Un55mu630df

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  • fcisolutions
    Badcaps Veteran
    • Jan 2017
    • 205
    • United States

    #1

    Un55mu630df

    Hello I have a Samsung UN55MU630DF television. I have tested the power supply and getting good reading on my voltages. 12.2 and 3.34. I replaced the main board because initially it would not even come on. Now the back lights flash on and off in a cycle. No T-Con but did replace ribbons from main to panel.
  • nomoresonys
    Badcaps Legend
    • Jan 2013
    • 12074
    • U.S.

    #2
    Re: Un55mu630df

    Can you throw up some good clear pics?

    Comment

    • fcisolutions
      Badcaps Veteran
      • Jan 2017
      • 205
      • United States

      #3
      Re: Un55mu630df

      Here are some pictures of the boards.
      Attached Files

      Comment

      • dick_barton
        Badcaps Legend
        • Aug 2015
        • 6642
        • Wales

        #4
        Re: Un55mu630df

        Can you give the voltage readings on the 12 way connector CNM803 (blurry so hard to read) and the legend name alongside it.
        Willing to help but I'm no expert.

        Comment

        • fcisolutions
          Badcaps Veteran
          • Jan 2017
          • 205
          • United States

          #5
          Re: Un55mu630df

          CNM803

          Pin 1 - .01V
          Pin 2 - 3.21V
          Pin 3 - 12.67V
          Pin 4 - 3.47V
          Pin 5 - 12.67V
          Pin 6 - 3.15V
          Pin 7 - 12.67V
          Pin 8 - 4.41V
          Pin 9 - 12.67V
          Pin 10 - .01V
          Pin 11 - .01V
          Pin 12 - .01V

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #6
            Re: Un55mu630df

            Can we please get the name of each pin?
            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

            • dick_barton
              Badcaps Legend
              • Aug 2015
              • 6642
              • Wales

              #7
              Re: Un55mu630df

              Without the legend corresponding to the pin numbers the readings are not much use.
              Attached Files
              Willing to help but I'm no expert.

              Comment

              • fcisolutions
                Badcaps Veteran
                • Jan 2017
                • 205
                • United States

                #8
                Re: Un55mu630df

                This is what I got.
                Attached Files

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA

                  #9
                  Re: Un55mu630df

                  So ALL the control signals are all stable while the Backlights are flashing?
                  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

                  • CapLeaker
                    Leaking Member
                    • Dec 2014
                    • 7964
                    • Canada

                    #10
                    Re: Un55mu630df

                    What happens if you unplug the main board from the PSU, then plug the TV in? Back lights should turn on and stay on.

                    Comment

                    • nomoresonys
                      Badcaps Legend
                      • Jan 2013
                      • 12074
                      • U.S.

                      #11
                      Re: Un55mu630df

                      http://www.shopjimmy.com/samsung-bn4...-led-board.htm picture if thats it.
                      Last edited by nomoresonys; 05-09-2018, 02:23 PM.

                      Comment

                      • fcisolutions
                        Badcaps Veteran
                        • Jan 2017
                        • 205
                        • United States

                        #12
                        Re: Un55mu630df

                        Yes if I unplug the main board from PSU backlights come on and stay on.

                        Comment

                        • nomoresonys
                          Badcaps Legend
                          • Jan 2013
                          • 12074
                          • U.S.

                          #13
                          Re: Un55mu630df

                          Originally posted by fcisolutions
                          CNM803

                          Pin 1 - .01V
                          Pin 2 - 3.21V
                          Pin 3 - 12.67V
                          Pin 4 - 3.47V
                          Pin 5 - 12.67V
                          Pin 6 - 3.15V
                          Pin 7 - 12.67V
                          Pin 8 - 4.41V
                          Pin 9 - 12.67V
                          Pin 10 - .01V
                          Pin 11 - .01V
                          Pin 12 - .01V
                          Try these readings again, need them with tv plugged in and then with power switch activated, see if any change value when you hit power button, report findings.

                          Comment

                          • joecop67
                            New Member
                            • Apr 2013
                            • 8
                            • USA

                            #14
                            Re: Un55mu630df

                            What's going on? I can't start a thread? I don't have permission to check my own stats.

                            Comment

                            • joecop67
                              New Member
                              • Apr 2013
                              • 8
                              • USA

                              #15
                              Re: Un55mu630df

                              It says I have 1 post, but I've made hundreds of the years.

                              Comment

                              • Malachi
                                Badcaps Legend
                                • Dec 2015
                                • 1077
                                • Usa

                                #16
                                Re: Un55mu630df

                                Originally posted by joecop67
                                What's going on? I can't start a thread? I don't have permission to check my own stats.
                                Never mind. Wrong username for this forum. It's Malachi here. Lol

                                Delete.

                                Comment

                                • nomoresonys
                                  Badcaps Legend
                                  • Jan 2013
                                  • 12074
                                  • U.S.

                                  #17
                                  Re: Un55mu630df

                                  Originally posted by fcisolutions
                                  Yes if I unplug the main board from PSU backlights come on and stay on.
                                  .
                                  Last edited by nomoresonys; 05-09-2018, 08:20 PM.

                                  Comment

                                  • nomoresonys
                                    Badcaps Legend
                                    • Jan 2013
                                    • 12074
                                    • U.S.

                                    #18
                                    Re: Un55mu630df

                                    Looks and acts like mainboard but seeing how bad these samasungs are, I think it's the powersupply.
                                    Last edited by nomoresonys; 05-09-2018, 09:22 PM.

                                    Comment

                                    • nomoresonys
                                      Badcaps Legend
                                      • Jan 2013
                                      • 12074
                                      • U.S.

                                      #19
                                      Re: Un55mu630df

                                      Check all your diodes and resistors.

                                      Comment

                                      • budm
                                        Badcaps Legend
                                        • Feb 2010
                                        • 40746
                                        • USA

                                        #20
                                        Re: Un55mu630df

                                        Originally posted by fcisolutions
                                        Yes if I unplug the main board from PSU backlights come on and stay on.
                                        If the backlights come on and stay on without flickering then your power supply board, LED driver and LEDs are OK.
                                        But as I asked in post #9, are your sure that the control Voltages (not the A13V) are stable?
                                        Last edited by budm; 05-09-2018, 09:48 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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