ASUS Z170-E motherboard repair guide supplied as a RAR archive of 1.58 MB. The board uses the Intel Z170 chipset for LGA1151 Skylake CPUs. Such service documents generally map the power-up sequence, list expected voltages for CPU core, memory and chipset rails, and mark test points on board photos, which helps when a board shows no power, no display or a shorted rail. Unpack with any RAR-capable tool and verify the PCB revision matches the guide before replacing components.
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 @ZINFOSERVICECHANNEL1. 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.