Apple MacBook schematic for project M42B, logic board 820-1889, as a 1.38 MB PDF. Apple 820-xxxx numbers identify the logic board design, and that number is printed on the PCB, so it is the key to matching this document to the machine on the bench. The drawings let a technician trace PPBUS and other power rails, follow the SMC power-on sequence, and locate parts for short-to-ground checks. Verify the 820 number and revision before replacing components.
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 @laptexdna. Enginerys does not host this file.
All sources (5)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @laptexdna | 17 Jul 2020 | Open file on RM Schematics |
| @one5technology | 25 Nov 2020 | Open file on RM Schematics |
| @laptexdna | 25 Jul 2022 | Open file on RM Schematics |
| @generalschematics | 15 Sept 2024 | Open file on RM Schematics |
| @generalschematics | 16 Sept 2024 | Open file on RM Schematics |
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.