Schematic in PDF form, packed in a RAR, for the Apple Mac mini A1347 logic board 820-2993, with the project code J40I given in the name. Apple numbers its boards in the 820-xxxx format, so match the code on your board before relying on the drawings. Technicians use these pages to trace power rails, follow the power-on sequence, find sensing resistors and check signals on a board that does not start or has a short. Any PDF reader opens it, ideally alongside a boardview for locating parts.
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 | 5 Dec 2023 | Open file on RM Schematics |
| @cyberlanelectonik | 4 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.