Westinghouse WD48UW4490 Scrambled Video

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  • neilc6
    Badcaps Legend
    • Nov 2015
    • 1550
    • Canada
    #1

    Westinghouse WD48UW4490 Scrambled Video

    This TV has scrambled video on all sources including apps but the on screen display is unaffected. I assumed a bad main board, got a replacement but still have the same issue. It's a 4K panel but has a second board between the main and tcon, a FRC (Frame Rate Control) board. Not familiar with this setup. Can the FRC cause the scrambled video? Animated gif attached (click to animate). Also stock photo of the FRC board.
    Attached Files
    Last edited by neilc6; 08-05-2020, 09:27 PM.
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: Westinghouse WD48UW4490 Scrambled Video

      FRC board can cause video refreshing issue.
      Did you try heating and cooling it and do some Voltage testing yet?
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

        • neilc6
          Badcaps Legend
          • Nov 2015
          • 1550
          • Canada
          #3
          Re: Westinghouse WD48UW4490 Scrambled Video

          I buttoned up the TV thinking the new main board would fix the problems. Will need to open it back up again. It does run clear for awhile so I can try cooling it. Reason I suspected the main (ordered without opening up the TV) is because the on screen menus are fine so it can't be the tcon nor panel.
          Last edited by neilc6; 08-05-2020, 10:00 PM.

            Comment

            • neilc6
              Badcaps Legend
              • Nov 2015
              • 1550
              • Canada
              #4
              Re: Westinghouse WD48UW4490 Scrambled Video

              Got a new FRC board today and no scrambling so far (knock on wood). When I replaced the main board previously, I had the back cover off so suspect a thermal issue with the FRC board. Plus it was a hot day. Cooling it beforehand would also make it run longer before scrambling occurred.

              These newer RCA/Westinghouse models have a redesigned menu and it looks like the backlight level adjusts with the brightness level. Didn't find a backlight setting in the service menu. And none of the picture modes set the backlights to max by default.
              Last edited by neilc6; 08-13-2020, 09:44 PM.

                Comment

                • RinusB
                  Member
                  • Sep 2017
                  • 17
                  • Canada
                  #5
                  Re: Westinghouse WD48UW4490 Scrambled Video

                  The RCA RTU6049 has a similar issue. The TV is good in my cold basement area but with the back on, the image goes black. No backlight and no picture. (tested to make sure)
                  The heatsink on the FRC board goes to 130 degrees (54c) and stays hot after the screen goes off.
                  Everything works great so cooling that chip is an issue.
                  Maybe I get a new FRC board or just replace that IC. I am sure the issue is one and the same.

                    Comment

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