Schematic for the Apple A1502 logic board 820-3476-A, in PDF form packed into a 1.41 MB archive. The pages lay out power architecture, charging, SMC, display, memory and storage circuits with net names and component values. Repairers read it to understand power-up sequencing, find which rail is missing and identify replacement part values. Apple boards carry the 820 number on the PCB, and the revision letter should match. It pairs well with the matching boardview, and any PDF reader can open it.
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 (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 7 Mar 2024 | 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.