For the 2SK1470, a Japanese-coded N-channel field-effect transistor, this 97.9 KB PDF serves as component reference material even though it sits in the schematic category. No device or board is named, so expect a datasheet with ratings, characteristic curves and a pin diagram. A technician checks it to confirm which terminal is which before in-circuit measurement, to verify drain-source voltage rating and to evaluate replacements. Ensure the printed code on the transistor exactly matches this number.
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.