I need help wiring up my Cabinet. Specifically Jamma power to Power supply

McCHitman

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I need help wiring up my Cabinet. Specifically Jamma power to Power supply

So I put my Jamma harness (from Bob Roberts) together following the hardmvs site since I am restoring a Neo Geo MVS 4-25, and I'm currently at the stage where I want to test the monitor, board and game cart to see if they work.

My issue is that their are more connections coming from the Jamma harness than there is hookups on my Switching Power supply. I am unsure if every connector needs to be connected for everything to be working properly, so I came here before I blew something up.

What confuses me is that I had a generic Jamma harness (chinese symbols???) and all the power cables on that were spliced together. I wasn't sure about that harness so I purchased a new one.

I have posted pics below.
 

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So I put my Jamma harness (from Bob Roberts) together following the hardmvs site since I am restoring a Neo Geo MVS 4-25, and I'm currently at the stage where I want to test the monitor, board and game cart to see if they work.

My issue is that their are more connections coming from the Jamma harness than there is hookups on my Switching Power supply. I am unsure if every connector needs to be connected for everything to be working properly, so I came here before I blew something up.

What confuses me is that I had a generic Jamma harness (chinese symbols???) and all the power cables on that were spliced together. I wasn't sure about that harness so I purchased a new one.

I have posted pics below.

Ok I don't know much about the game cart but you only have to supply the power to the pcb and monitor. The extra wires can be for coin door, coin door lights, etc. Not all wires will be use if you are just testing the board and monitor. You only need to supply the requirements of the pcb (the board/cart). Usually you would use +5 +12 and ground. Some boards need -5, -12 and -22. Some for ram and some for the roms (save game scores). You just need to make certain all unused wires are taped up or secured so they will not short on anything.

Here is the Jamma pin out just for reference

http://www.jammaboards.com/jcenter_jamma_pinout.html
 
So I put my Jamma harness (from Bob Roberts) together following the hardmvs site since I am restoring a Neo Geo MVS 4-25, and I'm currently at the stage where I want to test the monitor, board and game cart to see if they work.

My issue is that their are more connections coming from the Jamma harness than there is hookups on my Switching Power supply. I am unsure if every connector needs to be connected for everything to be working properly, so I came here before I blew something up.
Probably depends on the board, but I would be wary of leaving +5 lines floating. You want all four +5 lines hooked to the one +5 output on the power supply.

Unless you have a newish monitor, you will need to power it through an isolation transformer. Here's an overview of the AC side of wiring up a game: http://www.therealbobroberts.net/acwiring.html

What confuses me is that I had a generic Jamma harness (chinese symbols???) and all the power cables on that were spliced together. I wasn't sure about that harness so I purchased a new one.
Now you have a spare harness.
 
Probably depends on the board, but I would be wary of leaving +5 lines floating. You want all four +5 lines hooked to the one +5 output on the power supply.

Unless you have a newish monitor, you will need to power it through an isolation transformer. Here's an overview of the AC side of wiring up a game: http://www.therealbobroberts.net/acwiring.html


Now you have a spare harness.

The last picture is basically what my power board looks like now but I have a plug and a switch connected...

How would you guys go about connecting all of the power connectors to the terminal? I have 3 ground wires, 4 +5 wires, and 2 -5 wires.

Should I remove the forked terminals I have on there and splice all 4 +5's together into one fork, or do I need to use all them for it to work properly?
 
I normally use the larger yellow fork connectors and put two wires into each one. When necessary (eg +5v) I put a fork connector on either side of the PS terminal.
 
I normally use the larger yellow fork connectors and put two wires into each one. When necessary (eg +5v) I put a fork connector on either side of the PS terminal.

With the way my Switching power supply is set up, I don't know if I can put a fork on both sides of the terminals, but I'll try. I might have to remove the black guard that separates terminals if I can.
 
I normally use the larger yellow fork connectors and put two wires into each one. When necessary (eg +5v) I put a fork connector on either side of the PS terminal.

So I can't put a fork on each side due to the way the PS is made, but I tested this-I can put 2 wires in one fork, then stack the forks on one side and screw them down, and they survive a pull test. Is this ok to do? Or do they have terminal forks large enough that will support up to 4 of the +5 wires?
 
So I can't put a fork on each side due to the way the PS is made, but I tested this-I can put 2 wires in one fork, then stack the forks on one side and screw them down, and they survive a pull test. Is this ok to do? Or do they have terminal forks large enough that will support up to 4 of the +5 wires?

Yeah, that should be fine.
 
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