PDF schematic titled X60, 1.83 MB, with no brand, board number or revision stated in the file name. The model has to be confirmed from the sheet headers and part references before use. Schematics of this type serve for tracing supply rails, checking power sequencing signals, finding which component sits on a shorted line and reading resistor or capacitor values. Make sure the revision on the drawing matches the PCB you are repairing, as layouts often change between revisions.
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 @ITHINKHS. 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.