A schematic diagram for Apple hardware (board 820-00863, 820-00864). Shared as “iPhone x PCB_820-00863-09+820-00864-06 (2).pdf” — a .pdf file, 1.12 MB.
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 @canalesquematicos. 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)