Lenovo laptop schematic in PDF for board NM-C361, with the name pointing to the FG541 and FG741 project codes. NM-prefixed numbers follow the LCFC numbering used for Lenovo-designed boards, which you can confirm on the PCB silkscreen. Technicians use these pages to trace the USB-C or DC-in charging path, the system and CPU rails and the EC signals, and to locate test points. Make sure the PCB reads NM-C361 and check the revision page before relying on values.
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 @afsschematicfree. 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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)