Pc43f4500

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  • sordids999
    Badcaps Legend
    • May 2013
    • 2149
    • uk

    #1

    Pc43f4500

    hello guys

    another tv im looking trying to fix

    to the left of the screen in the middle im getting mal-charge a small line of red-green speckles and sometimes top left a batch of green speckles,the tv keeps restarting i was told by the previous owner but she only was using aerial connection(which i dont use) but i have tried scart and hdmi nothing yet
    i have uploaded pictures in the service mode via SVC and i have loads of failures

    my readings are the following:

    VS 205 Volts
    VA 56 Volts
    VSCAN -187 Volts
    SVT_VS 205 Volts
    SVT_XOUT 81.6 Volts

    legend readings on PSU

    PIN 1 : 15V 15.1 Volts
    PIN 2 : GND
    PIN 3 : OUT-A 79.1 Volts
    PIN 4 : OUT-A 79.1 Volts
    PIN 5 : OUT-A 79.1 Volts
    PIN 6 : VS 205 Volts

    PIN 1 XS 0.0 Volts
    PIN 2 DRV_RESET 0.04 Volts
    PIN 3 XG 0.67 Volts
    PIN 4 VS_S SIGNAL 1.53 Volts
    PIN 5 DS_RESET 0.04 Volts
    PIN 6 VS_ON 3.23 Volts
    PIN 7 GND
    PIN 8 GND
    PIN 9 5.3=5.16 Volts
    PIN 10 5.3=5.16 Volts
    PIN 11 VA 57.8 Volts
    PIN 12 VA 57.8 Volts
    PIN 13 GND
    PIN 14 STBY=5.20 Volts
    PIN 15 PS_ON 0.03 Volts
    PIN 16 15.0=15.39 Volts
    PIN 17 GND
    PIN 18 5.3=5.19 Volts
    PIN 19 5.3=5.19 Volts
    PIN 20 5.3=5.19 Volts
    PIN 21 GND
    PIN 22 15.0=15.39 Volts
    Attached Files
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Pc43f4500

    Can you upload a photo of the full screen showing the defect? On a picture or normal TV (try using Self Diagnosis feature in user menu)
    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

    • sordids999
      Badcaps Legend
      • May 2013
      • 2149
      • uk

      #3
      Re: Pc43f4500

      https://www.youtube.com/watch?v=B12h3q2MiCs

      hope you can see this video with the fault tom becuase it goes after 5 mins roughly with just a slight line of pixels showing
      Last edited by sordids999; 02-03-2015, 10:35 AM.

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #4
        Re: Pc43f4500

        That's an odd fault not seen that before, would be tempted to suggest Y-buffer (or Y-main - all in one board)

        As for the FAILUREs, have you tried a factory reset?
        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

        • sordids999
          Badcaps Legend
          • May 2013
          • 2149
          • uk

          #5
          Re: Pc43f4500

          tried a factory reset but still getting the failures

          Comment

          • sordids999
            Badcaps Legend
            • May 2013
            • 2149
            • uk

            #6
            Re: Pc43f4500

            tom if i turn down the Vscan pot down so the voltage measures -181 but on the panel it should be -190 would this matter because the mal-charge is gone at -181 ?

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK

              #7
              Re: Pc43f4500

              It should be fine; that's not the first time I've seen a Samsung with maldischarge issues despite being very new. But, I would try lowering Vs a few volts (max 5V), and see if you can set Vscan back to factory, or you may see other effects on the image.
              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

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #8
                Re: Pc43f4500

                The failures -may- be normal; it could simply mean they haven't been tested yet. I'd check everything else seems to be working. I seem to recall that most Samsung show "T-con USB download: Failure", regardless of fault.
                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

                • sordids999
                  Badcaps Legend
                  • May 2013
                  • 2149
                  • uk

                  #9
                  Re: Pc43f4500

                  ok set VS to 198 volts but Vscan is still -181 volts but images look ok at the moment

                  Comment

                  • tom66
                    EVs Rule
                    • Apr 2011
                    • 32560
                    • UK

                    #10
                    Re: Pc43f4500

                    198 is a little low you might get issues on high brightness. Make sure you get no pink tint on a white screen (use Paint to make full colours, or service menu test patterns)
                    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

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