Panasonic plasma TX-P42ST50 - 6 blinks

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  • jm1234
    Senior Member
    • Jan 2024
    • 61
    • Slovakia
    #1

    Panasonic plasma TX-P42ST50 - 6 blinks

    Hi,
    anyone able to provide the service manual for old plasma Panasonic TX-P42ST50E?
    It turns off almost immediately (0~5 seconds after pressing the on/off button) and starts flashing the red diode 6 times.
    I disconnected the left-hand side board (SC?, both the ribbon cable and the power cable to it) and also another ribbon going to bottom left board. Then the led signal is 8 flashes. According to service guide to another Panasonic plasma it would mean the left-hand side board is faulty. But I'm not sure it 100% applies to my model.
    I checked that board for any obvious faults like mosfets, diods etc. All the electrolythic caps seems to be 90% of their original capacitance, while ESR looked fine (<1ohm) I think.
    Any suggestions?
    Tags: None
    • Answer selected by jm1234 at 05-24-2024, 12:40 AM.
      vinceroger69
      Badcaps Legend
      • Mar 2012
      • 6714
      • uk
      not sure if this service manual will be close enough https://elektrotanya.com/panasonic_t.../download.html
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        • vinceroger69
          Badcaps Legend
          • Mar 2012
          • 6714
          • uk
          #2
          not sure if this service manual will be close enough https://elektrotanya.com/panasonic_t.../download.html
            • Selected Answer

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            • jm1234
              Senior Member
              • Jan 2024
              • 61
              • Slovakia
              #3
              I found a disfunctional optocoupler on the SN board, replaced it and the issue is still the same - 6 flashes. :-(

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