Service package for the LG X155, the SVC tag in the name indicating LG service documentation, packed as a 6.10 MB RAR archive. LG service manuals usually combine disassembly steps, block diagrams, circuit schematics, component placement and troubleshooting flowcharts, which makes them useful for both board-level work and part replacement. Extract it with WinRAR or 7-Zip; the documents inside are typically PDF. Before ordering parts or comparing measurements, check that the model and any suffix on the phone label match the X155 covered here.
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 @cyberlanelectonik. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.