Apple logic board schematic for board 820-02016, revision 07, in a 6.52 MB PDF. The name itself gives only the board number, which follows Apple's 820- numbering for logic boards. Technicians use it to follow power rails from the USB-C input through the main regulators, find test points and diagnose shorts or no-power faults. Opens in any PDF reader. Check that the number and -07 suffix etched on the board match before relying on part values.
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 @ithinkhs_casediscussion. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.