I have a Sony CRF-5090 Earth Orbiter. The thing sounds fantastic, and on the
bands that work (FM/AIR/SW3,4,5) it's very VERY sensitive and has better
than average selectivity. The problem is, it doesn't work on LW/MW/SW1. I've
tracked it down to the oscillator being dead on those bands. What I can't
seem to track down is why. I've got the service manual, and the schematic is
no problem to read, but the actual switches not so much. At least one of
them seems not to connect to anything at all. Has anyone ever had this sort
of problem with this radio and can help me figure out what's going on?

TIA