Datasheet for SM15T6V8A, an 82.2 KB PDF. The part number follows the naming style used for transient voltage suppressor diodes, where 6V8 commonly indicates a 6.8 V rating and the A suffix a unidirectional tolerance grade, though the sheet itself should confirm this. Technicians check such protection diodes when a supply rail is shorted to ground, since a failed TVS often reads near zero ohms. Open it in any PDF viewer and compare the package code and marking on the board before 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.