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

Documentation for the Apple iMac A1150 M9 LIO audio board at PVT stage, drawing number 051-7066, packed into a 410 KB RAR.

BIOS package for the HP Pavilion 11-N107TU, Compal platform APT16, board LA-C121P revision 1.0, with a date stamp of 2014-11-03 in the name.

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.

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.

BIOS for the Haier i1500SM laptop, listed under Clevo, on main board EM-CM525 version 2.0, sized for a 16MB flash chip.

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

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

Preamplifier schematic, the file name being the Romanian word for preamp, delivered as a 574 KB PDF with no model or brand stated.

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.

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…

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.

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.

BIOS package for the HP 15-d series on the OSAMU2_CR_HPC MV_MB_V1 mainboard, part number 010194G00-35K-G.

The 2SD2285 is documented in this 128 KB PDF. Its JIS part number, with the 2SD prefix, places it among NPN transistors intended for low-frequency circuits such as…

The name of this 97.3 KB PDF gives nothing beyond 2SJ277, a JIS-style designation in which 2SJ marks a P-channel FET.

Network section schematic for the Samsung SM-A21s, a smaller 1.93 MB PDF. It covers the cellular radio part of the board, typically the RF transceiver, power amplifiers…

Circuit diagram for a bass extender project, with the name pointing to EPE, which typically refers to Everyday Practical Electronics magazine, and the May 2007 issue.

Service documentation for the Audio Pro Ace Bass B1-45 subwoofer, going by the sub and sm tags.

PDF schematic of a 150 W amplifier, marked as a new version and converted from another file format, judging by the name.

LED TV firmware for the Toshiba 32P2305ZE, a 4.00 MB image. The name identifies the Realtek RTD2648 PRO main controller and a TI TPA3110 class-D audio amplifier on the…

Schematic PDF from Sony for the MEX-GS610BE, MEX-GS610BT and MEX-N6050BT car receivers, marked version 1.0 and around 8.47 MB.

Repair guide archive for the Oppo A9 2020 covering no network or weak signal faults, 352 KB in RAR format.

BIOS dump for the Acer Predator Triton 300 PT315-51, codename FH58F, built on Compal board LA-J251P revision 1.0, intended for a 16MB SPI chip and packed as RAR.

Network section of a smartphone schematic in PDF, part of a sectioned set of around 4.78 MB per page; the device model is not given in the name.

Audio schematic for Apple board 820-2364, also numbered 051-7615 with code 14000, compressed into a 146 KB RAR.

Data sheet covering the BC548B NPN transistor, where the B suffix denotes a specific gain group, stored as a 32.8 KB PDF.

Network (cellular RF) portion of the Samsung SM-A20S schematic in PDF form, 4.63 MB. The pages cover the radio front end, power amplifiers, antenna switches and the…

Samsung SM-A05 audio schematic page showing the microphone, loudspeaker and earpiece circuits, 6.27 MB PDF.

Schematic in PDF form for a BCi 450 W amplifier, marked 2R and dated 2013 according to the file name.

Second part of the service manual for the Audio Pro A4-14 speaker, going by the spk and sm2 tokens.

First part of the service manual for the Audio Pro A4-14 speaker, a 6.15 MB PDF identified by the spk and sm1 tokens and paired with a second volume.

Sony schematic in PDF format for the HCD-SHAKE7, the main unit of a Shake series hi-fi audio system, document version 1.2 and roughly 6.03 MB.

First volume of the amdtest multi-part RAR archive, 1.76 GB, and the one to open when extracting the whole set.

Sheet for the TIP31 NPN and TIP32 PNP complementary power transistor pair, with the name stating 100 V and 3 A ratings; the PDF is 198 KB and listed under schematics.

Datasheet in PDF for the PZT2907A, a PNP small-signal transistor the file name rates at 60 V.