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Low output signal on analog synth

Discussion in 'Electronic Repair' started by David Dunnett, Feb 10, 2006.

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  1. Anyone here have any idea how to diagnose and fix an analog keyboard with a
    low signal output that's only coming through in one channel? Is there an
    internal amplifier? Is it just the jack?

  2. Ray L. Volts

    Ray L. Volts Guest

    Does it have a headphone jack, and if so, same symptom with phones?
  3. no headphone jack. but i did listen through headphones and had the same
  4. Ray L. Volts

    Ray L. Volts Guest

    How did you listen via headphones w/o a jack? Didja hook 'em up to the line
    level outs?
    Might help to know the model unit we're talking about. Most analog
    keyboards I'm familiar with don't have built-in speaker drivers, but yours
  5. It's a Roland SH-2000 monosynth. My headphones have a quarter inch adapter
    so I just listened through line out (that's all there is).

    I don't have an amp on hand right now, but the last time I hooked it up I
    needed to turn the volume WAY up to hear anything.
  6. Ray L. Volts

    Ray L. Volts Guest

    As this is a 70's synth, you may have some resistors that have increased way
    out of tolerance. Would be a good idea to check the electrolytic caps as
    well on a unit this old.
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