Help Powering CO2 Laser

Hi,
About two years ago someone was selling a pile of small CO2 lasers as complete and tested/tuned units:
http://img689.imageshack.us/img689/593/dsc0053nq.jpg
I missed out on the sale but managed to pick one up around a year ago intending to use it in a laser cutter for paper. I never got around to completing that project and have come back to find almost all information on how to power these units is gone.

From what I remember these units required only 30V/~10A on the red/black wires, but they might have also needed 12V on the orange line (as a PWM input?). This is a complete unit that has already been wired up so I mainly need to know how much and where to apply power.

Thanks,
Ryan