Repair package of 3.78 MB for the OSAMU2 project, marked CR-HPC-MV-MB-V1, apparently a different board variant from other OSAMU2 files. V1 seems to mark the first version, and MB likely means the main board. No brand or document type is stated, so open the ZIP and confirm its contents. Because variants of one project can differ in components, match the markings on the PCB first, then use it to trace voltages, follow signals and find 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 @ITHINKHS. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip