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QSC ISA500 quiescent current

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  • QSC ISA500 quiescent current

    I'm looking for information about setting quiescent current and current limiters in QSC ISA500TI amp. The schematic does not contain this information. Has anyone got service manual for this amp?

    Mark
    Last edited by MarkusBass; 07-18-2011, 07:36 AM.

  • #2
    Here is a service bulletin that I found on the QSC site.
    Down at the bottom the bias/ current specifications are indicated.
    (Wheee!! "drive it into a short")
    Attached Files

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    • #3
      Thank you very much. This solved the problem. I skipped the second part since I don't have 2 Ohms/1200W resistor :-). The amp works great.

      Mark

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      • #4
        The factory does not even recommend resetting the current limit unless:
        someone twiddled the pots.
        There was a catastrophic failure requiring wholesale replacement of the output section.

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