Persian PDF titled mobile repair, about 294 KB in size and catalogued as a schematic. The name gives no phone model or board number, so it is most likely a general guide to mobile phone troubleshooting rather than a circuit diagram for one device. Such guides typically explain power, charging and display faults and basic measurement techniques. Open it in any PDF reader. For component-level work on a specific handset you will still need that model's own schematic.
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 @schematic_mobile5. 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.