A schematic diagram (board 14279-1). Shared as “14279-1 (2).pdf” — a .pdf file, 4.19 MB.
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 @nityatechnology2020. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.