A schematic diagram for Acer hardware (board LA-4431P). Shared as “Acer EMachines E520 E720 (COMPAL LA-4431P KAWE0).pdf” — a .pdf file, 686 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 @smschematics. 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)