Schematic for the Lenovo E390, likely the ThinkPad E390, although the name carries only the model and no board number, ODM code or revision. Before using it, compare the project code in the PDF title block with the one printed on the motherboard. The diagram helps with tracing power rails and signals, locating the charger, VRM and embedded-controller circuits, and finding the parts on a shorted line during no-power diagnosis. At 1.49 MB it opens in any ordinary PDF viewer and can be searched by net name.
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 @schematicslaptop. 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.