MSI MS-6506 revision 0A data packed as a RAR file of 486 KB. Besides brand, board code and revision, the name gives no details on the type of document or firmware inside, so extract it to check. Revision 0A is typically an early release and may differ in layout from the later 1.0 version, which is catalogued separately. Confirm the PCB marking matches before using it for locating components, checking a short or reflashing the BIOS chip, and keep a backup of the original.
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 @IT_SERVICE_WORLD. 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.