Schematic for the Lenovo E255 notebook as a 928 KB PDF. The file name names only the model, so the ODM board number and revision have to be read from the drawings themselves and matched to the PCB in hand. The document serves board-level work: following the adapter input and battery charger path, checking standby and main rails, locating the EC and BIOS chip, and tracing connector pinouts when a port or the screen fails. It opens in any PDF viewer, and text search speeds up finding nets.
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 @cyberlanelectonik. 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.