Documentation for the ThinkPad X201i, the variant of the X201 line commonly fitted with Core i3 processors, in a 1.52 MB RAR archive labelled IBM. The name gives no board number or revision, so inspect the files to see whether a schematic, a boardview or both are included. Such material supports tracing power rails, locating components and test points, and diagnosing shorts. Schematics open in a PDF reader, while boardview files need a viewer such as OpenBoardView. Match the PCB markings 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 @IT_SERVICE_WORLD. 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.