RAR archive of 843 KB labelled 223-1-4-0-1-R10. It shares the numbering style of several other unbranded archives, and R10 plausibly marks revision 1.0, though the name confirms neither the device nor the content type. Extract it to determine whether it is a schematic, a boardview or a firmware dump. Match any identifiers against the PCB silkscreen first, and when flashing a dump, read and save the existing chip contents with a programmer.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)