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. The subject generally involves saving user data before service, gaining root access, and using stock or custom recovery environments to wipe, restore or install firmware. Technicians should remember that rooting or unlocking the bootloader can erase data and void warranty, so a verified backup must be made first. The document opens in any PDF reader.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @canalesquematicos. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.