Replace PSU Heat Shield or Not?

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  • johnboy1313
    Badcaps Legend
    • Nov 2012
    • 1959
    • USA

    #1

    Replace PSU Heat Shield or Not?

    This Samsung LN52A750 had a heat shield over the PSU. Should I put it back on or not?
    Attached Files
  • johnboy1313
    Badcaps Legend
    • Nov 2012
    • 1959
    • USA

    #2
    Re: Replace PSU Heat Shield or Not?

    Pic of the shield.
    Attached Files

    Comment

    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK

      #3
      Re: Replace PSU Heat Shield or Not?

      It's not a heat shield, it is an EMI shield. It's not critical and it may run cooler without it, but it will not be FCC compliant any more. I doubt it matters to you.
      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

      • johnboy1313
        Badcaps Legend
        • Nov 2012
        • 1959
        • USA

        #4
        Re: Replace PSU Heat Shield or Not?

        It's not really if it matters to me. It's if it matters to whoever buys the tv. I'm selling it to a close friend of mine and I'd prefer that it doesn't hassle him.

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #5
          Re: Replace PSU Heat Shield or Not?

          I don't see it mattering.
          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

          • johnboy1313
            Badcaps Legend
            • Nov 2012
            • 1959
            • USA

            #6
            Re: Replace PSU Heat Shield or Not?

            Right on, thanks

            Comment

            • T30M31
              Senior Member
              • Feb 2014
              • 58
              • USA

              #7
              Re: Replace PSU Heat Shield or Not?

              It may matter if your friend or any of his neighbors use medium wave or shortwave radio receivers. The shield will reduce the emission of signals that may cause harmful interference to these receivers. This would include receivers for the AM broadcast band, shortwave broadcast bands, amateur/ham radio bands, and citizens band.

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #8
                Re: Replace PSU Heat Shield or Not?

                Originally posted by T30M31
                It may matter if your friend or any of his neighbors use medium wave or shortwave radio receivers. The shield will reduce the emission of signals that may cause harmful interference to these receivers. This would include receivers for the AM broadcast band, shortwave broadcast bands, amateur/ham radio bands, and citizens band.
                This is a good point, but do remember that the most common sources of interference aren't unshielded SMPS like this (the noise rarely extends beyond 1MHz, which only just enters radio bands) but poorly designed transmitters, leaky LO from crappy receivers, and those Chinese computer PSUs with absolutely no line filtering at all.

                This shield probably just added a few dBs attenuation and got them into the OK band.
                Last edited by tom66; 04-04-2014, 07:27 AM.
                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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