TLDR see here for solution:
viewtopic.php?f=6&t=65583&start=66
Hi Guys
Looking to see if there are any crt gurus on here who can help me out.
I have been working on getting s-video working on an old trinitron crt. The jungle chip doesn't look to have any rgb inputs but it does have Luma and Chroma.
The one i am modding is the smaller one pictured below which only came with an rf antenna input.

Model number : KV1414AS
Jungle : CXA-1213S
GP-1A chassis
No service manual could be found for this exact model but this one is basically the same
https://elektrotanya.com/sony_kv-2170m3 ... nload.html
This tv has the same jungle with an s-video input
https://elektrotanya.com/sony_gp-1a_kv- ... nload.html
Jungle datasheet
https://www.alldatasheet.com/datasheet- ... 213AS.html
I have tried the configuration that the s-video tv uses in the second link above but only got a black screen with the green channel number showing.
The only setup where i got any success was inserting the Luma and Chroma directly from the s-video port into the jungle which results in the image below. I was told this could be sync related but not entirely for sure. It's trying to show the title screen of snes dk2.

Can anyone offer any advice on what they might try? Happy to provide more info/schematics etc. Just trying to not let this initial post get too long.
Thanks.