PDF documentation, 32.7 KB, for the 3SK269, indexed under schematics. The JIS code 3SK marks an N-channel field-effect transistor with four terminals, generally a…

Datasheet PDF, roughly 82.3 KB, for the 2SK222, catalogued among schematics. The JIS 2SK series denotes N-channel field-effect transistors, and the name supplies no…

Component sheet for the 2SC4615 NPN transistor, around 154 KB in PDF format and filed as a schematic.

The file name gives nothing beyond 2SC3460, a Japanese JIS designation in which the 2SC prefix denotes an NPN bipolar transistor.

Compact 41.4 KB PDF for the 2SB987, with an _E suffix not explained by the name, perhaps an edition or language marker.

Covering the 2SA1837, this 173 KB PDF is listed as a schematic but is expected to be a transistor datasheet.

Scanned PDF of the September 2006 issue of AudioXpress, the audio electronics magazine, filed here under schematics.

Copper-side PCB artwork for the Apex AX 20 amplifier project, a 208 KB PDF showing the track pattern rather than a circuit diagram.

Spanish-language schematic for a stereo amplifier titled Zener, rated at 1000 W, in a 1.15 MB PDF.

Class H power supply schematic, version 0.2, fuse type, marked final, in a 1.39 MB PDF.

Schematic documentation for the HT-S100F soundbar, in PDF format of around 8.40 MB, a model designation used by Sony, though the name gives no revision.

Named for the 2SD1618 transistor, a 116 KB PDF listed as a schematic but most plausibly the part's datasheet.

Datasheet-style document for the 3SK302, a 26.0 KB PDF indexed as a schematic. The 3SK prefix in Japanese JIS numbering denotes a four-terminal N-channel field-effect…

PDF for the 2SD1992A NPN transistor, indexed as a schematic though the name points to a part datasheet.

Compact 65.7 KB PDF for the 2SK2539, listed as a schematic but named after a discrete semiconductor.

Indexed as a schematic, the 124 KB PDF named 2SJ193 most probably holds the datasheet for that JIS-numbered P-channel FET.

The 466 KB PDF here is titled only 2SC4841, a Japanese JIS transistor code where 2SC stands for NPN.

Component sheet for the 2SA1940 transistor, provided as a 172 KB PDF and listed among schematics.

Datasheet for the 2N3055, filed here under schematics as a 39.8 KB PDF. The 2N3055 is a classic NPN silicon power transistor, usually in a TO-3 metal can, found in…

PDF for a Zener 100 W mono amplifier with a quasi-complementary output stage, as indicated by the Spanish word cuasi, 569 KB in size.

Top silkscreen layer for the Apex AA9 board, marked as MD revision 2, in a 58.7 KB PDF.

Yamaha PA 2400 amplifier schematic in a small 194 KB PDF. The name gives no revision or note about modifications, so it may represent the standard circuit, but confirm…

Datasheet for the 2SD612K transistor, a 303 KB PDF listed in the schematic section. The K at the end belongs to the type number and indicates a variant of the 2SD612…

PDF covering the 2SD1880, about 88.9 KB, listed as a schematic but named after a single semiconductor part.

Small 33.0 KB PDF for the 3SK144, catalogued as a schematic but named for an individual semiconductor, so it is most likely a datasheet.

Document for the 3SK227 semiconductor, stored as a 30.6 KB PDF and catalogued under schematics.

Reference sheet in PDF format for the 2SK2549 field-effect transistor, 373 KB in size. In the JIS numbering used by Japanese semiconductor makers, 2SK denotes an…

Component datasheet for the 2SK1057, packaged as a 55 KB PDF. The 2SK prefix marks an N-channel FET in the Japanese numbering system, and this number sits in the same…

This 93.0 KB PDF carries the part number 2SJ258 and nothing else. The 2SJ prefix, under Japanese JIS numbering, indicates a P-channel field-effect transistor, so expect…

A 214 KB PDF for the 2SA1429 part, catalogued as a schematic though most likely a data sheet.

Top-side print for a universal dos vas Matrix board, likely a dual voltage-amplifier-stage module, marked langsung print, meaning ready to print directly.

Very small PDF schematic named only 4kw2, probably a second sheet or variant of a 4 kW power amplifier design, though the name gives no further detail.

Compact 371 KB PDF schematic for the HT-RT40, a home theatre sound system model name, with no revision or board number in the file name.

The largest of this group at 465 KB, the PDF named 2SC4394 is most likely a full datasheet for that transistor rather than a board schematic, despite its index label.

At 275 KB, this PDF for the 2N6050 is one of the larger sheets in the set. It is indexed as a schematic, though it is most likely a full datasheet with curves.

Datasheet for the 2N5415, a high-voltage PNP bipolar transistor, stored as a compact 45.3 KB PDF in the schematic section.

Datasheet for the 2N5301 transistor, stored as a 252 KB PDF with an RE suffix whose meaning the name does not explain.

Bottom copper layout for the universal dos vas Matrix board, probably a dual voltage amplifier stage module, tagged langsung print for direct printing.

PDF bundle of Bose schematics, 1.53 MB in size, whose name lists no particular model, so the covered products must be confirmed by opening it.

Part datasheet for the 2SK2033, provided as a 296 KB PDF and filed under the schematic category. The 2SK prefix follows the JIS standard for N-channel FETs.