The 2SB1557 PNP transistor datasheet, a 184 KB PDF catalogued as a schematic. By JIS convention the 2SB prefix identifies PNP bipolar transistors for low-frequency use…

PDF datasheet for the 2SB1288, 41.4 KB, with an E suffix in the name that most likely marks an English-language edition.

A 55.0 KB PDF titled with the 2SA1531 part number and an _E suffix, catalogued as a schematic yet most plausibly the datasheet for that transistor.

PDF for the 2SA1512, 41.0 KB, with an _E suffix in the name whose meaning is not stated, possibly a document edition or language variant.

Datasheet PDF of only 13.5 KB for the 2SA684 transistor, marked UTC, which indicates the Unisonic Technologies edition of this part.

A compact 50 KB PDF named after the JEDEC-registered part 2N720A, indexed under schematics but almost certainly a component datasheet rather than a board drawing.

Catalogued among schematics, this 254 KB PDF is titled with the JEDEC part number 2N5630 plus an RE suffix of uncertain meaning.

At 130 KB, this PDF is named for the semiconductor 1SS376; no board, model or brand appears in the name.

Part number 1SS362 is all the file name reveals; the 69.1 KB PDF should be the specification sheet for this small-signal silicon diode, as the JIS 1SS prefix indicates…

This 67.6 KB PDF, sorted under schematics, identifies itself only as 1SS300, with no laptop or board stated.

At 136 KB, this PDF named 1SS295 is the largest in its group, yet the name still gives only a part number and no device or board.

Labelled as a schematic, this 138 KB PDF is named only 1N2054, which matches the JEDEC 1N numbering applied to diodes, so the content is likely a datasheet for that…

Only 34.2 KB, this PDF is named 1N957, a JEDEC 1N diode designation, and is better described as a component datasheet than a schematic.

A 127 KB PDF filed under schematics and named 20ETF08S. It gives no device model, board number or revision.

Schematic for the LA48 project, board 11264-1, with an extra 4TD01 code that likely identifies a build or revision.

Schematic in PDF for the Z8Y mainboard, with RAMP in the name likely marking a design stage, packaged as a 1.21 MB RAR.

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

PDF schematic of about 979 KB carrying only the code KL2D, with no brand, model or board number given.

First part of a multi-file schematic set for the TV model TH32A410H, a 6.62 MB PDF numbered -1.

Schematic or service documentation for a television model coded KLV46V510A, a 13.9 MB PDF; the name gives no chassis or board revision.

Schematic PDF of 6.11 MB for Compal boards LA-H482P and LA-H492P, as stated in the name, which gives no laptop brand or model.

OPPO R1K smartphone schematics, packed in a 932 KB rar file. These diagrams show how the power management chip, battery connector, charging circuit, display and…

Acer Aspire 7520 circuit diagram in PDF, tied to mainboard LA-3581P. The LA- prefix with a trailing P follows Compal's numbering, so Compal is the ODM behind this board…

Wistron LA480 schematic, revision RSD, distributed in a 1.85 MB RAR archive. The name does not specify which laptop brand used this board, so identify it by the LA480…

Logic block diagram for the Xiaomi Redmi 3A, with a Chinese title, supplied as a 738 KB PDF.

Compal LA-1181 schematic, revision R2.0, supplied as a 770 KB RAR archive. It documents an early Compal laptop motherboard, showing how its power rails, regulators and…

HP EliteBook 2560p circuit diagram, Styx MV build dated 2011-04-15, with the number 1310A2400201 shown in the name.

Compal schematic for board LA-8868P in PDF form; the name does not list the laptop brand or model, so identify the machine by the board code printed on the PCB.

Third copy of the Quanta AT6 schematic, revision R1A, a 1.58 MB PDF that matches the other AT6 files in size.

Single PDF of 40.8 KB for the 2SD2216, listed as a schematic but most likely a component datasheet, since the name is a part number rather than a board.

Filed as a schematic, this 53 KB PDF is named after the 2SD1725 part number, so it is most likely a component datasheet rather than a board diagram.

A PDF of about 88 KB for the 2SK2154, filed under schematics but most likely a component datasheet, since the name is just the part number.

Reference sheet for the 2SC4627, a JIS-numbered NPN transistor, supplied as a 61 KB PDF.

Bearing only the part number 2SC4393, this 319 KB PDF is indexed as a schematic yet is most likely the transistor datasheet.

Datasheet PDF, 81.8 KB, for the 2SC3997 transistor, placed in the schematic listing. JIS numbering uses 2SC for NPN bipolar transistors; nothing else, such as maker or…

Filed under schematics, the 2SC3993 PDF (107 KB) is far more likely a component datasheet, since the name is simply a JIS transistor part number.

A 52.6 KB PDF for the 2SC3933, labelled with an _E suffix and catalogued as a schematic.

Data document for the 2sb1590k, a 34.8 KB PDF listed under schematics. The 2SB part follows JIS numbering for PNP low-frequency bipolar transistors; the trailing K is a…

Reference document for the 2SB1398 transistor, with an _E suffix in the name that is not explained and may indicate an edition or language version.

An 85.0 KB PDF covering the 2SA1965, whose 2SA prefix under JIS rules marks a PNP bipolar transistor.