Hi all:

Researched to use stock radio/cassette head for premium mode. As I upgraded and want to go back to stock. I have figured out most of whats needed. The earlier radio units have a switch on the bottom to go from standard to premium mode. I have the radio apart. I dont see a jumper or anything. Does anyone know how to do this ???. Solder in jumper or is it programming on this unit. Tks in advance !!