This article is from the Amiga CD32 FAQ, by Stuart Tomlinson with numerous contributions by others.
A: There are easily accessable RGB signal test points on the CD32's circuit board. The diagram is at the end of the FAQ. The SX-1 and CD32x both have RGB connectors on them.
A: Peter Kittel wrote: If you have the French version of the CD32, you have RGB at the S-Video jack. In this case, this jack is no more of standard "Hosiden" type, but is a Mini-DIN with 8 pins. The four extra pins carry R,G,B, and CSync.
<email@example.com> wrote: Cables (maybe with extra logic) are being sold in France, which allow you to connect your CD32 to a 1084, presumably using that SCART-RGB output.