: The main circuit layer (Part #01-02402-207).
: Components for adjusting the keyboard's tilt angle (30mm). kb 5150 schematic diagram top
: Plated through holes are not recommended for this specific substrate because the cellulose core is susceptible to electrolyte attack. Top Assembly Components : The main circuit layer (Part #01-02402-207)
The typically refers to the Key Tronic KB 5150 kb 5150 schematic diagram top