Boardview for the ZH6-PB, a secondary board of the ZH6 design, where PB likely refers to a power or port board. The BDV format opens in common boardview viewers such as OpenBoardView, showing component placement, pin numbers and nets for locating connectors and test points. At 86.1 KB the RAR is compact. Use it together with the ZH6 schematic and main board boardview, and check the PCB silkscreen matches before probing or replacing parts..
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 @schematicslaptop. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)