Schematic for the Apple board 820-4550, revision suffix -03, supplied as a 544 KB RAR archive that contains a PDF according to the name. The device model is not stated, so identify it by the 820- number silkscreened on the logic board and make sure the dash revision corresponds. Apple schematics are used to follow power rails, enable signals and sequencing, read part values and find which pages connect a suspected shorted component, making them a core reference alongside a matching boardview.
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 @SMART_PHONE_SCHEMATICS. Enginerys does not host this file.
All sources (6)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @SMART_PHONE_SCHEMATICS | 24 Jun 2024 | Open file on RM Schematics |
| @canalesquematicos | 26 Jun 2024 | Open file on RM Schematics |
| @GENERAL_SMART_PHONE_SCHEMATICS | 11 Nov 2024 | Open file on RM Schematics |
| @canalesquematicos | 26 Aug 2025 | Open file on RM Schematics |
| @SMARTSCHEMATICS | 7 Oct 2025 | Open file on RM Schematics |
| @cyberlanelectonik | 2 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.