Apple MacBook A1181 logic board boardview for 820-2279, revision A. The 551 KB BRD file opens in OpenBoardView, FlexBV or Boardviewer, showing parts, pins and nets for this polycarbonate MacBook. Apple numbers logic boards with the 820 prefix, and the trailing letter marks revision. Use it to locate components, check diode mode readings on connectors and trace power rails during repair. Verify that the board is 820-2279 with the A revision, since other A1181 boards exist.
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 @boardviews. Enginerys does not host this file.
How to open a .brd file
The most common boardview extension. Several unrelated formats share it, which is why one viewer opens a .brd and another refuses it.