Sony KDL-50W800C dead set

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  • videotronics
    Member
    • May 2013
    • 22
    • USA
    #1

    Sony KDL-50W800C dead set

    Voltage readings on power supply board connector
    cn4001
    pin reading (volts)
    2 .06
    4 19.3
    6 19.3
    8 19.3
    10 .06
    12 19.3
    14 3.43
    16 .09
    18 .091
    20 .09
    22 .09
    24 3.42
    26 3.43
    28 .225
    30 .06
    1 .054
    3 19.36
    5 19.36
    7 .061
    9 12.62
    11 12.62
    13 .063
    15 3.39
    17 .055
    19 .058
    21 .057
    23 19.35
    25 .067
    27 .06
    29 .058
    Information to test power supply and mainboard appreciated
    Tags: None
    • Davi.p
      Hobbist Tech
      • Sep 2009
      • 4367
      • Italy - Milan
      #2
      Re: Sony KDL-50W800C dead set

      what do you means for dead? No signs of life? Check tension on all coils of the main board, except the 4 in a row of the audio amp.

        Comment

        • videotronics
          Member
          • May 2013
          • 22
          • USA
          #3
          Re: Sony KDL-50W800C dead set

          Thank you for the recommendation. My measurements:
          coil voltage readings (left to right)
          mark on coil Voltage (volts)
          3R3 1.8
          1R5 3.387
          1R0 1.032
          2R2 5.09
          2R2 1.502
          These are good power supply readings?

            Comment

            • Davi.p
              Hobbist Tech
              • Sep 2009
              • 4367
              • Italy - Milan
              #4
              Re: Sony KDL-50W800C dead set

              Voltage on coils are perfect. Suspected software issue on standby memory or microcontroller.. (i don't know this model). But my initial question?

                Comment

                • videotronics
                  Member
                  • May 2013
                  • 22
                  • USA
                  #5
                  Re: Sony KDL-50W800C dead set

                  The television has no light, no LED illuminated, no sound (dead set).
                  Anything further I can do to test the mainboard?

                    Comment

                    • Davi.p
                      Hobbist Tech
                      • Sep 2009
                      • 4367
                      • Italy - Milan
                      #6
                      Re: Sony KDL-50W800C dead set

                      locating standby memory/microcontroller , freezing it, wait 5sec then turn on tv or read it with programmer an reprogram back

                        Comment

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