Home Theater Board Voltage Tracking, voltage testing 2.1 home की वोल्टेज चेक करना सीखे
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00:00Hello Friends, Welcome to SK Electronics Works
00:03How are you friends? I hope you are doing good
00:05So friends, see in front of me
00:08There is a board of 2.1
00:10I was getting a lot of comments
00:12Please make a video on this
00:14How much voltage we get on this
00:16And when should the voltage be
00:19How much should it be? What should be the IC?
00:22So completely I have told you in this video
00:25One by one at one point
00:27Where you have to check this
00:30When your board is dead or closed or any problem
00:33So what should you check?
00:36So friends, keep watching the video till the end
00:38If you are new on my channel, then you can subscribe to the channel
00:41Because I get a video related to electronics daily
00:44In which you get a lot of good information
00:47Okay friends, let's move ahead
00:50See friends, first of all you have to set the multimeter
00:54Here you have to set the AC voltage
00:57After that, you have to
01:00Close both of them
01:03See friends, first of all
01:06When we check any board
01:09So let's check whether our voltage is present or not
01:12Means how much voltage we are getting
01:15So here we get voltage from the transformer
01:18On the diode, from the diode to the capacitor
01:21From the capacitor to our pure DC
01:24And from the capacitor to the regulator IC
01:27So what we have to do
01:30First of all, we have to check the transformer
01:33So the line of the transformer
01:36It comes in minus, that is, the AC current comes
01:39By plus or minus here
01:42Our four diodes are connected
01:45These are the different voltages that we send to the capacitor
01:48So our job is to make this in DC
01:51So first of all we have to check the transformer
01:54What you have to check in the transformer
01:57There are three wires, one of 12, one of 0 and one of 12
02:00Means here you will get 12 voltage
02:03Up means you can get up, not down
02:06And this is our 0, so we will put the first pin on 0
02:09So this jumper is going here, so we will put it here
02:12So let's check
02:15So friends, 11.7 is coming, so this is correct
02:18Let's check on the other pin
02:2111.45, this is also correct
02:24Why is it coming in a little up-down point
02:27Because there is a local transformer in it
02:30This is the difference in local and regional transformers
02:33Now we have to check when our voltage is equal
02:36We want to get one or two points
02:39If it is in 11 points, then there is no problem
02:42If it is coming like this, then there is a problem
02:45So what we will do in that situation, we will change the transformer
02:48Friends, then come to the second number, our capacitor
02:51Our capacitor has DC voltage, so we have to check it by putting it on DC
02:54We have set the multimeter on DC
02:57After doing this, what you have to do
03:00This black probe is here
03:03Both the capacitors are grounding
03:06So you can see, these capacitors are here
03:09Both are grounding
03:12So what you have to do is, you have to put a pin here
03:15So we have to put a pin here
03:18And we will check the voltage on both the capacitors
03:21So we are checking the voltage
03:24So 15.66 on the first capacitor
03:27We got the voltage in plus
03:30There is no sign in minus
03:33Now we got 15.72
03:36This is in minus, that is, the voltage of our capacitor is coming on the pro
03:39So this is your voltage
03:42If it is coming on the pro, then it is fine
03:45Then what we have to do is, we have to put a regulator here
03:48This is a 7805 SCR
03:51We will get 12 volts on the input and 5 volts on the output
03:54The middle one is its ground, if we don't get it
03:57If we get 12 volts and 5 volts output, then we will change this regulator
04:00Once we check it, its input is from here
04:03And the output is here
04:06So you have to keep this one ground
04:09You can keep it forever or you can solve it here
04:12To check
04:15So let's check pin number 1
04:18Friends, when you remember that you are going to put 7805
04:21Then you have to give plus voltage
04:24If you say that there are two capacitors in it, which one should we give voltage
04:27Then you will be confused, you have to give voltage from the plus point
04:30That is, in which we got the voltage from the plus
04:33So we will give it from this
04:36If we give it from this, then it will not be made
04:39If you run it there, then it will be a short circuit, which is wrong
04:42So here we will put it on the ground and see on the first pin
04:45So we got 15.17, which is fine
04:48And we will see on the output, so 5.2
04:51That is, we got 5 volts right, so it is ok, no problem
04:54So our SCR is absolutely ok
04:57If we get voltage here, then we change it
05:00So it doesn't get bad in a short time
05:03Now it's the turn of the IC
05:06Now we just have to check the IC
05:09If there is any other voltage, then there is no problem in it
05:12So here we have to keep the ground
05:15See this IC, I will tell you
