hifi engine

Sherwood S7200 stereo multiplexer

Hey folks, on my Sherwood S7200, the stereo multiplexer will not separate left and right channels on FM. I have read about this problem, (possible bad TR-302 transistor) but would like to know how to properly adjust the pots on the multiplex board and re-align the FM receiver. Somebody's been inside this thing playing around. I see the schematic got posted, but any chance somebody out here has a service manual for this receiver? Thanks to all! and best Regards.