[jerryhawthorne]

Brenda, looks like that coil did a little smoking. If that solenoid arrangement is for the power switch it would have been simple to just "set" sliding armature to the on and unplug the radio for off. No idea if all four coils are identical but would think so as both solenoids work in the same fashion. Energize one coil and it pulls the armature towards it, rotating the switching wafer to that position where it stays without power. Energize the other coil and it pulls the armature in the opposite directing, rotating the switch back. Really neat mechanism that takes the lateral move of the armature and results in a rotary turn of the switch wafer. Not looking at the schematic but it would seem to me that each coil would have only two terminals for energizing from the low voltage transformer. Can't image why the coil would have 4 connections.
The underside of those chassis do seem to stay very clean but the chrome, particularly on the cans for the AM and FM IFs are very prone to flaking. The chassis, not flaking but rust pits.
As indicated in a previous post you may wish to contact Norman who has helped me with parts. If the "plastic" cap you were referring to was one of the e-caps on the power supply and you have the top cap in good shape, I have a good barrel that I removed to top cap from to put on my chassis that had blown the top cap off some time in the past.
Good luck and build up those muscles, when you get to the power supply, that is even heavier.
Jerry