Issues with CSYNC

[Foxhole]

Hello.
I own a sony crt tv model: kv29ls30e, and it seems it doesn't support csync correctly.
When using csync the colors seem to be dull, red looking like brown, for example.
This doesn't happen with sync on composite video or luma.
To get around this problem i would just use consoles with rgb and sync on composite or luma, but i also wanna use my pc (crt emudriver) which is connected via vga to scart or via UMSA, which only offers csync as the sync, so i'm stumped as to what to do now.
Apparently, i'm not the only one with this problem: http://shmups.system11.org/viewtopic.php?f=6&t=58861
Is there a way to connect the pc using a different sync or some way to fix the tv itself to support csync?
Thanks.

[Guspaz]

Does your display support sync-on-green (to be sure I'm clear, this involves only three signals)? If so, you could try to find an Extron sync converter on the cheap, since they can accept csync or separete clean sync input and output RGsB.

[Foxhole]

Hmm, to be honest, i have no idea. How can i check that?
Thanks for your reply.