Jpac wire issues

[itismejs]

I am build a 2 player cab. Each player has 6 buttons 1 joystick and 1 start button.
Thats 6 total plugging into jammaplus and 14 regular jamma connections total. There are a bunch of wires plugged into the jamma harness that go nowhere (just hanging there. I noticed the player 2 start button is not attached to anything at all.

Q1.Should I plug it into the jamma plus screw terminals on the jpac and program it in?
Q2. Where should the coin door wires be going to and how many are there. There are a bunch of wires on the coin door and a bunch go to a weird connector.

[OSCAR]

I am build a 2 player cab. Each player has 6 buttons 1 joystick and 1 start button.
Thats 6 total plugging into jammaplus and 14 regular jamma connections total. There are a bunch of wires plugged into the jamma harness that go nowhere (just hanging there. I noticed the player 2 start button is not attached to anything at all.

Q1.Should I plug it into the jamma plus screw terminals on the jpac and program it in?

Yes, this is what I would do.  But before you do so, verify that the cab's wire harness is wired correctly and that all the wires you need are connected to where they are supposed to go.  I never trust what some conversion-hack-tech did to a cabinet, I always go through all the wiring to make sure it is correct before I plug anything else into it.  It's not worth risking frying a J-PAC just to find out later that the cab wiring was messed up.

Q2. Where should the coin door wires be going to and how many are there. There are a bunch of wires on the coin door and a bunch go to a weird connector.

Many coindoors also had vibration switches, coin counters, and lamps that may be connected to the harness.  Again, what I do is pull out any wires that I'm not going to use (coin counter, vibration switch, etc), and just use what I need, which is typically just the coin detect switch and the lamps (if you have them).  Depending on the coin door, your lamps may take either 5 or 12 VDC.  Some cabs used other AC voltages such as 6.3 VAC for the lamps, but those can be connected to a 5VDC source instead.

[itismejs]

OK, I am checking it over as best I can. What sort of mess up in the wiring would mess it up? I gusse its safe to leave wires that arent going anywhere just laying around. I dont want the coin lamps as I will me using my own LEDs on a seperate plug. I do see 2 wires coming from the coin door and I think thats what I need.

[OSCAR]

Before you plug in a J-PAC, just make sure that the power wires (+5, -5, +12VDC) are where they are supposed to be.  The J-PAC can be damaged if +12 is connected where it isn't supposed to be.

[itismejs]

The power wires from the monitor?

[OSCAR]

No, the monitor AC power has nothing to do with the 56-pin jamma edge connector.  What I mean is that I would verify that the 56-pin edge connector in your cab is wired properly per this pinout:  http://www.dameon.net/BBBB/newjam.html

Additional info on cab wiring including how your monitor is powered can be found here:
http://www.dameon.net/BBBB/buildit.html

[pointdablame]

I don't mean to hijack this thread, but this is somewhat related.  I have an old 4p Xmen cab I want to convert to a setup just like your controls (2p).  Do you think I should just buy a new Jamma harness seeing as how the one in there now is set up for 4p? Does it matter?  I'm new to the JAMMA pinout, so I'm really confused here.

Oscar (or anyone else) - To change my Xmen to a 2p setup, should I get a new harness, or just rewire the one in there.  It couldn't hurt to get a new one could it?  Thanks for any help.

itismejs - you can have your thread back, sorry about that man

[SirPeale]

JAMMA pinouts are 2P by nature. Other players are added via harnesses attached to the board itself.

[pointdablame]

I see, so what you're telling me is I should actually dig around in the cab a bit before I open my big mouth??    Thanks Peale, I'll have to give a look in the cab once I get a chance to move it.

[SirPeale]

Well, yeah, you should definitely look @ the cab, and check out the wiring diagram that Oscar posted.

[microwrx]

I am build a 2 player cab. Each player has 6 buttons 1 joystick and 1 start button.
Thats 6 total plugging into jammaplus and 14 regular jamma connections total. There are a bunch of wires plugged into the jamma harness that go nowhere (just hanging there. I noticed the player 2 start button is not attached to anything at all.

Q1.Should I plug it into the jamma plus screw terminals on the jpac and program it in?
Q2. Where should the coin door wires be going to and how many are there. There are a bunch of wires on the coin door and a bunch go to a weird connector.

The 1 and 2 player coin door and start buttons are part of the JAMMA standard so as long as they are going to the correct pins as per the pinout Oscar posted then you should have no reason to use the screw terminals on the J-PAC for anything other than the extra game buttons.  Don't go reprogramming your J-PAC and wiring to it unecessarily.  Solder the wires to the correct pins on the JAMMA connector and keep it nice and simple.  If you can't or don't want to go soldering then sure use the screw terminal and reprogram.

I'm wondering if the wierd connector on the coin door harness is the credit board harness for a coin mech.  That's what mine had but it still all wnt to the JAMMA harness from there.

[itismejs]

I cut all the wires from the coin door area. I am going to but a switch there that will credit BOTH players when ya put it in. (similar to someone elses cab)

[SirPeale]

I cut all the wires from the coin door area. I am going to but a switch there that will credit BOTH players when ya put it in. (similar to someone elses cab)

Why would you do that?  What if you want to play a one player game?  I suppose then you'd just have two credits then.  Never mind.