PDF schematic for Apple model A1347 with logic board 820-3228, revision A, inside a 1.44 MB RAR. Apple uses 820-xxxx numbers for its logic boards, and the number printed on the PCB must match since one model can ship with several boards. Technicians rely on it to trace power rails, check the SMC and power sequencing signals, and locate the source of shorts. Open with any PDF reader and combine it with a boardview for component placement during repair.
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 | 20 Aug 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.