Panasonic Plasma TX-P50XT50B strange horizontal two lines

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  • Damtom
    Senior Member
    • Dec 2014
    • 57
    • UK

    #21
    Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

    Yes you right , A board was swapped.

    One question I have on my mind.

    Could I cause this , by any of this action , swapping A board or disconnecting ribbons from SN board ??

    Comment

    • tw2005
      Badcaps Legend
      • Oct 2011
      • 6458
      • Australia

      #22
      Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

      Originally posted by Damtom
      Yes you right , A board was swapped.

      One question I have on my mind.

      Could I cause this , by any of this action , swapping A board or disconnecting ribbons from SN board ??
      doubt it. what's vsus set to in that service menu, high or low? can't say I've ever come across burn in panasonic panel before.

      Comment

      • Damtom
        Senior Member
        • Dec 2014
        • 57
        • UK

        #23
        Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

        It was low I just set to high because on low I could see image retention from service menu already !! On high I cant see it

        Comment

        • tw2005
          Badcaps Legend
          • Oct 2011
          • 6458
          • Australia

          #24
          Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

          guess try it on high, I know it's spoken that they have an algorithm that compensates on the A board for the panel aging so i don't know if that would be an issue since it's come from another TV. Still would be interesting to know the hrs stored on the a board.

          Comment

          • tw2005
            Badcaps Legend
            • Oct 2011
            • 6458
            • Australia

            #25
            Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

            Caution:
            When Plasma panel or A-board is replaced, Vsus should be set to LOW or HIGH.
            Procedure
            1. Go into main item [VSUS] in Service Mode. LOW or HIGH will be displayed.
            2. Press [OK] button to go to TEST stage.
            White pattern without On-Screen Display will be displayed during TEST and CONF stage. Press [5] button to display the
            On-Screen Display.
            3. Press [VOL (-)] button to set to LOW.
            4. In LOW setting
            a. If no several dead pixel is visible remarkably in white pattern, press [3] button to go to CONF stage.
            b. If the several dead pixels are visible remarkably in white pattern, Set to HIGH by press [VOL (+)] button. Press [3] button
            to go to CONF stage if the symptom is improved.
            5. Press [OK] button in CONF stage to store LOW or HIGH.
            6. Exit Service Mode by pressing [Power] button.
            Notes:
            Do not overwrite because data is written in Peaks-EEPROM after executing adjustment of V-SUS Voltage.

            Comment

            • tw2005
              Badcaps Legend
              • Oct 2011
              • 6458
              • Australia

              #26
              Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

              on high , what's the voltage of vsus

              Comment

              • Damtom
                Senior Member
                • Dec 2014
                • 57
                • UK

                #27
                Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

                Unfortunately TV is assembled so I can't check voltage.

                Procedure for checking running time , doesn't work on this TV

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #28
                  Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

                  Hm, interesting that increasing Vsus hides the fault. I had a Samsung PS51D450 which had a grey-ish mark on the screen on full white. Turning Vsus up about 5V cleared this. Must be trying to save every watt, at the expense of performance...
                  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

                  • Damtom
                    Senior Member
                    • Dec 2014
                    • 57
                    • UK

                    #29
                    Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

                    There is option in service menu , called 'aging' . how does it work ?

                    Comment

                    • tw2005
                      Badcaps Legend
                      • Oct 2011
                      • 6458
                      • Australia

                      #30
                      Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

                      Originally posted by Damtom
                      Unfortunately TV is assembled so I can't check voltage.

                      Procedure for checking running time , doesn't work on this TV
                      did you get this far minus the hrs displayed?
                      Attached Files

                      Comment

                      • tom66
                        EVs Rule
                        • Apr 2011
                        • 32560
                        • UK

                        #31
                        Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

                        I think that's just the test pattern mode.
                        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

                        • Damtom
                          Senior Member
                          • Dec 2014
                          • 57
                          • UK

                          #32
                          Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

                          Tom66 horizontal thick line are still there.

