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Posh Pye CT474 (G11) TV Set

 
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Posh Pye CT474 (G11) TV Set

Post by marc » Sat Aug 27, 2016 7:11 pm

Hi all,

A recent purchase from eBay has given me a rather nice Pye CT474 G11 telly all the way from sunny Redcar, or it would have been if deluge of rain ever stopped :cch

The set is a 22" with remote control in pretty good clean condition only requiring a good polish. The remote control itself looks almost new and untouched leading me to think that the set has seen very little use since it's 1980 inception.
Unfortunately the Pye is still in the back of the car (we are having a short break away) so I can't play with it as yet but curiosity got the better of me this afternoon and I just had to have a spy in the back of it.....and what a surprise it had instore for me.....it looks like new ! The only dust in there is what's dropped through the back card vents other than that it's spotlessly clean with bright shiny solder. Opening out the panels reveals everything to be totally original.....even down to the red 470uf cap on the PSU......anyone got a 'safe' Philips replacement for sale ? Or can I use a good quality new cap ?
The CRT hasn't any signs of sooty dust on, it's just clean !

It just seems like this Pye has been frozen in time, even the 3 screws holding the back on undid with a sort of crack as if they had never been moved before.

It's going to be interesting to see what happens once I get this little beauty home and try it out.....although not until it's PSU cap has been replaced.

I will add photos to this thread once home so for now here are the eBay shots.

Marc.
image.jpeg
Original eBay photo
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Original eBay shot 2
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Original eBay shot 3
image.jpeg (28.61 KiB) Viewed 2595 times

 
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Re: Posh Pye CT474 (G11) TV Set

Post by marc » Mon Aug 29, 2016 9:53 pm

Hi all,

Here are some photo's of the Pye in 'as received' condition....
In the back apart from a little dust that's fallen through the rear vents it almost looks unused !
Even the remote control looks new.

Marc.
DSCF3676 (Small).JPG

DSCF3679 (Small).JPG

DSCF3680 (Small).JPG

DSCF3681 (Small).JPG

DSCF3684 (Small).JPG

DSCF3685 (Small).JPG

IMG_0037 (Small).JPG

 
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Re: Posh Pye CT474 (G11) TV Set

Post by Cathovisor » Mon Aug 29, 2016 10:12 pm

That really has had only the lightest of use, hasn't it? I'm astonished. Probably only ever used to watch Songs Of Praise on a Sunday... :qq1

 
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Re: Posh Pye CT474 (G11) TV Set

Post by marc » Mon Aug 29, 2016 10:29 pm

Cathovisor wrote:That really has had only the lightest of use, hasn't it? I'm astonished. Probably only ever used to watch Songs Of Praise on a Sunday... :qq1

I wondered if it was Christmas and Easter myself :aaq

As I mentioned earlier with the way the rear cover screws came undone with a sharp snapping noise and the fact that the impression of the washers in the fibre board being so clean it does lead me to believe that I'm possibly the first person to take the back off it since new not to mention "that red cap" is still there.

Marc.

 
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Re: Posh Pye CT474 (G11) TV Set

Post by Cathovisor » Mon Aug 29, 2016 11:10 pm

marc wrote:
Cathovisor wrote:That really has had only the lightest of use, hasn't it? I'm astonished. Probably only ever used to watch Songs Of Praise on a Sunday... :qq1

I wondered if it was Christmas and Easter myself :aaq

That might be closer.

 
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Re: Posh Pye CT474 (G11) TV Set

Post by marc » Sat Sep 03, 2016 3:20 pm

Hi all,

With thanks to our very own Chris (Crusty) I know have the correct replacement 470uf cap for the PSU installed. :aad
As suspected the old red cap does check out fine so will go into stock to be used for another purpose in the future.

Marc.
DSCF3689 (Small).JPG

 
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Re: Posh Pye CT474 (G11) TV Set

Post by marc » Sat Sep 03, 2016 3:37 pm

Hi all,

first power up revealed......
DSCF3691 (Small).JPG

 
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Re: Posh Pye CT474 (G11) TV Set

Post by Cathovisor » Sat Sep 03, 2016 3:41 pm

Isn't the G11 the telly with the TDA2600 in a QIL socket for the frame deflection?

