[Ti] S-Video to TV

[Kynan Shook]

Apple uses a different connector than normal for S-Video to allow the 
Composite Video adapter to work properly; one of the extra pins in the 
connector is used for composite video, so the little adapter cable just 
connects that one pin and a ground pin to the other end of the 
composite adapter.  Unfortunately, I can no longer find the 
knowledgebase article that lists all the pinouts, but that's why.

As for why it shows up in B&W, you may be using the wrong type of 
cable, or the cable, computer, or TV may have a broken pin.  S-Video 
sends two video signals: luminance and chrominance.  Luminance is the 
brightness (aka B&W), and chrominance is the hue and saturation.  
Sounds like the pin that carries the chrominance is not properly 
connected, whether on purpose or otherwise.  Try using the S-Video to 
composite video adapter that came with the computer and use that 
instead of S-Video as a workaround.

FWIW, S-Video *never* carries sound.  It essentially takes the one 
signal sent down a composite video cable, and splits the color and 
brightness to allow for a slightly higher quality.

Simon Chapman <sc at pr100.com> writes:
> Not sure if this is a UK issue or not but my TiBook has a 7-pin 
> S-Video out
> port while the front panel of my Panasonic 28DK TV has a 4-pin S-Video
> input. Presumably this means that the TiBook sends sound signals out 
> with
> the S-Video but that the TV only accepts the video signals and I 
> therefore
> have to wire up separately for sound. But my problem is that I can't 
> find
> anyone in the UK who stocks an S-Video cable with different plugs at 
> either
> end. What do others do? Must cables be made to order?



Kynan Shook
kshook at mac.com
http://homepage.mac.com/kshook/index.html