Schematic for the Apple logic board 820-00923, supplied as a PDF in a 2.17 MB RAR, with LOHWILL added in the name. Apple's 820-xxxxx numbers identify the logic board rather than the computer model, so match it to the number printed on the PCB. Repairers use it to follow PPBUS and standby rails, check the SMC power sequence and find where a short comes from. Combine it with the boardview to locate the parts.
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 | 11 Sept 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.