Apple iPhone 7 Plus schematic in PDF format, roughly 1.76 MB. The file name gives no logic board number or revision, so verify against the board before trusting sheet references. Schematics like this are used to follow power rails from the PMU and charger, check audio codec and baseband circuits, read FPC connector pinouts, and determine which components share a net when a line shows a short to ground. Combine it with a placement drawing or boardview to find parts physically. Any PDF viewer can open and search it.
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 @schematic_mobiles. 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.