Schematic in PDF format for a design called R9550L, with V10 in the name most likely indicating version 1.0 of the drawing. No manufacturer or board number is given, so identify the hardware by matching chip markings and reference designators against the pages. At 312 KB the file should hold readable circuit sheets useful for following supply rails, checking regulator feedback networks and finding where a shorted line originates. Make sure the version printed on your board corresponds to this revision before relying on 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 @pepeelectronica. 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.