Samsung 40" TV LN-T4061FX/XAA bad capacitors

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  • tieny
    Badcaps Veteran
    • Feb 2012
    • 478
    • USA

    #1

    Samsung 40" TV LN-T4061FX/XAA bad capacitors

    Hey guys, so I just bought this samsung 40" LCD TV for 150$. The symptoms were that the TV would only turn on sometimes after constantly clicking the power button. Once the TV is left on for a few minutes, it would easily be able turn off and back on again with no problems. Kind of pricey but I was at least 90% sure it was bad capacitors. Bought the TV, opened it up, and what do you know, lots of bloated samwha capacitors on the power supply!

    Out of the dozen of TVs I've repaired so far this is actually the first one with the "common" capacitor problem I've read about =)

    Now, I'm thinking about using salvaged capacitors with low esr to replace the bloated ones with. Would this be an okay solution as long as the capacitors i use to replace have low esr values even though it may not be a good quality brand?


    EDIT: Hmm, the bloated capacitors seem to be, 10V 1000uf, and 25V 1000uf, I just found a load of salvaged rubycon 25V 1000uf caps. Would it be okay to just replaced all the caps with those rubycons even though some of the caps in the PSU is specified as 10V?
    Attached Files
    Last edited by tieny; 09-05-2012, 08:00 PM.
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Samsung 40" TV LN-T4061FX/XAA bad capacitors

    You should replace just about all of them except the large main caps. I would suggest you to get PANASONIC FM/FR/FC series from Digikey, it will be worth it for 40" TV so you will not have to replace them later on in the future. the 25V one are not too big to fit into the 10V location? The 10V caps are more likely for the 3.3V or 5V power supply section.
    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

    • tieny
      Badcaps Veteran
      • Feb 2012
      • 478
      • USA

      #3
      Re: Samsung 40" TV LN-T4061FX/XAA bad capacitors

      The rubycon 25V caps I actually bought from digikey awhile back for another project I was working on but turned out after recieving my esr meter the caps weren't the real problem so I decided to keep the rubycons.

      The 25V capacitors are the same diameter as the 10V caps but a little taller. All the 10V 1000uf caps tested as leaking (the one leaking the brown stuff surprisingly tested as open circuit) I just replaced all the 10V with 25V caps. The TV is working perfectly now, turns on and off with no problems =)

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: Samsung 40" TV LN-T4061FX/XAA bad capacitors

        That's good.
        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

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