PDF of about 89 KB covering the 10BQ030, listed as a schematic in the index. The part number matches a small surface-mount Schottky diode series, so the file should be a component datasheet rather than a circuit diagram. Technicians consult such sheets for reverse voltage rating, forward current, leakage and package outline when diagnosing a shorted rectifier or picking an alternative part. Low-voltage Schottky parts can show noticeable leakage, so take the readings in context and verify the marking first.
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.