MSI schematic in PDF form for the TP.MS1306.PB772 board, which the index links to MSI board number MS-1306. The Russian word in the name simply means schematic. At about 830 KB, the document is used to trace supply rails, follow signals and identify components when diagnosing power faults, shorts or dead sections. MSI uses MS-xxxx numbers for its boards. Any PDF viewer opens it, and the board code printed on the PCB should be checked against the drawing before relying on its values.
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 @pdf_servicemanual. 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.