Schematic part 3 for the Samsung SM-J250F (Galaxy J2 Pro), the largest PDF of the numbered set at 3.34 MB, which suggests it contains detailed or image-heavy pages. The name does not identify the circuits covered. Technicians rely on such drawings to trace power rails, locate components and test points, and work out the cause of a short or a no-charge fault. Open it in a PDF reader, cross-reference it with the other parts, and confirm the model and revision on the title block.
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 @mobileshematic. 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.