Apple schematic in PDF form, 2.35 MB, named simply 5g, which likely points to an iPhone 5 generation model, although the exact device is not spelled out. No board number or revision appears, so check the content against the logic board markings. iPhone diagrams are used to trace PMU outputs, follow charging and Lightning connector lines, check backlight and display circuits and locate components on a shorted rail. Open it in a PDF viewer with search, and confirm which model it covers before relying on part values.
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 @tamirat_moobile. 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.