In the last five years, I’ve been working on the CS-80 Overall Circuit Diagram.
I cleaned the original scan, but also added colors to help localize the boards.
A lot of typos and oversights had to be fixed too (using either the service manual, or the CS-80 itself as a reference when needed). The layout of some parts was also modified to make understanding easier (this is particularly noticeable with the M board).
The file is provided as is.
If you still find errors, feel free to use this topic to list them. I'll update the file.
The file is a 14MB jpeg. Due to file uploading issues, I had to put it in a five parts split zip.