PDF schematic whose name points to a Lenovo TY100 machine (brand misspelt in the file name) and a board code written as LA 2592, which follows the shape of Compal numbering. At 963 KB it matches the size of a second copy marked -1, so the two are likely the same document. Such diagrams are used to follow the power path from adapter input to CPU core, check signals in the boot sequence and locate components by reference. Compare the PCB silkscreen with the stated board number before working from it.
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.
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The same file was posted more than once. If one link is dead, try the next.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.