Front camera schematic for the Samsung SM-A21s, PDF, 3.82 MB. It shows the selfie camera connector together with its power rails and data connections to the main board. Technicians use it when the front camera does not start or produces a black frame, measuring supply voltages at the connector, checking for shorted filter components and tracing signal lines. Any PDF reader can open the file. Ensure the device is the SM-A21s, as other Galaxy A models use different camera circuits.
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.