Why don't you cut the lead on pin 19/20 ?

The only option the BV3 has, is then the RGB signal. I know, it isn't the nicest solution, but it tells you if the STB sends out a RGB signal all the time.

Well the problem is on more than the STB (scart 1 from Inverto PVR) as scart 2 (Tivo which is also setup to send out both) does the same thing.

I'm also suspicious about the set as I can tell the difference in the picture when I manually go to RGB, it just doesn't maintain the setting - it's not like it isn't even working when I manually select RGB.

Breaking the cable is a possible diagnostic option, but not one I'm too keen on adopting - although thanks for the advice about which pins are used for CVBS.  

Thanks,

Jeddy 

Jeddy,

I have been thinking about your interesting problem

As you have talked about your BeoVision 3 having three SCART sockets it means it is a 32" version because the 28" version only has two SCART sockets (VTAPE & AV)

So you can only use the V.TAPE & AV SCART socket for RGB input

Now, when looking at the circuit it appears to auto sense which signals are present on the SCART, but you have stated in a previous post that when you set your STB to RGB it also keeps sending CVBS and that may be the source of the problem.

So, the suggestion by Beobuddy to cut pins 19 & 20 frankly is a good proposal because it will show two things

1. The STB is really sending RGB which we are both sure it is, but this is a double check
2. The auto sense may take the CVBS by default if both signal exist, taking the CVBS away will force it to RGB

Why not try it and get back to us, you don't have to cut the wires, in most SCART plugs the pins are removable, if you are unlucky enough to have fixed pin, then you will have to cut the wire and resolder it after the test.

Firstly yes, 32".

ok, so I cut the wires going to pins 19 and 20. I still get sound but I'm now getting funny things happening with the picture - by which I mean sometimes it looks like the horizontal hold has gone (picture scrolling right to left) and other times you can't even work out what the picture is (diagonal lines of colours on the screen scrolling up the screen). I've tried this on both the STB and the Tivo and they both do the same thing.

I've checked the cable with my multimeter and there is still a connection between pins 17-18 and 18-17.

This doubtless proves something but I'm out of my depth here so am going to need you experts to tell me exactly what it proves please.

Thanks very much for your help so far guys, much appreciated.

Jeddy

 

Jeddy,

Your answers are very interesting, but raise more questions than it answers. I think we need to give more thought to this problem, I will get back later after I have done a bit of research.

You can not cut the pin 19/20 that's used for synk...

all diveses allways send cvbs at all time...

I think thats on the Beolink 1000, I have the Beo 4 - or is that accessed possibly from a hidden list menu?

Thanks,

Jeddy 

the tv use the cvbs signal for sync on RGB...

no sync = no pic... and you only get a rolling picture

is it in tv menu or service menu you find the RGB setting? 

What are you looking for in the picture to se if it’s RGB or CVBS that’s on ?