Apple logic board schematic for board number 820-00850, identified by the LB# prefix in the name. Apple numbers its logic boards 820-xxxxx, and the number is silkscreened on the PCB, so a direct match is easy to check. At 14.4 MB this is a full multi-page diagram covering power rails, SMC signals, the charging circuit and the connectors. Repair technicians use it with a boardview to trace missing rails, check pull-ups and find shorted capacitors, and the revision letter on the board should be checked against the drawing.
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 @hrtechno. 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 | |
|---|---|---|
| @hrtechno | 23 Jul 2021 | Open file on RM Schematics |
| @alischematics | 13 Sept 2021 | Open file on RM Schematics |
| @pepeelectronica | 28 Apr 2022 | Open file on RM Schematics |
| @ShareMan_Electronic_Files | 5 May 2025 | Open file on RM Schematics |
| @schematics_bios | 3 Aug 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.