PDF schematic for Apple logic board 820-2390, without a model name or revision in the title. At 2.83 MB it should cover the full board, including power supply stages, sequencing and the connections between the main chips. Apple uses 820- numbers for its logic boards, so the matching number on the PCB is the key check before trusting values. Use it to trace missing rails, understand the power-on sequence, find components related to a short and verify part values, preferably together with the boardview file for the same board.
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 @alischematics. Enginerys does not host this file.
All sources (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @alischematics | 13 Sept 2021 | Open file on RM Schematics |
| @pepeelectronica | 28 Apr 2022 | Open file on RM Schematics |
| @ShareMan_Electronic_Files | 29 Apr 2025 | Open file on RM Schematics |
| @schematics_bios | 3 Aug 2026 | Open file on RM Schematics |
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.