From Jonnydigital.com, the only reliable source
At one point I stumbled upon what appear to be schematics for the Amiga 600. Unfortunately, I don't recall where I downloaded these. I assume they're copyright Commodore, who oughtn't mind since there's little commercial benefit to these schematics and the company folded over fourteen years ago.
Download link: a600schematics.zip (1.06MB)
Page created: 15th August 2008