Apple logic board schematic for board number 820-02841, provided as a plain PDF of about 4.07 MB. Apple uses the 820-xxxxx pattern for its logic board part numbers, which are printed on the PCB itself, so verify the number there before working. The name does not state the Mac model. The diagram supports tracing power rails such as PP3V3 and PPBUS, following power sequencing, identifying component values and locating sensors and SMC-related signals during liquid-damage or no-power repairs. Any PDF reader with text search opens 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 @cynetitsolution. Enginerys does not host this file.
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The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @cynetitsolution | 16 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 5 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.