possible timing control fault with Samsung LE37M87BD

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  • Mikeyboy2007
    Badcaps Veteran
    • Mar 2013
    • 745
    • Scotland

    #1

    possible timing control fault with Samsung LE37M87BD

    hi guys i had a problem with a Samsung LE37M87BD where it was coming on etc but colours where all inverted and stuff so i have had this issue with samsung before with the AS-15 chips on the Tcon so decided to order a new Tcon board, i replaced last night and it is still doing the same thing. could this be a faulty Tcon again as seller advertised on listing that it was confirmed working ?
  • Mikeyboy2007
    Badcaps Veteran
    • Mar 2013
    • 745
    • Scotland

    #2
    Re: possible timing control fault with Samsung LE37M87BD

    also when tv screen is supposed to be black or blue (cant remember) ie if you unplug source while on that channel the screen goes yellow.

    Comment

    • sordids999
      Badcaps Legend
      • May 2013
      • 2149
      • uk

      #3
      Re: possible timing control fault with Samsung LE37M87BD

      Have you tested the Tcon Board test points ?

      Comment

      • selldoor
        Slow Learner
        • Dec 2010
        • 7870

        #4
        Re: possible timing control fault with Samsung LE37M87BD

        Originally posted by Mikeyboy2007
        also when tv screen is supposed to be black or blue (cant remember) ie if you unplug source while on that channel the screen goes yellow.
        If the source is hdmi you will wreck the hdmi controller chip doing that.
        It is not pnp.
        Please upload pictures using attachment function when ask for help on the repair
        http://www.badcaps.net/forum/showthread.php?t=39740

        Comment

        • Mikeyboy2007
          Badcaps Veteran
          • Mar 2013
          • 745
          • Scotland

          #5
          Re: possible timing control fault with Samsung LE37M87BD

          ahh ok selldoor thanks for the info i didnt realise that. do that all the time aswell.... and i will test Tcon board points and post results later, thanks

          Comment

          • mmartell
            Badcaps Legend
            • Oct 2013
            • 3189
            • Canada

            #6
            Re: possible timing control fault with Samsung LE37M87BD

            Originally posted by selldoor
            If the source is hdmi you will wreck the hdmi controller chip doing that.
            It is not pnp.
            Hdmi has hot swap detect so why do you say that you can't or shouldn't do it ?

            Comment

            • goontron
              5000!
              • Dec 2011
              • 4108
              • US

              #7
              Re: possible timing control fault with Samsung LE37M87BD

              Originally posted by selldoor
              If the source is hdmi you will wreck the hdmi controller chip doing that.
              It is not pnp.
              err, i beg to differ.
              HPD
              The HPD (Hot-Plug-Detect) feature is a communication mechanism between a source and a sink device that makes the source device aware that it has been connected/disconnected to/from the sink device. When an HDMI cable is inserted between the two devices, the resulting hot-plug detection instantiates a start-up communication sequence. The EDID information stored in the sink device gets read by the source device though the DDC bus, and the source device typically presents itself on the CEC link and requests basic status information from the sink device such as its power status as well as other devices on the HDMI chain.
              http://www.ni.com/white-paper/12680/en/
              Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....

              "Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me

              Excuse me while i do something dangerous


              You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.

              Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore

              Follow the white rabbit.

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #8
                Re: possible timing control fault with Samsung LE37M87BD

                HDMI is plug and play. One of my jobs at work is to hot-plug set top boxes on as many TVs as possible.

                @Mikey, I doubt the seller ever tested their boards. This fault is so common that someone may well have smashed their TV over it, hence the faulty board.
                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

                • selldoor
                  Slow Learner
                  • Dec 2010
                  • 7870

                  #9
                  Re: possible timing control fault with Samsung LE37M87BD

                  Originally posted by tom66
                  HDMI is plug and play. One of my jobs at work is to hot-plug set top boxes on as many TVs as possible.
                  .
                  Is that to retrotest if the plug and play works?

                  http://www.google.co.uk/url?url=http...oK3RcC828kbwXA
                  Please upload pictures using attachment function when ask for help on the repair
                  http://www.badcaps.net/forum/showthread.php?t=39740

                  Comment

                  • tom66
                    EVs Rule
                    • Apr 2011
                    • 32560
                    • UK

                    #10
                    Re: possible timing control fault with Samsung LE37M87BD

                    Originally posted by selldoor
                    Is that to retrotest if the plug and play works?
                    Yes all our boxes work plug and play. I tested nearly 25 the other day, Samsung 4K 55" LCD to 16" 720p off-brand Technika one. They all worked. They also survive very high ESD events.
                    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

                    • selldoor
                      Slow Learner
                      • Dec 2010
                      • 7870

                      #11
                      Re: possible timing control fault with Samsung LE37M87BD

                      Ok - maybe the hdmi spec has been improved on both TVs and sources
                      and on cables. Me - luddite - dont trust them

                      @Goontron - you are assuming manufacturers adhere to the specifications and controls.
                      There is one manufacturer in the UK/Europe who seem to send stuff out to the unsuspecting public
                      for testing
                      Last edited by selldoor; 11-15-2014, 10:06 AM.
                      Please upload pictures using attachment function when ask for help on the repair
                      http://www.badcaps.net/forum/showthread.php?t=39740

                      Comment

                      • goontron
                        5000!
                        • Dec 2011
                        • 4108
                        • US

                        #12
                        Re: possible timing control fault with Samsung LE37M87BD

                        Originally posted by selldoor
                        Ok - maybe the hdmi spec has been improved on both TVs and sources
                        and on cables. Me - luddite - dont trust them

                        @Goontron - you are assuming manufacturers adhere to the specifications and controls.
                        There is one manufacturer in the UK/Europe who seem to send stuff out to the unsuspecting public
                        for testing
                        everything i have seems to comply. both HDMI capable graphics cards i have, my DVD and blu ray player, TV, sound system, etc. all comply. maybe a different story in other parts of the world though.
                        Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....

                        "Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me

                        Excuse me while i do something dangerous


                        You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.

                        Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore

                        Follow the white rabbit.

                        Comment

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