Small 73.4 KB PDF for the Sony KD-43XH8005 television, referencing part number 1-002-850-31 and YS9S049HNG01, and labelled EMMC.

PDF amplifier circuit built around the Sanyo STK412-170 hybrid module, rated at 180 W in the name, which also marks it as OK, presumably a verified design.

PDF schematic of 45.2 KB for a Dynatech V5000 SMD preamplifier with display section, plus an inverter design attributed to Pappu.

Dynatech-style home inverter documentation covering the V4000, V5000 and V7000 models, describing the SMD control module and including its PCB layout.

Schematic for the Dynatech V4000 inverter, tagged Pappu and carrying the number 8720041200, which may be a contact or reference code rather than a board number.

Circuit diagram PDF for the Dynatech V-5000 and V7000 inverter models, with the same Pappu tag and 8720041200 reference found on the related V4000 sheet.

Schematic in PDF format for a bridged-tied-load subwoofer amplifier labelled 2050, where BTL means two amplifier halves drive the speaker in bridge mode for higher…

Scanned PDF of the September 2006 issue of AudioXpress, the audio electronics magazine, filed here under schematics.

Reference design document for an adjustable-output 200 W SEPIC power supply, a 3.26 MB PDF.

Very small PDF schematic named only 4kw2, probably a second sheet or variant of a 4 kW power amplifier design, though the name gives no further detail.

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

PDF schematic for an active subwoofer project designated PSW500, a 284 KB document credited to Rat Net, whose name describes it in Spanish as an active subwoofer.

Scanned book titled Programming Microprocessors by W. M. McMurran, dated 1977, provided as a 13.4 MB PDF.

Schematic for the PMA400 Lambda amplifier, a 400 W audio power amp design credited to Rat Net, supplied as a 477 KB PDF.

PDF schematic of a low pass filter built around the 5532 dual op-amp, intended to feed an audio power amplifier, 126 KB in size; the name suggests it was shared…

Service manual for the Lexicon MPX 200 effects processor, a 1.35 MB PDF. Service manuals of this kind usually combine schematics, board layouts, parts lists and test or…

Small 73.4 KB PDF for the Sony KD-43XH8005 television, referencing part number 1-002-850-31 and YS9S049HNG01, and labelled EMMC.

Updated schematic for the IRS D900 class D amplifier, rated from 200 to 500 W and credited to Rat Net, in a 423 KB PDF.

Generic file named index2, a very small 20.9 KB PDF catalogued as a schematic. The name reveals nothing about the device, brand or board, so open it and identify the…

PDF schematic of 45.2 KB for a Dynatech V5000 SMD preamplifier with display section, plus an inverter design attributed to Pappu.

Schematic PDF of 50.8 KB with a generic messaging-app style name that gives a date-like code but no model, brand or board detail.

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.

Zener mono power amplifier rated 500 W, documented in a 952 KB PDF. The name gives no revision or further details, so verify the content on opening, which may include…

PDF for a Zener 100 W mono amplifier with a quasi-complementary output stage, as indicated by the Spanish word cuasi, 569 KB in size.

Mirrored PCB artwork for a Zener amplifier board, a 237 KB PDF; espejo is Spanish for mirror.

Schematic PDF of 547 KB for a V4000 related inverter circuit credited to Pappu, likely a companion to the V5000 documents in the same set.

Document numbered UM10155, a 179 KB PDF. The UM prefix is used by NXP for user manuals, but the name does not reveal which product it describes, so open it to identify…

Spanish-language PDF for a Tonante stereo unit, labelled as a legend sheet for thermal transfer, meaning a component-side print layout meant to be ironed onto…

Schematic in PDF form for a stereo preamplifier with a loudness control, a common DIY audio circuit that boosts bass and treble at low listening volume.

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 PDF with a generic messaging-app export name built from a date stamp, 13 April 2023, and a sequence number.

Dynatech-style home inverter documentation covering the V4000, V5000 and V7000 models, describing the SMD control module and including its PCB layout.

Schematic for the Dynatech V4000 inverter, tagged Pappu and carrying the number 8720041200, which may be a contact or reference code rather than a board number.

Circuit diagram PDF for the Dynatech V-5000 and V7000 inverter models, with the same Pappu tag and 8720041200 reference found on the related V4000 sheet.

Cross-reference sheet listing equivalents for diodes, bridge rectifiers and transistors, originally prepared as an Excel table and saved to PDF, despite being filed here…

Small 26.2 KB PDF, filed as a datasheet, holding a schematic of a Class D amplifier rated around 200 W RMS that uses two MOSFETs in its output stage.

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.

Service schematic for the Bose AM15P, as named in the file, likely an amplifier or powered bass module from an Acoustimass-type speaker system.

PDF bundle of Bose schematics, 1.53 MB in size, whose name lists no particular model, so the covered products must be confirmed by opening it.

Power-section schematic, going by the pwr-sch suffix, for equipment identified only as BFI, an abbreviation the name does not explain.