"andrew queisser" andrew.queisser at hp com wrote in message
...
My trusty Pioneer A-9 has a problem on the right channel. If I listen on
the headphones the sound is great, on speaker the sound is fuzzy but only
on the right channel. The headphone ouput actually comes from the speaker
output, not the preamp, so it seems that fundamentally the signal is
getting through but under load it gets fuzzy. I can hear the distortion in
the headphones when I click the speakers on but when I click the speakers
off the sound is fine.

The power supplies feed both channels in parallel so I doubt it's a power
supply problem.

I have a scope and a little audio probe gizmo that lets me listen to audio
signals with an earphone. I can generate signals from my PC and feed them
into the amp, if that helps. I also have the schematics so I can trace the
signal but I'm not quite sure how to go about it.

Any tips?

Thanks,
Andrew Queisser





I've seen mainly controls and switches need cleaning on these, including the
speaker switches, and speaker relay.

Mark Z.