Hello Bought a used K40 and it has a old PSU I would like to upgrade the PSU but a wiring diagram would help out a ton and a link for a $$ friendly PSU that will work on my k40
We might be looking at one of the earliest K40/K50 lasers. The name on that left wall mounted board is LCShenhui and they don’t exist any more but a few forums ask about them back in 2010.
I’ve looked at this pics a bunch and best I can come up with is that they had separate HV PS and LV PS and what we see is the LV PS transformer at the bottom of pic #3 and the board on the left wall is a 24V/5V power supply. As you mentioned, a few more pics and info might show how things are wired thus exposing what they do.
This looks like a setup for a Moshi board controlled laser. Can you please give us a picture of the controller board and that will let us know more about what the rest of the system is about.