Boardview for the ASUS X551CA laptop mainboard, revision 2.2 as given in the name. The .fz format is the compressed ASUS boardview type, opened with tools such as OpenBoardView, FlexBV or Boardviewer. It shows part placement, net names and pin connections, letting a technician find test points, locate components on both sides of the board and follow a rail from its source to its load. Confirm that the revision silkscreened on the PCB reads 2.2 before trusting part locations, since other revisions may differ.
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 @biosarchive2dollarpaypal. Enginerys does not host this file.
How to open a .fz file
Compressed and encrypted boardview used for ASUS, ASRock and Pegatron boards.