Compressed schematic package for Apple board 820-1889, labelled project M42A, about 1.25 MB. No 051 schematic number or revision is stated, unlike sibling files for M42B and M42C, so check the title block inside the PDF to identify the release. These pages support rail tracing, signal following and component location when a board does not power on or has a short. Extract the RAR with 7-Zip or WinRAR and compare it against the physical board markings before relying on 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 @Mac_Shematic_Santale. Enginerys does not host this file.
All sources (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @Mac_Shematic_Santale | 5 Jul 2019 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 28 Sept 2019 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 2 May 2021 | 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.