Schematic in PDF form for Apple logic board 820-03285, with A3113 noted in the name, compressed into a 4.47 MB rar. Apple uses 820-xxxxx part numbers for its logic boards, and the number etched on the PCB is the reliable way to pair documents with hardware since many Mac models share housings. Use the schematic to follow power sequencing, PPBUS and other rails, and to understand signal paths around the SoC. Pair it with the matching boardview for component locations.
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 (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 15 Nov 2025 | Open file on RM Schematics |
| @cyberlanelectonik | 4 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 27 Oct 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.