Samsung SM-A02S schematic page for the 2 MP depth rear camera, a 3.70 MB PDF. The depth sensor supports background blur in portrait mode, so this sheet helps when that feature fails or the module is not detected. It lists the connector pins, supply rails and control signals between the sensor and the processor, letting you check voltages and continuity at the socket. Read it in any PDF program, and compare the actual board and model of the handset with the document before replacing parts according to it.
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.