Laptop schematic identified only by the number 4520, with no brand, board number or revision stated in the name, so the exact model cannot be confirmed from the title…

Reference PDF for the HCF4050B, a non-inverting hex buffer from the CMOS 4000 family, as the file name itself states.

PDF reference, 218 KB, for the LA7286, an IC from the LA series, a prefix associated with Sanyo linear integrated circuits.

Part datasheet in PDF for the MJE13007F, a high-voltage NPN switching transistor. The F suffix usually denotes an isolated fully plastic package, though the name states…

Datasheet PDF for the BD234, only 49.2 KB and indexed as a schematic. The BD234 is a medium-power PNP transistor in a plastic package, commonly paired with a…

Filed as a schematic, the 28.3 KB PDF 3LN02SP is named after what appears to be a discrete component code, here from the LN series with an SP suffix.

PDF of 41.6 KB, catalogued as a schematic and named 3LN02M, which looks like a semiconductor part number with an M suffix rather than a board code.

A 30.6 KB PDF labelled with the JIS part number 2SK3488 and filed in the schematic category, though the content should be a component datasheet.

A 230 KB PDF for the 2SK2911, filed as a schematic although the bare part number suggests a manufacturer datasheet.

The 2SK2884 is the subject of this 428 KB PDF, indexed as a schematic though it is most likely the manufacturer datasheet for the part.

A very small PDF of 23.8 KB named for the 2SK2797, filed under schematics. The 2SK prefix follows the JIS naming convention for N-channel field-effect transistors, so…

A 116 KB PDF for the 2SK2731 bearing a 1-5 suffix that the name does not explain, perhaps an edition marker.

Compact 23.1 KB PDF named only with the part number 2SK2277. Because 2SK is the JIS prefix for N-channel FETs, the schematic category here most likely holds a short…

Datasheet-style PDF for the 2SK1734, filed in the index under schematics though the name points to a single discrete part.

Indexed as a schematic, this 112 KB PDF carries just the name 2SK1454, a JIS-style code for an N-channel field-effect transistor.

This 170 KB PDF carries the part number 2SJ502 and is indexed under schematics. In JIS naming, 2SJ marks a P-channel FET, so the document is expected to be the datasheet…

A 105 KB PDF for the 2SJ421, catalogued as a schematic but in practice a component datasheet, since the 2SJ prefix in the Japanese JIS numbering system marks a P-channel…

Part documentation for the 2SD1196 in a 139 KB PDF, placed in the schematic category but evidently a component datasheet given its name.

At 214 KB, this PDF named 2SC4118 is filed as a schematic but is most plausibly a fuller datasheet for that part, likely with characteristic curves.

Short 125 KB PDF on the 2SC5086FT, the FT-suffixed variant of the 2SC5086 NPN transistor; the name does not say what the suffix means, though such suffixes usually mark…

The 2SC4030 transistor is documented in this 119 KB PDF, which is listed in the schematic section.

Small PDF of 47.2 KB titled only with the part number 2SC5414, filed under schematics although the name points to a component document.

Small 84.1 KB PDF whose name, 2SC3792, is a bare transistor designation; it sits in the schematic category, yet the Japanese 2SC prefix points to an NPN bipolar device…

An 82 KB PDF for the 2SC3784, part of the JIS 2SC family of NPN transistors. It is listed as a schematic, but the file name points to a single component, so it is most…

A 40.9 KB PDF for the 2SC5303, a JIS-registered NPN transistor, catalogued here as a schematic although it reads as a part datasheet.

Reference sheet for the 2SC5363 transistor, delivered as a compact 40.7 KB PDF and listed among schematics.

Specification sheet for the 2SC3600 transistor in PDF form, 136 KB, listed under schematics.

2SC3598 datasheet in a 119 KB PDF, catalogued in the schematic group. Only the part number appears in the name; under Japanese JIS numbering the 2SC prefix identifies an…

Here the PDF, about 110 KB, is labelled with the bare part number 2SC3459 and listed as a schematic.

A 45.3 KB PDF titled with the JIS transistor number 2SC2909, filed under the schematic category.

A 51.5 KB PDF named for the 2SC1573 with an _E suffix, categorised as a schematic. Since 2SC is the JIS prefix for NPN bipolar transistors, this is best read as a short…

Listed among schematics, this 60.7 KB PDF refers to the 2SC1047, which under JIS numbering is an NPN bipolar transistor; the content is therefore most likely a part…

A compact 19.1 KB PDF for the 2SA1580, small enough that it is probably a one- or two-page summary sheet. No other details are present in the name.

A 39.8 KB PDF filed under schematics that covers the 2SB835 transistor, with an _E suffix in the name whose meaning is not stated and may simply denote an edition or…

An 86 KB PDF covering the 2SA1896, a PNP bipolar transistor under the Japanese JIS 2SA designation.

Short 31.2 KB PDF for the 2SA1864, a PNP bipolar transistor in the Japanese JIS 2SA family.

Component datasheet in PDF form for the 2N5458, an N-channel junction FET usually found in TO-92 packages, catalogued here as a schematic-type document of about 130 KB.

Datasheet PDF of 204 KB for the 2N3771, a JEDEC 2N-series transistor, catalogued in the schematic section.

The part code 1SV229 is all this 69.4 KB schematic-category PDF carries in its name, apart from a trailing underscore. No equipment or board information is present.

Part number 1SS345 is the only information in this 58.3 KB PDF name, so no laptop, board or revision is identified.