Schematic for the Apple logic board 820-00928, supplied as a PDF inside a 3.18 MB RAR archive. Apple uses the 820-xxxxx numbering for its logic boards, and the number is printed on the PCB itself. A technician uses the circuit diagram to trace power rails, follow signals between chips, and identify the expected voltages when diagnosing a short or no-power fault. Open it with any PDF reader. Check the board number and revision suffix on your logic board, since revisions can differ slightly in components and values.
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 (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 30 Jul 2022 | Open file on RM Schematics |
| @boardviewsandachematics | 2 Sept 2025 | 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.