Symbol 5636-2 from IEC 60417 - Title/Meaning: Two component video input, digital Function/description: To identify controls and connecting terminals specifically meant for digital Y/C separate video input.
Additional information: 
Published in: Supplement O, 1996,3C/293/DIS
Own work using: iso.org/obp/graphics/grs/5c649bce-61ad-49c9-8d4b-6c5109ddef5b 200.png
Vectorization:  Mrmw