Williams Liberty Bell Issues:

Quicksilver

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Having some problems with my EM Liberty Bell. I push the button to fire up a game and it blows the 15amp fuse. I looked for shorts and I don't see anything. I thought for some reason, it may be the coin door since it doesn't add credits, so I swapped coin doors and still nothing. Ideas?
 
Having some problems with my EM Liberty Bell. I push the button to fire up a game and it blows the 15amp fuse. I looked for shorts and I don't see anything. I thought for some reason, it may be the coin door since it doesn't add credits, so I swapped coin doors and still nothing. Ideas?



Are any of the coils relays burned up/melted down. You can always isolate the playfield and backbox from the rest of the game to see if the fuse pops. Are the connecters in the right spots. I know they are different sizes, but if there is a will there is a way....
 
Are any of the coils relays burned up/melted down. You can always isolate the playfield and backbox from the rest of the game to see if the fuse pops. Are the connecters in the right spots. I know they are different sizes, but if there is a will there is a way....

I don't see any burnt or melted coils. All the connectors are in the right places. If I push the button to start a game once, it wont blow the fuse, but if I push it again, it pops.
 
Then I would look to the 2nd player circuit. I suspect there is a connection that is touching or something fell (nut, piece of solider, small wire, etc.) on the relay that is causing your direct ground. I could also be a bad coil on the 'multi-player' relay / circuit. Some 2 player games used a locking coil while some used a continuous duty coil to keep the 2nd player active through the full game.

Since your game seems to work on single player, it has to be in the 2nd player circuit.

(I'm assuming here that the game works fully as a single player.)
 
Then I would look to the 2nd player circuit. I suspect there is a connection that is touching or something fell (nut, piece of solider, small wire, etc.) on the relay that is causing your direct ground. I could also be a bad coil on the 'multi-player' relay / circuit. Some 2 player games used a locking coil while some used a continuous duty coil to keep the 2nd player active through the full game.

Since your game seems to work on single player, it has to be in the 2nd player circuit.

(I'm assuming here that the game works fully as a single player.)

I should clarify, when I hit the button to start a game, it doesn't reset the scores or do anything. If I hit the button again, it them blows the fuse.
 
I should clarify, when I hit the button to start a game, it doesn't reset the scores or do anything. If I hit the button again, it them blows the fuse.

Going by what wrkey mentioned,check the score reel coils. I have had these go bad. Also make sure all the coil stops are nice and tightly secured.
 
Okay.. so this tells us a bit more. The best way to chase down problems with these old machines is to break them down into individual processes. Don't think of it as a whole machine.. but a bunch of little individual processes each having an 'input' an activity and an 'output'. What I'm reading in this is....

You press the credit button (input) which will activate the game reset (activity) relay. This should force a lot of the reset relays to fire and the score reels to run until they are all at zero, the ball is kicked out, etc. Once all this happens the reset relay is switched off (output).

Since the score reels are not resetting the problem is occurring prior to that activity or it's that process where the problem lies. Question.. does the scoring motor run?

When you press the button the second time... it's trying to activate the 'second player' process so this maybe where it overloads the fuse.

But.. I suspect you'll find the problem in the original game reset process. Pull up your schematics and see where you need to look.

I really hope this helps and not just some late night rambling.
 
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