Zip archive for an Apple logic board numbered 820-00138, tagged with the project code X425 and the companion number 051-00330, which in Apple numbering usually refers to the schematic document. The archive is 1.55 MB, a size typical of a schematic PDF or boardview pair. Technicians use such material to trace power rails, follow the SMC and PPBUS lines and locate components during board-level repair. Unpack it and confirm the 820 number silkscreened on the PCB matches before trusting any values or part locations.
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 @notebookschematic. 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 | |
|---|---|---|
| @notebookschematic | 18 Jul 2020 | Open file on RM Schematics |
| @pepeelectronica | 21 Apr 2022 | Open file on RM Schematics |
| @schematiclaptopramkushwaha | 13 Sept 2025 | Open file on RM Schematics |
| @schematics_bios | 24 Jul 2026 | Open file on RM Schematics |
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