Compressed service guide, 1.41 MB RAR, for the ASUS ROG Strix Z270H Gaming motherboard built on the Intel Z270 chipset. Expect documentation of the power sequence, voltage rails around the CPU VRM, memory and PCH, plus marked measurement points that help locate shorts and missing voltages on a board that will not start. Open the archive with 7-Zip or WinRAR and read the pages in a PDF or image viewer. Check the revision printed on the PCB before relying on specific 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 @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.