Danville, CA
I have two basic questions regarding the schematic for the Gottlieb Jumping Jack machine. What “state” does the schematic correspond to, and What is the role of the “self-kill” switches that seem to kill their relays as soon as they activate.
1 - A common theory is that the schematic corresponds to when the first ball of the game has been kicked into the chute, as opposed to when all relays are deactivated. In the schematic detail shown, the R (Hold) relay has one NC switch and one make/break switch. The Hold relay (not shown) activates with the Start button and self-latches until a power break, so the R relay would presumably be activated when the ball is in the chute. But if the NC R switch was closed during play, the N & M switches would be moot. Similarly, if the R make/break switch was in the state depicted during play, the M switch would be kept from advancing the AX match number every time 100 pts are scored. These cases seem to refute the claim that the state is with ball 1 in the chute and support the schematic portraying the power off condition. Is this interpretation correct?
2 - The ZB (First Ball) NC switch (red), along with either the previously mentioned NC R switch or the NC H make/break switch seem to provide a return path to activate ZB as soon as power is turned on. However, the ZB switch would then open and immediately deactivate the ZB relay, making it a momentary contact relay. (Also note that if the R switch was depicting the “ball 1 in the chute”, activated state, the ZB relay would then oscillate, turning back on as soon as it killed itself.) Is this right?
online Q part.pdf
