I bought a HDMI / VGA Converter ... and a VGA to CGA Converter for 15Khz ... but now I want to plug in on my TV CRT ... but how to create a 5 PIN RGBs to SCART cable? Is there any schematics or something to help me to do this? When I use Composite output my playscreen is not fullscreen.
That sounds like the longest and most complex route to get the Pi to display via SCART. There is a much easier route: get a composite cable (if you have a Pi A/B) or a 3.5mm to Composite cable (if you have a Pi A+/B+/2B) and a composite to SCART adapter. Here is a post that shows how to use this (it's about installing Rasplex but ignore that part).
An example 3.5mm plug to composite cable is this one: http://www.amazon.com/Parts-Express-3-5mm-Plug-Cable/dp/B0007V6JCK
and an example composite-to-SCART adapter is this one: http://www.amazon.com/Scart-Composite-S-Video-Audio-Adapter/dp/B006RBMJ46