How They Work - Double or Nothing - Double Win Relay #2
Finally we reach the goal of double/nothing - getting the double win #2 relay to power. As soon as it does, the replay cams are released and the payout process occurs.
The early version of this circuit as shown here has a redundant method of powering double win relay #2. Later games simplified this.
Circuit Details
The orange circuit is the one that survived into later games. The switches simply labelled 1-6 are switches on the corresponding double trip relay. In this case, when the search wipers and search index allow current to pass along the blue wire, it branches along the orange and if the double trip relay is tripped, goes down through the diode and powers double win #2 relay.
Because the trip relay stays tripped for the duration of the game, if you play for double after the 4th ball and win, then improve your win on the 5th ball, that additional win is automatically doubled when it's detected.
The cyan circuit contains a single switch labelled '#1 double relay'. What they mean is double win relay #1. In this version of the circuit, the double win #2 relay powers at the same time as the double win #1 relay, and the cyan circuit is good enough to keep the double win relay #2 coil powered for the duration of the payout. Eventually the search index relay will lose power when payout is complete, and that opens the double play, double win #1 and double win #2 relays.
Why the cyan circuit is there I don't see at the moment. If you removed it, it looks like the game would still work correctly. The cyan circuit did get tossed in later games, so maybe it occured to bally also that it wasn't doing anything.
We ran across diodes in the double delay circuit where they were used to rectify AC into DC so the capacitor delay would function. There's no cap in this circuit. What the diodes are doing is blocking and quenching the effects of the magnetic field collapsing in the double win #2 relay when it's power is removed. The diode across the coil gives the current a place to loop around, and the diode up a the trip relay switch blocks any of that current from squirting back along the orange line and cuts down on arcing on the contact plate rivets.
What the Double Win #2 Relay Does
When the double win relay #2 powers, the purple circuit is activated to power the replay cams index coil. That releases the replay cams. As the replay cams rotate, credits are added to the replay register (the credit number wheels the player sees) and a replay counter disc steps up - but they may step up at different rates. When the replay counter steps up enough times, the payout circuit is broken and payout stops.
Note upstream of the replay cams index coil but not on the purple path is the regular win relay switch. A regular win also has to release the replay cams for payout. What's the difference?
The only difference is the green and red circuits. The red circuit is for regular wins, and switches on CU cam 8 are being used to step up the replay counter. If a double win is being paid, the double win relay #2 switch flops over and the CU cam 9 switch in the green circuit is stepping up the replay counter instead.
The trick is the number of lobes on the cams. Cam 8 has double the number of lobes of cam 9, so cam 8 steps up the replay counter twice as fast - resulting in a payout 1/2 what you get when cam 9 is used.
