2.1 amplifier schematic using the 2SC5200 and 2SA1943 complementary power transistor pair, in a 184 KB PDF.

PDF document named TDA2824, a designation used for a dual low-voltage audio power amplifier IC.

The 2SD2129 transistor is documented in this 216 KB PDF datasheet, catalogued among schematics.

The 2SC5421 transistor is the subject of this 323 KB PDF, likely a datasheet since 2SC stands for a JIS-registered NPN bipolar device.

Modified 2.1 channel amplifier schematic, a 90.6 KB PDF; the title does not say which original design was altered or which ICs are used.

Document for the 2SD2536 transistor, a 71.6 KB PDF in the schematic category that is most likely its datasheet.

Datasheet PDF for the IRFP240, a 60.1 KB document. The IRFP240 is an N-channel power MOSFET in a TO-247 package, commonly found in power supplies, amplifiers and…

Datasheet for the DAC0808, an 8-bit multiplying digital-to-analog converter with current output, compatible with the MC1408 family.

Datasheet PDF of 64.4 KB for the HA17324, a quad operational amplifier from Hitachi following the familiar 324 layout.

Datasheet-type PDF for the 3SK271, around 32.7 KB, catalogued in the schematic category.

PDF schematic titled simply 4kw, most likely a high-power audio amplifier rated around 4 kilowatts.

Datasheet for the LM358A, a 4.09 MB PDF. The LM358 family are dual operational amplifiers, commonly found in power supplies, chargers, monitor boards and battery…

Compact 25.2 KB PDF named for the 3SK301, categorised as a schematic but most likely a part datasheet. Nothing besides the type number appears in the name.

Component PDF for the 3SK285, 22.2 KB, placed in the schematic section of the index. Only the part number is given.

A 111 KB PDF for the 2SK1453, placed among schematics, although the part-number naming points to a component data sheet.

Compact 42.7 KB PDF covering the 2SB1183 transistor. The JIS-style 2SB prefix identifies a PNP device designed mainly for low-frequency circuits, commonly found in power…

Datasheet material for the 2SB1037 transistor, delivered as a 122 KB PDF in the schematic category.

Compact 77.2 KB PDF covering the 2SB893 transistor. In JIS numbering the 2SB prefix identifies PNP transistors for low-frequency circuits, such as audio amplifiers and…

Component placement drawing for the Apex AX 20 amplifier board, a 61 KB PDF. It shows where each resistor, capacitor, transistor and connector sits on the PCB, which…

An 88.0 KB PDF for the 2SD1838, a Japanese-registered NPN bipolar transistor, best treated as a datasheet even though it is indexed as a schematic.

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

PDF datasheet for the 2SD879 transistor, roughly 106 KB, with no manufacturer indicated in the file name.

Datasheet PDF, about 180 KB, for the 2SB1481, filed in the schematic section of the index under its bare JIS part number.

Datasheet for the SG2524, a 107 KB PDF covering a member of the long-established 2524/3524 family of regulating pulse-width modulators.

Mirrored PCB artwork for a Zener amplifier board, a 237 KB PDF; espejo is Spanish for mirror.

Audio Pro A101 service documentation in PDF form, about 3 MB, with the int-sm tag pointing to an international service manual version.

Sony schematic for the MEX-BT5000 car stereo with Bluetooth, provided as a 6.75 MB PDF with no version indicated.

PDF documentation, 32.7 KB, for the 3SK269, indexed under schematics. The JIS code 3SK marks an N-channel field-effect transistor with four terminals, generally a…

Datasheet PDF, roughly 82.3 KB, for the 2SK222, catalogued among schematics. The JIS 2SK series denotes N-channel field-effect transistors, and the name supplies no…

Component sheet for the 2SC4615 NPN transistor, around 154 KB in PDF format and filed as a schematic.

The file name gives nothing beyond 2SC3460, a Japanese JIS designation in which the 2SC prefix denotes an NPN bipolar transistor.

Compact 41.4 KB PDF for the 2SB987, with an _E suffix not explained by the name, perhaps an edition or language marker.

Covering the 2SA1837, this 173 KB PDF is listed as a schematic but is expected to be a transistor datasheet.

Datasheet for the 2SK1058 transistor from Hitachi Semiconductor, a small PDF of about 40 KB.

Scanned PDF of the September 2006 issue of AudioXpress, the audio electronics magazine, filed here under schematics.

Copper-side PCB artwork for the Apex AX 20 amplifier project, a 208 KB PDF showing the track pattern rather than a circuit diagram.

Spanish-language schematic for a stereo amplifier titled Zener, rated at 1000 W, in a 1.15 MB PDF.

Class H power supply schematic, version 0.2, fuse type, marked final, in a 1.39 MB PDF.

Schematic documentation for the HT-S100F soundbar, in PDF format of around 8.40 MB, a model designation used by Sony, though the name gives no revision.

Named for the 2SD1618 transistor, a 116 KB PDF listed as a schematic but most plausibly the part's datasheet.