Hello! New To Site And Forums. I Was Wondering If Anyone Knew Anything About This Unit. When It Was Given To Me I Was Told That It Was Being Used For The Pre-outs. I'm Almost Certain The Main Ic Is Out But The Pre-outs Were Still Working. Now The Volume Knob Is Not Working And It Will Not Go Into The Auido Menu...

I Have The Service Manual If Anyone Could Help!!!

 

1st step - read the schematic and scope out various points to detect the problem area.