Namco System 11 schematics

 https://www.arcade-projects.com/threads/in-the-making-of-a-namco-system-11-schematics-and-i-need-some-help.27317/

Namco System Super 22 Teardown : Free Download, Borrow, and Streaming : Internet Archive

 https://philwip.com/wp-content/uploads/2024/02/Namco-System-11-Mother-PCB-Schematics.pdf