Audio section of the Samsung SM-A11 schematic covering the microphones, loudspeaker and earpiece, as a PDF of 4.33 MB.

Ground resistance map for the iPhone 7 Plus RF power amplifier area, labelled LBDSM_RF in the Chinese title, supplied as a 7.31 MB PDF.

Datasheet for the AD7523 from Analog Devices, an 8-bit multiplying DAC with current outputs, provided as a 178 KB PDF.

PCB document for an R2 power amplifier listed at 1000 watts, as a 3.50 MB PDF. The larger size suggests detailed artwork, possibly with both layers or component…

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.

Simple preamplifier schematic built around the NE5532 dual low-noise op-amp, a 405 KB PDF; the extra tag in the name only marks the source site.

Archive for the Blaupunkt GTA 250 amplifier, part number 7607792037, packed as a 649 KB RAR file.

Word document of 497 KB, titled in Indonesian for a subwoofer circuit at 80 Hz. The file likely contains a filter or crossover design with a cutoff around 80 Hz for…

Analog Devices AD7541 datasheet, a 234 KB PDF for a 12-bit multiplying digital-to-analogue converter with parallel data inputs and current outputs.

Network or RF section from the Samsung Galaxy A30s (SM-A30S) schematic collection, as a 4.29 MB PDF file.

Audio page of the Samsung SM-A30S (Galaxy A30s) schematic, covering microphone, loudspeaker and earpiece circuits, saved as a 4.30 MB PDF.

Service manual PDF for the Audio Pro TA150 receiver, matching the rec and sm tags in the name.

PDF schematic named only Ramsés, with no device type, brand or board number given, so its contents can only be confirmed by opening it.

Audio Pro Ace Bass B4-200 subwoofer service manual, going by the AceBassB4_200, sub and sm tokens.

Small PDF schematic sheet titled gain booster bottom, apparently covering the bottom side or lower section of a gain booster circuit, likely a signal amplifier board.

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

Datasheet for the LM358, revision 7, a 133 KB PDF. The LM358 is a widely used dual operational amplifier found in power supplies, chargers, audio stages and control…

Sony LCD television schematic for the KDL-32V2000 with the 40 and 46 inch versions of the same series, on the WAX2 chassis, as a 13.6 MB PDF.

PCB artwork for the top side of an R2 class power amplifier rated around 500 watts into a 4 ohm load, saved as a 177 KB PDF.

ZIP archive of 7.03 MB named PA 6.0 CIRCUIT, apparently a set of circuit drawings for a unit called PA 6.0, possibly a public address amplifier, though no maker is…

Network and cellular RF section of the Samsung Galaxy A12 (SM-A12) schematic, 3.40 MB PDF.

Schematic PDF of 2.29 MB for a tone control circuit with low, mid and high adjustment plus a sub-woofer section, according to the name.

Service manual for the Audio Pro B1.35 MK2 subwoofer, read from the B1_35MK2, sub and sm tokens in the name.

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

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

Indexed as a schematic, the 124 KB PDF named 2SJ193 most probably holds the datasheet for that JIS-numbered P-channel FET.

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

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

Datasheet for the DAC0800, an 8-bit high-speed current-output digital-to-analog converter originally from National Semiconductor.

Schematic for a mosque mixer, the Indonesian name Mixer Masjid, model Master Box X6, provided as a 585 KB PDF despite the doubled extension in the original name.

A 199 KB PDF covering the AD7528, a dual 8-bit multiplying digital-to-analogue converter from Analog Devices with a shared data bus and a select line for each DAC.

This 93.0 KB PDF carries the part number 2SJ258 and nothing else. The 2SJ prefix, under Japanese JIS numbering, indicates a P-channel field-effect transistor, so expect…

Compact archive referring to the NE5558 / SA4558 family part numbering, most likely a datasheet for a 4558-type dual operational amplifier.

Here the 2SK1234 N-channel field-effect transistor is described in a 46.1 KB PDF. The 2SK code marks it as an N-channel device under the Japanese JIS scheme, used in…

Studiomaster M1000 schematic, supplied as a 576 KB PDF. Studiomaster builds professional audio gear such as mixers and amplifiers, and a diagram like this is used to…

Datasheet for the MT8870, a widely used DTMF receiver that decodes telephone keypad tones into a 4-bit code with a strobe output.

The 2SK1375 N-channel field-effect transistor is covered by this 150 KB PDF, filed under schematics in the catalogue.

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 in PDF form for the IRFP250 N-channel power MOSFET, a compact 92.6 KB file. Expect absolute maximum ratings, on-resistance, gate charge, safe operating area…