Service manual for the Galaxy A40 in a 13.7 MB ZIP archive, with no model code variant given in the name. Samsung manuals of this type usually include disassembly instructions, exploded views, parts lists and level 3 schematics or board layouts. Check the model number on your phone and compare it with the variants listed inside the manual. The documents are used to trace charging and power paths, locate components and test points and look up spare part numbers during repair.
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 @esquematicosdecelulares. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.