Here the 2SK1234 N-channel field-effect transistor is described in a 46.1 KB PDF. The 2SK code marks it as an N-channel device under the Japanese JIS scheme, used in…

Datasheet-style PDF for the 2SD1302, 46.0 KB, listed in the schematic category. The 2SD prefix follows the Japanese JIS designation for NPN bipolar transistors in…

Compact 44.8 KB PDF for the 2SD1051, with an _E suffix in the name whose meaning is not stated, possibly a language or edition marker.

Datasheet for the 2SD669 NPN transistor in a small 32 KB PDF, maker not stated in the file name.

Named only 2SC4365, this 148 KB PDF is filed with schematics but should contain the manufacturer datasheet for that transistor.

Part number 2SC2882 names this 137 KB PDF, which the index treats as a schematic. The 2SC prefix in the JIS system indicates an NPN bipolar transistor, making a…

PDF document for the TDA7491P, a 1.45 MB file that is most likely the component datasheet rather than a board schematic, judging by the part-number name.

Studiomaster M1000 schematic, supplied as a 576 KB PDF. Studiomaster builds professional audio gear such as mixers and amplifiers, and a diagram like this is used to…

PDF schematic whose name is only the code CDX-G1152U. That code matches the style of a Sony car audio head unit model, but the name gives no further revision or board…

Main document for the subwoofer 7294 design, version 1.1, a 138 KB PDF without a further descriptor in its name.

Peavey transistor cross-reference sheet in a compact 96.6 KB PDF. Peavey amplifiers often use in-house part numbers on semiconductors, and a cross list like this maps…

Compact PDF schematic whose name points to a parametric equalizer combined with a subwoofer filter stage.

PDF schematic for an active subwoofer project designated PSW500, a 284 KB document credited to Rat Net, whose name describes it in Spanish as an active subwoofer.

Mirrored version of the Apex AX 20 copper-side layout, a small 62.3 KB PDF. The reversed image is meant for toner-transfer or photoresist methods, where the pattern must…

Reference document on toroidal transformers, a 5.83 MB PDF; no device, brand or model is named.

Equalizer circuit diagram supplied as a 263 KB PDF. The file name only says equalizer and gives no brand, model or board reference, so it cannot be tied to a particular…

PDF for the complementary TIP3055 NPN and TIP2955 PNP power transistors, 50.1 KB, indexed under schematics.

For the 2SD2098 transistor, this 159 KB PDF is categorised as a schematic but follows the usual naming of a part datasheet.

Stored as a 190 KB PDF, this document is named after the 2SD1936, a JIS-registered NPN transistor.

The 2SK1375 N-channel field-effect transistor is covered by this 150 KB PDF, filed under schematics in the catalogue.

Named after the transistor type 2SC4646, this 148 KB PDF most likely contains the part datasheet. No board, model or revision is mentioned.

Larger 546 KB PDF datasheet covering the 2N5400, a high-voltage PNP small-signal transistor; the size suggests a scanned or multi-part document.

Datasheet for the 2N5209 transistor, a 278 KB PDF with an RE suffix that is not explained by the name.

Reference sheet for the 2N2905 PNP silicon transistor, a 55.3 KB PDF placed in the schematic category.

Datasheet for the 2N2222A transistor, a 53.4 KB PDF whose name carries a Phi tag, most likely identifying the manufacturer edition.

PDF data sheet of 47.6 KB for the 1T411 transistor, filed in the schematic category. Following the Soviet designation scheme, the 1T prefix denotes a germanium…

Sony SA-WGT5D schematic in PDF format, 15.9 MB in size. The name gives only the model, which follows Sony's SA- prefix for speakers and subwoofer units, so open the…

Sheet metal drawing for the subwoofer 7294 project, version 1.1, a small 23.7 KB PDF; blacha is Polish for sheet metal.

Schematic of a 1000 W audio power amplifier rated into 2 ohms, marked R2, RLVA SE1, 2012 revision 1, in a 110 KB PDF.

Soft start circuit schematic, saved as a 1.78 MB PDF; the note in the name indicates it was converted from another format.

PDF schematic of 45.2 KB for a Dynatech V5000 SMD preamplifier with display section, plus an inverter design attributed to Pappu.

Schematic sheet in PDF format called RF1, 292 KB, whose name gives no device, manufacturer or board number.

PDF covering the 3SK189, about 178 KB in size and listed in the schematic category, though the name points to a single component datasheet.

Datasheet document for the 2SK1103 transistor, filed as a 29.5 KB PDF. Parts beginning with 2SK are N-channel field-effect transistors registered under the JIS scheme…

Part number 2SC4157 is the only clue in the name of this 125 KB PDF, which sits under schematics but is effectively a transistor datasheet.

Audio schematic for the Samsung SM-A21s covering microphone, loudspeaker and earpiece, PDF, 3.82 MB.

Cellular network section of the Samsung SM-A11 schematic, saved as a 4.33 MB PDF. It covers the RF transceiver area, power amplifiers, antenna switches, filters and the…

Cellular network section of the Samsung Galaxy A02s (SM-A02S) schematic in PDF format, 3.70 MB.

PDF document of 577 KB for the AD620, filed in the schematic category although a part-number name like this normally indicates a component datasheet.

Listed as a schematic, this 246 KB PDF carries the name 2SJ201, a JIS part number for a P-channel FET, so it is best treated as a component datasheet.