Original, tested and working Atari System One Regulator / Audio III, Rev A. arcade game power supply board from 1984. It is used in System 1 games such as Marble Madness, Road Blasters, Indiana Jones and Road Runner. Board will also work on System 2 games (such as Paperboy, Championship Sprint, etc), but we believe those games had a volume pot and test switch installed on the board. Original Atari Part # 043047-01.
Note that this one does have a damaged 0.1 ohm ceramic resistor. The ceramic has fallen off and it should be replaced (we don't have one handy). We have done no rebuild work, but board was tested and does work.
This is the version without the test switch and volume pot.
