I have an old Yamaha CS-10 given to me by my uncle. He hadn't been playing it much, so made for a pretty sweet gift. But the problem is that the volume comes in and out on the synthesizer. I will let it warm up, sweep the filter and resonance a bit, and then the sound will come popping through. It will sometimes work unfailingly. Other times I cannot get it to remain sounding for more than a few minutes at a time. The most sure fire way I have found to get the sound back is to play the lowest note of lowest octave with a low pass filter all the way left, resonance all the way right, then sweeping the filter up a few times.
Is it possible that the pots are just extremely dusty and losing connection? Or maybe something with the power supply?
Also, for more info, it will be making sound when "cut out." You can hear very faintly the notes being played, but mainly just an electrical buzz-pop when striking the key.
Anyone have any ideas? Can I just take it to someone for repairs, and how much is that usually priced?
Thanks very much!