How to connect Home Theater with SCART output to J-series TV

[rejected]

I try to connect (a little vintage) Panasonic DVD Home Theater Sound System (SA-HT75) with Samsung JU7000 (JU7100), both to play DVDs (video only goes from HT to TV) or to amplify TV sound (audio only goes from TV to HT).
While there was a SCART interface with HU6900 series, there is no SCART interface with JU7000 series
I do have SCART <-> 6xRCA (6xCinch) cable (marked as 3xaudio+video Out and 3xaudio+video In), but there is no signal from HT on TV
Connecting with composite video (analogue) HT output (yellow) to TV composite video input (yellow) was successful, but I guess there is a chance of better signal quality with HT SCART output (s-Video or RGB signals).
Might be my cable is wrong (as there is a lot of different EURO <-> RCA cables on the market) or is just that impossible to connect SCART HT with JU7000 series - any ideas?

[maximob]

try an adapter