Samsung SM-A11 schematic pages for the 48 MP wide rear camera, a 2.81 MB PDF. They show the camera connector pinout, sensor supply rails and the data and control lines to the application processor. A technician refers to this when the main camera fails or the app reports a camera error, measuring the analog, digital and I/O supplies and checking connector pins for shorts. Open it in any PDF viewer and confirm the board revision of the phone matches the drawing first.
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.