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.

Basic electronics course in PDF form attributed to Humphrey Kimathi, 4.45 MB, filed under schematics but in practice a learning text.

Basic electronics primer in English, a 2.66 MB PDF catalogued with schematics though it is a learning text rather than a circuit for a product. No device is named.

Basic electronics material in Spanish, with the word electronics misspelled in the name.

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

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.

English PDF titled basic electronics, 583 KB, not tied to any device or board. It is reference and training material rather than a service schematic.