its minus, which is not its cathode. If it is connected, then the path here becomes reverse bias for positive, and if you bring positive electrons here, then this path becomes forward bias for him. It means that you can make them from AC to DC, for example, if you plug your charger into the power supply, then the charger has 220 volts , which is your AC voltage, so what is it ? Isn't that your anode from here, pay attention, let me explain to you, here is a positive electron, a negative, positive, negative, positive, negative, positive, negative, that means that all the voltages, both positive and negative, will come here. If the positive
electrons will come here, if they come here, it will be reverse bias for them, if they go here, it will be forward bias, then the positive electrons will come out from here. It will go forward bias, it means that it is negative and this is also negative, so it will come out from here, the positive will come out from one side, and the negative will come out from one side, which will become the DC voltage, but the DC voltage cannot be created in such a circuit . Just to explain to you how your diode works or how you can convert it from AC to DC voltage, if you want to see how it works, then you just have to look at these things that I have told you . If the forward bias is forward bias positive, if the positive is replaced by your diode, then it will be for his diode . I have to try to understand what is in a big way so that you people can understand these things properly because all these things are very important, there are still many things to tell you, but this is that I think it was very important to tell you these things so that you understand all the things that are installed in your V-Bus line. Basically, it is installed for protection, just like the capacitor is for protection, and it also has its functions, similarly, the inductor is also used for protection, and it has many other functions.
Likewise, all the components have different functions . And in this, you only have to note one thing, which is the forward bias. If this diode is lying, then in this diode you have to see that it is done. Instead of the cathode, you have to put the black wire in place of the cathode, and instead of the positive, you have to put the red wire in the place of the positive. In this way you will check if it is correct or not it will become forward bias for both of them so your diode will show the reading if it is correct and if you check it in reverse bias. It means that you will put negative instead of positive and you will put positive instead of negative, then your current diode will not show any value, so all you have to do is check, this is the procedure, you can check it easily in this way.
Yes, four thousand, three thousand, 2500, it also means that it is OL, meaning it is negligible. If it is above a thousand, then if it is yours, then you can accept it as well. In addition, if it is damaged, it is from both sides.
If you check it in reverse voice , it will still be OK. It can also be shorted. It means that there are some things that you have to pay attention to and you have to check all the components properly on your motherboard. If you want to take a video of checking on it, then please let us know about it. Inshallah, I will make a video of checking it, or is it that as we move forward, we will read the next component or something. If you will see it further, I will try to tell you what is there and how you can check it, but it is so long and wide, it is a discussion, no, there are many tasks, but it is that if you check it in the way I have told you, inshallah, I am hopeful that you will understand what it is.
I have also noted some things in it. Party and OK conditions . If you will see, I have written all the things in it, so you can check it on the motherboard, how can you check it on the motherboard, how can you check it by removing it from the motherboard, all these things have been noted, so you have to see all these things, God willing, you have to understand. Diode, next to that, inshallah, we will start the charging section, so before that, I will try to tell you some things about the most pet and transistor, after that, inshallah, we will start the charging circuit . How do you protect your over voltage? Inshallah, I will explain it to you in the charging section. After removing all these things, what is there now has started to become NICUs, including mosfet, etc. This same diode makes your mosfet. From this diode,
your transistor is made. So all these components are made from mosfet and transistor. There are uses in all these meaningful things, so you only have to try to watch the whole video carefully and explain it to yourself so that you understand it properly and if it is not easy for me to explain it to you, what is more is that you will remember it in your prayers, Allah will take care of you.
2025-03-16 13:57
