RAR archive for the Quanta IL1 motherboard, revision 1A, used in the Positivo Mobile M970 notebook, 907 KB in size. Positivo is a Brazilian brand that sourced boards from ODMs like Quanta, so the IL1 code printed on the PCB is the key identifier. The contents are not listed, but such packages usually contain a schematic for following rails, checking shorts on input lines and locating components. Make sure the board revision matches 1A before trusting part values or connector pinouts.
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.