This unit came to me with a volume problem. When powered on, it goes though it's checks and the speaker relay clicks on. I connected a CD player and speakers to it. volume was about 30 percent, no matter how high you turned up the volume knob.
I found a defective TC9212P
ELECTRONIC VOLUME CONTROL IC. after replacing it, I was able to turn the volume all the way down and all the way up with no problem. I hope this repair can help someone in the future.