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| Help me with my Jamma Cabinet |
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| lettuce:
Help ??? |
| RayB:
OK Listen, if you can't trace wires from power to components, then do it backwards. Look at all wires coming off the monitor and see where they go. You should find 5, maybe 6 of them going to the jamma harness (red, green, blue, sync and ground). Then there should be slightly thicker wires for power. 2 of them. 1 is the voltage, the other is ground. See where these go. It's entirely possible that you have a newer monitor that doesn't even need iso transformer. On the other hand, maybe someone wired it so the main power line comes off the ISO, but the ground goes elsewhere (electrically this works, but is probably NOT the correct way to have it wired for safety reasons.) |
| lettuce:
Thanks for the reply Ray, i found out that the AC wires run all the way down the cab to the right side of the ISO transformers, on the left side theres a blue and brown wire attached to the iso tran, these go to a switch terminal right at the front of the case (guess for truning the machine of with ease when changing a game board) then out of the switch to the fuses, and then on to the AC filter, then to the Mult power supply (which ive removed), and finally to the back of the cab to the mains terminal! Im guessing by the way its wired up, im going to need to keep the switch termial (though i could by pass that completly), the fueses, and the AC filter in the cab! Do i need to remove the, +5v, -5v, and +12v pins from the Jamma connector, when pluging it up to a J-PAC, or are they ok to leave connected, as i notice the the J-PAC does not connect to these? And to get the coin mech & Marque lights, i need to connect them uip to a 12 V power supply, or to my PCs power supply? |
| paigeoliver:
Ok, you guys are making this WAY too complicated. Remove the blue power supply box entirely, tape off any wires coming from it. Any wires coming from the same spot should be taped TOGETHER (this keeps you from accidently breaking the ground loop, or AC wiring loop. The mystery board is either a credit multiplier or a ticket dispenser controller. You don't need it, but leave it alone. Your JPAC goes into the JAMMA harness, the extra harness coming off the control panel gets chopped open and those wires go to the extra position headers on the JPAC. Nothing else need be, or should be messed with. Marquee light will almost certainly be AC powered from the transformer, never seen a 12 volt one. Coin mech lights might very well be AC powered as well, if not then I believe the JPac has a 5 volt tap on it. Trust me on this one, remove that power supply. |
| Lilwolf:
Shouldn't you try and keep the power supply.. And just get some switches for it? If you ever want to run a standard jamma board in you cab, you will still need it... and if you want to easy swap the pc / jamma board, you wan't it easy to add/remove. |
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