Hi. I have a Samsung 40" LCD TV (LE40S71B) that has became very noisy. It's kind of humming and buzzing noise, and the noise changes relative to the amount of light on the screen. I think when it's at the brightest, the noise is worse. It has been some noisy all the time, but little by little more and more over the years.
I have opened the TV and found what components that makes the noise. There are several, but the worst is coming from the largest transformator (1 on the picture). On the picture I have marked where the noise comes from. The one marked 1 is worst, 4 has least noise. Could'nt find anything else that makes any noise.
Then I have some questions. I'm thinking of replacing all the caps. No caps seems to be defect (visual), but I want to change them all anyway. Maybe the noise will be reduced?
I'm also thinking of glue the transformators. Is it possible? What type of glue can be used?
I used some Dow Corning 738 on some coils a time ago. But it did not stop the whine. Think it needs something much more thin type of glue that surrounds all the copperwire. I'm not sure here, but I guess thats what it needs. Sort of the same on transformators? Is it possible? And safe? What to use? Brand?
And I'm thinking of buying Panasonic FC caps. Is that a good choice for TV usage (and psu's in general)? I wan't to buy the best caps out there when I want to replace them.
Thank you very much for help.
I have opened the TV and found what components that makes the noise. There are several, but the worst is coming from the largest transformator (1 on the picture). On the picture I have marked where the noise comes from. The one marked 1 is worst, 4 has least noise. Could'nt find anything else that makes any noise.
Then I have some questions. I'm thinking of replacing all the caps. No caps seems to be defect (visual), but I want to change them all anyway. Maybe the noise will be reduced?
I'm also thinking of glue the transformators. Is it possible? What type of glue can be used?
I used some Dow Corning 738 on some coils a time ago. But it did not stop the whine. Think it needs something much more thin type of glue that surrounds all the copperwire. I'm not sure here, but I guess thats what it needs. Sort of the same on transformators? Is it possible? And safe? What to use? Brand?
And I'm thinking of buying Panasonic FC caps. Is that a good choice for TV usage (and psu's in general)? I wan't to buy the best caps out there when I want to replace them.
Thank you very much for help.
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