double check pf jones plugs. isolate the problem by removing pf jones plugs and check for fuse blowing.

Have a look at the Jones plugs, make sure no pins are bent or bare wires crossing over other pins or wires.

Dear fotoboy
I bought an Cabaret too - also for "to restore" ... Your 15 Amp-24VAC fuse blows. Question: How long was that "Coil in Player-1-Score-Reels" buzzing and "not moving" ? Such coils can stand 30 seconds of "constant 24VAC power" - maybe up to 1 minute (maybe up to 2 minutes). Has the coil gotten VERY hot -> insulation of the thin wire melted / burnt -> THERE is Your electrical short ?
Do You want to unsolder the wire on one side of the coil - and then try again to "start up" ?

Has a piece of wire or a screwdriver or such been fallen into the cabinet making a short ?

I also have a Shangri-La: http://www.ipdb.org/machine.cgi?id=2110 I have an idea "to track down" for the "relay having a short". In ipdb-shangri-La-Manual: On the first page we see the transformer and the fuse and after that, the wire runs to the "Right" - all the way through the machine / schema. All relays have one side of its / theirs / the coils connected to that wire. It is the connection to "transformer-phase-POWER".
On page-4 I see a Normally-Closed-Switch on Game-Over-Relay. And then a Normally-Closed-Switch on the RESET-RELAY. If I would put an insulating piece of paper into this switch - the switch on the reset-relay is OPEN (all the time): THEN I turn on the machine -> IF THE FUSE BLOWS: The relay (with the short) is on the LEFT side of that switch. IF THE FUSE DOES NOT BLOW: The relay (I am looking for, the one with the short) is on the RIGHT side of that switch.

On Page-5 of the schema I see an Normally-Closed switch on the Tilt-Relay: Same procedure ...
Want to try ?

I am interested in a copy of your schema - can You post it ? I bet, ipdb.org would also like to get a copy -> "to donate" is simple: Here (Cabaret): http://www.ipdb.org/machine.cgi?id=415 -> to the Right -> click on the button "Submit Changes" and donate - someplace you should write down your real-EMail-address (just, if they have a question - they won't). It will take weeks until they show that / Your schema. ALL "cabaret-Owners" will like You. Greetings from Switzer-Winter-Land Rolf