Tnpa5081 af 7 blink error trying to repair

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  • ricosavy
    Badcaps Veteran
    • Jul 2012
    • 457
    • united states

    #1

    Tnpa5081 af 7 blink error trying to repair

    I am getting 7 blink error on panasonic tv.The sc board seem to be problem i ordered repair kit from shopjimmy and did not fix my problem.I also jumpered sc test connector and turned tv see if board would give me a error gave me 7 blinks.I assume if board was good it should have not blinked.any help would be appreciated.
  • Caleb
    Smokin IC's
    • Feb 2013
    • 645
    • USA

    #2
    Re: Tnpa5081 af 7 blink error trying to repair

    Take a look at this thread Tw2005 is the master of the 5081
    Liberating magic smoke one part at a time

    Comment

    • tw2005
      Badcaps Legend
      • Oct 2011
      • 6458
      • Australia

      #3
      Re: Tnpa5081 af 7 blink error trying to repair

      Originally posted by ricosavy
      I am getting 7 blink error on panasonic tv.The sc board seem to be problem i ordered repair kit from shopjimmy and did not fix my problem.I also jumpered sc test connector and turned tv see if board would give me a error gave me 7 blinks.I assume if board was good it should have not blinked.any help would be appreciated.
      That's because the dickheads have not included some key components which commonly fail more than some of the other bits they have put in.

      I expect SJ will be getting regular complaints as they sell these kits. Of course the common out will be that the kit fixes most but if you go to my 5081 thread, just had a conversation with someone about no 30F125 IGBTs and the schmitt inverter which I can almost guarantee will be dead with all 5081 shorted SC2 failures.

      Hopefully nothing has popped with your powerup attempt. Hopefully you can sort it or I cross paths online to help (fingers crossed)
      Last edited by tw2005; 05-15-2014, 04:12 PM.

      Comment

      • ricosavy
        Badcaps Veteran
        • Jul 2012
        • 457
        • united states

        #4
        Re: Tnpa5081 af 7 blink error trying to repair

        After reading your other post tw2005 30f125 igbts has i short and it took out Q661 and probably took out some other components.I will try to hook up my leakfinder see if i can figure out where my other shorts are at.still trying to figure out how to use it got it a few weeks ago.

        Comment

        • tw2005
          Badcaps Legend
          • Oct 2011
          • 6458
          • Australia

          #5
          Re: Tnpa5081 af 7 blink error trying to repair

          Originally posted by ricosavy
          After reading your other post tw2005 30f125 igbts has i short and it took out Q661 and probably took out some other components.I will try to hook up my leakfinder see if i can figure out where my other shorts are at.still trying to figure out how to use it got it a few weeks ago.
          Q661 will most likely be due to the schmitt inverter IC, marked HA, 5 pin located near Q818 which could also be dead as well .

          Comment

          • bregva
            Member
            • May 2013
            • 11
            • USA

            #6
            Re: Tnpa5081 af 7 blink error trying to repair

            Originally posted by tw2005
            Q661 will most likely be due to the schmitt inverter IC, marked HA, 5 pin located near Q818 which could also be dead as well .
            Scmitt inverter and Q818 could definitely be a culprit as I found out after numerous failures with the board. From now on, on every board I will replace them, even if, especially Q818 looks innocent in cct. D702 was included in the kit, also read ok, but since it is connected directly to always shorted HA inverter, would be safe to replace it too
            But, man, I'm still on cloud nine after fixing the board yesterday

            Comment

            • tw2005
              Badcaps Legend
              • Oct 2011
              • 6458
              • Australia

              #7
              Re: Tnpa5081 af 7 blink error trying to repair

              Originally posted by bregva
              Scmitt inverter and Q818 could definitely be a culprit as I found out after numerous failures with the board. From now on, on every board I will replace them, even if, especially Q818 looks innocent in cct. D702 was included in the kit, also read ok, but since it is connected directly to always shorted HA inverter, would be safe to replace it too
              But, man, I'm still on cloud nine after fixing the board yesterday
              The inverter cct 100% is responsible for switching Q661 which drives that small transformer on the board. effectively if the IGBT is not pulsed, T471 presents it self as a dead short which it is and Q661 I suspect is switched on, not cycled on/off and bang.

              I've already highlighted all the bits involved including the 5V reg in the other post. just a matter of being patient and thorough. I'd recheck all previous replaced parts too.

