help with galaga to jamma adapter

[jackspicer]

Well im confused, i just bought a galaga pcb and i was going to put it in one of my jamma cabs via a machine made JAMMA Adapter http://www.jammaboards.com/store/galaga-to-jamma-adapter/prod_224.html

but while reading up on how to make one i ran across a problem, it says "you need to convert your AC powered board into the DC switching power supply voltages required for JAMMA cabinets. If you want to convert an AC powered PCB to JAMMA you will need to make the necessary modifications to the power input."
Now it doesnt say i need to do anything like this on the sight that sells the machine made JAMMA Adapters.

this is what it says to do to my board to get it to work, but theres no pictures so it doesnt make any sense. http://www.arcades.plus.com/galjamm2.htm

And this is the easy way but it says "It leaves all of the components that will no longer be used on the PCB, and may actually damage them, preventing it from being converted back to AC should the need arise." http://www.arcades.plus.com/galjamm1.htm

So anybody else have this problem. what should i do?

[Kevin Mullins]

but while reading up on how to make one i ran across a problem, it says "you need to convert your AC powered board into the DC switching power supply voltages required for JAMMA cabinets. If you want to convert an AC powered PCB to JAMMA you will need to make the necessary modifications to the power input."
Now it doesnt say i need to do anything like this on the sight that sells the machine made JAMMA Adapters.

Right, the original machines/boards had an AC power supply.
The components listed in one of those how-tos are what converted that AC to DC to run the board.
So basically bypassing those components is what they are referring to. (since you will have an already DC power supply)

what should i do?

Convert your board with one of the methods you found.
You would have to in order to use a standard switching power supply anyways if you wanted to.

[jackspicer]

hey im not very smart with this kind of stuff but it says here "http://www.arcaderestoration.com/index.asp?OPT=3&DATA=1798&CBT=24" that  today there is no need to set the 5 volts high with these 15 amp power supplies. The one thing you want to do when making an adaptor for a Pac series is to put plenty of 18 gauge wires to ground & to the 5 volt inputs (old 7VAC) as the more you put, the easier the voltage/current travels to the pcb by the simple ohm's law principle of parallel resistances lessening the total resistance... But he was talking about pacman.

[Kevin Mullins]

Pac-Man, Ms. Pac-Man, Galaga, Galaxian, etc, etc...... many were built about the same.
So don't a game name throw you.

It's good to think things through, but it is also possible to "over think" things.

All that is really saying is those board drew a lot of current, the weaker power supplies would have a little trouble an may have needed tweaked up just a tad to compensate for it.
The newer, higher amperage power supplies can be generally set right at/about 5volts and be good to go.

Really still depends on YOUR power supply.

The one thing you want to do when making an adaptor for a Pac series is to put plenty of 18 gauge wires to ground & to the 5 volt inputs (old 7VAC)

They refer to the heavier guage wire because of the increased amount of "current" those boards pull form the power supply.
Much smaller guage wire would simply burn up and cause havoc.