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    Is this cap good or bad

    It says 470uF 35w and is about 32mm length.
    Koshin (M) 85°C

    I measured with this device I have and I'm trying to understand if it's good or bad.,


    #2
    Re: Is this cap good or bad

    the uf looks rather high so most likely needs a new one .

    Comment


      #3
      Re: Is this cap good or bad

      Bad cap, it is showing the reading of 3401uF for the 470uF cap.
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

      Comment


        #4
        Re: Is this cap good or bad

        it's very bad, when you get huge capacitance readings it means the cap is internally shorting and causing the tester to pump more power into it during the test - as you can see in the VLOSS figure.

        a polymer cap can be as high as 2.5%, some electrolytics as high as 1.5%.
        anything more is bad.

        Comment


          #5
          Re: Is this cap good or bad

          supposed to be 470uF but reading 3401uF? definitely bad.
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            #6
            Re: Is this cap good or bad

            Originally posted by stj View Post
            it's very bad, when you get huge capacitance readings it means the cap is internally shorting and causing the tester to pump more power into it during the test - as you can see in the VLOSS figure.

            a polymer cap can be as high as 2.5%, some electrolytics as high as 1.5%.
            anything more is bad.
            I thought 'lytics were/are generally spec'd at 20% tolerance? Do tell.
            sigpic

            (Insert witty quote here)

            Comment


              #7
              Re: Is this cap good or bad

              BTW, Did you try checking other capacitors to see if it shows correct value using your meter.
              is this KOSHIN Electrolytics cap? What series?

              https://cdn.badcaps-static.com/pdfs/...6c7cb31823.pdf
              Last edited by budm; 06-29-2020, 01:20 AM.
              Never stop learning
              Basic LCD TV and Monitor troubleshooting guides.
              http://www.badcaps.net/forum/showthr...956#post305956

              Voltage Regulator (LDO) testing:
              http://www.badcaps.net/forum/showthr...999#post300999

              Inverter testing using old CFL:
              http://www.badcaps.net/forum/showthr...er+testing+cfl

              Tear down pictures : Hit the ">" Show Albums and stories" on the left side
              http://s807.photobucket.com/user/budm/library/

              TV Factory reset codes listing:
              http://www.badcaps.net/forum/showthread.php?t=24809

              Comment


                #8
                Re: Is this cap good or bad

                Originally posted by ratdude747 View Post
                I thought 'lytics were/are generally spec'd at 20% tolerance? Do tell.
                I believe STJ is referring to the VLOSS (D.F. - Dissipation Factor or Tan).
                VLOSS of 13% = to D.F. of 0.13

                For example of Panasonic FR series has D.F. from 0.09 ~ 0.22
                Attached Files
                Last edited by budm; 06-29-2020, 01:23 AM.
                Never stop learning
                Basic LCD TV and Monitor troubleshooting guides.
                http://www.badcaps.net/forum/showthr...956#post305956

                Voltage Regulator (LDO) testing:
                http://www.badcaps.net/forum/showthr...999#post300999

                Inverter testing using old CFL:
                http://www.badcaps.net/forum/showthr...er+testing+cfl

                Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                http://s807.photobucket.com/user/budm/library/

                TV Factory reset codes listing:
                http://www.badcaps.net/forum/showthread.php?t=24809

                Comment


                  #9
                  Re: Is this cap good or bad

                  tolerance means the capacitance can vary by 20% over it's temperature range,
                  3401 is not within 20% of 470

                  you liberals always miss-understand tolerance!
                  Last edited by stj; 06-29-2020, 02:42 AM.

                  Comment


                    #10
                    Re: Is this cap good or bad

                    Originally posted by budm View Post
                    BTW, Did you try checking other capacitors to see if it shows correct value using your meter.
                    is this KOSHIN Electrolytics cap? What series?

                    https://cdn.badcaps-static.com/pdfs/...6c7cb31823.pdf
                    Thanks for your support everyone.

                    I did replace it. Also this bad one was slightly bulging.

                    They combined series for this one in the chart. When I look for 470 35v the size isn't there but it's below. 15x31.5mm

                    I will ask in a separate thread for help or if there is virtual services offered.

                    Comment


                      #11
                      Re: Is this cap good or bad

                      85' temp caps are general purpose, the ESR is never given for them.
                      and the ripple current(the amount the cap can store and release) cant be tested on small testers.

                      Comment

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