I have got my PYE all up & running now, but can't seem to locate where the yellow wire on the CRT socket connects to I think it maybe the video signal, as I have a raster but no input from the tuner!!

Pics: Image Link

I'm pretty sure it's the video wire, though would have to look at some circuit diagrams (and my main computer is dead). Do you have a circuit diagram for the set?

Chris

I do have the schematic for this, I have tried connecting the wire around the vicinity of the 6BL8 to inject the video signal that way, still nothing!

Are you able to trace it via the circuit diagram? It should show where it connects to from the socket, if you know which pin it connects to.

Chris

I did a comparison with my Kriesler P117 and confirmed that the yellow wire definitely is a Contrast wire It goes to the contrast potentiometer

I will check resistors next, maybe one has gone open circuit in the video input circuit!!!

The yellow wire on CRT's is usually the cathode connection (video signal). Which end isn't connected? It needs to go to the correct spot, guessing won't work. The signal at the input to the 6BL8 video amp is much to small for the CRT to react to.
A raster with no video could be a fault anywhere in the tuner or IF circuits. Do you get sound? If you do that confirms the RF and IF stages are working.

I get sound and I can time into a modulator all works well!!
I think this is definitely a video signal wire, I can't see anywhere under the chassis where it came from!!

I don't have an early Pye TV chassis to check where the wire connects to.

How good are you at comparing circuit diagrams to chassis layouts? The only way to workout were your yellow wire goes, is to trace the circuit on the chassis to find where it connects to.

If that's too complicated, then post a picture of the underside of the chassis, preferably a close up of the area around the video amplifier valve socket. That way I'll see if I can figure it out from your photo.

Got some pics:
Image Link
Image Link
Image Link

Hope this helps!

The photos are quite tiny.

It does help but not as much as I hoped. Things are not quite the same as when your TV left the Marrickville factory!

Pin 8 of the valve socket is the area I'm interested in. The 27k and 33k one watt resistors are in the way but it appears that the yellow wire that goes off to the left of the pictures terminates at this pin.
Can you confirm that this is the case? If so follow this yellow wire and see where it goes. It should end up connecting to the junction of a 100k resistor and a 2μF electrolytic capacitor. The other end of these two components should then connect to a 100k resistor and a 10k resistor in parallel with a 100pF capacitor. The other end of the 10k resistor is where the CRT cathode wire should connect.

I have posted a video on my YT Channel,

http://youtu.be/6NSnr_8yJtc.

Okay, the video explained some things.

There are several components between pin 8 of the video amp and where the yellow wire needs to be connected. Now that I know where pin 8 connects to on the terminal strip it looks like that big grey Ducon capacitor might be C58 which should be a 2μF electrolytic.
If I'm seeing things correctly (it's very hard to tell) it looks like the positive end of the Ducon cap connects to the fourth terminal of the terminal strip counting from left to right in your photos. I'm not counting the earth lug on the mounting post. Can you confirm the value of the Ducon cap and where the positive pin connects too (terminal number)? Can you then list all other parts that connect to this terminal and where they go. I can see what might be R77 (100k) sitting under the smaller Philips "mustard" capacitor but there is no sign of R133 (10k).

More indepth look:
http://youtu.be/F2rG55U0beE.