Datasheet-style PDF covering the 2SD1199, catalogued under schematics, with an _E suffix in the name that the file does not explain.

A 58.1 KB PDF labelled as a schematic and named after the 2SC1215, an NPN transistor by Japanese JIS naming, so it should be the datasheet for that discrete part.

Another copy of the 2N5401 datasheet, a 49.2 KB PDF whose _3 suffix probably marks an alternate version or a third saved copy rather than a documented revision.

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

Network RF section of the Samsung SM-A10 schematic, a 2.25 MB PDF. It follows the cellular radio chain from transceiver through power amplifiers, antenna switch and…

Schematic in PDF format for the Ahuja DXA 1802, about 1.63 MB, belonging to the Ahuja range of public address amplifiers.

Schematic collection for the Studiomaster PA series in a 2.65 MB PDF, apparently covering several models in that range, although the individual model numbers are not…

Printed circuit board layout for the subwoofer 7294 project, revision 1.1, as a 72.5 KB PDF.

Assembly drawing for the subwoofer 7294 amplifier, version 1.1, provided as a 138 KB PDF; montaz is Polish for assembly.

PCB layout for a Matrix amplifier rated 125 watts, labelled Beta 2008, as a 266 KB PDF.

PDF schematic labelled BCi with the year 2012, most likely an amplifier design from the same family as other BCi drawings, though the name itself states no power rating…

Merged PDF of application circuits for the STK41XX series, the Sanyo thick-film hybrid power amplifier modules used in many audio systems and mini components.

Another copy of documentation for the 2SD1458 NPN transistor, stored as a 48.8 KB PDF under a lowercase file name.

The 2SC2982 is the only information this 147 KB PDF name provides; it is filed as a schematic.

Compact datasheet, 14.5 KB in PDF form, for the part numbered 2N2955 according to the file name.

Audio section of the Samsung SM-A20S schematic covering microphone, loudspeaker and earpiece circuits, a 4.63 MB PDF.

Samsung SM-A10 audio schematic covering microphone, speaker and earpiece, provided as a 2.25 MB PDF.

Schematic PDF for the JBL PartyBox 710 portable party speaker, delivered as a 13.5 MB RAR archive.

PDF schematic for the TV controller board TP.MS3663S.PB818, file size about 3.3 MB. The MS3663 part of the code points to the MStar SoC, and the TP.xxx.PBxxx naming is…

Top-side PCB print for a Matrix i4 amplifier rated 250 watts into 4 ohms, tagged langsung print, Indonesian for print directly.

PDF circuit diagram of a mono tone control stage built around two transistors, as the name indicates.

Small PDF document for the STK412-150, a Sanyo hybrid power amplifier module used in many home audio systems and mini hi-fi units.

Number 22 of the Spanish series El mundo de la electronica, a 942 KB PDF that teaches electronics rather than documenting one device.

Datasheet PDF, 312 KB, for the LM324 quad op amp, listed in the schematic category without a manufacturer in the name.

Datasheet-style PDF covering the TIP29 and TIP30 complementary power transistors, filed here under the schematic category.

Another reference for the IRF540 power MOSFET, provided as a 117 KB PDF and indexed as a schematic despite being named a datasheet.

Network and RF section schematic for the Samsung SM-A23, a 2.78 MB PDF from a series of per-function sheets.

Cellular network section schematic for the Samsung SM-A22 5G, a 5.26 MB PDF. It covers the RF chain, including transceiver, power amplifiers, antenna switches and the…

Audio section of the Samsung Galaxy A02s (SM-A02S) schematic in PDF, covering microphone, loudspeaker and earpiece circuits, at 1.79 MB, smaller than the other pages in…

PCB document named VDBL Multi, a 4.16 MB PDF that likely holds layouts for several board variants of a VDBL style amplifier design, as the multi tag suggests.

Bottom copper layer of the R2 power amplifier PCB rated 1500 watts at 2 ohms, marked langsung print, Indonesian for direct print.

Final PCB artwork for an amplifier using Sanken output transistors, labelled 7 set, which likely indicates seven pairs of output devices, delivered as a large 7.42 MB…

Schematic or layout for a PA-300 amplifier, possibly a 300 watt public address design, saved as version 1 in a 1022 KB PDF, with a timestamp suggesting an April 2023…

Updated release of the Matrix II t13 x73-1 amplifier document, marked new, in a 1.69 MB PDF.

Bottom copper artwork for the Matrix i4 amplifier board rated 250 watts at 4 ohms, labelled langsung print, meaning ready for direct printing.

PDF exported from a CorelDRAW file for a Zener stereo amplifier rated 400 W, 642 KB in size; the Spanish name says it comes without the circuit diagram.

Audio Pro Ace Bass A101 service manual, with the int tag suggesting an integrated amplifier, though the name does not state this firmly.

Service schematic for the Audio Pro A2, supplied as a 542 KB PDF; the int-sm suffix most likely marks an international service manual edition.

Large 24.8 MB PDF schematic for the MHC-V83D, a high-power home audio system model name used by Sony, though no brand is given in the file data.

Datasheet PDF, 64.6 KB, for the KA7500B, a PWM control IC from the KA7500 series and a TL494-style design widely found in computer power supplies.