Service manual for Nikko NA-590

Hi all, this topic was found but closed about 10 yrs ago. Hifiengine has the service manual / schematic for the NA-590 II, but I am looking for the NA-590.
I have one that is putting out 37v on right channel.
Hoping for a parts list with values and schematic. I am aware that I can order one for about $20 Cdn, but that kind of money can buy me 3 eggs, so thought I'd try here first as well as discuss the mods that were done.
@adason would you still have something from 10yrs ago?
Thanks