BN44-00274a dead

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  • dskall
    Badcaps Legend
    • Oct 2016
    • 2905
    • usa

    #21
    Re: BN44-00274a dead

    Ok, the NTC had me confused. It is same as a resistor. Still shouldn't pin 4 have 18+ volts on it to start and power the circuit? O/P said there was .35v
    I assume no responsibility for any stupid suggestions I might post.

    Comment

    • ajshoe
      ajshoe
      • Dec 2012
      • 477
      • usa

      #22
      Re: BN44-00274a dead

      This PSB has me dreaming - I love challenges. I'm leaving for west coast for 2 week vacation. (probably dream about this board on vacation). be back in 2 weeks. thanks for the insight so far. I'm confident this samsung tv will live again. been following all advice and not looking at schematic. will spend some time on schematic. HEY - thats what makes this FUN ! I love plasma tvs. many THANKS. dskall - headed to Portland. OR

      Comment

      • ajshoe
        ajshoe
        • Dec 2012
        • 477
        • usa

        #23
        Re: BN44-00274a dead

        want to thank everyone for there input here. listening to everyone here has not allowed me to look at schematic to get insight on this problem. I'm on vacation tomorrow to west coast. dskall - Portland, OR. thanks again and I'll be back on this soon (probably be dreaming for the next 2 weeks about this board ! ).

        Comment

        • dskall
          Badcaps Legend
          • Oct 2016
          • 2905
          • usa

          #24
          Re: BN44-00274a dead

          Have fun. Don't get caught in the riots.
          I assume no responsibility for any stupid suggestions I might post.

          Comment

          • ajshoe
            ajshoe
            • Dec 2012
            • 477
            • usa

            #25
            Re: BN44-00274a dead

            You should no that's way overblown. just like all the news nowadays

            Comment

            • ajshoe
              ajshoe
              • Dec 2012
              • 477
              • usa

              #26
              Re: BN44-00274a dead

              removed HS802 (ICB801S) pin 4 - 5 are shorted. ordered part and a the 220UF 50V cap is weak also. it'll be 2 weeks before I report back. thanks

              Comment

              • dskall
                Badcaps Legend
                • Oct 2016
                • 2905
                • usa

                #27
                Re: BN44-00274a dead

                Should fix the problem.
                I assume no responsibility for any stupid suggestions I might post.

                Comment

                • ajshoe
                  ajshoe
                  • Dec 2012
                  • 477
                  • usa

                  #28
                  Re: BN44-00274a dead

                  got back. replaced ICB801S and high ESR cap. have +5 V on STBY now! will put board in plasma tomorrow. need sleep

                  Comment

                  • ajshoe
                    ajshoe
                    • Dec 2012
                    • 477
                    • usa

                    #29
                    Re: BN44-00274a dead

                    quick follow up - put PSB in tv and set powers up perfectly. Believe all the bad solder joints (lot of them on PSB) killed the standby circuit. Thanks to all for the input and help.

                    Comment

                    • dskall
                      Badcaps Legend
                      • Oct 2016
                      • 2905
                      • usa

                      #30
                      Re: BN44-00274a dead

                      Thanks for feedback.
                      I assume no responsibility for any stupid suggestions I might post.

                      Comment

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