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Step-by-step how-to: wiring coin door power through J-PAC

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krick:
Actually, I already figured out a simple, easily reversible modification to the J-PAC to allow it to supply coin door power.  Now, my only problem is figuring out which JAMMA wire to use.

According to Bob Roberts, he wires up the JAMMA harness with wire "F" sending +12v to the coin door.

However, in looking at the JAMMA harness in my cabinet, it looks like "C" and "4" also go to the coin door but with +5V each.

Is there any kind of standard?

krick:
I just modified my J-PAC.

Instructions and pictures are here...

http://mame.3feetunder.com/jpacmod/

RayB:
"C" and "4" (5v) might be used to trigger the coin counter...

I don't see the point of using JAMMA to wire up cabinet lights... Lights are pretty much a basic cabinet feature regardless if it is JAMMA or some other format.

eggedd2k:
could you not just use 12v from the cabinet's psu?

krick:

--- Quote from: eggedd2k on June 21, 2005, 10:37:42 am ---could you not just use 12v from the cabinet's psu?

--- End quote ---

That only works if your cabinet still has a PSU.  Mine doesn't.  I disconnected it when I removed the arcade game and put in the MAME computer.

Though, you can tap 12V off of the computer's PSU if you like.

Another good option is to wire up a transformer between the marquee power and the coin door lights that changes the voltage from 120AC to 12VDC (or whatever your lights need).

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