Coin Counter

[simplesi]

Just wondering if someone could help me fix my coin counter. I picked up an old shell of a cocktail cab (Taito). There was not much inside apart from the service button and the coin counter. All the harness, pcbc, etc were taken out.

I am installing a multiboard with a jamma harness and wanted to link up the coin counter. I haven't a clue what's what. Any help would be greatly appreciated.

Here are some pics:

What does the yellow wire connect to and the bluish one? Is one connected to the Counter 1 on Pin 8 on the harness and the other the 5V? How does the board know that you have put a coin in? It's all magic to me.
simplesi2012-04-13 12:49:24

 

[karlcdoe]

well, it depends on a number of factors. According to the JAMMA standard that I just googled the coin counter outputs are on pins J and 8. It's possible that the multigame board doesn't support them anyway but you also need to find out a bit more info, I can't remember if you have to use both those pins and wire (1) meter across it or if they are for two meters, in which case you would tie the other end end of the meter to GND or the +ve DC supply. I think you also need a diode to prevent voltage spikes.

I'd probably start by using a logic probe or 'scope on pins J and then 8 on the PCB and see what they do when the game 'coins up' I would guess they go low or high. If they do nothing then you aren't going to get much further than that unless you have a separate credit board like a 'klingon'

 

[Setch]

its been a while since I looked at the counter in my cocktail, isnt there another piece that connects to the back of the coin draw that makes connection with the 2 metal pads on top of the counter.

Do you have this too, as I think it is needed for the counter to work, others may be able to confirm if this is needed for what you want to do.

Setch

 

[simplesi]

Thanks guys!

The bit in the second photo is the other part that connects inside the cab and the other bit attches to the coin box.

The multigame board supports the counter. Read the Bob Roberts bit online, but can't fathom the diode thing.

 

[simplesi]

Still struggling. I managed to test the counter with a 5v line and the ground. Everytime I touch the 5v line, it turns the counter. I guess it's a 5v one, then. Not sure what I should be doing. HELP!!!!