Compact 88.2 KB PDF for the 2SA1348, labelled a schematic but most likely a datasheet, given that the name contains nothing beyond the part number. In the Japanese JIS naming system the 2SA prefix marks a high-frequency PNP transistor. Use it in any PDF viewer to check the pinout, package outline, absolute maximum ratings and gain grades when diagnosing or replacing the device. The case marking commonly omits 2S, so look for A1348 and compare it before swapping.
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.