Ron -
You're in luck. About 8 months ago my wife came home from work with an old arcade manual. Someone she works with used to have this arcade cabinet, but sold it long ago. He knew I was "into" this kind of stuff. Well, I shoved it in my computer cabinet and there it has sat, until your post.....

The Good News: It is a Donkey Kong TKG3-TBL manual. I'd be happy to scan each page (24) for you to .PDF and send it to you.
The "Bad" News: I can't get to it tonight. Maybe tomorrow or tomorrow night. If it's not huge, I'll post it here so anyone can have it. If it is too big, I'll PM you so we can figure out how to get it to you.
Here's the one page schematic from the manual....I've attached it and named it with a ".png" extension, just download it and rename it to ".pdf" to view it.
Let me know if you want the whole manual....
BTW, I can't help with any technical advice, sorry.