This is the Atari Lynx model 2 keys flex ribbon PCB scan. It's colour coded to show which keys are connected to which tracks. The original image is sourced from DevLynx, a website by Vince. The French version is translated to English with help from Google Translate.
Scan
Pinout
 | Red : LED (it is missing on the scan) Green : Left (or right in flip mode) Yellow : Up (or down in flip mode) Cyan : Down (or up in flip mode) Blue : Right (or left in flip mode) Rose : On (linked to Off) Dark green : Off (connected to Common) Brown : Back Light Purple : Option 1 (or option 2 in flip mode) Khaki : Pause Emerald : Option 2 (or option 1 in flip mode) Gray : A Orange : B Black : Common/Ground |