Circuit schematic for the Lenovo IdeaPad Y470, a PDF of about 1.13 MB. Only the model is stated, so the ODM board code and revision must be read inside and checked against the PCB before measurements are trusted. Typical uses include tracing the adapter and battery path, checking voltage regulators for shorts, following CPU and GPU power stages, and finding where the EC and SPI BIOS chip sit in the circuit. Any standard PDF reader displays it, and searching by part number helps.
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.