Rear camera schematic for a 48MP wide main camera, PDF of 3.82 MB. The name itself does not state the phone model; the file size matches the Samsung SM-A21s sheets, but that link is not confirmed by the name, so check the content before use. Such a page shows the camera connector, its supply rails and data lines, used to measure voltages, find shorts and trace signals when the main camera fails. Open it in any PDF viewer and confirm the board model printed inside matches the phone.
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.