 
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Re: Posh Pye CT474 (G11) TV Set

Post by marc » Sat Sep 03, 2016 3:50 pm

Hi Catho,

Yes I believe your right. :aaq

Feeding in a signal gives sound and vision is there too inside the frame collapse.

 
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Re: Posh Pye CT474 (G11) TV Set

Post by marc » Sat Sep 03, 2016 4:15 pm

So after giving the IC on the time base a wobble and a re-seat we have this....
DSCF3693 (Small).JPG

 
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Re: Posh Pye CT474 (G11) TV Set

Post by Focus 2 » Sat Sep 03, 2016 4:17 pm

Even if it checks ok I would still be suspicious of that red can capacitor, or any similar capacitors carrying the Pye logo. I fitted one in a 1400 which failed in a very short time and they also gave trouble in Pye hybrid CTVs.

That's a great start, I haven't seen a G11 in use since 1983. I remember it had Teletext and an ultrasonic remote.

EDIT- Wow! It looks superb. Well done.

Cheers
Brian

 
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Re: Posh Pye CT474 (G11) TV Set

Post by marc » Sat Sep 03, 2016 4:51 pm

Focus 2 wrote:Even if it checks ok I would still be suspicious of that red can capacitor, or any similar capacitors carrying the Pye logo. I fitted one in a 1400 which failed in a very short time and they also gave trouble in Pye hybrid CTVs.

That's a great start, I haven't seen a G11 in use since 1983. I remember it had Teletext and an ultrasonic remote.

EDIT- Wow! It looks superb. Well done.

Cheers
Brian

Hi Brian,

I'll bear that in mind re the old red cap.
The remote on this set is infra-red

Marc.
Last edited by marc on Sat Sep 03, 2016 5:07 pm, edited 1 time in total.

 
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Re: Posh Pye CT474 (G11) TV Set

Post by marc » Sat Sep 03, 2016 4:56 pm

I've had a good close look at the soldering of the IC socket (TDA2600) and can't see any dry joints especially around pin 16 but wobbling the IC to restore operation is making me think the socket could be faulty, any thoughts ?
Also where are replacement sockets available from ?

Marc.

 
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Re: Posh Pye CT474 (G11) TV Set

Post by malcscott » Sat Sep 03, 2016 5:16 pm

I should have nos IC holders in stock here, Malc.

 
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Re: Posh Pye CT474 (G11) TV Set

Post by PYE625 » Sat Sep 03, 2016 5:42 pm

What a beauty of a set....would go well in a "Pye gallery" with my CT72 lol

 
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Re: Posh Pye CT474 (G11) TV Set

Post by Focus 2 » Sat Sep 03, 2016 5:44 pm

You could try carefully resoldering the pins on the holder as joints can look fine even though they're not.
Brian

 
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Re: Posh Pye CT474 (G11) TV Set

Post by marc » Sat Sep 03, 2016 5:50 pm

Focus 2 wrote:You could try carefully resoldering the pins on the holder as joints can look fine even though they're not.
Brian

I'll thought about giving that a go but I'm more concerned that the fault may lie with the socket to chip side rather than the PCB side, but it certainly won't hurt to re-solder it :aaq

Marc.

 
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Re: Posh Pye CT474 (G11) TV Set

Post by Doz » Sat Sep 03, 2016 5:55 pm

If pin 1 of the socket (which draws a lot of current), you could bend the pin out and solder a wire to it and connect it to the wire link with two ferrite beads on it next to it. A christmas eve job, but will get you going.

 
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Re: Posh Pye CT474 (G11) TV Set

Post by marc » Sat Sep 03, 2016 5:57 pm

PYE625 wrote:What a beauty of a set....would go well in a "Pye gallery" with my CT72 lol

It didn't look bad at all did it....
but now another niggle has cropped up, everything now has a red hue on it.
DSCF3704 (Small).JPG

 
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Re: Posh Pye CT474 (G11) TV Set

Post by marc » Sat Sep 03, 2016 5:58 pm

malcscott wrote:I should have nos IC holders in stock here, Malc.

