Problem Statement: Need to understand the K40 power supply to build a new control pannel.   Solution: Found my power supply on Amazon: Conclusion: Simple power supply.   Reference: https://www.amazon.com/Cloudray-Laser-Power-Supply-Engraver/dp/B079M6RWZ1/ref=sr_1_1?dchild=1&keywords=b079m6rwz1&qid=1590457737&sr=8-1