Power sequence diagram for Apple logic board 820-01598, labelled J213 and X1536, a compact 85.9 KB PDF. Sequence charts show the order in which rails and enable signals should appear, from standby power through to full power-on. That lets you see where startup stops by measuring each step in order. Use it with the full schematic and boardview for the same board number, and confirm the 820 marking on the PCB first.
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 @LaptopsBoardview. 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 | |
|---|---|---|
| @LaptopsBoardview | 1 Jun 2023 | Open file on RM Schematics |
| @generalschematics | 19 Oct 2024 | Open file on RM Schematics |
| @ShareMan_Electronic_Files | 10 May 2025 | Open file on RM Schematics |
| @pkbiosbdv | 27 Oct 2025 | Open file on RM Schematics |
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.