RAR archive of 1.83 MB named for the Lenovo A5500, which matches Lenovo's tablet naming, though the file does not say what it holds. It could be firmware, a flashing tool or service files, so extract it and inspect the contents before using it on a device. Check that the exact model and hardware variant match, as Lenovo releases regional versions with different firmware. Back up the existing device data or partitions before writing anything, because a mismatched image can leave the unit unbootable.
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 @Schematics_Mobile. Enginerys does not host this file.
All sources (21)
The same file was posted more than once. If one link is dead, try the next.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.