Consider adding it to the list:

https://www.ipsnd.net/view.aspx?id=1493

/Mark

Gottlieb used a plastic wheel with numbers printed around the edge I believe. Bally used a metal wheel with numbers stamped through the metal. I have a short video of a Gottlieb projection unit at:

https://www.funwithpinball.com/exhibits/small-boards#ProjectionUnit.

and photos of a Bally projection unit and knock off switch near the end of the page at:

https://www.funwithpinball.com/resources/1939-Bally-Champion

/Mark

There are wire colors on the schematic:
Lucky Star Hold relay (resized).jpg
The Set Up switch and the Hold relay Make/Break switch are probably the only two switches in the game that connect a black wire to a black wire with a white tracer. The Set Up switch might be the switch that closes as the slide bar returns to the front of the cabinet after the coin slide has been pushed all the way in.

There are two 10 amp fuses; one for the lights (6 volts) and one for the relays and solenoids (25 volts). Which one is blowing? Use the wire colors from the schematic to tell them apart.

On the left in your photo there is a single normally open switch that connects a black wire to a black-white wire. That is likely the Set Up switch since it's normally open and the wire colors match.

On the right in your photo are four other switches, one normally open and three normally closed. If you look through the schematic you'll find four switches labeled On Slide. I bet if you compare wire colors and normally open vs. normally closed you'll be able to identify those four switches. One of them probably provides power to the lamp circuit and the other probably provides current to the solenoid circuit.

So there are a couple of things to sort out:

- Why doesn't the Set Up switch fire the Hold relay? It might be that the Tilt switch in the schematic above is closed or not working.

- Why does the 25 volt circuit fuse blow? You might try unplugging the head to see if the problem persists.