Front camera circuit page from the service schematics of the Samsung SM-A02S, distributed as a PDF of about 3.70 MB. It details the selfie camera connector, its supply rails and the data lane routing, so a technician can work out why the front camera fails to open or shows a black image. Use a PDF viewer to follow the voltage rails to the connector pins and check them with a multimeter, and compare the filter and protection parts near the socket with the drawing before replacing the module or chasing a board fault.
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.