[mythtv-users] TV Output

[Dan Robinson]

> > I have soldered the cable, but my tv doesn't auto switch.  I wonder how
> > that works though.  Does it require pin 8?  Quote:
> > Internal: 0.0...2.0 V
> > External (16:9): 4.5...7.0 V
> > External (4:3): 9.5...12.0 V
> > Should we just set it up with 12V?
> > And can we switch it to 16:9 using a relay if that format is detected?  I
> > can remember someone on the list wanting to try it, but couldn't find it
> > in my history.
> 
> There are two pins you may need - pin 8 indicates the presence of
> a signal and it's format and there is another pin to indicate whether
> the source is composite or RGB data.
> 
> My TV allows me to explicitly select RGB which works even if the
> pin is indicating composite so I just use that. Plus I changed the
> default mode to 16:9 which means the display is always right because
> Myth pillarboxes 4:3 output by default if it thinks you have a 16:9
> display.
> 
> As to switching to the Myth input, well my TV is pretty much always
> on that now and as the Myth box is always on when would it auto switch
> to it ;-)

My Myth box is the only thing connected to the TV so that's the only
input signal (via the non-rgb scart socket currently, but via rgb
scart asap).  However, when I switch on the TV it defaults to a TV
channel rather than the scart.  Then I have to hit the AV button to
cycle to the myth input.  I want to just power-on and have the TV
switch over automatically as it does with other devices I've used in
the past.  I guess these used Pin 8 or similar.

One other thought is that (although it's another link in chain) is to
use a scart switch box and have Myth as the default input to that such
that the switch box has Pin 8 already wired.  It's a lot of effort for
such a feature mind!