Quanta-designed schematic for the Lenovo Flex 14 and Flex 15 laptops, project ST6 (written ST6_6A in the name), with the motherboard part number DA0ST6MB6E0. Quanta marks its boards with DA0 codes like this on the PCB, so that label is the quickest way to confirm a match. The 2.56 MB PDF is useful for tracing voltage rails, checking the EC and charger circuitry, and finding component references during a short hunt. Any PDF viewer opens it, and searching net names speeds up diagnostics.
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 @ITHINKHS. 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.