Schematic in PDF form for the Apple board 820-2301, carrying the project name Alamo K3, packed into a 1.60 MB RAR. The 820 prefix is Apple's logic board numbering scheme, and the schematic is the companion to a boardview of the same number. It is used to read power-sequencing logic, rail names and signal paths when a board fails to power on or shows other faults. Extract and open with any PDF reader, and check the 820-2301 marking on the PCB before relying on component values.
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 (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 6 Jan 2024 | Open file on RM Schematics |
| @cyberlanelectonik | 4 Jul 2026 | Open file on RM Schematics |
| @cyberlanelectonik | 14 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.