Spanish course section 3.4 on the microscope, a brief 114 KB PDF from the workshop equipment chapter of a mobile repair series. No microscope brand or model is stated. A stereo microscope is essential in board repair for inspecting solder joints, cracked components, corrosion and damaged pads, and for micro-soldering connectors and small ICs. Key aspects usually include magnification range, working distance and lighting. As a short training note, it complements the other equipment topics rather than serving as a device 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 @canalesquematicos. 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.