RCA 32hd31 Power Issue

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  • landyboy
    Badcaps Veteran
    • Apr 2013
    • 443
    • USA

    #1

    RCA 32hd31 Power Issue

    I just picked up a RCA 32HD31. I have 5v on the power board but no other voltage. Tested the Rectifier and the barrier diodes all test good.
    Attached Files
  • landyboy
    Badcaps Veteran
    • Apr 2013
    • 443
    • USA

    #2
    Re: RCA 32hd31 Power Issue

    Power light comes on and no picture with flashlight test. Does the mainboard control the 12v on the power supply or should the 12v be present when supply is on?

    Comment

    • RON_CET
      Badcaps Veteran
      • Jun 2012
      • 217
      • USA

      #3
      Re: RCA 32hd31 Power Issue

      Look at attachment of the image of your board I circled the stand-by transformer.On the bottom side of the board coming from pin 4 Iif memory serves me here you should see a surface mount fuse RB5 looks to have markings on top of "o" which i think is a 2.5 amp smd fuse check see if that is open,
      Attached Files
      Ron Driver,BSEE,CET,ISCET,NESDA

      Comment

      • landyboy
        Badcaps Veteran
        • Apr 2013
        • 443
        • USA

        #4
        Re: RCA 32hd31 Power Issue

        If i am correct I think RB5 would designate a resistor.

        Comment

        • RON_CET
          Badcaps Veteran
          • Jun 2012
          • 217
          • USA

          #5
          Re: RCA 32hd31 Power Issue

          attached schematic for troubleshooting RB5 is listed as 0 ohm on schematic
          Attached Files
          Ron Driver,BSEE,CET,ISCET,NESDA

          Comment

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