Schematic in PDF format, about 4.19 MB, for the Wistron board numbered 14279-1. The name carries nothing else, so the laptop model and brand must be confirmed from the PCB or other sources. Wistron uses this five-digit number with a dash-revision suffix, and its boards appear in laptops from several brands, notably Dell, Acer and Lenovo. Open it in a PDF reader to trace power rails, find the charger and VRM circuitry and follow signal nets. Check that the number printed on the board matches before relying on 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 @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.