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The RGB-21 cable is identical in shape to a SCART one. The only way to tell them apart is by opening them and examining the pins used. It was used in Japan for high quality video signals.


The commonly used pins are in bold.

Scart pin layout.png

  1. Left audio input
  2. Left audio output
  3. Audio input ground
  4. Audio output ground
  5. Right audio input
  6. Right audio output
  7. Sync input ground
  8. Sync output ground
  9. Sync input
  10. Sync output
  11. AV control signal
  12. RGB video signal mask (Ym)
  13. Red ground
  14. Ym/Ys ground
  15. Red
  16. Video signal switch (+5v)
  17. Green ground
  18. Blue ground
  19. Green
  20. Blue
  21. Ground

  • Composite video signal is a standard video terminal (yellow) and the same. Are superimposed on the decoding sync signal, 0.7Vp-p, 75Ω matching.
  • RGB signals (red, green, blue) are positive analog signals: 0.7Vp-p, 75Ω.
  • Audio signal is 0.4V rms, input impedance is 47kΩ, output impedance is 10kΩ.

External Links

Wikipedia entry (Japanese)