              Comment

              • tw2005
                Badcaps Legend
                • Oct 2011
                • 6458
                • Australia

                #8
                Re: Tnpa5081 af 7 blink error trying to repair

                schmitt inverter is a TC7SH14F (toshiba) , SN74AHC1G14DBVR is direct replacement

                size is SOT23-5

                Comment

                • ricosavy
                  Badcaps Veteran
                  • Jul 2012
                  • 457
                  • united states

                  #9
                  Re: Tnpa5081 af 7 blink error trying to repair

                  I will replace those items and check see if anything else is shorted.As far as Shop jimmy kit i think they truthly believe there kit will fix the problem but like tw2005 pointed out they probably did not test the kit to make sure it would fix the problem.Or did not test enough boards to make sure it would work properly.I can not speak for every one but i contacted them and told them there kit did not work.There response was are u sure it is the sc board and not main board or sm board or panel they could also cause 7 blinks.I told them i was sure the sc was they problem.They immedaitely refunded my money.I hope they take your advise tw2005 and include the parts that are missing and do more testing.Because this could make a good kit if they would get it right and it is reasonably priced.

                  Comment

                  • ricosavy
                    Badcaps Veteran
                    • Jul 2012
                    • 457
                    • united states

                    #10
                    Re: Tnpa5081 af 7 blink error trying to repair

                    Tw2005 do have a picture where schmitt inverter is at.I can see where q818 is at not sure about schmitt inverter is at.

                    Comment

                    • ricosavy
                      Badcaps Veteran
                      • Jul 2012
                      • 457
                      • united states

                      #11
                      Re: Tnpa5081 af 7 blink error trying to repair

                      Is it ic773 the schmitt inverter

                      Comment

                      • ricosavy
                        Badcaps Veteran
                        • Jul 2012
                        • 457
                        • united states

                        #12
                        Re: Tnpa5081 af 7 blink error trying to repair

                        Looking back at kit i bought q818 and d702 where included in kit but ic773 was not.

                        Comment

                        • tw2005
                          Badcaps Legend
                          • Oct 2011
                          • 6458
                          • Australia

                          #13
                          Re: Tnpa5081 af 7 blink error trying to repair

                          Originally posted by ricosavy
                          Is it ic773 the schmitt inverter
                          yes, will be marked HA if it's the original Toshiba, nice one getting a refund. recheck Q701,702, IC771
                          Last edited by tw2005; 05-16-2014, 09:34 PM.

                          Comment

                          • ricosavy
                            Badcaps Veteran
                            • Jul 2012
                            • 457
                            • united states

                            #14
                            Re: Tnpa5081 af 7 blink error trying to repair

                            Will do thanks

                            Comment

                            • tw2005
                              Badcaps Legend
                              • Oct 2011
                              • 6458
                              • Australia

                              #15
                              Re: Tnpa5081 af 7 blink error trying to repair

                              make sure you resistance check the buffer boards too.

                              Comment

                              • ricosavy
                                Badcaps Veteran
                                • Jul 2012
                                • 457
                                • united states

                                #16
                                Re: Tnpa5081 af 7 blink error trying to repair

                                I checked ic 771 and it is shorted out not sure about q701 and q702 them i checked them out there is no low resistance also i checked ic773 and pin 5 and 1 are showing .2 ohms i would assume this means ic is shorted.

                                Comment

                                • tw2005
                                  Badcaps Legend
                                  • Oct 2011
                                  • 6458
                                  • Australia

                                  #17
                                  Re: Tnpa5081 af 7 blink error trying to repair

                                  Originally posted by ricosavy
                                  I checked ic 771 and it is shorted out not sure about q701 and q702 them i checked them out there is no low resistance also i checked ic773 and pin 5 and 1 are showing .2 ohms i would assume this means ic is shorted.
                                  Yeah, I guess you never had a chance to read my thread through before you fitted the kit.

                                  That being shorted is one reason why the kit failed, not included so that was short even before you worked on it, that is why Q661 is dead again.

                                  Short should clear with IC773 removed, IC771 supplies it.

                                  IC771 is that in the kit?

                                  Comment

                                  • tw2005
                                    Badcaps Legend
                                    • Oct 2011
                                    • 6458
                                    • Australia

                                    #18
                                    Re: Tnpa5081 af 7 blink error trying to repair

                                    Q701,702 generally go short, so no short, should be ok

                                    Q818 is real hard to judge in cct.

                                    Comment

                                    • ricosavy
                                      Badcaps Veteran
                                      • Jul 2012
                                      • 457
                                      • united states

                                      #19
                                      Re: Tnpa5081 af 7 blink error trying to repair

                                      Yes it was included in thebkit ic771

                                      Comment

                                      • tw2005
                                        Badcaps Legend
                                        • Oct 2011
                                        • 6458
                                        • Australia

                                        #20
                                        Re: Tnpa5081 af 7 blink error trying to repair

                                        Originally posted by ricosavy
                                        Yes it was included in thebkit ic771
                                        so I guess your just waiting to source the inverter ic and 30F125 + the RJP63F3A.

                                        Have you got any 2009/10 Samsung boards worth scrapping?

                                        I know the 42C450 series have RJP63F3 transistors on the Ymain, could be some Toshiba too .

                                        Comment

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