Headset jack schematic page for the Samsung SM-A10, provided as a 1.22 MB PDF. It shows the jack detect line, stereo audio outputs, the headset microphone return and the…

Handsfree and headset audio schematic for the Samsung SM-A23, contained in a 2.78 MB PDF.

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.

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

Schematic section for the Samsung SM-A02S smartphone covering the handsfree audio circuit, supplied as a 1.79 MB PDF.

Schematic document in PDF format, about 1.80 MB, filed under the name TAS6534, which looks like a Texas Instruments part number from the TAS automotive class-D audio…

Audio schematic for the Samsung SM-A23 covering the microphone, loudspeaker and earpiece circuits, packed into a 2.79 MB PDF.

PDF document whose Persian title translates as datasheets of amplifier ICs, filed here as a schematic but in practice a reference collection for audio amplifier chips.

Handsfree section schematic for the Samsung SM-A22 5G (Galaxy A22 5G), supplied as a 2.58 MB PDF.

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…

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

2.1 amplifier schematic built around the TDA7294, by Technical Mriganka, in a 219 KB PDF.

Schematic for the Xiaomi Mi 4 LTE smartphone, a 1.32 MB PDF. It documents the circuit connections used when diagnosing power, charging, audio, display or radio problems…

PDF datasheet covering the 2SD2251 NPN transistor, 95.7 KB in size and listed under the schematic category. The name contains nothing beyond the part number.

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

Schematic PDF for the LG 32LG30 LCD television, 3.04 MB. The name gives the model only, without chassis or board number.

Schematic PDF for the Samsung SM-E700H, the Galaxy E7 dual-SIM model. At 12.8 MB it likely contains detailed circuit pages for power management, charging, display…

BA1404 reference PDF, 140 KB, for the ROHM FM stereo transmitter IC often used in small hobby and consumer FM transmitter circuits.

Datasheet for the 2SD2131 transistor, provided as a 240 KB PDF in the schematic section.

PDF sheet, 41.6 KB, on the 2SB1319 transistor, indexed as a schematic. The E suffix in the name likely refers to an English edition but is not explained.

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…

Troubleshooting guide in PDF for the Samsung SM-A105FN (Galaxy A10), where Tshoo is read as troubleshooting and 7 likely marks a service manual chapter.

Tone control circuit intended for a 2.1 channel audio system, in a 159 KB PDF. It shows the bass and treble adjustment network that sits between the source or preamp and…

Speaker protection circuit for a 2.1 audio setup, a user-drawn design in a 139 KB PDF. Such boards normally delay relay engagement at power-up to stop thumps and…

Nokia 6200 schematic diagrams provided as a 946 KB PDF. Only the model name is given, with no board code or revision, so compare the PCB markings against the sheets.

CD4066 reference document, a 174 KB PDF for the CMOS quad bilateral analog switch. Listed as a schematic, though it is most likely the datasheet with pin diagram…

Datasheet PDF, 137 KB, for the 2SD1841, part of the Japanese 2SD range of NPN bipolar transistors, catalogued here under schematics.

English-language datasheet, as the _E suffix suggests, for the 2SD2260 NPN bipolar transistor, supplied as a 45.3 KB PDF in the schematic section.

Part documentation for the 2SD1876 in PDF form, 89.6 KB, categorised under schematics. Only the part number is given in the name.

A 94.8 KB PDF documenting the 2SD895, indexed as a schematic though the name names a single transistor.

The 2SB1457 is covered by this 192 KB PDF, the largest of the group, filed as a schematic but named like a standard component datasheet.

Compact 39.7 KB PDF on the 2SB1370, indexed as a schematic though it documents one discrete device.

Technical Mriganka 2.1 amplifier design using the TDA7379 and TDA7377 power amplifier ICs, a 206 KB PDF.

Service schematic in PDF form for the Samsung SM-E500H, the Galaxy E5 smartphone, 7.24 MB.

Full schematic for the Apple iPhone X in PDF format, 14.3 MB. It covers the logic board circuitry including power management, charging, baseband, NAND, display, camera…

Circuit schematic for the classic Nokia 6210 handset, saved as a 779 KB PDF document. For older phones like this, diagrams are especially useful because replacement…

Schematic for the Nokia 6280 slider phone, provided as a 987 KB PDF file. The pages let a technician follow supply voltages out of the power management chip, check the…

The 2SK657 datasheet, filed as a schematic, is a 35.7 KB PDF; the 2SK prefix identifies an N-channel FET in the Japanese semiconductor numbering scheme.