05:18Pin number 1 is your gain, which gives input gain
05:21And the second number is your ground
05:24And our pin number 3 is outside the minus
05:27Which is 12 volts
05:30Which is 12 volts
05:33Means 15 volts and 12 volts
05:36Because 15 becomes a little
05:39Then it's the turn of our fourth number
05:42The fourth number is the output of our speaker
05:45This is the output of the speaker
05:48And our fifth pin is 12 volts
05:51So here I have told you the details of all the pins
05:54Now we will do
05:57First we will put a pin on the ground
06:00Put the pin
06:03Pin number 1 is here
06:06We will not get any voltage on it
06:09If we check the voltage on it, then we will not get any special voltage
06:12So see once
06:15We are checking the voltage on it, I have put it on the ground
06:18Check pin number 1, there is no problem
06:21Because the IC is short
06:24So I will show you once
06:27Pin number 1, 2, 3, 4, 5
06:30So I have put the board upside down
06:33So if I check from here, then you have to check from here
06:36So I checked pin number 1 first
06:39This is pin number 1
06:42And on 2nd
06:45So our second pin is here
06:48If we check on 2nd
06:51Then there is no problem
06:54Because the 2nd pin is the ground
06:57So we will check
07:00There is no voltage
07:03If we check on 3rd pin
07:06Then we will get minus voltage
07:09So 14.93 volts
07:12If you do not get voltage here
07:15So you can see
07:18The voltage is coming from this capacitor
07:26So we got voltage from this capacitor
07:33So we have told you
07:36Then we come to pin number 4
07:39Pin number 4 is here
07:42If we get any voltage here, then your IC is short
07:45If you do not get any voltage here
07:48First I will solve this one
07:51As soon as we solve it, there is no problem
07:54We will hold it like this
07:57If I check on pin number 4, then we do not get any voltage here
08:00If you get voltage here, then your speaker's IC is bad
08:03This is the base IC
08:06This is the crossover 15881 which makes our gain
08:09So we do not get any voltage here
08:12If we get any voltage here, then the IC is short
08:15In that condition
08:18Your speaker will start blowing
08:21Without running anything, the speaker will blow
08:24So this IC is bad
08:27Now let's talk about pin number 5
08:30Pin number 5 is going to the capacitor
08:33If we talk about pin number 5
08:36We got 60 volts
08:39So we got voltage in plus
08:42This is not in minus, this is in plus
08:45If you do not get voltage here, then check the track
08:48If you get voltage here, then it is fine
08:51In plus on pin number 5
08:54And in minus on pin number 3
08:57So the voltage should be the same
09:00It is because of the capacitor
09:03I have told you the IC check
09:06You have to check all the ICs one by one
09:09You have to check on two common pins
09:12On pin number 3 and 5
09:15And if possible, check on the speaker
09:18If you get voltage, then the IC is short
09:21If we talk about pin number 5
09:24Then we will get voltage in plus
09:27If we talk about pin number 3
09:30If we talk about pin number 5
09:33Then we will get voltage in minus
09:36If we talk about pin number 5
09:39Then we will get voltage in minus
09:42If we talk about pin number 5
09:45Then we will get voltage in minus
09:48If we talk about pin number 5
09:51Then we will get voltage in minus
09:54If we talk about pin number 5
09:57These two resistors are for the output speaker
10:00These two resistors are for the output speaker
10:03These two resistors are for the output speaker
10:06These two resistors are for the output speaker
10:09These two resistors are for the output speaker
10:12These two resistors are for the output speaker
10:15These two resistors are for the output speaker
10:18These two resistors are for the output speaker
10:21These two resistors are for the output speaker
10:24If we talk about pin number 4
10:27If we talk about pin number 4
10:30If we talk about pin number 4
10:33If we talk about pin number 4
10:36If we talk about pin number 4
10:39If we talk about pin number 4
10:42If we talk about pin number 4
10:45If we talk about pin number 4
10:48If we talk about pin number 4
10:51This is pin number 4
10:54First of all....
10:57Check man voltage
11:00Check man voltage
11:03Check from transformer
11:06Check from diode
11:09From main capacitor
11:12From sceeno IC
11:15You can take it out
11:18you can check the IC one by one without overheating.
11:25So, you have to check this voltage completely and you don't have to check any other voltage.
11:30This is 4561 IC, so you don't have to check the voltage because it doesn't get damaged.
11:35It is powered by 12V but it doesn't get damaged so easily.
11:39So, we have cleared all the doubts.
11:42All you have to do is to check the transformer one by one without overheating.
11:54Friends, if you like this video, please like and share it with your friends.
11:58Friends, if you like this video, please like and share it with your friends.
12:24That's all for today.
12:25Jai Hind.
12:26Vande Mataram.
12:27My dear friends.
12:28That's all for today.
12:29Jai Hind.
12:30Vande Mataram.
12:31My dear friends.