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.

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.

Only the part number 2SJ275 appears in the name of this 97.0 KB PDF. That code follows Japanese JIS numbering, where 2SJ indicates a P-channel field-effect transistor…

Named after the JIS part number 2SJ267, this 91.8 KB PDF most likely documents a P-channel field-effect transistor, since the 2SJ prefix denotes that device class.

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…

PDF schematic covering the microphone, loudspeaker and earpiece circuits of a handset, from a sectioned series of roughly 4.78 MB pages without a model in the name.

Audio Pro Ace Bass B2-40 subwoofer service manual in PDF form, about 1.96 MB, as indicated by the sub and sm tags.

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

Datasheet PDF for the KIA324P with an additional F suffix in the name, 321 KB, filed under schematics.

Datasheet for the TIP41C NPN and TIP42C PNP complementary power transistors, a 195 KB PDF.

Matrix II amplifier document labelled t13 x73-1, provided as a 1.84 MB PDF; the tokens appear to be a variant or board identifier, though their exact meaning is not…

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

PDF schematic for a 2.1-channel power amplifier, meaning two satellite channels plus a subwoofer channel.

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.

Compact PDF datasheet for the MPSA06, an NPN general-purpose transistor rated in the file name at 80 V and 500 mA.

Reference PDF for the BD136, BD138 and BD140 transistor series, catalogued as a schematic but in practice a component datasheet of 51.2 KB.

Network section of the Samsung SM-A05 schematic, packed into a 6.27 MB PDF. It covers the radio part of the phone: transceiver, power amplifier, antenna switch, filters…

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.

Schematic in PDF form labelled safari std, a name that in DIY audio circles usually refers to a Safari power amplifier design, standard version, though the file name…

Top-side PCB print for an R2 amplifier rated 1500 watts into 2 ohms, with the Indonesian note langsung print meaning ready to print directly.

Schematic section for the LG G5 smartphone covering the network or RF part of the circuit, according to its title.

Version 1.0 service schematic for the Sony MEX-BT5100 car stereo with Bluetooth, delivered as a 6.42 MB PDF.

Service manual schematic from Sony for the MEX-BT2500 car audio receiver, version 1.0, in a 5.00 MB PDF; the sm tag points to a service manual.

Service schematic in PDF form for the Ahuja SSA 250, a model in the Ahuja range of public address amplifiers, size 929 KB.

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

Archive for the Apple audio board 820-2136, a 137 KB RAR file covering the daughterboard that handles audio connections.

PDF of 1.01 MB for the LM101A-N, a general-purpose operational amplifier, catalogued under schematics.

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