Compressed schematic set for Apple board 820-2054, drawing number 051-7270, revision B000, 1.58 MB. A second 820-2054 archive with a different 051 number (7150, A000) exists, so the same board family evidently has more than one schematic release. Check which one matches the hardware before tracing rails or replacing parts. A schematic like this helps locate power controllers, follow enable signals and work out expected voltages. Open the RAR with WinRAR or 7-Zip and confirm the board number silkscreened on the logic board first.
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 @Mac_Shematic_Santale. 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 | |
|---|---|---|
| @Mac_Shematic_Santale | 5 Jul 2019 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 28 Sept 2019 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 2 May 2021 | 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.