Archive aimed at the Apple iPhone 6S, delivered as a 4.32 MB ZIP with no extra details in the name. Open it to see whether it carries a schematic, a boardview or other reference files for the logic board. Such documentation helps when tracing power lines, locating capacitors and coils around the PMIC, and checking for shorts after liquid damage. Boardview formats generally open in tools such as OpenBoardView, while schematics are usually PDF. Verify that the board markings match the files before taking any measurements from them.
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 @esquematicosparatodos. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.