AV is composite video, worst pic quality after RF and shoold only be used with VHS VCRs.
Can use a normal cheap SCART
SAV is S-Video, seperates colour & b&w signal and is better than AV and can be used with SVHS VCRS, game consoles, DVDs, Digi STBs etc
Use a mini-din or fully configured 21 pin SCART
RGB is a form of component video, seperates Red, Green and Blue and is usually gives the best pic quality.
Use this on your DVD player. Can also be used with game consoles, Digi STBs etc. Whichever, it will give the best picture quality.
The RGB picture shift is a side effect with some TVs.
Use a fully configured 21 pin SCART
I've just invested in a Thor scart lead after having problems with the RGB setting in previous "cheapo" one.
Unfortunately the RGB set up still makes the picture a lot darker and has a slight "draw" along dark edges.
Tried DVD with a mates newish TV and although the "draw" had gone, the picture is still on the dark side.
TV is RGB scart but about 8 years old.
DVD Tosh 220.
Depends on the TV. Lots of TVs give an RGB picture that is way too dark and it's not even as easy as avoiding certain manufacturers - some models from a manufacturer will be ok, others will give a picture that is too dark, so you need to explore particular models. For example, Philips PW6006 has had reports of dark RGB, but Philips PW6515 is fine. Most JVC models have dark RGB feeds. I've found Sony TVs to be the most consistent with RGB feeds - haven't seen a Sony model that gives a dark RGB feed yet. That's probably because they are one of a handful of manufacturers that enable an RGB picture to be fully adjusted (contrast, brightness, colour, sharpness, etc).
If you find RGB too dark on your own TV, you should use S-Video instead.
You may not have wasted your money. An S-Video signal can be carried through SCART leads too. It doesn't require an S-Video socket. However, you will most probably need to enable a specific S-Video scart on your TV using the TV's menus. Find out which SCART sockets on your TV can receive S-Video and enable one of them
Sadly, all TV manufacturers skimp on some aspects of set design in order to save on costs. That's why when you choose a new TV you get such a headache trying to balance up the pros and cons of each set. It seems skimping on RGB is more common than other cost-saving ideas however - which is a real shame