Archive for Apple logic board 820-00840 revision A, 4.85 MB in RAR format. Apple marks its logic boards with 820-xxxx or 820-xxxxx part numbers, the most reliable way to identify the matching board. The name does not state whether it contains a schematic, boardview or firmware, so check its contents. Such files help technicians trace power rails, locate components and diagnose shorts or reflash the boot ROM. Confirm the 820 number and revision on your board before using 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 @schematicslaptop. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.