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    #21
    Re: samsung un55f7100 clicking led flash

    Let me know if you need anything else from me, Im trying my best but now the powers out, summertime started in florida
    Attached Files

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      #22
      Re: samsung un55f7100 clicking led flash

      There 5 left side LED strings and 5 Right side LED strings.
      Each string has + and - label for each pin.
      I.E.
      L1 + , L1 -
      L2 +, L2 -
      ..........
      R1+, R1-
      R2+, R2-
      ...........
      on and on and on..........
      So it should have 20 readings.

      You reports do no make any sense to me:
      L1 27.5v
      l2 56.5
      L3 56.5
      L4 56.5
      L5 27.5

      R1 27.5
      R2 56.5
      R3 56.5
      R4 56.5
      R5 27.5


      You also reported that the backlights are flashing them those numbers should be jumping around which is what we are trying to find out.
      And since the power relay is clicking then I do not expect the Voltages from the power supply board to be steady either. For the relay to be clicking on and off I would expect either the standby power supply is not stable or the PS-ON from the main board is not stable, but you reported that all the Voltages checked OK which does not making any sense if the power relay is clicking on and off.
      Last edited by budm; 05-05-2019, 10:11 PM.
      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


        #23
        Re: samsung un55f7100 clicking led flash

        Originally posted by budm View Post
        There 5 left side LED strings and 5 Right side LED strings.
        Each string has + and - label for each pin.
        I.E.
        L1 + , L1 -
        L2 +, L2 -
        ..........
        R1+, R1-
        R2+, R2-
        ...........
        on and on and on..........
        So it should have 20 readings.

        You reports do no make any sense to me:
        L1 27.5v
        l2 56.5
        L3 56.5
        L4 56.5
        L5 27.5

        R1 27.5
        R2 56.5
        R3 56.5
        R4 56.5
        R5 27.5


        You also reported that the backlights are flashing them those numbers should be jumping around which is what we are trying to find out.
        Sorry bud, Im sure this is annoying as hell for you, this isnt my field at all.. the numbers I posted are the LED tester voltage when running them induvidually, I havent been able to power on the unit since yesterday and our power just came back on..

        https://www.amazon.com/0-320V-Output...79704832&psc=1

        Im using on of these to test the strips and check for bad LEDS without taking the panel off..

        Comment


          #24
          Re: samsung un55f7100 clicking led flash

          You just have to have check all 10 LED strings by disconnecting the LED connectors from the power supply board and test each string.
          I.E. Red probe to 1+, Black probe to 1- and record the Voltage readings as shown on the LED tester.
          At this point we do not know if the power supply, main board, or the LED backlights are causing the power relay to click on/off or not, but I do expect the backlights to come on and stay on when the cable between the main board and the power supply is disconnected.
          When the the cable between the main board and the power supply is disconnected I also expect the relay to come on and stay on and the DC Voltage measured between the two legs of the main filter caps (the two big lystics caps rated 450VDC laying on the sides) in the hot side to be about 380 ~ 400VDC if the board has pull-up resistors for the PS-ON and and the BL-ON pins.
          At this point you also need to report the Voltage on the connector of the power supply that goes to the main board when the TV is working and when it is not working, there are labels for each pin so make sure to put down the pin name and follow by the reading for each pin so we can easily see what are missing.
          Last edited by budm; 05-05-2019, 10:51 PM.
          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


            #25
            Re: samsung un55f7100 clicking led flash

            OK i pulled the panel, any tips of how to test? they are the side emitting ones

            Comment


              #26
              Re: samsung un55f7100 clicking led flash

              Read post 24.
              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


                #27
                Re: samsung un55f7100 clicking led flash

                OK, I tested every single LED, and they are all working perfect, they all draw the same amps and volts.. I reset the 2 plugs on the leds just to make sure they arent the issue

                Comment


                  #28
                  Re: samsung un55f7100 clicking led flash

                  Should I pull the caps and test them? Its gonna take me a solid hour or so to put the panel back in the housing

                  Comment


                    #29
                    Re: samsung un55f7100 clicking led flash

                    Originally posted by Brucetafer View Post
                    OK, I tested every single LED, and they are all working perfect, they all draw the same amps and volts.. I reset the 2 plugs on the leds just to make sure they arent the issue
                    How do you read the amps when your LED tester does not have amp meter, it only has Volt meter to read the totla Vf of each LED string?
                    What are the Voltage reading for each string?
                    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


                      #30
                      Re: samsung un55f7100 clicking led flash

                      I have a bench power supply, the voltage readings for the strings with the led tester is

                      L1 27.5v
                      l2 56.5
                      L3 56.5
                      L4 56.5
                      L5 27.5

                      R1 27.5
                      R2 56.5
                      R3 56.5
                      R4 56.5
                      R5 27.5

                      do you want me to test each string with my bench supply?

                      Comment


                        #31
                        Re: samsung un55f7100 clicking led flash

                        so if i unplug the main board, the leds should light

                        im dumb, I thought if you unplug the power supply from everyhitn it should be in standby mode, mine is just clicking over and over..
                        Last edited by Brucetafer; 05-05-2019, 11:59 PM.

