Schematic for the IBM-branded ThinkPad X61, stored as a 1.42 MB PDF. The name carries a bracketed numeral typical of a duplicated saved copy and lists no board number or revision; it appears to match another X61 file of identical size, so compare both before keeping one. Use the diagram to trace power rails, check the charger and CPU regulator sections, and locate components and test points when hunting a short. Verify the board markings match the title block, and open it in any PDF viewer.
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 @cyberlanelectonik. 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.