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Help me with my Jamma Cabinet

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lettuce:
Hi all, am new to the forums and require some assistance. Have just purchased the following Jamma cabinet,



I am looking at converting it to house a PC running MAME. I shall be using a J-PAC and ArcadeVGA card to use the controls and the Monitor. Where im stuck is, im not sure what componets inside the Jamma case i need to remove and which i need to keep. I understand that u need to remove the power supply of the cabinet, leaving just the monitor isolating transformer??? Im just having trouble identifying whats what inside the cab. Heres some pic of the inside ,


I think it might be one of those Jamma Plus cabinets, cos it has 6 buttons wired, just cant work out where the extra wires are connected to. Does the monitor draw its power from the J-PAC when its fitted? Just would be really helpful if someone knew of a web site that had a guide to converting a Jamma cab over to a mame one

RayB:
There's plenty of info on these boards. So do lots of reading before you start...

The blue box is the power supply.

The big massive heavy looking block thing is the Isolation transformer. This is what the monitor gets power from. You need to keep this.

The blue connector is of course your harness. You might want to find a JAMMA pin-out schematic online and compare to your connector and make sure that it is in fact JAMMA. (Probably is, but it would damage your parts if it turned out not to be jamma)

All you really need to do is "unpower" the switching power supply. You don't have to physically remove it. Just be "safe" with how you disconnect it, making sure no live wires are left dangling around in the bottom, etc...

lettuce:
Thanks for the reply Ray, yeah it is a jamma, its got the pin outs on a sticker inside the cab, but the extra buttons on the control panel dont seem to be conect to the jamma connection, which i cant understand where there wired to. Could you tell me what the blue and red circled componets are in the picture below


and the same for this circuit board, also notice theres what i think is a 12 pin plug with nothing attached, and have jumper switches at the base of the circuit board


So could i complete remove the blue

AlanS17:
The JAMMA standard only support 3 buttons per player and JAMMA+ supports 4. If you have extra buttons (more than 3 per player) that don't lead to anywhere, it's because they don't fit into the JAMMA harness. They plugged directly into the game's PCB.

In the top picture, the red circle is the isolation transformer for the monitor. You have to keep that. I can't tell what's circled in blue because there's just too much other stuff in the way (including a blue circle) but it's probably a fuse block. If it's wired into the isolation transformer, you'll need to keep that too.

In the bottom picture, the red circle looks like some some sort of connector (obviously) but it's not possible to say what it's connected to without following the wires. Is it plugged in? I can't tell. I would say the blue circle is the PCB except it looks pretty small for that. Perhaps it's an auxillary board like an audio board or something. It's chopped off, though. Can't really tell.

You're going to need better pictures if people are going to be able to see what you've got in that second picture.

And you can completely remove the blue power supply from the machine to make space. Just make sure the power to the monitor isn't bridging across the AC contacts on the power supply. If so, you can easily bypass the power supply, but you can't simply just unplug everything. I can give a better explanation if that didn't make much sense.

Goz:
Depending on what boardset is in the JAMMA cab. It could have a kick harness like CPS to make 6 buttons work in a JAMMA cab.

-Goz

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