Sony KDL-40SL140 - T-Con or bad panel?

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  • sansonet
    Badcaps Veteran
    • Nov 2013
    • 236
    • US
    #1

    Sony KDL-40SL140 - T-Con or bad panel?

    Just got this sony KDL-40SL140, it and it has some problems with image - like dark on middle and right corner, service menu shows no problem, but setting are little different ones in service manual (I'm attaching pic of TV service menu and screenshot from manual). Some ghosting on right part of the screen. I did "factory reset" but it didn't fix it. Tested gamma on T-con (got instructions from this tread https://www.badcaps.net/forum/showthread.php?t=33861) - appears to be OK, but I don't get 0V and 15V - it's like 0.5V and 14.8V on first and last test points.
    I had TV with very similar symptoms and replacing AS15 chip fixed it. But gamma didn't test right on that one. This one doesn't have AS15 chip too.
    Attached Files
    Last edited by sansonet; 11-11-2014, 10:37 AM.
    Tags: None
    • sansonet
      Badcaps Veteran
      • Nov 2013
      • 236
      • US
      #2
      Re: Sony KDL-40SL140 - T-Con or bad panel?

      Few more pics - switching from light to dark background shows black screen that slowly moves from middle to right part, ideally it should switch to all black background instantly. Also, after it stayed on for while and warmed up, it started to show normal image (second pic).
      Attached Files

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        • Ltank
          Badcaps Veteran
          • Jun 2013
          • 776
          • USA
          #3
          Re: Sony KDL-40SL140 - T-Con or bad panel?

          Bad Panel due to ribbon cable tab bonding.

            Comment

            • sansonet
              Badcaps Veteran
              • Nov 2013
              • 236
              • US
              #4
              Re: Sony KDL-40SL140 - T-Con or bad panel?

              Can it be fixed permanently? If not, I'll just remove boards and sell them, just not sure about T-con - any chance this t-con can be defective? I don't want sell something that doesn't work.

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK
                  #5
                  Re: Sony KDL-40SL140 - T-Con or bad panel?

                  Agreed on tabs. T-con should be OK.
                  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

                    • sansonet
                      Badcaps Veteran
                      • Nov 2013
                      • 236
                      • US
                      #6
                      Re: Sony KDL-40SL140 - T-Con or bad panel?

                      Thank You! I removed screen today and tried to push on tabs, looks like you are right and pushing last one on the right brings image back to normal, it still kinda too bright, but maybe it is just TV settings or I got used to dark settings I have on my TVs/monitors Still, it's not permanent because tab goes under glass and nothing I can do to fix it, also even after getting normal image, I'm getting 1-2 vertical lines on that part of the screen. I think I'll just recycle boards from this TV.

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