Hi Malc,
PM sent.

 
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Re: Posh Pye CT474 (G11) TV Set

Post by Red_to_Black » Sat Sep 03, 2016 6:16 pm

marc wrote:
PYE625 wrote:What a beauty of a set....would go well in a "Pye gallery" with my CT72 lol

It didn't look bad at all did it....
but now another niggle has cropped up, everything now has a red hue on it.
DSCF3704 (Small).JPG



It has dropped the Green,

Check for dry joints on the colour decoder/RGB panel, there are 3 RGB output transistors mounted on to a heatsink, these are commonly dry jointed.

In fact I would go over the entire set, we used to do a "blanket solder" job on these as they were usually riddled with D/J everywhere.

Re: the Frame chip socket, the early socket used on this chassis did fail as you say "chip side", the replacement socket was a modified type (ceramic instead of plastic IIRC), as your set still had the red cap it is likely that it also has the original frame IC socket.
Make sure you remove the ALL old heatsink compound from both the chip and the heatsink and apply fresh compound to the chip when/if you replace the socket C/O Malc.
The dodgy socket can destroy the TDA 2600 chip.

 
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Re: Posh Pye CT474 (G11) TV Set

Post by marc » Sat Sep 03, 2016 6:25 pm

Red to black wrote:
It has dropped the Green,

Check for dry joints on the colour decoder/RGB panel, there are 3 RGB output transistors mounted on to a heatsink, these are commonly dry jointed.

In fact I would go over the entire set, we used to do a "blanket solder" job on these as they were usually riddled with D/J everywhere.

Re: the Frame chip socket, the early socket used on this chassis did fail as you say "chip side", the replacement socket was a modified type (ceramic instead of plastic IIRC), as your set still had the red cap it is likely that it also has the original frame IC socket.
Make sure you remove the ALL old heatsink compound from both the chip and the heatsink and apply fresh compound to the chip when/if you replace the socket C/O Malc.
The dodgy socket can destroy the TDA 2600 chip.

Thanks for that, I had a sneaky feeling the sockets could be a chip side problem.
I'll take a look at the decoder/RGB board for dry joints after tea and report back.

Marc.

 
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Re: Posh Pye CT474 (G11) TV Set

Post by marc » Sat Sep 03, 2016 8:13 pm

Hi all,

Not exactly a dry joint......
Decoder removed and green output transistor leg had not been soldered properly it's just resting against the track !
There is a pool of solder around the leg but it hadn't flowed to the leg itself so this fault has been around since the set was manufactured :ccf
Hopefully a full compliment of RGB should be present once the decoder is back in place.

Marc.
DSCF3709 (Small).JPG
Spot the lack of solder flow

 
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Re: Posh Pye CT474 (G11) TV Set

Post by marc » Sat Sep 03, 2016 8:32 pm

Hi all,

Decoder re-installed and RGB is back :aad
I've decided not to run the set for any length of time until the chip socket is replaced, I don't fancy damaging the TDA2600, but the set is looking like it's going to be a belter.
Thanks everyone for your input so far and hopefully I will be able to post some final photo's of the Pye in it's living space shortly. :)

Marc.
DSCF3717 (Small).JPG
RGB all back and working.

 
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Re: Posh Pye CT474 (G11) TV Set

Post by Red_to_Black » Sat Sep 03, 2016 9:13 pm

That looks to be a fantastic picture :aad

These sets suffered from dodgy soldering everywhere from new sadly, once any mods needed were done (Cap and frame socket) and given a thorough re-soldering (everywhere) they gave a good account of themselves, they were then fairly reliable and soldiered on until they were usually scrapped because they had flat tubes, by then they were pushing + 10 years old.

That set doesn't looked to have had much use and will be a cracking example.

I don't know if it was just me :aab , but the PYE sets always seemed to have more poor soldering than the Philips badged ones, but they were both pretty bad from new.
I think it was Rich, or someone on one the forums, or maybe an article in the TV mag, said this chassis was one of the first to use fully automated soldering, and this may account for this while they were getting to grips with the then new process.

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