Newsgroups: sci.engr.television.advanced
Subject: Re: RGB Outpit on Philips 32PW6506
References:     <[email protected]>   
Roderick Stewart  writes:

> In article , Fred Glaser 
> wrote:
> > I don't think I am brave enough to go near any sockets on the tv! Do you
> > think I should maybe get a Philips engineer out to check it?
> 
> Actually, I said "plug", not "socket", meaning the plug on one end of the 
> SCART cable, to which it ought to be safe to attach signals or low 
> voltages, this being its purpose. Most of the wires are used to carry 
> video or audio signals, but two of them are used to carry voltages that 
> tell the TV what sort of signals they are. 

This is right.

> The voltage on Pin 8 indicates 
> the presence of a signal on that SCART input, and that the TV should 
> select it, and also whether it is widescreen or not, 

Yes. 
0V     here means that no signal is coming in
4.5-7V here means 16:9 signal coming in
9.5-12V here means 4:3 signal coming in 

> and the voltage on 
> Pin 16 indicates whether the signal is S-Video or RGB.

Pin 16 is acutally originally specified to select between 
composite video and RGB video formats. 
So 0V here means use composite video signal.
Something like 1V or more here means that use RGB signal.

There is no specific signal to select between S-video and composite 
video. If the SCART you use is configured to use S-video, then 
I thinsk the TV will take S-video in when pin 16 is at 0V.
 
> Unfortunately, not every manufacturer implements every part of this 
> standard on every item of equipment, 

That's a source of many problems. 
Especially the the question of S-video and SCART is troublesome...

> which is why I suggested that maybe 
> your digibox doesn't output the required RGB switching signal. I would be 
> disappointed with a TV that could only be switched to RGB by an external 
> signal, rather than manually through a setup menu, but if this really is 
> the case, then it may be that although your TV is capable of displaying 
> RGB, it is never being switched to do so.
> 
> Or there could be something else wrong with it, but I'd check the simplest 
> thing first.
> 
> Rod.
> 

-- 
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at 
http://www.epanorama.net/