One of my first stops for a replacement switching power supply is Arcade Shop because of their snazzy plug and play adapter. Unfortunately they are out of stock at the time of this writing. So I decided to make my own. I opened my old Donkey Kong jr power adapter to harvest goodies. I used my dremel to chop off the factory power adapter plugs.
I pulled an Arcade Shop adapter from another Donkey Kong game I had previously installed and toned out the four values 5, -5, +12, GND.
(note: at the time of the above pic i had the jumper set to send 12v to the coin counter, this is not where I normally keep it. And set as seen above sends 12 vdc to the NU pin at 9P. I wrote the values on my diagram when jumper was in the OFF position, which i think most of us keep it. So ignore where my jumper is set and pretend it is in OFF position when you look at my value at 9P. No other value changes other than the NU spot on 9P when you change the jumper).
Red 5v
Blue -5
Orange 12v
Black GND
(if you wanted to send 12 v to the coin counter you would ad another orange wire to the NU position on 9P)


I attached a little piece of plastic to the back of the adapter to cover the exposed connections, a coating of silicone would also do well here.
BONUS:
I was treated to a BONUS inside my old power supply. A rainbow wire interconnect power wire (which I also needed) to link power between my 2-board stack at P3 (video board) and P12 (CPU board), it was a 12 pin wire, so i just trimmed off the red and brown wire.
