(Topic ID: 75689)

Bally 1964 startup sequence

By PhilGreg

10 years ago

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  • 14 posts
  • 5 Pinsiders participating
  • Latest reply 10 years ago by Garrett
  • Topic is favorited by 1 Pinsider


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#1 10 years ago

I need to go see a Bally Grand Tour (1964) that has a score motor running endlessly. I'm familiar with 1970s Gottliebs, so I figure the first thing to check are the score reels.

Pinrepair.com also has the following startup sequence for 1970's Ballys. Does anyone know how close this would be to reality with a 1964 machine?

Bally Start-Up Sequence.

Coin is inserted into the game. The coin relay will energize. It will stay energized through its own hold-in switch and a score motor switch. If the credit button is pressed (instead of a coin being inserted) and there are credits, the credit relay will be energized which energizes the coin relay.
The coin relay will energize the lock relay (this turns the general illumination on). The lock relay will stay energized through its own hold-in switch and a delay relay switch.
The coin relay will energize the reset relay, through a game over relay switch (if your game won't start, try cleaning the contacts on the game over relay; a very common Bally problem).
The score motor will operate. This will energize the score reset relay(s). The score reset relay(s) will attempt to clear the score reels to zero. This is done by operating the score motor. Each turn of the score motor will operate the reset relay once, which in turns moves a score reel one position, until the score reel(s) are at zero. If the score motor continues to run when a game is started, there's a good chance the zero position switch on the score reel(s) is dirty or mis-adjusted.
The coin relay, through the score motor, will advance the total play meter.
The reset relay, through the score motor, will reset the stepper units (zero the ball count and player units).
The coin relay, through the score motor, will decrement the credit unit.
The coin relay, through the score motor, will energize the game over latch relay coil.
The coin relay, through the score motor, will energize the 100,000 relay latch coil(s) (if the game supports scores greater than 99,999).
If the outhole switch is closed (single ball games) or the ball trough switches are closed (multi-ball games), a ball is released to the shooter lane through the outhole relay (single ball game) or ball release relay (multi-ball game) and the score motor.
On multi-player games, the credit button may be pushed again to add a player. This time the coin relay will not energize the reset relay. Instead it will (through the score motor) advance the total play meter, decrement the credit unit, and advance the coin unit.

#2 10 years ago
Quoted from PhilGreg:

I figure the first thing to check are the score reels.

Yep^^ my 1965 Bally mimics that startup, score reel switches dirty/broken or check the wires at them.

#3 10 years ago

I couldn't figure it out...
When the machine starts up the motor starts running immediately and never ends. I tried to manually activate the Start and Game Over relays and could get a game to start. At some point I could get it to start by pressing the start button, but I still had to fiddle around with those Start-Reset-Game Over relays before I could do so.

I also tried removing all J connectors, and when it's in "never ending" state, it remains so. I left with the bottom board to work on it at home - I'm pretty sure something's off with one of those relays. I'm starting to make some sense of those 1960's schematics too, I was used to the Gottlieb ones but those are something else...

#4 10 years ago

Ok... so either this sequence is way off, either it's just a matter of remapping the relay names to what I have on there.

Some of the relays I have on the bottom board are:
Game Over
1st shot
Multiple Play Coin
Ball return

I also have the (huge) schematics, but they don't explain the startup sequence. For Gottlieb, these were in the manual, not the schematics, and I don't know if there were ever manuals made for those machines, but PBR doesn't have them.

After cleaning and adjusting all the switches on the bottom board, I kinda like the behavior I'm having though. Score motor doesn't run when I turn it on, and when I manually depress the start relay the motor runs shortly then resets the start relay.
I'd like to figure out how to simulate that the board is within the machine and close the correct score reel 0 position switches, the correct switch indicating there are credits available and anything else it would need...

#5 10 years ago

You have a schematic, find the score motor and see which SWs start it. Check each RE that can start the SCR motor see if you can identify the one holding. Don’t forget the SCR Hold SW.
So there maybe 5 or more REs that start the motor running, once the cycle is complete all REs that can start the SCR Motor SWs should be open. One is obviously closed. It may be closed due to miss adjusted or the RE is staying powered up, or not powering up.

So right now we don’t need to know the start sequence. Just which SW is not opening. Once you find this SW we can work on why.

If you need help reading the schematic, scan the bit with the SCR motor on it and up load here.

#6 10 years ago

I think that the motor endlessly running part is probably fixed, as it used to run endlessly even with all the J connectors plugged in, which it doesn't anymore.
I figure the start sequence probably needs input from just 2-3 switches to work, which is what I'd like to figure out so I can make sure the bottom board is working on its own before I go back to the guy's place and install it...


#7 10 years ago

You can't really make the bottom board work with out PF and Back board. the scr motor is waiting on zero signals from both.

#8 10 years ago

but in the end it's just a matter of jumping the right wires to simulate that the reels are at the 0 position, that there are credits and I'm not too sure what else it would need from the playfield.

I'll look some more on the schematics to see if I can locate these... if not, well I'm pretty confident with my cleanup, I'll just put it back in there and see what happens.

#9 10 years ago

If you have a bonus unit, then that will be one. often under play field.

On your schematic there are pics of the Jones plugs. Look at them and you will see numbers like 35-2. In this case it would be Yellow/ white run #2. This makes it unique. Anytime you see this number it is the same wire. So while looking at your schematic, say a RE and you see a number that appears on the Jones plugs then you know there is a connection at the plug. I’m pretty sure insert is the play field and panel is the back board. Anyway just count the pins and dbl check. Hope this helps you identify items that go through the Jones plugs.


#10 10 years ago

PS if there is only two digits “70” (Orange/no trace) this number is the same as 70-0. Numbers like [10] is a thicker wire.And the number on the top in its own box ( 20), (18), (16) above, is the number of connectors for that plug. the colour chart is also on the schematic.

#11 10 years ago

Thank you Chris - I'll go install the bottom board back at the guy's place this weekend - I'll check all backboard switches and the bonus unit if there is one at the same time.
I'm pretty sure that should do the trick.

Not a big fan of those schematics compared to the Gottlieb ones - Gottlieb have a summary of all relays, where to find them, how many NO/NC are on there, color codes with letters instead of numbers - but I'm starting to get it.

#12 10 years ago

I have two Williams EMs from that era that had that same issue when I bought them. Both had a stuck coin switch.
You've probably looked at those, but if not, you might just take a quick look.

#13 10 years ago

Finally got it.
When the start relay activates, it closes a switch that powers up the coil to reset the start, reset, game over and some others I forget.
That switch has a stiff metal blade to help it stay in place - the metal blade was broken 2/3 of the way, so the switch would always bend back after a while, until it didn't make contact, so the start switch wouldn't get reset and the machine would behave as if the start button was stuck.

#14 10 years ago

Good find.

Many times the problems are fixed with a good set of eyes, that's the beauty of EM's.


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