Date : Thu, 19 Jan 2006 09:21:49 GMT
From : Wookie <wooky@...>
Subject: Re: Master to SCART
In message <4deacd9d22info@...>
Sprow <info@...> wrote:
> I tend to think it might be. The instructions seem quite odd, if we assume
> the sync is driving into 75R (as it's on the normal composite input) then
> it's going to be about
> 5 * 75/(270+75)
> or 1.08V, that's huge for a composite sync, which would normally be about
> 0.3V.
>
> As the RGB lines don't carry any sync information, it's possible that the TV
> is also recovering the black level from the back porch region of the sync.
>
> I would favour series 1N4148 diodes myself, else a larger resistor, say
> 470R. Infact it seems odd to suggest needing 220 and 270R parts - maybe it's
> a typo in the translation to the webpage?
> Sprow.
>
> > How long is the cable, is it screened, and
> > if so, have you connected the screen to the plug screen at both ends?
>
>
This is the wiring I used for my Master to TV and it works perfectly
Scart connector pinout:
+------------------------------------+
\ 20 2 |
\ | | | | | | | | | | |
\ |
| |
| | | | | | | | | | | |
| 19 1 |
+--------------------------------+21 = shielding (case)
BBC Din plug SCART plug
red (1) -- 430 ohm -- red (15)
green (2) -- 430 ohm -- green (11)
blue (3) -- 430 ohm -- blue (7)
sync (4) -- 430 ohm -- video input (composite) (20)
0 V (5) ------------- blue gnd (5), green gnd (9), red gnd (13),
blanking gnd (14), RGB switching control gnd (18)
( I use the wire shield for this connection )
5 V (6) -- 82 ohm --- RGB switching control (16)
430 ohm Yellow Orange Brown, 82 ohm Grey Red Black
If you've got a monospaced font for your email that should look right.
Cheers Wookie.
--
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