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Advantech PCM-5824 audio supply voltage?

Discussion in 'Embedded' started by Jonathan, Sep 9, 2004.

  1. Jonathan

    Jonathan Guest

    I have an Advantech PCM-5824 rev. A1, BIOS 1.13, 300Mhz NS Geode CPU.

    The manual for the 5824 indicates that it has, as other 58xx boards do, a
    jumper to allow you to use +12v for audio instead of the default +5v. This
    is supposed to allow better sound quality (or at least higher volume, I
    However, my 5824 does not have this jumper (J1) at all. I checked and there
    isn't a BIOS option to select the audio supply voltage either.

    I was wondering:
    1) Did my rev. of board leave off the jumper, or
    2) Does it automatically select 12v for the on-board audio if it's

    Does anyone with experience with these boards know the answers?

    Jonathan, Sep 9, 2004
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  2. The manual for the 5824 indicates that it has, as other 58xx boards do, a
    In a couple of boards we received while sampling alternatives (during
    a 5820 shortage), they changed from using a NatSemi "Boomer" audio
    power amp to a low-output opamp (I forget the part#). These boards
    didn't have the rail select jumper, and they weren't capable of
    driving speakers credibly; they required an external power amp.
    Lewin A.R.W. Edwards, Sep 9, 2004
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  3. Jonathan

    Jonathan Guest

    Thanks for clearing that up, just wanted to be sure I wasn't losing my mind.
    Jonathan, Sep 9, 2004
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