Homebrew PCBs

I can ALMOST do DLP without the external hv power supply, but it 
works better with a variable hv supply. It should be possible to 
change the voltage on the internal hv supply - there are adjustment 
pots all over the board - but I do not have a schematic, and I'm 
reluctant to start adjusting things without knowing what I'm doing. 
That said, I might give it a try because it would simplify this 
project a lot. I do have a "dead" supply (killed by an errant 
experiment) if someone would like to trace the circuit.  I also do 
have the schematic of the hv supply for a Brother printer, if that 
helps any. Any ideas would be welcome!

Mark