Lenovo TY 80A repair archive in RAR format, roughly 1.13 MB. The name only states the model designation and gives no board number, revision or document type, so confirm what is inside after extraction. Older Lenovo consumer notebooks were frequently built by ODMs such as Compal or Wistron, so read the actual board number on the PCB and compare it with the drawings. A matching schematic helps trace power rails, find test points, check the charger circuit and locate the source of a short.
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.