2030-2050 ic बार बार ख़राब होने के कारण और उसके निवारण -- ic लगते ही ख़राब हो जाना या थोड़ी देर मे ख़राब
2030-2050 ic बार बार ख़राब होने के कारण और उसके निवारण -- ic लगते ही ख़राब हो जाना या थोड़ी देर मे ख़राब
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00:00Hello So, Welcome to Skelectrons World Club
00:04Guys, Today's video is on this topic
00:07We are getting so many comments
00:10When we have a home theater board or any amplifier board
00:15It has an IC and the IC blows up again and again
00:18It blows up after one or two seconds
00:21Or it blows up after a while or after a day or two
00:25What is the reason for that?
00:27And what is the main reason for the IC to blow up again and again?
00:31So, in this complete video, we will talk about this
00:34And we will also show why it blows up and what is the reason
00:38And we will tell you everything in a deep and good way
00:41Friends, do watch the video till the end
00:43If you want to understand well
00:45If you are on our channel, you can subscribe
00:47If you have done it, it is a very good thing
00:49First of all, you have to pay special attention to one thing
00:51What is it?
00:53Now this is the board of the company
00:55This is the board of the company
00:57In the local board, there are two resistances in the output
01:01I mean, the speakers used in the output
01:05So, a lot of people direct it
01:08Because of this, the IC overheats quickly and breaks
01:11This is the first reason
01:13Consider the second reason
01:15Either from your heatsink
01:17Now I will show you by checking with a multimeter
01:19You have to pay attention to that thing
01:21When the IC does not stick well to the heatsink
01:24I mean, this is the area on all four sides
01:27This is the area
01:29Here is the thermal paste
01:31It is not sticking well
01:33Or the paste is not sticking well
01:35Okay, this is the second reason
01:37And what is the third reason, guys?
01:39Your heatsink is very thin
01:41Because of this, your IC breaks quickly
01:43Now comes the condition
01:45Why does the IC blow up as soon as it is installed?
01:47The biggest reason for the IC to blow up
01:49The biggest reason for the IC to blow up
01:51It happens like this
01:53The four diodes you see here
01:55These are the supply section
01:57One of these diodes should be short
01:59The way to check the diode
02:01I have told you
02:03The reading will come from one side
02:05It does not come from one side
02:07Okay, if it is coming from both sides
02:09Or the beep sound is coming
02:11In that condition, your diode is bad
02:13Change the diode
02:15Or first of all, I will recommend
02:17Before installing the IC
02:19Check the voltage
02:21Where is the plus or minus voltage
02:23Now let's talk about
02:25What is the voltage on which pin
02:27Now I will show you live
02:29I turned on the meter
02:31And it is set on
02:33Now you have to check one more thing
02:35This black probe
02:37You have to keep it on the ground
02:39Which is the ground of this
02:41The middle pin of the transformer
02:43This one
02:45One
02:47Input
02:49Two
02:51You will not get it on two
02:53It is for audio
02:55On the third pin
02:57On the third pin
02:59I will put a red probe
03:0115.98
03:03It is around 12 volts
03:05It is a local transformer
03:07When the capacitor is installed
03:09On the third pin
03:11You will not get any voltage on the fourth pin
03:13If you get on the fourth pin
03:15It means
03:17The IC of the speaker
03:19It is short
03:21You got it in negative
03:23On the third pin
03:25And on the fifth pin
03:27You will get it in positive
03:2915.98
03:31It is around 16 volts
03:33You got 15.98
03:35On the third pin
03:37When you go to install the IC
03:39Before installing the IC
03:41You have to remove the IC
03:43Then
03:45On the pin out
03:47You have to put it like this
03:49On the ground
03:51The middle pin of the transformer
03:53It is the ground
03:55On that
03:57You have to put
03:59One, two, three, four, five
04:01So
04:03This is the first
04:05This is the second
04:07This is the third
04:09So
04:11It is around 12 volts
04:13Because it is around 12
04:15So
04:17On the fourth pin
04:19It is the speaker output
04:21On the fifth pin
04:23It is the voltage input
04:25I mean
04:27Until you get the voltage
04:29Or it is very less
04:31It is wrong
04:33If you have
04:35On the fifth pin
04:3712, 15,
04:39I mean
04:4112 to 18
04:43You should get it
04:45On the fifth pin
04:47So
04:49You can install the IC
04:51If you have
04:532 to 3 voltage difference
04:55Don't install the IC
04:57Clear the supply section
04:59What can be the problem
05:01The main capacitor
05:03It can be weak
05:05So
05:07Change both
05:0925V 2200mf
05:11Or 25V
05:134700mf
05:15If you are using 5A transformer
05:1712012
05:1935V
05:214700mf
05:23It will not burst
05:25The quality will be best
05:27The IC will not blow
05:29If you put the capacitor
05:31Still you get the voltage
05:33In that condition
05:354 diodes
05:371, 2, 3, 4
05:39In the supply section
05:41Where the main transformer is
05:43You will get these diodes
05:45From these 4 diodes
05:47You have to check
05:49You have to check all
05:51You will get short in these
05:53If you are getting up and down
05:55If you are getting up and down
05:57Then you have to check the transformer
05:59To check the transformer
06:01To check the transformer
06:03200V AC
06:05OK
06:07Take out the wire
06:09From the circuit board
06:11Take out the wire
06:13From the PCB
06:15OK
06:17Put the probe in the middle
06:190
06:21OK
06:23Put the probe in the middle
06:25Let's take it here
06:2712
06:2912.2
06:31Let's take it here
06:3312.2
06:35If you are getting equal
06:37If you are getting more
06:39In that condition
06:41The transformer is bad
06:43In the last
06:4523
06:4723
06:49In 220V
06:51The transformer is bad
06:53Put the probe in the middle
06:55OK
06:57If you are getting equal
06:59Let's check
07:01If you are getting equal
07:0312.2
07:0512.2
07:0712.2
07:0912.2
07:11In that condition
07:13The transformer is good
07:15Or else
07:17In this condition
07:19In that condition
07:21Let's check
07:23Let's check
07:25I will put it on 20V
07:27So from here
07:29Bridge Rectifier become
07:31Converted from DRIOD
07:33So on one filter
07:3515.1V
07:37Second capacitor is here
07:39See
07:4115.83V
07:43Means Approx
07:4515V is equal
07:47There can be difference in some points
07:49Don't take it too deeply
07:51When you get equal voltage on both capacitors
07:53Don't put IC
07:55I have told you about IC
07:57Pin no.3 is Minus
07:59Pin no.5 is Plus
08:01Put IC
08:03Don't blow your IC
08:05Before putting IC
08:07Check this
08:09Reason for blowing IC
08:11Sometimes
08:13Customer touch each other
08:15So it blows
08:17But if
08:19Due to diode short
08:21Or due to over voltage
08:23Or due to broken capacitor
08:25It becomes problem
08:27Sometimes
08:29Base become loose
08:31So tighten it
08:33It will be better
08:35Tighten it
08:37So
08:39Understand
08:41Check IC voltage
08:43If voltage is clear
08:45Put IC on heat sink
08:47If everything is fine
08:49Still your IC is blowing
08:51In that condition
08:53This speaker
08:55Base speaker
08:57Output speaker
08:59Check it
09:01When
09:03IC short
09:05Pin no.4
09:07Direct DC
09:09Local
09:11Home data
09:13No resistance
09:15On output
09:17IC
09:19Pin no.4
09:21Output speaker
09:23Local
09:25Home data
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