Troubleshooting document for a Samsung model labelled A5S with code SM-A528B, stored as a 3.62 MB PDF carrying a doubled extension. Samsung troubleshooting guides usually pair fault-by-fault flowcharts with schematic excerpts and component locations for problems like no boot, no charge, no display or audio faults. They help narrow a fault to the right area before probing with a multimeter. Open it with a PDF reader and compare the model code on the device with the one in the guide.
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 @uzb4422. 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.