The 2SD2252 is the subject of this 88.6 KB PDF, indexed as a schematic but best treated as a transistor datasheet.

Datasheet for the 2SD2216J, a 40.5 KB PDF listed as a schematic. The J is part of the type designation and marks a variant of the 2SD2216, so the exact suffix should be…

Part documentation for the 2SB1287 in a 63.5 KB PDF; the 1-2 in the name probably marks pages one and two of the sheet. No device or board details are included.

Document for the 2SD1624, a PDF of 144 KB stored in the schematic section; with only a part number in the name it should be treated as a datasheet.

Reference document for the 2SC3112 transistor, supplied as a 257 KB PDF and filed under schematics. The name holds only the part number.