Service notice, 118 KB PDF, dated or numbered 17_02, telling technicians to remove the camera protection tape when replacing a camera module.

Spanish PDF guide on using a soldering iron (cautín), 495 KB, with no device or model involved. It is training material for basic hand soldering rather than a schematic.

Portuguese PDF, 88.3 KB, on using a bench power supply (fonte de bancada), apparently converted from another document format. No device or model is referenced.

PDF document filed under schematics, titled only as unit two in Spanish (unidad 2), which suggests a chapter of a repair or electronics course rather than a board…

Portuguese-language PDF listing complete equivalences for SMD transistors, a cross-reference for identifying surface-mount parts by their marking code and finding…

English PDF on testing electronic components, filed under schematics but in practice a general reference rather than a circuit diagram for a particular board.

Spanish PDF titled as a course topic with the abbreviation A.I., whose meaning is not clear from the name alone, so the content should be checked by opening it.

Spanish training PDF on identifying the parts of a smartphone, describing the main components and modules found inside a typical handset.

Spanish-language course chapter on basic electronics, provided as an 817 KB PDF and apparently the same content as the numbered topic 2 of the series.

Spanish PDF course topic about diagnosing and fixing software faults on mobile devices, 541 KB in size and seemingly identical to topic 7 in the same series.

Topic 8 of a Spanish mobile repair course, covering backup, root and recovery on smartphones, supplied as a 306 KB PDF. No specific device is named.

Spanish course chapter numbered topic 7, dealing with diagnosis and repair of software faults in mobile phones; the 541 KB PDF matches the unnumbered copy of the same…

Topic 6 of a Spanish smartphone repair course, focused on diagnosing and solving hardware faults, in a 308 KB PDF. No model or board number is stated.

Spanish PDF numbered topic 5 on disassembling mobile terminals, roughly 954 KB, part of a phone repair training series. It does not name a specific handset.

Topic 4 of a Spanish mobile repair course, explaining how to identify the parts of a smartphone, as a 404 KB PDF identical in size to the unnumbered copy.

Spanish course section 3.6 about the professional soldering station, part of a chapter on workshop equipment, in a 320 KB PDF. No specific product model is named.

Section 3.5 of a Spanish repair course on the ultrasonic cleaning tank, a 395 KB PDF within the workshop equipment chapter. No device model is given.

Spanish course section 3.4 on the microscope, a brief 114 KB PDF from the workshop equipment chapter of a mobile repair series. No microscope brand or model is stated.

Opening topic 1 of a Spanish course on mobile telephony fundamentals, a 343 KB PDF. No phone model or brand appears in the name.

Service guide for the Samsung SM-G532F (Galaxy J2 Prime), revision 2.8, in a 2.98 MB PDF.

EPLIS document for the Samsung SM-A715F (Galaxy A71), a compact 203 KB PDF with an 11 suffix in the name, possibly a section or version number.

Level 3 repair section for the Samsung GT-N5100 Galaxy Note 8.0 tablet, numbered chapter 08 and covering block diagrams and PCB diagrams, in a 2.17 MB PDF.

Spanish-language PDF titled semiconductores, 2.49 MB, with no device or brand stated in the name.

Schematic diagram for the Motorola XT1802, delivered as a 3.40 MB PDF. A phone schematic lets a technician follow power rails from the PMIC, trace charging, USB, display…

Generic schematic PDF of 953 KB whose name gives no model, brand or board number, so the device it covers can only be identified by opening it and reading the title…

Small 51.2 KB PDF named for the Redmi K30 Pro (spelled Remi in the name), with no board number or revision given.

Schematic diagram for the Samsung Galaxy J7 Neo SM-J701M, packaged as a 1.32 MB PDF. It lets a technician trace the battery and charging circuit, PMIC outputs, display…

Portuguese-language PDF of 351 KB whose title is a story about a woman who broke her phone screen and turned the idea into a business.

Spanish PDF titled Puntas de prueba, meaning test probes, 101 KB, with no device named.

Spanish-language guide titled Principales fallas en celulares, the main faults in mobile phones, a 1.34 MB PDF not tied to a specific model or brand.

Spanish PDF describing the charging process of the J700M, which matches the Samsung Galaxy J7 model code, 976 KB in size.

Spanish PDF on powering on a Chestnut without a screen, 1.46 MB. Chestnut is commonly used as the code name for the Xiaomi Redmi 2 Prime, though the name itself names no…

Portuguese PDF on the main rails or networks of a smartphone, converted from another format, 253 KB, with no model or brand named.

PCB layout PDF of 2.57 MB with no model, brand or board number in the name, so identify the device from the title block or silkscreen markings inside.

Part list PDF, 52.1 KB, whose generic name gives no device, brand or board number. A parts list maps location designators to part numbers, values and descriptions…

PDF of 699 KB carrying the uninformative name null, so nothing about the device, brand or board can be learned without opening it.

Short Spanish PDF on schematic nomenclature, 21.2 KB, not tied to any device. It likely explains the designator prefixes and symbols used in diagrams, such as R for…

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…

Spanish-language training document on intermediate microelectronics for mobile phones, filed under schematics but by its title a course text rather than a circuit…

Portuguese introductory study material on digital electronics, the first part of a course series judging by the numbering in the name.