Rca 42pa30rq

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  • bjorkson
    Senior Member
    • Apr 2012
    • 127
    • USA
    #1

    Rca 42pa30rq

    Pick up a RCA 42PA30RQ plasma TV. Turn on the power button, the led light turns from red to blue, nothing comes on. I measure my voltage across my Y-main.

    Here's my reading on my Y-main. Getting the same on my X-main aslo, since they are both wired in series.

    Va=0, should be 55
    Vsc=6, should be 193
    Vs=6, should be 207

    So, do you think my Y-main is bad, or my PSU is bad since it's not outputting the correct voltage to my Y-main board? I check the PSU, seen all intact, fuse looks good also. Please advised. Thx
    Tags: None
    • capkid
      Badcaps Legend
      • Oct 2010
      • 1339
      • United States
      #2
      Re: Rca 42pa30rq

      There are quite a few threads about this TV and other similar Samsung-based TVs, so you may want to search the forum to gain more insight. The PSUs in these TVs rarely fail (I never ran into one in the five I worked).

      (1) Try disconnecting the X-main - check PSU voltages. If PSU voltages are normal replace the X-main.
      (2) If PSU voltages are still abnormal after step 1, disconnect Y-main from PSU. If PSU voltages are now normal, replace Y-main. I'd recommend replacing the Y-buffer as a precautionary measure, but they don't fail much. X-main may also be bad - check components on heat sinks for failures. If X-main components are bad, replace X-main.

      Note: Don't attempt to replace individual components on bad boards.
      LG Plasma Mal-Discharge Correction Service

        Comment

        • bjorkson
          Senior Member
          • Apr 2012
          • 127
          • USA
          #3
          Re: Rca 42pa30rq

          Ok...let me try that tomorrow and see what I get. Will report back with my results. Thanks for your help.

            Comment

            • bjorkson
              Senior Member
              • Apr 2012
              • 127
              • USA
              #4
              Re: Rca 42pa30rq

              OK...unhook the Ymain, unchanged on the voltage, unhook the Xmain, now I get 3v on my Va, instead of the initial 0 v. So, you think my X-main is the bad board? Nothing else changes.

                Comment

                • bjorkson
                  Senior Member
                  • Apr 2012
                  • 127
                  • USA
                  #5
                  Re: Rca 42pa30rq

                  Been reading some of the treads on this TV. I do not get a click on my relays when I turn the tv on, and there is no led light coming on on my main board also. So, could I have a bad PSU? or bad y/x main causing the PSU to shut down?

                    Comment

                    • capkid
                      Badcaps Legend
                      • Oct 2010
                      • 1339
                      • United States
                      #6
                      Re: Rca 42pa30rq

                      You could try ruling out the control board or main board: https://www.badcaps.net/forum/showpo...22&postcount=2
                      LG Plasma Mal-Discharge Correction Service

                        Comment

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