Schematic for the iMac 27 inch A1419, EMC 2546, built on Apple logic board 820-3299, provided as PDF in a 2.29 MB RAR archive. Apple schematics label rails and signals by name, letting you follow power sequencing from standby supplies through SMC control to main rails. Use it with the matching boardview to go from diagram to physical location. Confirm the 820 number on the board matches 820-3299, since other A1419 logic boards differ in layout and circuitry.
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 | 1 Oct 2023 | Open file on RM Schematics |
| @generalbios | 6 Oct 2023 | Open file on RM Schematics |
| @cyberlanelectonik | 16 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.