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Marconi 4701. 2000 series colour. My greatest restoration p

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Focus Diode
(@focus)
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Wow! This is real colour television! A fantastic achievement.

Cheers
Brian

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Posted : 24/12/2015 2:21 pm
Marc
 Marc
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Hi Till,

What can I say other than well done...
The CRT looks to be a belter.
Marc.

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Posted : 24/12/2015 2:46 pm
Till Eulenspiegel
(@till)
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Hi everyone,
Well, let's hope the set behaves itself tomorrow for the Queen's Speech at 3pm.

So will I have to find another wreck to restore for next year's Queen's Speech?

Till Eulenspiegel.

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Topic starter Posted : 24/12/2015 3:07 pm
malcscott
(@malcscott)
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Hi David, the Ekco CT102 which has kept your 2000 company for the past 36 years sits patiently awaiting your attention, Malc :qq1

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Posted : 24/12/2015 3:33 pm
Till Eulenspiegel
(@till)
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Hi Malc,
I hope it's in a bad state, bear in mind I don't do easy.

Till Eulenspiegel.

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Topic starter Posted : 24/12/2015 5:29 pm
Anonymous
(@anonymous)
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I must say its reading epic restore projects like this that make it worth being a member of this forum.
well done i look forward to the next battle .
Rob t

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Posted : 24/12/2015 9:05 pm
TVJON74
(@tvjon74)
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Well done Till,

You have yet again done a sterling job.
The picture looks amazing.
Hope you enjoy the Queen.
ttt: :aad

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Posted : 24/12/2015 10:18 pm
Till Eulenspiegel
(@till)
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Hi Jon,
Let's hope the set does it's patriotic duty and work properly at 3pm tomorrow.

Coming up, the construction of a cabinet stand for the set. I reckon it deserves one. Only one problem though, the front legs have a concave shape to match the corners of the cabinet. Shouldn't be an impossible task to make one. Same style of stand was used on other 19" 2000 series sets.

Till Eulenspiegel.

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Topic starter Posted : 24/12/2015 10:42 pm
TVJON74
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Hope you got the Marconi warming up Till?

Not long to go now! ttt:

I'm sure creating a set legs will be a breeze for you and your talents.

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Posted : 25/12/2015 4:49 pm
Marc
 Marc
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Hi Till,
So, how was the Queen in Marconi vision ? ttt:

Marc.

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Posted : 25/12/2015 5:09 pm
Till Eulenspiegel
(@till)
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Hi Everyone,
I'm sorry to only offer up bad news, the set has let the side down. Everything was prepared, set top box working and tuned to BBC1. Switched on the Marconi, the picture appeared and within a few minutes then faded out. Now there is just a blank raster. Panic stations!
Flicked over the "set white" switch to reveal a thin white line, so that proves the first anode voltage is there. The voltages on the RGB transistors are high so it looks like a fault on the video board.
The set working beautifully last night.

I'd decided to try the next best thing, the GEC 2028, and guess what? it doesn't work either.

So there we have it, it's going to be a recording of the Queen's Speech. it's all very disappointing.

Till Eulenspiegel.

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Topic starter Posted : 25/12/2015 5:23 pm
ntscuser
(@ntscuser)
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Sorry to hear that Till after all the hard work you put into it.

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Posted : 25/12/2015 5:41 pm
Till Eulenspiegel
(@till)
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You know, I had a feeling this would happen. Glasnost rules of course, no photo shop pictures allowed. It has to be the real thing or nothing.

Till Eulenspiegel.

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Topic starter Posted : 25/12/2015 5:45 pm
Focus Diode
(@focus)
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Posts: 729

Really sorry to hear that after all the effort you put in to the project, a superb effort nevertheless.
I think Buckingham Palace should be made aware of this thread and an award given.
Would be a knighthood if it was down to me.

Cheers and Merry Christmas
Brian

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Posted : 25/12/2015 5:53 pm
Electrical
(@electrical)
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The Queens speech is repeated on BBC2 at 18:20, so you may have time to sort it out.
Regards Stan.

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Posted : 25/12/2015 6:04 pm
Marc
 Marc
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Hi Everyone,
I'm sorry to only offer up bad news, the set has let the side down. .

Till Eulenspiegel.

Hi Till,

After all that hard work too, what a shame.
Maybe you'll catch the repeat this evening.

Marc.

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Posted : 25/12/2015 6:24 pm
Till Eulenspiegel
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I set about at once to find what was causing the no luma fault. Instead of volt meter tests the scope will be used. No video present at the base of emitter follower VT3. My attention was drawn to the luma delay line transistor VT1 but as soon as the probe was connected up the picture reappeared. However, another fault has manifested itself, no colour, almost certainly the sub-carrier frequency needs resetting.
What is most likely to be causing all the new problems will be those carbon composition resistors are changing in value. more tests called for.
The brightness control sets the sync tip level at the anode of video DC restorer diode W1. Under the fault condition the voltage was 3 to 4volts. After the fault was cleared it became the correct figure of 8 to 9 volts.

Till Eulenspiegel.

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Topic starter Posted : 25/12/2015 7:15 pm
Till Eulenspiegel
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Minutes after submitting my last post how about this? Only two hours twenty minutes after the 3pm deadline. From BBC News: An excellent picture of Her Majesty the Queen.

Till Eulenspiegel.

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Topic starter Posted : 25/12/2015 9:06 pm
Marc
 Marc
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As the saying goes....better late than never ! :qq1
Well done Till :aad

Marc.

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Posted : 25/12/2015 9:18 pm
Katie Bush
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The Queens speech is repeated on BBC2 at 18:20, so you may have time to sort it out.
Regards Stan.

That's actually a fair suggestion, and since the Queen's Christmas Message is pre-recorded anyway, it's not quite as bad as missing a live event.

It is nonetheless a disappointment for you, and given the time and effort you've expended on the set, you deserved better.. I'll bet you could have left that telly running all night without a hiccup, but because you turned it off, and gave it cold start, it was too much stress for the old circuits.

I recall having similar 'fun' with several G6, a Bush CTV25 and funnily enough, a GEC 2028.. Not all at the same time, but scattered over the space of a couple of years, but you could guarantee if you left them to soak, they'd never fail - start them up from cold? :aao

How about a fall back position? Could I suggest the BBC's New Year annual review? At least there will be footage of all the major news events of 2015.

Marion

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Posted : 25/12/2015 9:31 pm
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