Architecture diagram in PDF for Apple board 820-00939-A, project J174. At 109 KB it is a block-level overview rather than a full schematic. It shows how the main chips, power domains and buses connect, giving a quick orientation before you work through the detailed circuit pages. Apple's 820-xxxxx numbering identifies the logic board and the letter suffix its revision. Use it to plan where a power or data fault might sit, then confirm in the circuit diagram, and check the board number printed on the PCB 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 @ShareMan_Electronic_Files. Enginerys does not host this file.
All sources (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @ShareMan_Electronic_Files | 10 May 2025 | Open file on RM Schematics |
| @notebookschematic | 7 Mar 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.