Third section of a Samsung SM-J330 Galaxy J3 schematic, delivered as a 749 KB PDF. Read it with the first two parts for the complete picture of the phone's circuits. A technician uses such pages to look up component references, follow signal lines between connectors and ICs, and check expected rails while troubleshooting. Open it in any PDF viewer. Regional variants of the J330 can use different board revisions, so verify the model code and board markings on the phone before trusting the values.
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 @esquematicosparatodos. 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.