Compressed schematic set for a Samsung device identified only by the model code T970, a code that probably belongs to a Galaxy Tab family. The ZIP archive should be extracted to check whether it contains circuit diagrams, layout drawings or both. With mobile schematics a technician follows supply rails from the battery connector and PMIC, checks charging and display circuits and locates test points for measurement. The name gives no board revision, so compare markings on the actual board before trusting values.
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 @phoneSchematics. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.