Panasonic TC-P42X2

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  • IamCanadian
    Senior Member
    • Nov 2012
    • 119
    • Canada

    #1

    Panasonic TC-P42X2

    Just got the tv delivered, Red led on solid. off and on again after holding power button for 3 seconds..

    Any thoughts? while I take the back off?
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Panasonic TC-P42X2

    Count the blinks from the LED. May only be one blink.
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

    Comment

    • IamCanadian
      Senior Member
      • Nov 2012
      • 119
      • Canada

      #3
      Re: Panasonic TC-P42X2

      No blinks at all, going to check for stb power and pwr on signal.

      Comment

      • IamCanadian
        Senior Member
        • Nov 2012
        • 119
        • Canada

        #4
        Re: Panasonic TC-P42X2

        I am working off of a TC-P42S2 training manual for now, I would think it should be close to the same.

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #5
          Re: Panasonic TC-P42X2

          If you have red light, you have stby power.
          I am trying to find the manual for you.
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

          Comment

          • IamCanadian
            Senior Member
            • Nov 2012
            • 119
            • Canada

            #6
            Re: Panasonic TC-P42X2

            Ok, Also when I plug it in, red light comes on solid for about 5 seconds and then rapidly flashes for about 30 seconds. and I do hear relays when cord is first pluged in.

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK

              #7
              Re: Panasonic TC-P42X2

              Red light goes green flashing, or flashes red? If it flashes red, you need to count exactly how many times. The TV is trying to tell you where the fault is.

              I have found the manual and will shortly upload it.
              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #8
                Re: Panasonic TC-P42X2

                Manual:
                http://www.tgohome.com/ServiceManual...&Search=Submit

                Page 17 has your blink codes.
                Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                Comment

                • IamCanadian
                  Senior Member
                  • Nov 2012
                  • 119
                  • Canada

                  #9
                  Re: Panasonic TC-P42X2

                  It is for sure not a fault code, it is red, and flashes about 150 times with no gaps.
                  Thanks for the manual, I will report back soon with pics.

                  Comment

                  • tom66
                    EVs Rule
                    • Apr 2011
                    • 32560
                    • UK

                    #10
                    Re: Panasonic TC-P42X2

                    Very odd. Try in a dark room -- maybe panel is lit up but has no video?
                    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                    Comment

                    • IamCanadian
                      Senior Member
                      • Nov 2012
                      • 119
                      • Canada

                      #11
                      Re: Panasonic TC-P42X2

                      I will try....but Their is no real reaction when the power button is pressed.

                      Comment

                      • IamCanadian
                        Senior Member
                        • Nov 2012
                        • 119
                        • Canada

                        #12
                        Re: Panasonic TC-P42X2

                        the problem seems to be in the A board on the 15v side of things.
                        When a6 is unpluged the PSU stays on showing all the right voltages.

                        Comment

                        • IamCanadian
                          Senior Member
                          • Nov 2012
                          • 119
                          • Canada

                          #13
                          Re: Panasonic TC-P42X2

                          On more testing, It gives codes until any part of the SN has a power plug on it.
                          Almost like the PSU kicks out so fast with the SN plugged in the a board just cant make a fault code for it. Does that sound right?

                          Comment

                          • tom66
                            EVs Rule
                            • Apr 2011
                            • 32560
                            • UK

                            #14
                            Re: Panasonic TC-P42X2

                            Sounds like a dead short SN. Check across SN power connector; should be >10kohm.
                            Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                            For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                            Comment

                            • IamCanadian
                              Senior Member
                              • Nov 2012
                              • 119
                              • Canada

                              #15
                              Re: Panasonic TC-P42X2

                              I pulled all the boards so I can do a better test, Broken leg makes it hard to shuffle around the tv,
                              Anyway, it is the SS board with a dead short, On p11 vsus shows dead short 15v is ok.
                              on SN3 all show as short. What should I start looking at?

                              Comment

                              • tom66
                                EVs Rule
                                • Apr 2011
                                • 32560
                                • UK

                                #16
                                Re: Panasonic TC-P42X2

                                Do you know how to test a MOSFET? This board primarily uses IGBT and MOSFET. They can all be tested like a MOSFET.

                                Also what is the part number. Should be something like TNPAxxxx. Sometimes the SS can be cheap enough that replacing it works out better than repairing it.

                                P.S. Most Panasonic TVs can be mounted on the floor stand and serviced upright (good design!) Ask a friend to help. Get well soon with the leg!
                                Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                Comment

                                • IamCanadian
                                  Senior Member
                                  • Nov 2012
                                  • 119
                                  • Canada

                                  #17
                                  Re: Panasonic TC-P42X2

                                  PN is TPNA5072.
                                  To test a MOSFET put neg lead on source, POS on gate to charge it, move pos to drain, should be a low reading. Touch the leads with your finger to discharge and reading should go high.

                                  That is how I was told, do you have a better method?

                                  P.S. The guy forgot the stand, but is bringing it later today

                                  Comment

                                  • tom66
                                    EVs Rule
                                    • Apr 2011
                                    • 32560
                                    • UK

                                    #18
                                    Re: Panasonic TC-P42X2

                                    No, you can just test across source and drain for shorts.
                                    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                    Comment

                                    • IamCanadian
                                      Senior Member
                                      • Nov 2012
                                      • 119
                                      • Canada

                                      #19
                                      Re: Panasonic TC-P42X2

                                      out of circuit right? or can I just lift the S leg?

                                      Comment

                                      • IamCanadian
                                        Senior Member
                                        • Nov 2012
                                        • 119
                                        • Canada

                                        #20
                                        Re: Panasonic TC-P42X2

                                        Tested It shows all of RJP30E4 are dead short between S and D.

                                        The 2 RF1501 show low resistance but not shorted.

                                        So Q001, Q002, Q021, Q022 are all shorted

                                        Comment

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