MP 42HC56 SINOTEC 42 lcd

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  • dick_barton
    Badcaps Legend
    • Aug 2015
    • 6642
    • Wales

    #41
    Re: MP 42HC56 SINOTEC 42 lcd

    What's the DC voltage across C533?
    Willing to help but I'm no expert.

    Comment

    • SonOfAnarchy ZA
      Member
      • Dec 2016
      • 22
      • South Africa

      #42
      Re: MP 42HC56 SINOTEC 42 lcd

      Originally posted by dick_barton
      What's the DC voltage across C533?
      295v

      Comment

      • dick_barton
        Badcaps Legend
        • Aug 2015
        • 6642
        • Wales

        #43
        Re: MP 42HC56 SINOTEC 42 lcd

        AC input of 222V ac = 222 x 1.414 = 314V dc which is what should be across the "-" & "+" of the bridge rectifier unless C511 & C520 are leaky.
        This would raise the non-boosted V_PFC voltage going to N501 startup input.
        Willing to help but I'm no expert.

        Comment

        • SonOfAnarchy ZA
          Member
          • Dec 2016
          • 22
          • South Africa

          #44
          Re: MP 42HC56 SINOTEC 42 lcd

          Originally posted by dick_barton
          AC input of 222V ac = 222 x 1.414 = 314V dc which is what should be across the "-" & "+" of the bridge rectifier unless C511 & C520 are leaky.
          This would raise the non-boosted V_PFC voltage going to N501 startup input.
          Thank you i will check when I am back at the on monday

          Comment

          • dick_barton
            Badcaps Legend
            • Aug 2015
            • 6642
            • Wales

            #45
            Re: MP 42HC56 SINOTEC 42 lcd

            I think at this point I would replace N501
            Willing to help but I'm no expert.

            Comment

            • SonOfAnarchy ZA
              Member
              • Dec 2016
              • 22
              • South Africa

              #46
              Re: MP 42HC56 SINOTEC 42 lcd

              Originally posted by dick_barton
              I think at this point I would replace N501
              N501 has been replaced already

              Comment

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