An 86 KB PDF covering the 2SA1896, a PNP bipolar transistor under the Japanese JIS 2SA designation. The name gives only the part number, so this is best treated as a component datasheet, even though it is filed under schematics. Repair work with such a document usually means confirming the pinout, package type and absolute maximum ratings, then picking a replacement with equal or better voltage, current and power figures. A diode-mode meter test against the stated polarity helps confirm whether the original part has failed.
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.