Schematic in PDF format, 847 KB, identified only as M750 with no brand, device or revision stated in the name. Open it and read the title block to determine the manufacturer, board number and revision before using it. A circuit diagram like this helps a technician trace power rails and signals, check the charging and standby circuits and locate components when chasing a short. As M-prefixed codes are used by several makers, confirm the match against the PCB silkscreen.
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.