Samsung SM-A12 schematic section dedicated to the 2 MP depth rear camera, provided as a PDF of 3.36 MB. The pages trace the depth sensor flex connector, its power supplies and the signal path to the application processor. Technicians rely on such a sheet when portrait mode or the depth module stops working, checking that each supply rail is present and that no line is shorted. Open it in any PDF viewer and compare the component references with the actual board revision you are repairing.
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.