PDF datasheet, 135 KB, for the part numbered SM3903. No manufacturer, package code or revision is stated in the name, which carries only the bare part number. Such a sheet is used during repair to identify pin functions, read voltage and current limits and follow the typical application schematic when tracing a fault around the IC. It opens in an ordinary PDF viewer. Confirm the device marking on the board matches SM3903 and check for package variants before ordering or fitting a replacement.
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 @datasheet_technar_org. 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.