(Topic ID: 294898)

Bally Air Aces Only Starts One Player Game from Coin Microswitch

By Knxwledge

6 days ago



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  • 7 posts
  • 3 Pinsiders participating
  • Latest reply 6 days ago by Knxwledge
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#1 6 days ago

My Air Aces is acting peculiar and I suspect someone attempted to make the game freeplay at some point but didnt do it right.

When initially turned on, the Game Over Interlock Relay trips, and the game is put into Game Over.  Pushing the credit button makes the credit relay pull in, but nothing else happens.  Activating either of the two coin microswitches makes the Coin relay pull in momentarily, and it starts a game.  The machine cannot start more than a one player game.  When the coin microswitch is hit during a one player game, the Coin relay pulls in momentarily, and that's it. Everything appears to reset fine.

I did go through and clean/gap all switches, clean/lube the steppers. I also did solder a wire between 2 of the contacts on the credit unit to properly set it to free play.

#2 6 days ago
Quoted from Knxwledge:

When the coin microswitch is hit during a one player game, the Coin relay pulls in momentarily, and that's it

If the Coin relay doesn't activate the Coin Unit stepup solenoid when reset for a one player game,
Starting with this switch on the Reset relay,
Inspect and diagnose this circuit with Alligator clip jumper wires
https://pinside.com/pinball/forum/topic/gottlieb-big-shot-repair#post-6305153
http://www.planetimming.com/Pinball/troubleshooting/EM%20Troubleshooting.pdf
http://www.pinrepair.com/em/index3.htm#features
Example of a pinsider actually doing this https://pinside.com/pinball/forum/topic/red-baron-tech-question#post-5858156

pasted_image (resized).png
#3 6 days ago
Quoted from HowardR:

If the Coin relay doesn't activate the Coin Unit stepup solenoid when reset for a one player game,
Starting with this switch on the Reset relay,
Inspect and diagnose this circuit with Alligator clip jumper wires
https://pinside.com/pinball/forum/topic/gottlieb-big-shot-repair#post-6305153
http://www.planetimming.com/Pinball/troubleshooting/EM%20Troubleshooting.pdf
http://www.pinrepair.com/em/index3.htm#features
Example of a pinsider actually doing this https://pinside.com/pinball/forum/topic/red-baron-tech-question#post-5858156
[quoted image]

The coin relay does activate the Coin Unit stepper coil when I manually pull the coin relay in, but not when I push the microswitch. When the machine is turned off with the Coin Unit not at its home position, then a new game is started, it does not reset properly.
Also here's the starting position of the Coin Unit and what shows on the backbox when the game is initially turned on

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#4 6 days ago

Using a jumper from the Orange-Black wire coming off the Coin relay to the Red-Blue wire at the Coin Unit Step Up Solenoid caused it to properly advance when hitting the coin microswitch. I moved the jumper from the Orange-Black wire to the White-Brown wire on the reser relay, and the microswitch stopped making the Step Up Solenoid fire. This would indicate there is a problem with 3B of the score motor, right? I checked it and it is open, closes when a bump hits the stack. I cleaned it again, checked the wiring on the stack and I see nothing amiss.

Edit: I would like to try jumpering from either of the 2 wires on the score motor but how can I put the clip on without taking off the stack? Or is that how youre supposed to do it?

Edit 2: something else I found is that when I turn the game off and on again after getting it to start a multiplayer game, then manually push in the Coil relay, the Coin Unit does reset. If I hit the coin microswitch, the Coin Unit does not reset.

#5 6 days ago

So what would be the difference between manually pushing in the Coin relay versus hitting the coin microswitch? It has to be something with the wiring of the switch, or something physical that changes with my finger down there doing the action. Why is it even caused by me pushing the coin microswitch, and not the credit button? Thats also strange

#6 6 days ago

the difference is the coin relay hold circuit is probably not working. It's also the reason the credit button doesn't cycle the game.

check score motor switches 10A and 8F (or 6F or whatever it is between wire 31-2 and 25-5 at schem D7). The ipdb.org schem quality isn't great.

#7 6 days ago
Quoted from baldtwit:

the difference is the coin relay hold circuit is probably not working. It's also the reason the credit button doesn't cycle the game.
check score motor switches 10A and 8F (or 6F or whatever it is between wire 31-2 and 25-5 at schem D7). The ipdb.org schem quality isn't great.

Well you'd be correct, I cleaned and adjusted 8F again and that fixed it. Credit button works as intended too. Still got other problems, but that was a big hurdle now passed. Thank you!

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