Archive for Apple model A1990 with logic board 820-01814, revision A. Apple identifies its logic boards with 820-prefixed numbers printed on the PCB, and the suffix letter marks the revision. The 10.5 MB archive content is not specified and may contain a schematic, a boardview or both, so extract it to check. Technicians use such material to follow power sequencing, locate components and check shorts on dense logic boards. Verify the 820 number on your board before relying on it, as similar models use different boards.
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 (8)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 28 Feb 2021 | Open file on RM Schematics |
| @LaptopsBoardview | 29 Apr 2021 | Open file on RM Schematics |
| @pepeelectronica | 24 Apr 2022 | Open file on RM Schematics |
| @generalschematics | 19 Oct 2024 | Open file on RM Schematics |
| @boardviewsandachematics | 2 Sept 2025 | Open file on RM Schematics |
| @schematics_bios | 24 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 1 Aug 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.