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Ps64e8000 powersupply troubleshoot

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    Ps64e8000 powersupply troubleshoot

    hi i have bn44-00516a power supply out of a samsung ps64e8000 tv which transistor failures in the pfc circuit and the main switchmode supply ic failed taking some tracks with them and the tv has some missing smd caps which i do not know the value of cx814 and cx812 cx813
    and the smd cap cx826 which goes the across the switchmode ic is missing also but i need to know where the track that runs between it goes as it has partialiy missing peice where the red line is the track under cap to either one of those pins seen in the picture can anyone help
    Attached Files

    #2
    Re: Ps64e8000 powersupply troubleshoot

    You have to take closer, and clearer pictures of the board. Yours are to blurry when we zoom in.

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      #3
      Re: Ps64e8000 powersupply troubleshoot

      in this image i know where yellow trace goes to but trace going underneath the missing cap i don't know if it take the path of the blue line or the red line
      Attached Files

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        #4
        Re: Ps64e8000 powersupply troubleshoot

        Go to shopjimmy.com and stick your power supply model number, they have a decent high res photo, albeit slightly obscured by glue.

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          #5
          Re: Ps64e8000 powersupply troubleshoot

          thanks have looked not much help thanks anyway

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            #6
            Re: Ps64e8000 powersupply troubleshoot

            Originally posted by ant17 View Post
            in this image i know where yellow trace goes to but trace going underneath the missing cap i don't know if it take the path of the blue line or the red line
            The correct path is the red line, that is the vcc for pin4 of the ic

            What are you using for a solder iron?
            Last edited by R_J; 10-04-2022, 05:49 PM.

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              #7
              Re: Ps64e8000 powersupply troubleshoot

              Look at the datasheet, it has a wiring diagram.
              Attached Files
              Last edited by lotas; 10-04-2022, 06:12 PM.

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                #8
                Re: Ps64e8000 powersupply troubleshoot

                ok guys thanks i started this repair a few years and was using a yihua soldering iron which got me into trouble in the first place a forgot about until recently dough it out again i am now using a jbc dde soldering station

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                  #9
                  Re: Ps64e8000 powersupply troubleshoot

                  Based on a similar schematic BN44-00445C, that uses a ICE3BR1065JF
                  CX814 = 474/16v (1608) pin3
                  CX812 = 104/50v (1608) pin4
                  CX813 = 103/50v (1608) pin6

                  There is an electrolytic cap (CM802?) on the vcc line, it should be replaced as well, and CM801 could be also be weak.
                  Last edited by R_J; 10-04-2022, 06:40 PM.

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                    #10
                    Re: Ps64e8000 powersupply troubleshoot

                    thank you guys this most helpful

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