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Hello friends, today we will learn how to use multimeter. Although multimeter has many functions. But there are some functions which if we learn, we can use multimeter to a large extent in mobile repairing, such as continuity, voltage, ohms etc.
We will learn about all the functions one by one. Continuity is used to check the continuity of the supply. The voltage function is used to check the value of voltage. Such as AC and DC voltages.
The use of ohms is used to check the value of components. We check the small components in omus. Such as capacitors and registrations. We have learned what these functions mean. Now we will know how these functions are used in multimeter.
First of all we talk about continuity. First of all we have to set the multimeter to the button with continuity. After setting the two wires of the multimeter (red and black) have to be attached together, the sound of beep should be made when attaching. Now I will tell you where the continuity function is used in mobile repairing. The registration is full shot.
Therefore, to check the registration, when we connect both the wires of the multimeter to both ends of the register, the sound of beep should come. If the sound of the beep is coming then the registration is fine and if the sound of the beep is not coming, then the registration is spoiled. Now we will talk about how to check capacitor with continuity function,
In order to check the capacitor with a continuity function, when we are applying both wires of the multimeter to both ends of the capacitor, if the beep is sounding, then the capacitor is damaged and if the beep is not coming then the capacitor is correct. This is because capacitors are never short and registrations are shot. Capacitors are of brown color and registrations are of black color.
Now we will learn how to check if you want to check the shorting in a phone with the continuity function? For this, we have to go to the plus and minus terminals of the battery connector of any smartphone. Now we have to attach the plus wire of the multimeter to the plus wire of the battery connector and attach the minus wire of the multimeter to the minus terminal of the battery connector. Attachment will bring value zero
Now we have to reverse both the wires means to attach the plus wire to the battery connector’s – terminal and attach the minus wire to the plus terminal of the battery connector. Some value will come when attached, that value will be around 300 to 400. In this condition, our phone will be correct.
That is to say, the value should not come on direct stars and some value should come when reversing the stars, then in this condition the phone is not shot, and if there is some value coming on either side or attaching a beep sound So there is shorting in the phone. If some value is coming on both the sides then the phone is half short, in this condition the phone will be hot and the battery backup will be reduced.
And if the sound of beep is coming, then the phone will not be turned on in dead condition. Now we learn how to check the diode with continuity function. The diodes are black in color and are flat. When we attach both wires of the multimeter to both ends of the diode, the sound of beep should not come. If the beep sounds, then the diode is bad and if the elapsed sound is not coming then the diode is correct.
The function of a diode is that it does not allow too much current to pass. One end of the diode is grounded. Now we will learn how to check the speaker with continuity function. In order to check the speaker with the continuity function, if the beep sounds when applying both the multimeter virus on both the ends of the speaker then the speaker is correct and if the beep is not sound then the speaker is bad.
Now we will learn how to check the supply of the speaker inside the motherboard with the continuity function. To check the supply of the speaker, we have to attach the plus wire of the multimeter to the ground and – Attach the wire one by one to the two ends where the speaker attaches, if there is value coming at both ends. So the supply of the speaker is correct and if the value is not coming then the supply is bad then we have to fix the IC of the speaker or the components around it.
Now we will learn how to check the supply of the mic inside the motherboard, to check the supply of the mic, we have to touch the point of the multimeter on the ground and attach the minus point to both the points of the mic, the value at 1 point Will come and the sound of a beep will come on 1 point, in this condition your mic will be bad. The motherboard is right.
Now we will learn how to check voltage from multimeter, from multimeter we can check both AC and DC voltage. DC voltage means direct current and AC voltage means alternative current. The voltage that comes in mobile is DC current and the voltage that comes in homes is AC current. We can touch DC current with bare hands while we cannot touch AC current with bare hands.
Now we will know that where we need DC voltage in mobile, the current inside the mobile battery is in DC voltage, when we charge the mobile then the current that flows inside the motherboard of the mobile is DC current. Now, we will know how we can check all these currents with the help of multimeter, to check the voltage of the battery, we have to attach both the terminals of the multimeter to the plus and minus terminals of the battery and the button of the multimeter DC voltage has to be set to the value, to check the DC supply in the WOW mobile, the multimeter has to be set to a value of 20.
When we check the voltage from the multimeter, the sign of plus and minus also shows in the multimeter, with the help of this, we can also detect plus and minus if the sign is not coming, it means plus, the stars are absolutely straight. And if the sign of -ve will show it means the stars are inverted, we can detect positive and negative terminal. So in this way we can check both voltage and direction.
Now we will learn how to check the voltage of components. The values of the components are checked in ohms. For this, first of all we have to set the multimeter to the value of ohms, then later attach both wires of the multimeter to both ends of the components .. The need to check its value is at the time of applying the mic.
Now I will tell you which multimeter is best for mobile repairing. When we attach both wires of the antimeter by setting the multimeter to continuity mode, the multimeter where the earliest beep sound is the best for multimeter repairing.
Now I will tell you how to repair the power button or volume button in the phone with the help of a multimeter, then how to repair a volume button or power button with the help of a multimeter, first of all we need to put the multimeter on continuity mode Will have to disconnect the battery from the motherboard after setting it to continuity mode, after connecting the DIS, the button which is the problem
It has 2 points, one is plus and one is -VE, which is a power button, one point is grounded, 1 point is of plus. To check the supply on the plus we have to check the supply plus wire of the multimeter on the motherboard. To place on the ground and attach the -VE wire to that point,
After attacking, if there is a value coming there, then that button is correct and on the other point, the ground beep should be spoken, if one side is beep aa and on the other side the value is coming then it means that the button itself is bad In this case, we will change the button and if the value is not coming then it means the supply from the motherboard to the button is missed, so in this condition we will make the supply with the help of a jumper wire.
Now suppose the supply is coming and the beep is coming, then in this condition, we will not change the button first, by repairing the button, we will see that a plastic paper is placed above the button to repair the button, it will be removed with the help of a surgical blade. By scratching a little, the button starts moving, if the button is working by pressing it hard, then the problem will be removed in this way and if the button is not working at all or has broken, then in this condition you can turn the button iron With the help of .