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Lg 60UF7300-UT Display Concern

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    Lg 60UF7300-UT Display Concern

    Picked this up today probably should have known better. Will show pic of screen when I got it home. Took back off and saw a red wire from the PSB disconnected as if it had been pulled out of the harness connector as the pin connector was still in the harness connector that goes to the T-Con. That pin connector is labeled SCLK, ( serial clock)? Anyway it made no difference when connected.

    I know this TV has major concerns with the Main board. I have all the power board voltages and it fires right up and that is all she does. Got the 12 volts to the T-Con. Disconnected each ribbon cable to the LCD and they alternated from white on side and black on the other. Anyone have an idea on this?
    Attached Files

    #2
    Re: Lg 60UF7300-UT Display Concern

    Need better FOCUSED pics. of each board and one of the whole back as to see how they are all connected.

    Comment


      #3
      Re: Lg 60UF7300-UT Display Concern

      Nomoresonys, Hope these pics are good enough.
      Attached Files

      Comment


        #4
        Re: Lg 60UF7300-UT Display Concern

        Check P201: Test the voltages at the connector on the powerboard with EVERYTHING hooked up, it's the connector that the cable from powerboard to mainboard hooks into, most times there's a legend/map nearby that gives the expected voltages, you measure them with your mutimeter, set meter to 20 vdc then report them, put neg probe on chassis metal ground, pos probe on pin of connector, measure in standby take note, leave probes where they are then power on tv and again take note of voltages, report them here, example pin 1-ps-on-0 volts standby-power on-3.3 volts.

        Comment


          #5
          Re: Lg 60UF7300-UT Display Concern

          Where is the red/pink wire connected to in your first photo of the power supply?
          Willing to help but I'm no expert.

          Comment


            #6
            Re: Lg 60UF7300-UT Display Concern

            check white fuse on tcon.

            Comment


              #7
              Re: Lg 60UF7300-UT Display Concern

              Originally posted by dick_barton View Post
              Where is the red/pink wire connected to in your first photo of the power supply?
              missed out "going"
              Willing to help but I'm no expert.

              Comment


                #8
                Re: Lg 60UF7300-UT Display Concern

                Originally posted by dick_barton View Post
                Where is the red/pink wire connected to in your first photo of the power supply?
                It appears it goes to sclk pin which is second from from top because there is a connector pin still in the plug connector.

                Comment


                  #9
                  Re: Lg 60UF7300-UT Display Concern

                  Originally posted by Davi.p View Post
                  check white fuse on tcon.
                  Fuse good, 12v on both sides.

                  Comment


                    #10
                    Re: Lg 60UF7300-UT Display Concern

                    sorry you already told it.. seen the hands already put in i suspect wrong mainboard model..

                    Comment


                      #11
                      Re: Lg 60UF7300-UT Display Concern

                      Originally posted by nomoresonys View Post
                      Check P201: Test the voltages at the connector on the powerboard with EVERYTHING hooked up, it's the connector that the cable from powerboard to mainboard hooks into, most times there's a legend/map nearby that gives the expected voltages, you measure them with your mutimeter, set meter to 20 vdc then report them, put neg probe on chassis metal ground, pos probe on pin of connector, measure in standby take note, leave probes where they are then power on tv and again take note of voltages, report them here, example pin 1-ps-on-0 volts standby-power on-3.3 volts.
                      With TV plugged in not turned on: With TV turned on:
                      Sin=0v Sin=.043v
                      Sclk=0v Sclk=.029v
                      Gnd=v Gnd=.004v
                      24v=0v 24v=25.02v
                      24v=0v 24v=25.02v
                      Gnd=0v Gnd=.004v
                      12v=0v 12v=11.82v
                      12v=0v 12v=11.82v
                      12v=0v 12v=11.82v
                      Gnd=0v Gnd=.004v
                      3.5v=3.5v 3.5v=3.5v
                      3.5v=3.5v 3.5v=3.5v
                      P-Dim=.005v P-Dim=2.639v
                      Pwr_on=0v Pwr_on=3.530v
                      vsync=0v vsync=.018v
                      Gnd=0v Gnd=0v
                      N.C.=0v N.C.=0v
                      Gnd=0v Gnd=.003v
                      24v=0v 24v=25.01v
                      24v=0v 24v=25.01v
                      Gnd=0v Gnd=.003V
                      12v=0v 12v=11.82v
                      12v=0v 12v=11.82v
                      Gnd=0v Gnd=.004v
                      3.5v=3.5v 3.5v=3.5v
                      Gnd=0v Gnd=.004v
                      P-Dim2=.005v P-Dim2=1.718v
                      Drv_on=.002v Drv_on=3.487v

                      Comment


                        #12
                        Re: Lg 60UF7300-UT Display Concern

                        What all sources have you tried hdmi, rca, over the air antenna?

                        Comment


                          #13
                          Re: Lg 60UF7300-UT Display Concern

                          Originally posted by nomoresonys View Post
                          What all sources have you tried hdmi, rca, over the air antenna?
                          I can't get anything on screen but the 10" wide white strip in the middle of the screen and black top and bottom. Remote only turns unit on and off.

                          Comment

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