JAMMA coin counter wiring

[naujoks]

Here's a picture of my board. I "inherited" it with the wires directly soldered onto the board connector. Unfortunately the connectors are in pretty bad connection, so unsoldering it and putting on a harness won't be an option.

What I did was connect +24V to Pin 20, as well as one of the coin counter wires.
The other wire from the coin counter I connected to Pin X.
The negative from the 24V PSU I connected to Pin 1 (GND).

Nothing happened (nothing fried either, thankfully).

 

[naujoks]

Picture below

 

[TSB]

Here's a picture of my board. I "inherited" it with the wires directly soldered onto the board connector. Unfortunately the connectors are in pretty bad connection, so unsoldering it and putting on a harness won't be an option.

What I did was connect +24V to Pin 20, as well as one of the coin counter wires.
The other wire from the coin counter I connected to Pin X.
The negative from the 24V PSU I connected to Pin 1 (GND).

Nothing happened (nothing fried either, thankfully).

Coin Counter on the Nintendo board is Pin20 to +24V & +Coin Counter, and PinX to -Coin Counter.
Installing the 24V ground to Pin1 is sharing ground between two power supplies. This can be (but isn't always) detrimental.

Here's the Coin Counter section of the schematics: (note that it goes to GND2, which is apparently shared)

 

[naujoks]

Thank you, so as far as I can see I wired things correctly.
Apart from sharing GND with two PSUs there doesn't seem to be any other issue.
Yet, it's not working. The counter itself works fine, when I connect its wires directly to the 24V PSU.

 

[Braydun]

Yes. That is correct if you have a 12 volt meter.

Hello sir, I realize this is an old thread and a few of these members seem to banned but I am wiring up my coin door now and have a question.

I understand the above diagram and how to hook up the counter properly but I want one counter to work for both of my coin slots. Do I connect the Counter 1 and counter 2 lines from the edge connector together and run it to the counter with one diode in line or would I need two diodes in separate lines? Thank you

 

[naujoks]

The counter will work with both coin slots, as the coin switches are actually both wired to the same connection.

 

[Braydun]

The counter will work with both coin slots, as the coin switches are actually both wired to the same connection.

That is what I like to hear! So Counter two on the edge connector is literally just if you want two coin counters? One for each slot individually?

 

[naujoks]

Pin 20 is counter, pin X is GND. There's no option to wire up two counters.
In your coin door, simply run the same wire between both coin switches. I think that's the way the original harness is set up as well, though it's possible that a separate wire from the other coin switch goes to Coin 2 on the edge connector, but I'm not certain. You don't need that though if you want coin drops to either slot register on the counter.

 

[Braydun]

Pin 20 is counter, pin X is GND. There's no option to wire up two counters.
In your coin door, simply run the same wire between both coin switches. I think that's the way the original harness is set up as well, though it's possible that a separate wire from the other coin switch goes to Coin 2 on the edge connector, but I'm not certain. You don't need that though if you want coin drops to either slot register on the counter.

Sorry for the confusion, I am actually wiring up a Rygar PCB to JAMMA! I don't see a coin counter at all in the Rygar pinout so does that mean one won't work?