Boardview for the Apple A2159 MacBook Pro, logic board 820-01598, compressed into a 183 KB zip. Apple identifies its logic boards with 820- part numbers, and the matching schematic is listed separately. The boardview shows component placement, net names and connections on both sides of the board, helping you probe test points and isolate shorted capacitors or failed rails. Open it in FlexBV, OpenBoardView or a similar viewer, and check that the 820 number on your board matches exactly before use.
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.
How to open a .zip file
Compressed archive that every operating system opens without extra software.