Help with TD1232 PBX (telephone switchboard) power supply

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  • gervabit
    New Member
    • Aug 2025
    • 2
    • argentina
    #1

    Help with TD1232 PBX (telephone switchboard) power supply

    Good morning — I need help finding the value of a resistor (R408) on a power-supply board.


    I haven’t been able to find the service manual for this particular board. The resistor is connected in series between pins 12/11 and 10/9 of an STK73908 IC (in its typical circuit, there is no resistor).

    Click image for larger version Name: R408.jpg Views: 67 Size: 106.8 KB ID: 3702810
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 31077
      • Albion
      #2
      0.33ohms
      page4
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