It seems like AXR Relay's not energizing which is keeping the the AX Relay
in its locked position.
For the AXR to energize, a set of switches need to be making when the
Light Box Advance Unit is in the zero (Reset) position. A couple wiper blades
(snowshoe wipers I believe) in the Ball Count Step Up need to be making contact
to it's wiper board while in the reset position, and also (which I'm thinking is
where the problem most likely is) a set of contacts need to be making in each
Score Reel when their in their reset (on zero) position..
Also 2b score motor contacts need to make, and the R (Hold) Relay needs to
be energized which I'm sure it is..
At 15E, you'll see the AXR circuitry on the schematics..