av signal

[carlox]

i have a RPi2, I want to join it with an old scart tv. I have the 3.5 mm jack to av adapter and the av to scart adapter, but when I connect all and I give alimentation it simply doesn?t work, why? How can I solve this problem?

[fruitoftheloom]

i have a RPi2, I want to join it with an old scart tv. I have the 3.5 mm jack to av adapter and the av to scart adapter, but when I connect all and I give alimentation it simply doesn?t work, why? How can I solve this problem?

Is your TRRS Cable wired correctly ?

http://www.raspberrypi-spy.co.uk/2014/0 ... video-jack

http://www.modmypi.com/raspberry-pi/acc ... 3-x-rca-3m

[carlox]

How cany I verify it?

[DougieLawson]

How cany I verify it?

With a continuity tester. Or with a LED, a resistor and a battery.

[Burngate]

With your multimeter ...
... you haven't got a multimeter?

I'm going to assume here that the av to scart adaptor is a simple passive device, as is the 3.5 mm jack to av adaptor, with rca plugs or sockets
- have you tried all the combinations of plugs on the two adators?
You can ignore the sound, to begin with, so just try each of the jack-adaptor outputs into each of the scart-adaptor inputs.
If the scart-adaptor has a switch, try it in both positions - "out" could mean "out of the TV", or "out of whatever you've connected to it".

[B.Goode]

In addition to the fault-finding on the cable, you also need to ensure that your unspecified Operating System has been configured to output composite video.

(You have installed an OS on your microSD card and inserted it in the RPi?)

The NOOBS-lite Installer provides a trivial way to force your RPi to generate composite output, for diagnostic purposes.

[carlox]

Thanks to all. I solved the problem, now I see the video and I ear the audio, but the picture is in black/white however I have a Color Tv... why?

[B.Goode]

There are two versions of composite video: NTSC and PAL. Whichever you are using, try the other one.

[DougieLawson]

Check that you've not reversed the signal and GND on the video lead.

The TRRS plug is
T == Left audio
R1 == Right audio
R2 == GND
S == Video