Distortion on one channel.
I thought of buying another on eBay. Problem is, I've had poor luck in the past buying stuff on eBay. By the time you figure out that it's not working correctly, it can be too late to return the item. I'd rather deal with a unit that I know is screwed up than one that might be...
BSS gave my the schematics for the FCS-920 and the FCS-926. I'll be taking it to a local electronics repair genius for fixin'.