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    50PK550 EAX61392501 Shutting Off

    I've read the threads and replaced the ceramic resistors, IC301, and almost all the caps. I read that I should replace R103-R113. My eyes are not that good but it looks like some of the resistances are off. Is there any other parts to look at? And does someone know all the resistances for those resistors? Elektrotanya doesn't have a schematic for the 50PK550. Unless I use the schematic for the 50PK750?

    #2
    Re: 50PK550 EAX61392501 Shutting Off

    I used a magnifying glass. Here's my resistor sizes I think. I hope someone can confirm:

    R103: 2403
    R104: 2403
    R105: 1503
    R106: 1503
    R107: 1003
    R108: 6803
    R109: 6803
    R110: 6803
    R111: 6803
    R112: 6203
    R113: 5603

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      #3
      Re: 50PK550 EAX61392501 Shutting Off

      I did that a while ago, not sure if it's the exact same board of yours.

      https://www.youtube.com/watch?v=NmifFBrB8BM

      I should still have one of these boards at home, I'll have a look.

      Comment


        #4
        Re: 50PK550 EAX61392501 Shutting Off

        Originally posted by paulstef View Post
        I did that a while ago, not sure if it's the exact same board of yours.

        https://www.youtube.com/watch?v=NmifFBrB8BM

        I should still have one of these boards at home, I'll have a look.
        Your Video?

        Comment


          #5
          Re: 50PK550 EAX61392501 Shutting Off

          Originally posted by tw2005 View Post
          Your Video?
          he does some great stuff. i subbed ages ago and always enjoy his vids.
          Last edited by attainteddragon; 09-18-2017, 04:35 PM.
          WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?

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            #6
            Re: 50PK550 EAX61392501 Shutting Off

            Originally posted by tw2005 View Post
            Your Video?
            Yes. Unfortunately the board I have here is not exactly the same as the OPs I think, it might be similar though. In the 50PK550, is that the EAY60968801 or 701? I have the 701 here, I think the main difference is the number of the big white resistors and there may be one or two connectors on top with VS etc.
            Last edited by paulstef; 09-18-2017, 08:08 PM.

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              #7
              Re: 50PK550 EAX61392501 Shutting Off

              Originally posted by dcapper View Post
              I used a magnifying glass. Here's my resistor sizes I think. I hope someone can confirm:

              R103: 2403
              R104: 2403
              R105: 1503
              R106: 1503
              R107: 1003
              R108: 6803
              R109: 6803
              R110: 6803
              R111: 6803
              R112: 6203
              R113: 5603
              I can confirm that on the EAY60968701 (EAX61397101/8) all these values are the same as on your board. Your eyes are pretty good. :-)

              I like this board because it can be tested completely independently from the rest of the TV by applying a signal to RL_ON and M_ON, don't forget to put a load on VS when starting it up.
              Last edited by paulstef; 09-18-2017, 08:19 PM.

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                #8
                Re: 50PK550 EAX61392501 Shutting Off

                Nice video, How's it going with this one Derek? Just picked up one , Tv worked fine then sudden just clicks on, then off. Looks like bad PSU. Better get cracking at the research i.e Pauls video.

                LOL.

                Comment


                  #9
                  Re: 50PK550 EAX61392501 Shutting Off

                  I can confirm, I'm not having fun. resistors seem ok, no blown fuses, swapped out ic301.

                  Comment


                    #10
                    Re: 50PK550 EAX61392501 Shutting Off

                    watch out for cracked / dry solders. Just found a shed load., all along the heats sinks. Very dry and nasty, thought it was a fix but still dead, maybe something has been damaged. Mine actually ran . Was told needed PSU , then suddenly it just would not turn on, click on then off immediately.

                    Comment


                      #11
                      Re: 50PK550 EAX61392501 Shutting Off

                      Right, get your bet set of goggles and good light. Worst board I've seen for a long time. Not something you see in the Panasonics much but after another 20 or more additional joints resoldered it's running.

                      Pay close attention to all heatsinked parts and all transformers pins etc. Some were so dry the solder completed flowed off the joint on re-heat. Genuine cold joints. probably worth a fule desolder and fresh leaded solder.

                      I was even hitting a lot of smaller stuff and links, some had very little solder and looked ordinary.

                      I have another with the same PSU, meant to be faulty, I bet it's bad PSU solders too, as it has not faulted yet which is what this one presented. trip home must had sk
                      shaken a few joints into contact again.

                      Good luck with yours
                      Last edited by tw2005; 09-24-2017, 06:01 AM.

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                        #12
                        Re: 50PK550 EAX61392501 Shutting Off

                        Comment


                          #13
                          Re: 50PK550 EAX61392501 Shutting Off

                          Any luck at your end? I've got another now, looks like it's close to your symptoms. Solders are good, 10 ohm resistors ok,

                          just clicks, no VS or Va up but 5v is present

                          Comment


                            #14
                            Re: 50PK550 EAX61392501 Shutting Off

                            You blokes still alive?

                            Just fixed this one.

                            So this one. stdby 3.4V ,but at RUN= 5.1 v . 17v was present, no Va or Vs
                            Relays just clicking.

                            Resistors good, check all solders and reflowed. Nothing shorted,

                            Swapped out all main Ic's from good board, - no change

                            Started swapping optos, no change..................until I changed PC101,102. Can't say which one but now it's running.

                            Funny thing I started with an opto swap , just the wrong one based on a mention somewhere in another thread.

                            They're nothing special real common garden variety opto you see a lot. chances are if you have some boards laying around you'll have something

                            Comment


                              #15
                              Re: 50PK550 EAX61392501 Shutting Off

                              Not sure what happened but I remembered I swapped 2 FETS from another which were 3Amps less. put the 15A ones back in brushed up a couple of spots and a clean. Farking thing, back to clicking but only does 3 or cycles then quits.

                              Over it TBH.

                              Tried reversing back to where it was working, nup. Stuff it.
                              Last edited by tw2005; 10-02-2017, 12:05 AM.

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                                #16
                                Re: 50PK550 EAX61392501 Shutting Off

                                thanks

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