i was playing the left tape deck last night and sound quit but tape still moving. switched to right deck, tape moves ok but no sound. cleaned bot heads no results. the sharpscan peak level display is not displaying anything. all tape movement looks good. i need and schematic so i can scope out where the signal from the head is lost.. must be beyound where the two head signals merge to go out tthe line out jacks. do you have schematic of this model?? Email is (Jimpeghill@bellsouth.net) thank you....