samsung hpn5039 ax50p3 doesn't power up.

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  • Bob Neely
    Member
    • Oct 2013
    • 41
    • United States

    #1

    samsung hpn5039 ax50p3 doesn't power up.

    Greeting,

    I have this TV that will not power up.

    I took the back off and check for the 5vdc stby voltage on the power supply at connector CN804 and the test point and I am getting 2.9vdc. The PS ON voltage is 1.6vdc on connector CN802.

    When I use the power button on the side of the set I hear a click then a short fizzle sound next to connector CN804. When the TV is originally plugged in there is a red led on the front. When I push the power button it blinks 5 times then it goes out.

    Here are some pics of the power supply.

    Any help would be appreciated.
    Attached Files
  • Bob Neely
    Member
    • Oct 2013
    • 41
    • United States

    #2
    Re: samsung hpn5039 ax50p3 doesn't power up.

    Can anybody help. I would really like to get this off my table.

    Thanks

    Comment

    • Bob Neely
      Member
      • Oct 2013
      • 41
      • United States

      #3
      Re: samsung hpn5039 ax50p3 doesn't power up.

      Changed power supply. Get stby 5vdc getting ps on voltage.
      Checked
      V5D- 5.3vdc .... 2.1vdc
      VG- 15vdc.... 14.8 vdc
      Vscan- 95vdc..... 78vdc
      Vs- 88vdc..... No volts
      Vest....126vdc .... No volts
      Ve..... 115vdc.... No volts
      Va...... 76vdc..... 78vdc

      Can anybody help?

      Comment

      • Alastair E
        Chief Womble
        • Mar 2013
        • 1963
        • U.K.

        #4
        Re: samsung hpn5039 ax50p3 doesn't power up.

        You have no Vs.....

        Check for shorts on the Vs line. Try running with first Y-SUS disconnected from PSU, then X-SUS disconnected from PSU--See if the voltage returns at the PSU with either disconnected.

        If not, then you probably have a faulty replacement PSU.
        TELEFIX

        How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
        http://www.irf.com/technical-info/appnotes/an-1088.pdf
        PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

        Comment

        • Bob Neely
          Member
          • Oct 2013
          • 41
          • United States

          #5
          Re: samsung hpn5039 ax50p3 doesn't power up.

          Thanks Alastair E.

          I did disconnected the X-sus and Y-sus boards after the post. No change. I guess the PSU is bad. I will look for the short on the VS line.

          Anybody know where I can get the schematic for this unit?

          Comment

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