Persian-language PDF tutorial filed under schematics, its title explaining how to find a component's replacement or value from similar boards using schematics. It is a training guide rather than a diagram for one specific device, and no model or board number is named. Such material shows how to cross-reference part numbers, reference designators and circuit blocks between related motherboards when a burnt part cannot be read. Any PDF viewer opens it, and it is most useful alongside the actual schematics of the boards being compared.
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.