Schematic in PDF form, 343 KB, with the uninformative name 10A79 that gives no device, brand or board number. The code may refer to a part or a project number, so open the file and check the title block to find out what it covers. Once identified, a schematic like this lets you trace power rails, signals and component values during fault finding. Before relying on it, compare the board identification printed on the PCB with the drawing to make sure they match.
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 @afsschematicfree. 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.