Schematic in PDF for a Sony power supply with part number 1-474-218-11, designed by Delta as model APS-272. Power supply diagrams like this let you follow the primary and secondary sides, check the PFC and standby circuits, identify feedback components and locate fuses and switching transistors when a unit is dead or cycling. Open it in any PDF reader. Compare the board part number printed on the PSU with 1-474-218-11 before relying on component values, since similar Sony supplies may differ.
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.