capacitor with no esr value

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  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #41
    Re: capacitor with no esr value

    The attachments you have linked to aren't working...
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

    Comment

    • 1supertech
      Badcaps Veteran
      • Apr 2012
      • 384
      • USA

      #42
      Re: capacitor with no esr value

      Other pic of mainboard may be to small
      I think this will do
      Attached Files

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #43
        Re: capacitor with no esr value

        Is there anything on the back side of the board? Any LDOs like in the picture?

        http://img.diytrade.com/cdimg/108715..._LM1117_1A.jpg
        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

        Comment

        • 1supertech
          Badcaps Veteran
          • Apr 2012
          • 384
          • USA

          #44
          Re: capacitor with no esr value

          Nope
          Attached Files
          Last edited by 1supertech; 06-08-2012, 02:03 PM.

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #45
            Re: capacitor with no esr value

            I can see one next to the two black caps labelled NP3. There may be others, I can't see any though. Test all the pins of NP3, relative to the metal case.
            Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
            For service manual, schematic, boardview (board view), datasheet, cad - use our search.

            Comment

            • 1supertech
              Badcaps Veteran
              • Apr 2012
              • 384
              • USA

              #46
              Re: capacitor with no esr value

              Yes I do see it and what do you mean by test relative to the metal case

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #47
                Re: capacitor with no esr value

                Originally posted by 1supertech
                Yes I do see it and what do you mean by test relative to the metal case
                Meter on volts DC (20V), black probe in COM slot on meter and in a spare screw hole on TV (or any hole on the metal frame), red probe in volts/ohm and test each pin. Middle pin is the same as the fat tab, no need to test the fat tab. Report the pins 1, 2 and 3 (labelled arbitrarily, suggest left to right and that you keep it the same for each device.) Also include the part number on the device, for example AMS1117-18.
                Last edited by tom66; 06-08-2012, 02:21 PM.
                Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                Comment

                • 1supertech
                  Badcaps Veteran
                  • Apr 2012
                  • 384
                  • USA

                  #48
                  Re: capacitor with no esr value

                  Thank you Tom

                  Comment

                  • 1supertech
                    Badcaps Veteran
                    • Apr 2012
                    • 384
                    • USA

                    #49
                    Re: capacitor with no esr value

                    Originally posted by tom66
                    Meter on volts DC (20V), black probe in COM slot on meter and in a spare screw hole on TV (or any hole on the metal frame), red probe in volts/ohm and test each pin. Middle pin is the same as the fat tab, no need to test the fat tab. Report the pins 1, 2 and 3 (labelled arbitrarily, suggest left to right and that you keep it the same for each device.) Also include the part number on the device, for example AMS1117-18.
                    From left to right
                    1.3

                    3.303

                    05.04

                    part # EHI6A
                    715F83

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #50
                      Re: capacitor with no esr value

                      I looked at the NP3, looks like Adjustable regulator (you can see two network resistors on pin 1 & Gnd and pin1 & pin2. If that is the case the output should be 1.3 +1.25Vref = 2.55V output at pin 2 ( if we know the value of the two resistors then we can calculate the output voltage). Input pin 3 is 5V as printed on the board.
                      On the bottom side around top left corner, you can also see Adjustable Vreg VA21.
                      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

                      • tom66
                        EVs Rule
                        • Apr 2011
                        • 32560
                        • UK

                        #51
                        Re: capacitor with no esr value

                        The best way to check an adjustable regulator is the Vout to ADJ pin should measure 1.25V approximately.
                        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                        Comment

                        • 1supertech
                          Badcaps Veteran
                          • Apr 2012
                          • 384
                          • USA

                          #52
                          Re: capacitor with no esr value

                          You guy's are lossing me LOL

                          Comment

                          • budm
                            Badcaps Legend
                            • Feb 2010
                            • 40746
                            • USA

                            #53
                            Re: capacitor with no esr value

                            I have a feeling you have bad regulator, the output is too high. 1.25V ref is part of the internal circuits of the Regulator.
                            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

                            • 1supertech
                              Badcaps Veteran
                              • Apr 2012
                              • 384
                              • USA

                              #54
                              Re: capacitor with no esr value

                              so is this what was causing the short between power supply annd mainboard?

                              So I guess I need to buy another part form a digikey? # EHI6A 715F83

                              Comment

                              • 1supertech
                                Badcaps Veteran
                                • Apr 2012
                                • 384
                                • USA

                                #55
                                Re: capacitor with no esr value

                                I am trying to find this part # LDO regulator the # on chip are EH16A 715F83 cannot find it
                                help would be appriciated

                                Comment

                                • Mr Bill
                                  Badcaps Veteran
                                  • Nov 2011
                                  • 648
                                  • USA

                                  #56
                                  Re: capacitor with no esr value

                                  Originally posted by 1supertech
                                  I am trying to find this part # LDO regulator the # on chip are EH16A 715F83 cannot find it
                                  help would be appriciated
                                  Its a LDO regulator. Search this pdf and it'll show a table with your part number listed as "marking ID". The table is on page 4. Hope this helps you.
                                  Attached Files

                                  Comment

                                  • budm
                                    Badcaps Legend
                                    • Feb 2010
                                    • 40746
                                    • USA

                                    #57
                                    Re: capacitor with no esr value

                                    You can get the Adjustable LDO 1117 series from Digikey.
                                    Attached Files
                                    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

                                    • 1supertech
                                      Badcaps Veteran
                                      • Apr 2012
                                      • 384
                                      • USA

                                      #58
                                      Re: capacitor with no esr value

                                      I just received my LDO regulators; I guess the best way to remove and install regulators is a hot air station with liquid flux and solder paste ?

                                      Comment

                                      • tom66
                                        EVs Rule
                                        • Apr 2011
                                        • 32560
                                        • UK

                                        #59
                                        Re: capacitor with no esr value

                                        That works fine for me - you can also desolder them by applying a large glob of solder over all the pins, and then heating the glob with a soldering iron while slowly pushing the regulator. It will come off fairly quickly that way.
                                        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                        Comment

                                        • 1supertech
                                          Badcaps Veteran
                                          • Apr 2012
                                          • 384
                                          • USA

                                          #60
                                          Re: capacitor with no esr value

                                          Originally posted by tom66
                                          That works fine for me - you can also desolder them by applying a large glob of solder over all the pins, and then heating the glob with a soldering iron while slowly pushing the regulator. It will come off fairly quickly that way.
                                          I just tried removing a regulator of of a dead motherboard to practice, it worked ok with the solder that I have, but I think I will order some chip quick
                                          and try it that way.

                                          Thanks tom66

                                          Comment

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