Samsung ue49k6300ak

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  • dick_barton
    Badcaps Legend
    • Aug 2015
    • 6642
    • Wales

    #21
    Re: Samsung ue49k6300ak

    What voltage do you have on both sides of the Tcon smd fuse "F1"
    Willing to help but I'm no expert.

    Comment

    • Davi.p
      Hobbist Tech
      • Sep 2009
      • 4316
      • Italy - Milan

      #22
      Re: Samsung ue49k6300ak

      HI, first of all i guess one very fast spike of voltage has hit your house, fast enough to pass over the entire PSU without damaging glass FUSE/Varistor. Then if you want to make things seriously for me you have to test voltages on tcon 'cause i suspect some robbers have cheat you and you bought a bad tcon. IF you want to put extra efforts of work on this pubblish a clear tcon picture with all serigraphy well visible, then i try to guide you through testing, if not you can buy a new one asking for sure to have it from a broken panel tv. Bye

      Comment

      • oxonater
        Senior Member
        • Oct 2012
        • 77
        • uk

        #23
        Re: Samsung ue49k6300ak

        Hi again

        Ok so I have checked all the voltages on PSU and all were present and correct apart from the od/ud connector (not sure what this is).

        Also with regards to the mainboard and T-con testing I just replaced them with known working ones (although that sometimes is not the case when buying used items).

        Again pretty lazy I did check the mainboard for power and that appear to match the power supply voltages. T-con doesn't appear to have a fuse as such that I could see I have uploaded a pic of it and maybe could be pointed in the right direction for testing.

        Also did notice when running my finger along the TV bezel at the bottom had some weird colours that appeared.

        Other than that the TV still does the same can hear sound no display it's back together at mo so not to sure when I will look at it again!!!
        Attached Files

        Comment

        • vinceroger69
          Badcaps Legend
          • Mar 2012
          • 6714
          • uk

          #24
          Re: Samsung ue49k6300ak

          fuse is above white connector on left hand side marked f1 32v

          Comment

          • Davi.p
            Hobbist Tech
            • Sep 2009
            • 4316
            • Italy - Milan

            #25
            Re: Samsung ue49k6300ak

            There are some testpoints, test with and without all connected:
            VON, VSS, 1.1V, 3,3V, AVDD, HAVDD

            Comment

            • PedroBorges9
              New Member
              • Jan 2020
              • 8
              • United Kingdom

              #26
              Re: Samsung ue49k6300ak

              Hi guys, I just got a tv with the same problem. My HAVDD point does not have any voltage with the tv on, is that normal?

              Comment

              • Davi.p
                Hobbist Tech
                • Sep 2009
                • 4316
                • Italy - Milan

                #27
                Re: Samsung ue49k6300ak

                I retire my guess about bad tcon, in theese newer models ususally something goes bad in the screen section, if one is lucky enough there can be a little cap broken on the small border boards.

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA

                  #28
                  Re: Samsung ue49k6300ak

                  Originally posted by PedroBorges9
                  Hi guys, I just got a tv with the same problem. My HAVDD point does not have any voltage with the tv on, is that normal?
                  That is not normal.
                  Are getting 12VDC on both ends of the fuse on the T-CON board when TV is turned on?
                  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

                  • PedroBorges9
                    New Member
                    • Jan 2020
                    • 8
                    • United Kingdom

                    #29
                    Re: Samsung ue49k6300ak

                    Yes I'm getting voltage of the f1, about 15v on each side.

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #30
                      Re: Samsung ue49k6300ak

                      Originally posted by PedroBorges9
                      Yes I'm getting voltage of the f1, about 15v on each side.
                      15V with ref to chassis ground?
                      Disconnect both ribbon cable between LCD panel and the T-CON and see if you will any Voltage you have listed.
                      BTW, are you sure your DC Voltmeter is OK and accurate since there is no power supply that generates 15VDC so I do not expect to have 15VDC feeding the T-CON?
                      Last edited by budm; 01-23-2020, 05:05 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

                      • Davi.p
                        Hobbist Tech
                        • Sep 2009
                        • 4316
                        • Italy - Milan

                        #31
                        Re: Samsung ue49k6300ak

                        15V on a tcon fuse it can't be heard....!

