Archive for the Apple MacBook Air A1369 logic board 820-3023-A, with K21 as the Apple project code. Apple numbers logic boards in the 820-xxxx pattern, and the letter suffix marks the board revision. The roughly 1.86 MB RAR contents are not listed, but for this kind of item it may hold schematic, boardview or firmware files. Compare the 820 number and suffix on your board before relying on it, and save the original EFI chip contents before any reprogramming.
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 (9)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 25 Apr 2021 | Open file on RM Schematics |
| @LaptopsBoardview | 29 Apr 2021 | Open file on RM Schematics |
| @pepeelectronica | 21 Apr 2022 | Open file on RM Schematics |
| @generalschematics | 19 Oct 2024 | Open file on RM Schematics |
| @boardviewsandachematics | 1 Sept 2025 | Open file on RM Schematics |
| @cyberlanelectonik | 14 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 24 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 27 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 14 Aug 2026 | Open file on RM Schematics |
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.