Nokia X6 service material packed as a 1.27 MB zip, with the hardware type designation RM-552 given in the name. Nokia RM codes identify specific hardware builds, so the code on the phone label should match before using any diagrams. The archive contents are not listed, but documents of this kind usually include schematics or component layout pages. They let a technician trace charging and power supply paths, locate test points, check for shorts around the PMU and identify parts during board-level repair of this touchscreen music phone.
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 @esquematicosparatodos. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.