                          When vsus was set to low I could see IR coming from service menu (white colours of letters) after changing to high , these letters are gone

                          Comment

                          • tw2005
                            Badcaps Legend
                            • Oct 2011
                            • 6458
                            • Australia

                            #33
                            Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

                            Originally posted by Damtom
                            There is option in service menu , called 'aging' . how does it work ?
                            that's the test patterns.

                            keys
                            [1] button...Main items Selection in forward direction
                            [2] button...Main items Selection in reverse direction
                            [3] button...Sub items Selection in forward direction
                            [4] button...Sub items Selection in reverse direction
                            [VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )




                            ALL WHITE Built-in test patterns can be
                            MIDDLE BLUE WITH MAGENTA OUTSIDE FRAME displayed.
                            MIDDLE STEP GREEN
                            MIDDLE STEP RED
                            LOW STEP WHITE
                            ALL BLUE
                            ALL GREEN
                            ALL RED
                            WHITE DIAGONAL STRIPE
                            RED DIAGONAL STRIPE
                            GREEN DIAGONAL STRIPE
                            BLUE DIAGONAL STRIPE
                            A-ZONE & B-ZONE
                            1% WINDOW
                            COLOR BAR
                            9 POINTS BRIGHT MEASURE
                            2 DOT OUTSIDE FRAME
                            DOUBLE FIXED 1% WINDOW
                            VERTICAL LINE SCROLL
                            ON/OFF
                            R/G/B/W ROTATION WITH COUNT DISPLAY
                            HALF FIXED ALL WHITE
                            ALL WHITE WITH COUNT DISPLAY

                            Comment

                            • Damtom
                              Senior Member
                              • Dec 2014
                              • 57
                              • UK

                              #34
                              Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

                              Originally posted by tw2005
                              did you get this far minus the hrs displayed?
                              I have this screen but no time and count on it

                              Comment

                              • tw2005
                                Badcaps Legend
                                • Oct 2011
                                • 6458
                                • Australia

                                #35
                                Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

                                Originally posted by Damtom
                                I have this screen but no time and count on it
                                then have you tried using up,down,left ,right arrows to highlight that field and hold mute?

                                Comment

                                • Damtom
                                  Senior Member
                                  • Dec 2014
                                  • 57
                                  • UK

                                  #36
                                  Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

                                  Oh I didn't try mute , I will check it in two hours and let you know

                                  Comment

                                  • Damtom
                                    Senior Member
                                    • Dec 2014
                                    • 57
                                    • UK

                                    #37
                                    Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

                                    Mute doesn't work , any other ideas ?
                                    Attached Files

                                    Comment

                                    • tw2005
                                      Badcaps Legend
                                      • Oct 2011
                                      • 6458
                                      • Australia

                                      #38
                                      Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

                                      Originally posted by Damtom
                                      Mute doesn't work , any other ideas ?
                                      no, without the exact manual. everything i've read it's mute but maybe it's different on this one or this region. usually just hold mute for more than 3 secs and it populates,

                                      Comment

                                      • Shinju
                                        Badcaps Legend
                                        • Mar 2014
                                        • 1239
                                        • USA

                                        #39
                                        Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

                                        Too much letter box viewing and not enough IR prevention measure taken, that screen burn in will be perminate.

                                        I have a 2012 Samsung plasma with this exact issue i have had it for 8 months and have tried to use Full screen IR tools on and off and the letter box burn in still shows up.

                                        its very miniscule and really only shows on white images but doesn't bother me one bit. I hung it up in the room and haven't thought twice about it since.

                                        Comment

                                        • Damtom
                                          Senior Member
                                          • Dec 2014
                                          • 57
                                          • UK

                                          #40
                                          Re: Panasonic Plasma TX-P50XT50B strange horizontal two lines

                                          Got it in the end.
                                          Attached Files

                                          Comment

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