Compressed RAR package, 57.3 KB, containing the iPhone 5C boardview in BVR format. Unpack it and load the file in a viewer that handles BVR to browse component placement and net connectivity on the logic board. Clicking a pin reveals every other point on the same net, which makes tracing charging, backlight or audio circuits much faster than probing blind. The archive carries no revision information in its name, so confirm the layout matches the board on your bench before replacing parts based on 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 @cyberlanelectonik. 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.