Generic troubleshooting PDF of 1.39 MB whose name gives no brand, model or board, so the device it covers must be checked inside the document.

Schematics archive for a device labelled A300, packed as a 1.14 MB RAR without a brand in the name.

Lenovo B490 schematic in PDF format, 1.95 MB, apparently a duplicate copy of another B490 file judging by the identical name and size.

PDF schematic for the Samsung SM-G930F, sized at 3.71 MB. No board revision or additional variant information appears in the name.

Schematic diagram in PDF for the Lenovo ThinkPad T420s, roughly 1.16 MB. The name gives no board number or revision, so confirm the motherboard version against the…

Service schematic for the Nokia N79 slider phone, supplied as a 6.39 MB PDF document. The pages are useful for following power distribution from the battery and power…

Schematic for an IBM-branded X201i, judging by the file name, supplied as a 1.62 MB PDF with no board number or revision given.

PDF schematic for the IBM ThinkPad R31, around 1022 KB. No board number, revision or hardware variant appears in the name, so identification rests on the model alone.

Schematic for the Sony PCG-GRS175 notebook, provided as a 645 KB PDF; the name carries no board number, ODM code or revision.

Schematic for the Quanta AT5 laptop mainboard at revision R1A, supplied as a 1.22 MB PDF.

Schematic for the Lenovo V330 and V530 laptops, EX3 project, discrete graphics version with AMD R17M GPU, covering Compal boards LA-D562P and LA-F481P at revision 0.2.

Motherboard schematic for the Acer Aspire A315 series made by Huaqin, project NB8609 with the Rose GL board name, revision C2 and a date stamp of 28 March 2019.

Circuit diagram of the Toshiba PA-1750-09 power adapter, built around an LTA601N controller, noted in the name as a TEA1751T equivalent; the Russian phrase means on the…

PDF schematic for the SM7635 processor, as the name indicates, without any handset or board number given. At 1.97 MB it is readable in any standard PDF viewer.

A 169 KB PDF for the 2SD1803, placed in the schematic category but evidently a component reference sheet. No manufacturer, revision or variant is named.

PDF sheet of 38.4 KB for the 2SD2575, with an _E suffix in the file name. Filed as a schematic, it most likely holds datasheet content, because 2SD is the JIS code for…

Datasheet-type PDF of roughly 41.9 KB for the 5LN02SP, placed in the schematic category.

Component documentation for 5HP02M, delivered as a 40.7 KB PDF. Despite the schematic label, the name is a bare part number with no board or brand information, so treat…

Optocoupler datasheet for the 4N29, with the name indicating revision 4x, supplied as a PDF of roughly 287 KB.

The 3SK219 is covered by this compact PDF of roughly 30 KB, indexed as a schematic but by its name a part datasheet.

A 91.5 KB PDF titled with the JIS part number 2SD1886, which suggests a component datasheet even though the index tags it as a schematic.

Only 28.2 KB, this PDF named 2sk123 is catalogued as a schematic, but the name is a JIS transistor number, so a short datasheet is the likely content.

PDF of 426 KB named for the 2SK2842 part number and filed in the schematic category. Because the 2SK prefix denotes an N-channel field-effect transistor in JIS…

A 418 KB PDF named for the 2SK2742, an N-channel field-effect transistor under the Japanese JIS 2SK prefix, placed in the schematic category.

A 407 KB PDF for the 2SK2602, a part number following the Japanese JIS convention in which 2SK designates an N-channel field-effect transistor.

The 2SK1442 is the sole detail in the name of this 107 KB PDF, which is categorised as a schematic.

Covering the 2SK443, this 95.2 KB PDF sits under schematics, though the JIS 2SK naming for N-channel field-effect transistors indicates a component datasheet.

Under the JIS semiconductor scheme the name 2SJ464 refers to a P-channel FET, and this 320 KB PDF, although indexed as a schematic, should be its datasheet.

The 2SJ344 is covered by this 310 KB PDF, which the catalogue lists under schematics. The file name carries nothing beyond the part number.

A compact 27.8 KB PDF named after 2SJ164, a JIS designation identifying a P-channel FET.

Datasheet PDF for the 2SD1222, sized 183 KB and placed in the schematic section of the index.

Datasheet for the 2SD814 NPN transistor, a 42 KB PDF whose _E suffix probably indicates an English edition.

The 2SC4688 transistor is documented in this 178 KB PDF, which the catalogue files under schematics.

PDF document for the 2SC4435, catalogued as a schematic but named after a discrete semiconductor part number rather than a board.

Datasheet-type PDF of about 90.7 KB for the 2SC4413. No board, brand or revision appears in the name; the JIS 2SC prefix simply indicates an NPN bipolar transistor.

A 187 KB PDF named after the 2SC4408 part number and listed in the schematic category. JIS numbering uses 2SC for NPN bipolar transistors, so treat the file as a…

Reference sheet in PDF format for the 2SC4256, 80.8 KB in size. The file name gives no manufacturer, package or revision details.

PDF sheet for the 2SC3935 part, with an _E suffix after the number, filed under schematics at 40.7 KB.

A 468 KB PDF covering the 2SC3607 transistor, filed in the schematic category but best treated as a manufacturer datasheet.

For the 2SC3597 transistor, a 119 KB PDF filed as a schematic but containing component data.