I just bought a beautiful Fisher mono console that has the R-3 chassis in what appears to be the Wilton cabinet. The amp works, but only for whatever is plugged into the "TV In" jack. My question is about the jumper that is supposed to connect the "Expander In" and "Expander Out" jacks... it is not in place. What is the effect of no jumper connection on the operation of the unit? Any light you can shed would be very helpful. The turntable (a Voice of Music with, I believe, a ceramic cartridge, and so not original to the console) works fine when attached to the TV input. Radio was supposedly working but not now. Thanks so much for any reply.