Question about Jpac with Jamma power supply

[mrserv0n]

I have setup ipacs in the past but this is my first real mame arcade cabinet using arcade monitor and a jamma cab.

I am a little confused on the power supply part, I know Jpac does not need to be hooked to it.

My arcade monitor does though so do I basically just unplug my Jamma harness from my die hard PCB, plug it into the Jpac, and turn the arcade machine on like normal or is there something I need to disconnect, I dont want to fry it, I did hook up my grounds to my pushbuttons linking together than plugging into the ground on the Jpac properly.

[RayB]

*sigh* A power supply is not the same thing as a power transformer.

Your monitor should be plugged into a big "block" type of thing, that gets power from the AC line into the machine. THEN there's this OTHER metal box that's the power supply. It converts AC to DC and outputs 5v, 12v, etc.   Your monitor is surely NOT plugged into that and THAT is what everyone says should be disconnected. The DC POWER SUPPLY.

If you plug the JPAC in backwards, it will get fried. Also, some power supplies burn out if you leave them on with no load, so that's the 2nd reason they say to disconnect it. But then some power supplies auto-shut off if there's no load, and in that case you're actually ok to leave it as is.

[SirPeale]

*sigh* A power supply is not the same thing as a power transformer.

Your monitor should be plugged into a big "block" type of thing, that gets power from the AC line into the machine. THEN there's this OTHER metal box that's the power supply. It converts AC to DC and outputs 5v, 12v, etc.   Your monitor is surely NOT plugged into that and THAT is what everyone says should be disconnected. The DC POWER SUPPLY.

Except in his case, he's likely correct.  His monitor is getting its AC power from the power supply.  It's a new enough game that it likely has the isolation on the chassis. 

Power goes into the game thru the power supply.  Inside it splits to the power supply and then a separate AC line for other things in the cabinet.  Usually via a 3 pin Molex connector.

Because of this, he'll have to rewire his cab for a separate AC line to the monitor.  Not hard, but makes it hard to have both the existing wiring and Mame centric wiring.  Unless, of course, he only wants the Mame.

[mrserv0n]

I got it hooked up and working fine thanks, No need for the sigh bro not everyone has done this a million times, thats what forums are for.

[Flip_Willie]

I got it hooked up and working fine thanks ...

   Hey, I just wanted to make sure you actually got it working safely.  I did this a while back and it wasn't as easy as I first thought it would be.

   I am just checking to make sure that you aren't running your arcade power supply to power your monitor, lights, etc. while simultaneously running Mame.  In short, most arcade power supplies burn up if they are running and can't supply a DC load to the original arcade pcb.

   If you are sure got it working correctly, then great; however, if you are running the arcade power supply and the computer at the same time, then you are probably risking damage to the power supply.

   I am a noob myself, so I could be wrong.  Anyway, just trying to help.

Just as it is,
Flip Willie

[mrserv0n]

Ive run it for about 8 hours straight now and seems to be stable.... would it have "burned" up already if it was
 incorrect?

[Flip_Willie]

Ive run it for about 8 hours straight now and seems to be stable.... would it have "burned" up already if it was
 incorrect?

   Well, unless you have a power supply that auto-shuts off like RayB talked about than there should be a problem.  That is what I have heard anyway.

   I would have thought it would have had some sort of problem by now, but then again, I don't know for sure.  I will let someone more knowledgeable than I am tell you for sure.

   I am not trying to be rude or anything.  I just figured that it might be annoying if you had the wrong idea and your cabinet caught fire or something.  

 
Just as it is,
Flip Willie