MSI MS-7122 motherboard schematic at revision 0A, an early engineering revision, supplied as a 903 KB PDF. It documents power stages, CPU core regulation, memory and chipset circuitry and I/O connections, letting a technician trace rails, check signal paths and identify component values during repair. Because 0A precedes production versions, the board on the bench may differ; MSI prints the MS-number and revision on the PCB, so compare both before trusting the drawings, and look for a 1.0 version if parts do not line up.
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 @pepeelectronica. 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.