Boardview for the MacBook Pro A2141, logic board 820-01700-A, supplied as a 461 KB ZIP marked BDV, meaning boardview. A2141 is Apple's model number and the 820- code identifies the logic board, with suffix A as its revision. Open the file in a boardview viewer to find components, follow nets and locate test points when measuring rails, chasing shorts or replacing parts. Compare the 820-01700-A label on your logic board before relying on component positions, because another revision may differ.
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 @schematiclaptopramkushwaha. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.