Boardview for the ASUS P550L, X550LD and K550LD notebooks, revision 2.0 of the shared mainboard. The .fz container is a compressed boardview format opened by tools such as FlexBV or OpenBoardView, giving a clickable part placement map with net names. Technicians use it to locate components, follow a rail from connector to load and probe test points while hunting a short. Confirm the revision silkscreened on your PCB reads 2.0 before trusting pin positions, since ASUS often reworks layouts between revisions of one model family.
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 @boardviews. Enginerys does not host this file.
How to open a .fz file
Compressed and encrypted boardview used for ASUS, ASRock and Pegatron boards.