Schematic diagram for the Apple MacBook model A1502 logic board 820-3476, revision A, provided as a 12.2 MB PDF. Apple prints the 820 number on the logic board, so confirm it and the revision letter before trusting part values. Technicians rely on these pages to trace the PPBUS and other power rails, follow the SMC and power-on sequence, check sensor lines and locate fuses or shorted capacitors. It opens in any PDF reader, and pairing it with a matching boardview speeds up component location.
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 @schematics_boardviews. 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 | |
|---|---|---|
| @schematics_boardviews | 6 Jul 2021 | Open file on RM Schematics |
| @schematiclaptopramkushwaha | 23 Apr 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.