Duplicate of the Lenovo ThinkPad Z60m Quanta archive tagged BV1, the same 1.46 MB RAR. The name confirms Quanta as the board maker, while the exact contents and revision are not stated. Check that the Quanta project code on your board matches the material before using it. Repair technicians rely on such schematics to measure rails in the correct sequence, identify the always-on and main power circuits, find the BIOS flash and EC, and track a short to the failing capacitor or MOSFET.
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 @generalschematics. 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.