                        Comment

                        • nomoresonys
                          Badcaps Legend
                          • Jan 2013
                          • 12141
                          • U.S.

                          #32
                          Re: Samsung ue49k6300ak

                          Check some other stuff with your meter, new 9 volt battery or other known voltages.

                          Comment

                          • PedroBorges9
                            New Member
                            • Jan 2020
                            • 8
                            • United Kingdom

                            #33
                            Re: Samsung ue49k6300ak

                            Got a new t-con board to no avail. I noticed that if I unlock and wiggle the flatcable on the motherboardside I can see a bit of the bottom of the display with an arrow pointing down and all.

                            Comment

                            • PedroBorges9
                              New Member
                              • Jan 2020
                              • 8
                              • United Kingdom

                              #34
                              Re: Samsung ue49k6300ak

                              Sorry the F1 is reading 12,74 on both sides with both bottom flatcables disconnected or connected it does't matter.

                              Comment

                              • nomoresonys
                                Badcaps Legend
                                • Jan 2013
                                • 12141
                                • U.S.

                                #35
                                Re: Samsung ue49k6300ak

                                .
                                Last edited by nomoresonys; 01-25-2020, 06:01 AM.

                                Comment

                                • budm
                                  Badcaps Legend
                                  • Feb 2010
                                  • 40746
                                  • USA

                                  #36
                                  Re: Samsung ue49k6300ak

                                  So if the two cables from T-CON to the LCD panel are not connected, you still do not see any Voltages at these test points, VON, VSS, 1.1V, 3,3V, AVDD, HAVDD on the T-CON board?
                                  You never tell us what you get on the old T-CON board when the two ribbon cables to the LCD panel are not connected either.
                                  Last edited by budm; 01-25-2020, 03:06 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

                                  • PedroBorges9
                                    New Member
                                    • Jan 2020
                                    • 8
                                    • United Kingdom

                                    #37
                                    Re: Samsung ue49k6300ak

                                    Reporting back.
                                    point - Ribbons Connected - Ribbons Disconnected
                                    1.1v - 1.1v - 1.1v
                                    2.5v - 2.5v - 2.5v
                                    3.3v - 3.3v - 3.3v
                                    AVDD- 167.5mv - ~167.5
                                    HAVDD- 0 - 0
                                    VON - 177.6mv - 200mv
                                    VSS - 100 -> 55mv - 100 -> 33.9mv

                                    Comment

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA

                                      #38
                                      Re: Samsung ue49k6300ak

                                      Are these the reading of old and new T-CON boards?
                                      So far it is missing important Voltages.
                                      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

                                      • PedroBorges9
                                        New Member
                                        • Jan 2020
                                        • 8
                                        • United Kingdom

                                        #39
                                        Re: Samsung ue49k6300ak

                                        This is with the new one. The old one was the same I think. Which voltages are missing?

                                        Comment

                                        • budm
                                          Badcaps Legend
                                          • Feb 2010
                                          • 40746
                                          • USA

                                          #40
                                          Re: Samsung ue49k6300ak

                                          Originally posted by PedroBorges9
                                          This is with the new one. The old one was the same I think. Which voltages are missing?
                                          These Voltages:they should be way lots higher, for example the AVDD should be 15 ~ 20 VDC.
                                          AVDD- 167.5mv - ~167.5
                                          HAVDD- 0 - 0
                                          VON - 177.6mv - 200mv
                                          VSS - 100 -> 55mv - 100 -> 33.9mv
                                          Last edited by budm; 01-27-2020, 12:56 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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