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Anyone know about plasma tv capacitors??

Discussion in 'Off-Topic Discussion' started by anthony250f, Aug 6, 2016.

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  1. Aug 6, 2016 at 5:03 PM
    #1
    anthony250f

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    anthony250f [OP] Well-Known Member

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    Hey guys so I recently got a old plasma tv for super cheap. It's a 50" Samsung. Worked great and watched the tv for hours. Last night the tv screen went black after 10-15 mins of use. If I let it sit then turned it back on picture was restored for another 10-15. I pulled the panel to heck the capacitors. Most places online said it would be on the Y board, but j found these on the power board. Could this be me issue?
    image.jpg image.jpg
     
    anthony250f, Aug 6, 2016
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  2. Aug 6, 2016 at 5:17 PM
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    tomwil

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    tomwil Well-Known Member

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    Yes. Swollen capacitors are not good, and could eventually leak or short out.

    https://en.wikipedia.org/wiki/Capacitor_plague

    [​IMG]
     
    tomwil, Aug 6, 2016
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  3. Aug 6, 2016 at 5:23 PM
    #3
    anthony250f

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    anthony250f [OP] Well-Known Member

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    I was gonna replace them myself but after seeing how confusing the board is I don't think I could do it
     
    anthony250f, Aug 6, 2016
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  4. Aug 6, 2016 at 5:32 PM
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    Speedytech7

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    Speedytech7 Toyota Cult Ombudsman

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    I bet you could do it. That's about as simple as a circuit board gets considering it is through hole design and not surface mount
     
    Speedytech7, Aug 6, 2016
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  5. Aug 6, 2016 at 5:38 PM
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    anthony250f

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    anthony250f [OP] Well-Known Member

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    I don't even know how to solder though lol
     
    anthony250f, Aug 6, 2016
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  6. Aug 6, 2016 at 5:44 PM
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    se7enine

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    se7enine MCMLXXIX

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    It's as easy as scraping peanut butter from one finger to the next.
     
    se7enine, Aug 6, 2016
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  7. Aug 6, 2016 at 5:47 PM
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    captainbuttfloss

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    captainbuttfloss #16!

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    looks to be unsupported thu-hole. just clinch the leads on the bottom side and remember flux is your friend! it really is easy, maybe try it on a scrap board first, but i'm sure you'd be fine.
     
    captainbuttfloss, Aug 6, 2016
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  8. Aug 6, 2016 at 5:49 PM
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    anthony250f

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    anthony250f [OP] Well-Known Member

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    But do you guys think that would be the cause of my issues? Plasma is old school. Want a led tv but don't have the extra cash due to the truck absorbing every cent lol
     
    anthony250f, Aug 6, 2016
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  9. Aug 6, 2016 at 5:49 PM
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    anthony250f

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    anthony250f [OP] Well-Known Member

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    How do you know what side is pos and what side is neg?
     
    anthony250f, Aug 6, 2016
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  10. Aug 6, 2016 at 5:51 PM
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    captainbuttfloss

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    captainbuttfloss #16!

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    usually capacitors will be marked with negative polarity

    [​IMG]
     
    captainbuttfloss, Aug 6, 2016
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  11. Aug 6, 2016 at 5:55 PM
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    tomwil

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    tomwil Well-Known Member

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    Plasma still has a much better picture than LED, especially for motion and viewing angle. Only newer and expensive OLED technology might surpass plasma eventually.
     
    tomwil, Aug 6, 2016
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  12. Aug 6, 2016 at 6:02 PM
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    anthony250f

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    anthony250f [OP] Well-Known Member

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    How do you remove the old one
     
    anthony250f, Aug 6, 2016
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  13. Aug 6, 2016 at 6:19 PM
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    4x4Runner

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    4x4Runner Sam’s gone, man. Moderator

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    Get a soldering iron and heat it up to temp. Apply a little solder to it and apply it to the contact point on the other side of the circuit board where the capacitors legs go through. The solder on the tip acts as a heat bridge and makes it easier to heat up the solder on the board to where it melts. Get either some wicking material (metal braid usually sold where you'll find soldering equipment) or get a spring loaded solder sucker to remove old solder.
     
    4x4Runner, Aug 6, 2016
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  14. Aug 6, 2016 at 6:20 PM
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    4x4Runner

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    4x4Runner Sam’s gone, man. Moderator

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    4x4Runner, Aug 6, 2016
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  15. Aug 6, 2016 at 6:22 PM
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    tomwil

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    tomwil Well-Known Member

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    tomwil, Aug 6, 2016
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  16. Aug 6, 2016 at 6:27 PM
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    4x4Runner

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    4x4Runner Sam’s gone, man. Moderator

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    4x4Runner, Aug 6, 2016
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  17. Aug 6, 2016 at 6:35 PM
    #17
    4x4Runner

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    4x4Runner Sam’s gone, man. Moderator

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    Here's some examples of solder joints and how tepmrature and other variables affect them.
    image.jpg
     
    4x4Runner, Aug 6, 2016
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  18. Aug 6, 2016 at 7:09 PM
    #18
    anthony250f

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    anthony250f [OP] Well-Known Member

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    The connections are so close together, would be worried about connecting multiple pointsimage.jpg
     
    anthony250f, Aug 6, 2016
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  19. Aug 6, 2016 at 8:03 PM
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    rplusplus

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    rplusplus Well-Known Member

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    OP, I did this for a living for 25 years.

    1) It is easy to do but I can understand your hesitation.
    2) Go to Willy's Electronics on Mercury Street in Kearny Mesa and get a good adjustable soldering iron and solder wick.
    3) Anytime you see a swollen CAP it's bad or going bad. I've saved a ton on computers, TV's, and other consumer electronics replacing CAP's.
    4) The bigger the blob, the better the job! (This is a joke and usually at the expense of people who can't solder worth a crap) You need very little solder to get a good job. Flux, Proper heat, and just a dab will do you. We used to practice on crap boards to get the feel for it. Find an old circuit board to practice on.
    5) when you do it. Heat up and pull out the old CAP. Then insert the new cap with those nice long leads into the holes, following the polarity as stated above. Then put a small squirt of flux on the circuit board. Touch the soldering iron about 1/8 inch up the lead on the new CAP and place the solder on the circuit board on the metal ring. Once the lead heats up enough with the help of the flux that solder will flow into and seal the connection. Clean with Technical Alcohol (not that crap they sell at Rite-Aid, get the good stuff at Willy's). Then clip off the extra lead with dikes. Tada.
     
    rplusplus, Aug 6, 2016
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  20. Aug 6, 2016 at 8:08 PM
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    anthony250f

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    anthony250f [OP] Well-Known Member

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    Do they sell the capacitors there ?? Damn wish it was closer to me (San Marcos) I will probably give it a go.
     
    anthony250f, Aug 6, 2016
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