Small 99 KB RAR archive for an Apple board identified as J113 with logic board number 820-00165-A. J113 is Apple's internal project code, and 820-00165 is the board number printed on the PCB, with A as the revision letter. The name does not say what the archive holds. At this size it is more likely a boardview than a full firmware dump or schematic, so open it before use. A boardview opened in a viewer such as FlexBV or OpenBoardView shows part locations, nets and test points for fault finding.
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 @schematicslaptop. Enginerys does not host this file.
All sources (19)
The same file was posted more than once. If one link is dead, try the next.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.