Electrical schematic and service manual for the LG H422, marketed as the LG Volt, in a 2.84 MB PDF with a Portuguese title. Documents like this typically include circuit diagrams, component placement and troubleshooting steps covering power, charging, audio and display faults. Use it to trace supply rails from the PMIC, find test points and identify parts by reference designator. Any PDF reader opens it. Confirm the model code on the phone label matches H422, since other Volt variants for different carriers can use another board.
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 @esquemaseletricos. 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.