Boardview in BVR format, named iP5 and presumably for the iPhone 5 logic board, stored in a 62.2 KB RAR archive. The file name says nothing about board revision, so check the markings on your board against it. In a compatible viewer you can click a part to highlight its connected net, making it quicker to trace power lines, find where a rail is shorted and identify unmarked components. It works well alongside a schematic when diagnosing no-power or no-charge faults.
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 @SMART_PHONE_SCHEMATICS. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.