Catalogued as a schematic, this 155 KB PDF named 1F1-1F7 indicates a numbered component series, most plausibly rectifier diodes in steps of reverse voltage. The name does not identify a device, maker or board. Such a datasheet is useful for comparing ratings across the family, choosing a grade equal to or higher than a failed part, and checking package dimensions. Open it in any PDF viewer and confirm the marking on the original component before ordering 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 @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.