Question about Onkyo TX-SR503 Receiver

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Treble and bass function

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

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Re: treble and bass function

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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I suspect that the speaker levels need to be set. You connected everything right - many people would not have connected the sats via the bass section (which has their high pass crossover and overload protection). But I am betting the HSU is turned up a bit on the high side.

Try this. Set all speakers to small, set all levels to 0. Play the receiver in stereo all mode. If the bass is strong, you need to turn the HSU down closer to a natural sound. Then use the speaker setup tone and adjust as needed.

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Ooops, that did not work.  OK try  for download of manual in .pdf form, and English too!   Hope this helps.  Cheers,   Chris  :)

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Called Onkyo and here is the solution they gave me.

1. Turn on unit.

2. Press and hold VIDEO 1 button.

3. While pressing VIDEO 1, press Speaker A button.

4. You should see "CLEAR" on the display for a second and it will go on stand-by mode.
5. Turn on the unit and check if sound is back.

Hope this helps

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