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Thread: Switch is not switching

  1. #46
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    Before throwing out the original T4 AC adapter I decided to open it up and take a look. With a little persuasion in a vise I carefully cracked open the glue joints around the cover. Inside I can see that C9 has a swollen top so this is likely leaking causing a high ripple. C9 is a 1000uf 16v electrolytic.

    If I was energetic I would change that cap and see if it works properly again but since my receiver is ok with the replacement power supply I am gonna throw out the old one.

    Just thought that I would mention this in case someone else has an issue with the adapter. It's not too hard to open and the components are easily accessible for desoldering.

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  3. #47
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    Yup...Cheap caps, the death of low priced electronic stuff, bet it's not correctly rated or not rated high enough for the circuit it's in.
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  5. #48
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    Quote Originally Posted by Terryl View Post
    Yup...Cheap caps, the death of low priced electronic stuff, bet it's not correctly rated or not rated high enough for the circuit it's in.
    Several years ago I had a Samsung 52" LED tv that died. I opened it up and found several caps in the power supply were all swollen. I replaced them and it cured the problem. (I have a Sharp Aquos now, much better tv).

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    When I was in the circuit designing part of my life, I always rated the electrolytic caps to 25 to 50% of the design voltage and temperature spec for that equipment.

    However marketing would come back and say that the proffet margins were too low, production would use cheaper parts, I would complain but the money talks.
    ♫♫♫ Iím a lumberjack and Iím OK ♫♫♫ I drink all night and sleep all day. ♫♫♫



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    Quote Originally Posted by dogdayz View Post
    Several years ago I had a Samsung 52" LED tv that died. I opened it up and found several caps in the power supply were all swollen. I replaced them and it cured the problem. (I have a Sharp Aquos now, much better tv).
    I had exactly the same problem with exactly the same t.v:6 dollar fix.It has been working for over 3 years since the repair

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    Sorry about the thread jack though.

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