Front camera page of the Samsung SM-A30S (Galaxy A30s) schematic, in a 4.30 MB PDF. It documents the selfie camera connector, its supply rails, clock and data lanes back to the processor. Technicians use it when the front camera fails to open or shows a black image, measuring the camera voltages at the connector and checking the regulators and filters on the path. View it in any PDF reader, and confirm the connector and component designators against the real 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 @phoneSchematics. 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.