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    Help with smd capacitor test

    i try to test an smd capacitor out of circuit but get no reading how to do?

    #2
    Re: Help with smd capacitor test

    i guess you found a bad one .. maybe try test a new one .

    Comment


      #3
      Re: Help with smd capacitor test

      i did it with 11 other but it is same is all of them bad?

      Comment


        #4
        Re: Help with smd capacitor test

        Originally posted by bohaboha View Post
        i did it with 11 other but it is same is all of them bad?
        maybe its your meter? try another meter?

        Comment


          #5
          Re: Help with smd capacitor test

          tested with what?

          Comment


            #6
            Re: Help with smd capacitor test

            Hi stj with multimeter in diode and ohms

            Comment


              #7
              Re: Help with smd capacitor test

              You really can not test capacitors correctly this way you at a minimum have capacitor checker at minimum but really need a ESR capacitor tester to do this correctly
              9 PC LCD Monitor
              6 LCD Flat Screen TV
              30 Desk Top Switching Power Supply
              10 Battery Charger Switching Power Supply for Power Tool
              6 18v Lithium Battery Power Boards for Tool Battery Packs
              1 XBox 360 Switching Power Supply and M Board
              25 Servo Drives 220/460 3 Phase
              6 De-soldering Station Switching Power Supply 1 Power Supply
              1 Dell Mother Board
              15 Computer Power Supply
              1 HP Printer Supply & Control Board * lighting finished it *


              These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

              1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
              2 Hem Saw Computer Stack Board

              All of these had CAPs POOF
              All of the mosfet that are taken out by bad caps

              Comment


                #8
                Re: Help with smd capacitor test

                you mean that it is not possible with multimeter or digital tweeser am talking about microscopic smd capacitors the ones on the tv screen boards

                Comment


                  #9
                  Re: Help with smd capacitor test

                  No capacitor can not be tested correctly just using diode test or ohmmeter

                  With just a ohm meter or diode test will only tell you if is shorted but nothing else really

                  Now if you have a capacitor tester that shows you UF value that is better than nothing however it does not tell you if the capacitor is good or not for this you need a ESR capacitor tester for this

                  This is the ESR capacitor tester that I use

                  https://www.ebay.com/itm/18423015559...QaAnBZEALw_wcB
                  Last edited by sam_sam_sam; 09-05-2021, 09:09 AM.
                  9 PC LCD Monitor
                  6 LCD Flat Screen TV
                  30 Desk Top Switching Power Supply
                  10 Battery Charger Switching Power Supply for Power Tool
                  6 18v Lithium Battery Power Boards for Tool Battery Packs
                  1 XBox 360 Switching Power Supply and M Board
                  25 Servo Drives 220/460 3 Phase
                  6 De-soldering Station Switching Power Supply 1 Power Supply
                  1 Dell Mother Board
                  15 Computer Power Supply
                  1 HP Printer Supply & Control Board * lighting finished it *


                  These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                  1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                  2 Hem Saw Computer Stack Board

                  All of these had CAPs POOF
                  All of the mosfet that are taken out by bad caps

                  Comment


                    #10
                    Re: Help with smd capacitor test

                    Thank you for the answer your tools is for proffs

                    Comment


                      #11
                      Re: Help with smd capacitor test

                      Originally posted by bohaboha View Post
                      Thank you for the answer your tools is for proffs
                      There other versions of this ESR that cost less however the quality with some of them is questionable
                      9 PC LCD Monitor
                      6 LCD Flat Screen TV
                      30 Desk Top Switching Power Supply
                      10 Battery Charger Switching Power Supply for Power Tool
                      6 18v Lithium Battery Power Boards for Tool Battery Packs
                      1 XBox 360 Switching Power Supply and M Board
                      25 Servo Drives 220/460 3 Phase
                      6 De-soldering Station Switching Power Supply 1 Power Supply
                      1 Dell Mother Board
                      15 Computer Power Supply
                      1 HP Printer Supply & Control Board * lighting finished it *


                      These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                      1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                      2 Hem Saw Computer Stack Board

                      All of these had CAPs POOF
                      All of the mosfet that are taken out by bad caps

                      Comment


                        #12
                        Re: Help with smd capacitor test

                        our tools cost about the same as a couple of beers in sweden after taxes!

                        Comment


                          #13
                          Re: Help with smd capacitor test

                          You don't need to use that, the cheap "transistor tester" that has been discussed here and elsewhere works just fine and can be had for the same price as the cheapest beer you can find in Systembolaget.
                          "The one who says it cannot be done should never interrupt the one who is doing it."

                          Comment


                            #14
                            Re: Help with smd capacitor test

                            oh stj,sam_sam_sam and Per Hanson thank you i have that cheap an will test and se.
                            tack Per Hanson glömde bort den den ligger nånstans jag skall söka

                            Comment


                              #15
                              Re: Help with smd capacitor test

                              beer must have increased in price over the last few years - or the taxes increased!!

                              Comment


                                #16
                                Re: Help with smd capacitor test

                                Oops, the quick glance on eBay fooled me: the prices where for empty cases etc.
                                So make it 10 beers then
                                "The one who says it cannot be done should never interrupt the one who is doing it."

                                Comment


                                  #17
                                  Re: Help with smd capacitor test

                                  beer are not that expensive as it was even taxes Per Hansson can tell
                                  no not 10 beers Per just around 4 or 5

                                  Comment


                                    #18
                                    Re: Help with smd capacitor test

                                    ok i di some test and i get :28pF from both end of the capacitor and it does not show any esr so i can not know if it is good or not. the result is the same on all 12 capacitors

                                    Comment

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