Quanta 0C1 board documentation at revision 1A, built around the Samsung Exynos 5250 ARM processor, supplied as a 713 KB RAR archive. SEC in the name refers to Samsung Electronics as the SoC maker. The file most likely holds a schematic, helpful for tracing PMIC outputs, power rails and signal connections on this ARM-based design. As no device brand is named, check the 0C1 marking and revision on the PCB before using the drawings to locate components or test points.
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 @IT_SERVICE_WORLD. 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.