Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

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  • sfernandes
    Badcaps Veteran
    • Oct 2013
    • 229
    • Canada

    #81
    Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

    Originally posted by tom66
    You tested it correctly, and it is blown.

    Although your new board probably wasn't damaged by the LED driver failing (if it has), your old board might have been. Can you get a picture of the LED driver? There is no schematic for it, so we'll have to work off pictures alone.
    Ok here is pictures of the LED driver. Also that same part is also blown on the payless PSU.
    Attached Files
    Last edited by sfernandes; 10-19-2013, 03:27 PM.

    Comment

    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK

      #82
      Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

      C1, the yellow capacitor 470uF/35V. Test on continuity range. What do you see? It should briefly show a low number and beep, but go to OL after a few seconds.
      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

      • sfernandes
        Badcaps Veteran
        • Oct 2013
        • 229
        • Canada

        #83
        Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

        Originally posted by tom66
        C1, the yellow capacitor 470uF/35V. Continuity range. What do you see? It should briefly show a low number and beep, but go to OL after a few seconds.
        Test it in circuit?

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #84
          Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

          Yes.
          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

          • sfernandes
            Badcaps Veteran
            • Oct 2013
            • 229
            • Canada

            #85
            Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

            Originally posted by sfernandes
            Test it in circuit?
            It starts at 200 Ohms with a short beep then goes up to 512 Ohms and just stays at 512 ohms

            Comment

            • sfernandes
              Badcaps Veteran
              • Oct 2013
              • 229
              • Canada

              #86
              Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

              The payless LED driver board acts as you say it should. But my original LED driver noes not

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #87
                Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

                Not shorted, then. You can try jumpering the fuse on the P board. This should be OK for a quick test as the LED driver is fused. If the fuse on the LED driver blows, or the P board shuts down (power cycling, etc.), you know that the LED driver has an issue. Otherwise the backlight should come on and the TV should work.
                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

                  #88
                  Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

                  Saw your other post... perhaps try jumpering fuse on old P board with new LED driver?
                  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

                  • sfernandes
                    Badcaps Veteran
                    • Oct 2013
                    • 229
                    • Canada

                    #89
                    Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

                    Originally posted by tom66
                    Saw your other post... perhaps try jumpering fuse on old P board with new LED driver?
                    Ok which fuse?

                    Comment

                    • sfernandes
                      Badcaps Veteran
                      • Oct 2013
                      • 229
                      • Canada

                      #90
                      Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

                      I'm confused I don't know why both LED driver boards on the yellow cap gives me different results.

                      Can it be because one is charged and the other one is not?

                      Comment

                      • tom66
                        EVs Rule
                        • Apr 2011
                        • 32560
                        • UK

                        #91
                        Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

                        It may be faulty. It could have caused the fuse on the original power board to fail (fuse blown.)
                        Last edited by tom66; 10-19-2013, 03:46 PM.
                        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

                          #92
                          Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

                          Fuse is PA7401.
                          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

                          • sfernandes
                            Badcaps Veteran
                            • Oct 2013
                            • 229
                            • Canada

                            #93
                            Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

                            Originally posted by tom66
                            Saw your other post... perhaps try jumpering fuse on old P board with new LED driver?
                            Did this and the set works. So what does that mean?

                            Comment

                            • tom66
                              EVs Rule
                              • Apr 2011
                              • 32560
                              • UK

                              #94
                              Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

                              Great! Now replace the original fuse on the P board for long term reliability and safety. This should work:
                              http://www.digikey.com/product-detai...2-1-ND/1473444

                              Return your new P board as defective and keep the old failed LED driver as a spare for extracting parts maybe.
                              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

                              • sfernandes
                                Badcaps Veteran
                                • Oct 2013
                                • 229
                                • Canada

                                #95
                                Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

                                Originally posted by tom66
                                Great! Now replace the original fuse on the P board for long term reliability and safety. This should work:
                                http://www.digikey.com/product-detai...2-1-ND/1473444
                                Can I pull that fuse from another board? Also what does this all mean? what was faulty from the start? was it the LED driver board? or the PS? or both at the same time?

                                Comment

                                • tom66
                                  EVs Rule
                                  • Apr 2011
                                  • 32560
                                  • UK

                                  #96
                                  Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

                                  Looks like your LED driver failed. The fuse on it is rated 6.3A. It shorted the power supply, causing it to output a large current. The power board fuse failed first, probably just random which one fails.
                                  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

                                  • sfernandes
                                    Badcaps Veteran
                                    • Oct 2013
                                    • 229
                                    • Canada

                                    #97
                                    Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

                                    Originally posted by tom66
                                    Looks like your LED driver failed. The fuse on it is rated 6.3A. It shorted the power supply, causing it to output a large current. The power board fuse failed first, probably just random which one fails.
                                    Ok, so my original LED driver board is faulty?

                                    So you think that the original LED driver failed causing the power supply to fail as well correct?
                                    Last edited by sfernandes; 10-19-2013, 04:03 PM.

                                    Comment

                                    • tom66
                                      EVs Rule
                                      • Apr 2011
                                      • 32560
                                      • UK

                                      #98
                                      Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

                                      Yes, I think that's what happened. Either that or the fuse failed randomly, but that doesn't explain the differing measurements between LED drivers.
                                      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

                                      • sfernandes
                                        Badcaps Veteran
                                        • Oct 2013
                                        • 229
                                        • Canada

                                        #99
                                        Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

                                        Originally posted by tom66
                                        Yes, I think that's what happened. Either that or the fuse failed randomly, but that doesn't explain the differing measurements between LED drivers.
                                        Ok, it would be nice if I can get that fuse from another board so I wont have to wait. When looking for it on another board what do I look for is it the markings that it has on it that have to match?

                                        Comment

                                        • tom66
                                          EVs Rule
                                          • Apr 2011
                                          • 32560
                                          • UK

                                          #100
                                          Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

                                          You can use the TV as is, but you should replace the fuse ASAP. Markings would be similar to the white fuse on the LED driver marked 6.3A.
                                          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

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