Speaker protection circuit for a 2.1 audio setup, a user-drawn design in a 139 KB PDF. Such boards normally delay relay engagement at power-up to stop thumps and…

Quanta schematic for the ZQH project in PDF form, compressed into a 679 KB RAR. The name gives no laptop brand or revision, so check the board marking to confirm it is a…

Schematic for the Dell 1420 laptop, ELSA GM platform, provided as a PDF in a 2.85 MB RAR archive.

MSI MS-7250 motherboard schematic in PDF, zipped to 7.77 MB; the name gives no revision or model name. MS-xxxx is MSI's internal board numbering printed on the PCB.

Schematic set for the Samsung SM-A710FD, the dual-SIM Galaxy A7 2016, packed in a 6.98 MB RAR.

Schematic PDF with a short name showing only JV50, a MV tag, -1 and 0109, which is likely a project code with a revision and date, though the brand and model are not…

Service schematic for the Samsung Galaxy A50, model SM-A505F, supplied as a 7.32 MB PDF.

A 5.40 MB PDF schematic for the Samsung BN44-00496A power board. BN44 marks Samsung TV power supply units, and the board sticker should show the same number and revision…

Nokia 6680 circuit schematics stored as a 1.48 MB PDF for this 3G Symbian phone. The name carries no board number or revision, so compare your main board marking with…

Nokia 6200 schematic diagrams provided as a 946 KB PDF. Only the model name is given, with no board code or revision, so compare the PCB markings against the sheets.

Datasheet PDF, 137 KB, for the 2SD1841, part of the Japanese 2SD range of NPN bipolar transistors, catalogued here under schematics.

Reference sheet for the 2SD2116 NPN transistor, supplied as a 74 KB PDF. Its name follows the Japanese JIS 2SD convention and carries nothing beyond the part number.

Specification sheet in PDF, around 82 KB, for the 2SD1781K NPN transistor of the JIS 2SD series; the K suffix denotes a specific version of the base part.

The 3SK304 is covered by this 25.9 KB PDF, listed as a schematic though it is expected to be a component datasheet.

The 3SK270 semiconductor is described in this 32.7 KB PDF, listed as a schematic although the content is expected to be a part datasheet.

An 80.6 KB PDF named after the 3SK265, filed under schematics but most likely a datasheet for that single device.

Reference PDF of 71.2 KB for the 2SD1981 transistor, catalogued as a schematic. Japanese JIS numbering assigns the 2SD prefix to NPN bipolar parts designed for…

Datasheet for the 2SD2387 in PDF form, 178 KB, catalogued under schematics. The JIS prefix 2SD denotes an NPN bipolar transistor of the low-frequency family.

Datasheet PDF of 45.2 KB for the 2SK3280, categorised here as a schematic. The 2SK prefix indicates an N-channel field-effect transistor according to JEITA naming.

PDF reference for the 2SK2993 transistor, 424 KB. The file name carries only the part number, which under the JIS scheme denotes an N-channel field-effect transistor, so…

Datasheet in PDF form for the 2SK2962, 385 KB in size and catalogued as a schematic. The 2SK series denotes N-channel FETs registered under the Japanese JIS scheme, so…

The 2SK2530 is covered by this 42.5 KB PDF document, catalogued under schematics. According to Japanese JIS numbering, 2SK marks an N-channel field-effect transistor…

Lowercase-named PDF of 136 KB covering the 2SK2503, catalogued as a schematic though it relates to a single transistor.

A 134 KB PDF identified solely as 2SK2219, placed in the schematic category but most likely a transistor datasheet.

Covering the 2SK1828, this 319 KB PDF is catalogued as a schematic but is most likely the component datasheet.

2SK1423 component data in a 105 KB PDF, entered in the index as a schematic. Japanese JIS naming uses the 2SK prefix for N-channel FETs, but the name gives no maker…

Here the 2SK1422 transistor is documented in a 103 KB PDF filed under schematics, though content is most likely a datasheet rather than a board diagram.

The 2SJ619 is the subject of this 314 KB PDF, indexed as a schematic though the naming suggests a component datasheet.

The 2SJ609 is documented in this 30.0 KB PDF, listed under schematics but named in the manner of a component datasheet.

PDF of 56.2 KB named 2SD1391, a JIS designation for an NPN low-frequency bipolar transistor, and presumably its datasheet although indexed under schematics.

Listed under schematics, this 110 KB PDF is named for the 2SD1347, an NPN bipolar transistor in the Japanese JIS 2SD series, and is probably its datasheet.

Datasheet-type PDF of 47.9 KB for the 2SD894, placed under schematics. The name holds only the part number, which follows JIS conventions where 2SD indicates an NPN…

For the 2SD893, this 53.8 KB PDF includes an _E suffix in its name whose meaning is not given.

The 2SC4527 data sheet, a 310 KB PDF filed under schematics but in practice a component specification.

Reference sheet for transistor 2SC4474, supplied as a 109 KB PDF and listed among schematics.

For the 2SC5107 transistor, this 242 KB PDF is categorised as a schematic, though the bare part-number name points to a datasheet.

PDF reference for the 2SC4248 transistor, 300 KB in size. Beyond the part number the file name gives no information about manufacturer, package or revision.

Sized at 316 KB, this PDF covers the 2SC5422, a part number in the Japanese JIS series used for NPN bipolar transistors.

A 79.7 KB PDF for the 2SC3950 transistor, placed in the schematic category though the part-number name indicates a component datasheet.

A 40.9 KB PDF titled 2SC3937 with the _E suffix often used for English versions of Japanese datasheets, listed here under schematics.