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.

Manual of digital electronics written in Spanish, a general reference rather than a schematic for any particular equipment.

Portuguese list of common defects and possible solutions for reported problems, written as a troubleshooting guide.

Short Spanish document on Kirchhoff's laws, the current law for nodes and the voltage law for closed loops.

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

Spanish electronics learning series El mundo de la electronica, issue 21, in a PDF of about 1 MB.

Plain text note in Spanish whose title says it covers drivers for all phone brands, yet at only 39 bytes it can hold little more than a single line, most likely a link…

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.

Spanish-language course document on Android devices, supplied as a 424 KB PDF and filed under schematics although the title points to training material rather than a…

Portuguese reference titled charging connectors and devices, a 1.18 MB PDF that appears to list charging ports and the phones they fit.

Short electronics course in Spanish, a 1.26 MB PDF catalogued with schematics but evidently a teaching document rather than a circuit for a particular device.

Compatibility chart in Portuguese for charging connectors, a compact 183 KB PDF listing ports that can be swapped between handsets.

Spanish reference on interchangeable integrated circuits for mobile phones, a 273 KB PDF.

Charging pin compatibility guide in Spanish, a 2.03 MB PDF that presumably groups phones sharing the same charge connector or flex.

Portuguese guide on fixing iPhone error 4013, converted to a 310 KB PDF. Error 4013 typically appears in iTunes or Finder during restore and is commonly linked to…

Spanish tutorial on recognising components in a schematic, a 310 KB PDF intended as training rather than a diagram for a specific device.

Backlight circuit document in Spanish, a 741 KB PDF that likely explains or diagrams a display backlight driver stage.

Spanish manual on unlocking, releasing and flashing mobile phones, a 3.27 MB PDF. No brand, model or tool is named in the title, so expect general procedures covering…