                        Comment


                          #32
                          Re: samsung un55f7100 clicking led flash

                          Originally posted by Brucetafer View Post
                          so if i unplug the main board, the leds should light

                          im dumb, I thought if you unplug the power supply from everyhitn it should be in standby mode, mine is just clicking over and over..
                          Well that clicking of the relay has to be fixed first.
                          With the connector still unplug from the main board, you need to report the Voltage reading of each pin of the connector on the power supply board that goes to the main board.
                          Make sure to put down pin name and follow by the Voltage reading for each pin.
                          Most of the Samsung power supply board has pull-up resistors for performing self test when it is not connected to the main board.
                          BTW, what do the LED strips look like? I am trying to find out why LED L1, L5, R1, and R5 has Vf about half of the other LED strips.
                          Last edited by budm; 05-06-2019, 12:09 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


                            #33
                            Re: samsung un55f7100 clicking led flash

                            All voltages are when its clicked on for that split second

                            1 11
                            2 12
                            3 11
                            4 1
                            5 1
                            6 1
                            7 1
                            8 1
                            9 0
                            10 1
                            11 11
                            12 1
                            13 12
                            14 12
                            15 10
                            16 1.2
                            17 12
                            18 0
                            19 0
                            20 0
                            21 5.3
                            22 5.3 constant
                            23 5.3
                            24 1 constant

                            Comment


                              #34
                              Re: samsung un55f7100 clicking led flash

                              I have no ideas what those pins are for to tell what the Voltage should be for each one of those pin since there are no pin names shown as instructed.
                              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


                                #35
                                Re: samsung un55f7100 clicking led flash

                                Originally posted by budm View Post
                                I have no ideas what those pins are for to tell what the Voltage should be for each one of those pin since there are no pin names shown as instructed.
                                sorry the picture didnt upload..
                                1 B13v
                                2 Vamp
                                3 B13v
                                4 PWM5
                                5 OD_LE
                                6 PWM4
                                7 OD_ON
                                8 PWM3
                                9 GND
                                10 PWM2
                                11 B13v
                                12 PWM1
                                13 B13v
                                14 B13v
                                15 Vamp
                                16 BLU_ON
                                17 Vamp
                                18 GND
                                19 GND
                                20 GND
                                21 B5v
                                22 A5v
                                23 B5v
                                24 PS_ON
                                Attached Files
                                Last edited by Brucetafer; 05-06-2019, 11:19 AM.

                                Comment


                                  #36
                                  Re: samsung un55f7100 clicking led flash

                                  Please edit your post #33 and put the names on those pins, I am not going to look at the glared picture to figure out what each pin is and then write them down and post for others to see.
                                  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


                                    #37
                                    Re: samsung un55f7100 clicking led flash

                                    1 B13v 11
                                    2 Vamp 12
                                    3 B13v 11
                                    4 PWM5 1
                                    5 OD_LE 1
                                    6 PWM4 1
                                    7 OD_ON 1
                                    8 PWM3 1
                                    9 GND
                                    10 PWM2 1
                                    11 B13v 11
                                    12 PWM1 1
                                    13 B13v 12
                                    14 B13v 12
                                    15 Vamp 10
                                    16 BLU_ON 1.2
                                    17 Vamp 12
                                    18 GND
                                    19 GND
                                    20 GND
                                    21 B5v 5.3
                                    22 A5v 5.3 constant
                                    23 B5v 5.3
                                    24 PS_ON 1 constant

                                    Comment


                                      #38
                                      Re: samsung un55f7100 clicking led flash

                                      Originally posted by Brucetafer View Post
                                      1 B13v 11
                                      2 Vamp 12
                                      3 B13v 11
                                      4 PWM5 1
                                      5 OD_LE 1
                                      6 PWM4 1
                                      7 OD_ON 1
                                      8 PWM3 1
                                      9 GND
                                      10 PWM2 1
                                      11 B13v 11
                                      12 PWM1 1
                                      13 B13v 12
                                      14 B13v 12
                                      15 Vamp 10
                                      16 BLU_ON 1.2
                                      17 Vamp 12
                                      18 GND
                                      19 GND
                                      20 GND
                                      21 B5v 5.3
                                      22 A5v 5.3 constant
                                      23 B5v 5.3
                                      24 PS_ON 1 constant
                                      Thanks for putting down the pin names, it is so much easier to see what you have, the PS-ON is present so the switched B5V and switched B13V are on and running.
                                      So those readings above are done without the cable going to the main board attached, corrected?
                                      And is the relay still clicking at this state?
                                      Last edited by budm; 05-06-2019, 09:52 PM.
                                      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


                                        #39
                                        Re: samsung un55f7100 clicking led flash

                                        thats with nothing connected and clicking about once every 1.5-2 seconds.. its on for maybe 200ms then off for the rest..

                                        Comment


                                          #40
                                          Re: samsung un55f7100 clicking led flash

                                          Just to be sure, the clicking sound is from the black relay (with F3PA005V) printing on it, correct?
                                          And you do have about 380 ~ 400VDC between the two legs of the main filter caps that I asked before in post #24.
                                          Last edited by budm; 05-06-2019, 11:33 PM.
                                          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

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