[Ron Ramirez]

The "off-on-volume" control on the radio is actually a two-position switch, part (56) on the schematic, which makes the motor run in one direction or the other to turn the volume control one way or the other. The thumbwheel control will only "give" a little bit up or down - this mechanically actuates switch (56).

The motor, and the off-on-volume control assembly, are both mounted under the chassis and mechanically coupled together with gears.

In short, if the motor she do not a turn, the volume control she do not a turn either.

Yes, the motor does have a motor run capacitor; it is part (59). Original specs call for 30 uF, 30 volts; do NOT use a regular polarized electrolytic as a replacement!

I've never owned one of these either, but I've serviced a few of the 39-116 variety. Not much fun...and definitely not for the novice. You haven't lived until you've encountered a non-functioning stepper unit (which is under the large rectangular metal cover on top of the chassis). To be honest, I don't want one, first wireless remote or not. Not trying to discourage you, Steve...but I really don't like to work on them.