Boardview file for the Apple iPad Air logic board in .pcb format, about 19.5 MB. Boardview files show the component layout, part designators, net names and pin connections, allowing a technician to locate a capacitor on a shorted rail, find test points and follow a signal across layers. The .pcb extension is used by several programs, and such files are commonly opened with viewers like OpenBoardView, FlexBV or ZXW-type tools. Make sure the logic board matches the iPad Air model before using its locations.
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 @boardview. Enginerys does not host this file.
How to open a .pcb file
In repair archives a .pcb is typically an XZZ (XinZhiZao) boardview — popular for phones and recent laptops.