Schematic PDF for the Apple board 820-00426, with the LO suffix in the name left unexplained. Apple uses 820-xxxxx numbers for its logic boards, and this number is printed on the PCB itself, which is the reliable way to match a MacBook. Open it in a PDF reader to follow power rails such as PPBUS, the SMC and charger circuits, and signal lines when diagnosing no-power or no-charge faults. Match the board number exactly before using component references.
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 @jdschematicsworld. Enginerys does not host this file.
All sources (7)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @jdschematicsworld | 1 Mar 2025 | Open file on RM Schematics |
| @cynetitsolution | 1 Mar 2025 | Open file on RM Schematics |
| @cidschematicandboardviewofficial | 6 Mar 2025 | Open file on RM Schematics |
| @cidschematicandboardviewofficial | 17 Mar 2025 | Open file on RM Schematics |
| @ShareMan_Electronic_Files | 28 Apr 2025 | Open file on RM Schematics |
| @smschematics | 26 Sept 2025 | 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.