Firmware archive for the Apple MacBook Pro A1226, project M75, labelled MBP5 and carrying the 051-7225 number, which Apple uses for the schematic or board drawing reference. No logic board number is given in the name. The 1.36 MB RAR likely contains an EFI boot ROM dump for reprogramming the SPI flash of a machine that will not start. Check that your board belongs to this model, read and keep the existing chip contents first, and confirm the image size matches the chip.
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 @biosarchive. 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.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →