I have an Onkyo TX-SR503 tuner/amplifier, the unit is relatively new (purchased within the last year) and I just discovered that when I try to adjust the treble and bass nothing happens. In other words no adjustments are made to the sound.?? Any help would be appreciated, frenchy
In looking through the service manual for this model, I see a Tone Switch that allows you to bypass the tone circuits, and it may be the one all the way to the left of your front panel. If that's not it, I would get out the owners manual and see what they suggest. I doubt that you actually have an electronic malfunction with your unit.
Posted on Jan 18, 2007
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