A short PDF of 170 KB titled ME region, catalogued as a schematic but most likely a reference or guide about the Intel Management Engine section of the SPI flash, since…

Small Spanish PDF, 62.9 KB, numbered 121 in what looks like a circuit series, showing load switching with a relay driven by a transistor.

Spanish-language guide on analysing logic boards that are in short circuit, credited to Daniel Escalante in the file name.

Spanish PDF titled Microelectrónica, 4.14 MB, with no device, brand or board named. It is likely training or course material covering microelectronics topics such as…

PDF data for the 2SD2658LS, 31.1 KB, indexed under schematics. The LS ending is part of the type designation and points to a specific variant or package of the 2SD2658…

Spanish basic electronics guide, a general introduction rather than a schematic for any specific equipment. The name gives no device or board number.

Product specification section of the Samsung SM-M307F service documentation (Galaxy M30s), a 2.90 MB PDF.

PDF reference for the 2SK1332 N-channel transistor, 103 KB, catalogued with schematics though it describes a single semiconductor rather than a circuit board.

Samsung documentation for the LTM240M1-L01 LCD panel, a small 619 KB PDF, most likely the panel specification sheet rather than a device schematic.

Specification sheet in PDF, around 82 KB, for the 2SD1781K NPN transistor of the JIS 2SD series; the K suffix denotes a specific version of the base part.

Complete-looking datasheet PDF of 675 KB named 25C02, catalogued as a schematic. By standard naming it covers a 2 Kbit SPI serial EEPROM, without any manufacturer…

Short 44 KB PDF covering the 4N32 and 4N33 optocouplers, two closely related members of the 4N family that use a Darlington phototransistor output for high current…

Brief 13.0 KB PDF datasheet for the 2SA1012 from UTC, that is Unisonic Technologies, which manufactures this transistor number among others.

Spanish-language schematic for a stereo amplifier titled Zener, rated at 1000 W, in a 1.15 MB PDF.

Family datasheet spanning the 4N29 through 4N33 optocouplers, a 157 KB PDF listed in the schematic category.

Brief 32.2 KB PDF for the 2SK1458LS, identified by its Japanese 2SK code as an N-channel field-effect transistor, with an LS suffix marking a specific variant.

Datasheet-type PDF of 197 KB for the 2SA2069 transistor, indexed under schematics. Following JIS naming, the 2SA prefix identifies a PNP transistor intended for…

Specification sheet for the 1N4942G diode in a 157 KB PDF, categorised as a schematic. The G suffix is a vendor variant designation, commonly glass passivated, so the…

PDF of 129 KB titled 27C16, filed as a schematic but corresponding to an early member of the 27C EPROM family by its part number.

Fourth chapter of a Spanish cellular-phone course, dealing with cloning or unlocking, saved as an 863 KB PDF.

Topic 2 of a Spanish smartphone repair course, covering basic electronics, as an 817 KB PDF that appears to duplicate the unnumbered copy. No device or board is named.

Part document for the 2sk2575, 35.2 KB in PDF format and catalogued as a schematic. The 2SK prefix in JIS nomenclature marks an N-channel field-effect transistor; the…

Fairly large datasheet PDF of 705 KB named 25C16, catalogued as a schematic. The name follows the 25-series serial EEPROM convention, indicating a 16 Kbit SPI device…

Spanish document about the diode, a 373 KB PDF of component theory rather than a schematic for a specific device. The name gives no product or board number.

Notebook schematic for the Quanta Y0K project, revision 1A, with 192016 in the name likely being a date code. The 1.25 MB PDF gives no brand or chipset information.

Reference for the Atmel AT45DB041B, a 4-megabit serial DataFlash memory as the name states, in a 233 KB PDF.

Small 54.1 KB PDF titled with the 200HF code, which refers to a power diode or rectifier series rather than a specific board or device.

Named simply 50SQ, the 132 KB PDF in the schematic category covers what looks like a component family rather than a specific device; no brand, model or board is given.

PDF of 67.9 KB filed as a schematic and named 28C64A, an A revision code within the 28C64 parallel EEPROM family.

Filed as a schematic, this 161 KB PDF titled 27lc010 is almost certainly a component datasheet rather than a board diagram.

Labelled 27c4096, this 111 KB PDF sits in the schematic section but the name is a part number from the 27C CMOS EPROM series.

Spanish-language PDF from a master course in microelectronics, apparently part one of a series, about 904 KB.

Electronics-for-beginners guide in Spanish, a 5.77 MB PDF filed under schematics but by its title an educational text rather than a device diagram.

Training course material on basic electronics repair, 7.26 MB PDF, catalogued with schematics although it is an educational guide rather than a board diagram.

A schematic-category PDF of 129 KB whose name, 50WQ04FN, identifies no device, board number or revision.

Learn Arduino, a Spanish guide in a 5.69 MB PDF focused on the Arduino microcontroller platform rather than repair of a specific device.

PDF schematic of the HT-S40R home theatre system, about 1.50 MB, the name carries no board number or revision.

Spanish tutorial PDF on how to read a schematic, credited to ABCtecnologyspro. It is a training document rather than a diagram for a specific device, and it likely…

Issue 17 of El mundo de la electronica, a Spanish electronics course or magazine series supplied as a 1.31 MB PDF.

Part datasheet for 5HP01SP, a 27.5 KB PDF. The name carries no model, brand or board number, only the device code with an SP suffix that likely identifies its package.