Service schematic for the Sony KDL-60NX720 LCD television, a 60-inch model as the name indicates, provided as a 16.2 MB PDF with a Chinese-language file title. Diagrams of this kind let a technician follow the power supply, main board and panel interface circuits, trace standby and backlight rails, and identify parts when diagnosing no-power or no-picture faults. Any PDF reader opens it, and searching by reference designator speeds up locating components. Check that the board labels in the set match the pages before relying on voltages or part 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 @gunvantrathore. 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.