Not sure if caps are going bad

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  • awdark
    New Member
    • Oct 2012
    • 5
    • United States
    #1

    Not sure if caps are going bad

    This is one of those times when I wish I was better at reading schematics so I could just build one of those ESR meters.

    Anyways, my TV has issues starting up and I decided to open it up before anything actually bursts. When I search for my tv [x32gv komodo] on ebay I see capacitor sets so I know some do fail.

    Strangely enough all the capacitors on the power board look fine to me. Even the capxon capacitors look nice with a well defined X. None look bulged or leaking as I had been expecting.

    I read about heat being one of the symptoms and if anything it would be the large 450v 180uf cap that feels a bit rounded and warm, the other two 35v 1500uf were also a bit warm but far from actually hot (can leave finger on it without discomfort).

    I deviated from the power board to check the main board and did see some surface mount capacitors that looked suspicious to me. Is this normal?

    I have 4 of them and they all look and feel slightly bulged and I have never seen surface mount caps with a defined cross on them like that.
    Last edited by awdark; 10-18-2012, 11:40 PM. Reason: This site doesn't like thumbnail links
    Tags: None
    • mariushm
      Badcaps Legend
      • May 2011
      • 3799
      #2
      Re: Not sure if caps are going bad

      The logo belongs to Samyoung : http://www.samyoung.co.kr/eng/

      Those are SMD electrolytics. They might be going bad, but without an ESR meter, I don't know what to tell you.

      Their product list for SMD electrolytics is here: http://www.samyoung.co.kr/eng/product/product_info.asp

      I can't tell the exact series they may be... start looking into the datasheets and see if the codes match... that 66EK may be a series code.

      ps. the pink/mauve caps may be enesol or sanyo (os-con) - polymers, both not known for problems.
      Last edited by mariushm; 10-19-2012, 12:52 AM.

        Comment

        • ben7
          Capaholic
          • Jan 2011
          • 4059
          • USA
          #3
          Re: Not sure if caps are going bad

          OST fail even when not bloated.

          Replace the small startup capacitors (usually 47uF 50v) on the PSU.
          Muh-soggy-knee

            Comment

            • Hemingray
              KABOOM!
              • Jul 2010
              • 143
              • USA
              #4
              Re: Not sure if caps are going bad

              Is it just me or is the main filter cap a Fuhjyyu?

                Comment

                • ben7
                  Capaholic
                  • Jan 2011
                  • 4059
                  • USA
                  #5
                  Re: Not sure if caps are going bad

                  Originally posted by Hemingray
                  Is it just me or is the main filter cap a Fuhjyyu?
                  Nope, it's made by Hitachi (the vent shape gives it away)
                  Muh-soggy-knee

                    Comment

                    • Pentium4
                      CapXon Be Gone
                      • Sep 2011
                      • 3741
                      • USA
                      #6
                      Re: Not sure if caps are going bad

                      Yeah, Fuhjyyu just made a rip off logo of Hitachi

                        Comment

                        • momaka
                          master hoarder
                          • May 2008
                          • 12170
                          • Bulgaria
                          #7
                          Re: Not sure if caps are going bad

                          Originally posted by ben7
                          Replace the small startup capacitors (usually 47uF 50v) on the PSU.
                          +1

                          I see 4 small electrolytic caps between the primary and secondary heat sinks. I too would say to start by replacing those.

                          Also, there should be a stand-by rail or two. Most TV boards usually have 5V when the TV is "OFF" but plugged in. Are any of the pins labeled on the lower connector of this picture?
                          http://i791.photobucket.com/albums/y...2/IMG_0271.jpg

                            Comment

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