Lenovo X200 schematic in PDF form, 1.23 MB, with an extra imp tag in the name whose meaning is not stated; it matches the size of the other X200 schematic and may be a duplicate or alternate copy. No board number or revision is given, so verify the details from the drawing's title block against the motherboard. The document helps with tracing supply rails, power sequencing, charging and signal paths when diagnosing no-power or no-boot faults. Compare both X200 files before relying on either for component 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 @smschematics. 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.