PS Audio PPP

Hi there ,
i am happy owner of PPP V2 ,
Its still working as should,but considering the edge I want to change the capacitors,
It is a 230V version,the fluctuations of voltage in my area are sometimes more than +10 -20 volt,
I would love to have the schematic of it,maybe I can improve some more if I open it for change the capacitors,I have the skills to make do it.
Thanks in advance
Puiu