A schematic diagram for Sony hardware (board MBX-223). Shared as “Sony_MBX-223_-_M960_M970_-_L_MODEL_-_REV_SA.pdf” — a .pdf file, 894 KB.
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 @generalbios. 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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)