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TV Conversion from US to UK Functionality

04/16/2007 4:28 AM

Can anyone tell how can I convert a TEAC LCD-221 pocket size color TV to be usable in the UK?

It has an excellent picture but no sound. It seems like has a typical Quad-Detector demod circuit with several 5.5Mhz resonators. Currently it is made for Australian use but it worked well in other countries also until I got to Britan.

I would need a better than an info-desk help.

Please help!!!

Steph

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#1

Re: TV Conversion from US to UK Functionality

04/17/2007 12:00 AM

there is no easy way.

UK uses Pal B/G and Australia uses Pal I.

Suggest you buy an audio TV channel tuner for the UK that gets only sound and use that to hear the sound. They are cheap.

PAL - Phase Alternating Line. Developed by German engineer Walter Bruch and the German electronic corporation Telefunken. Walter Bruch
patented his invention 1963 and the first commercial application of the PAL system was in August 1967. Also a 625/50-line display and variant of NTSC. Proponents call it "Perfection At Last." Due to the cost of the enormous circuit complexity, critics often refer to it as "Pay A Lot," and engineering students may hear it introduced as "Picture Always Lousy." Different types use different video bandwidth and audio carrier specs. Common types are B, G and H; less common types include D, I, K, N and M. The different types are generally not compatible.

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#2
In reply to #1

Re: TV Conversion from US to UK Functionality

04/17/2007 3:18 AM

you forgot to explain the NTSC abbreviation: Never The Same Color.

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#4
In reply to #1

Re: TV Conversion from US to UK Functionality

04/17/2007 10:19 PM

haha, very interesting these abbrevation!

China system is PAL-DK.

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#5
In reply to #1

Re: TV Conversion from US to UK Functionality

04/19/2007 5:27 AM

DOESN'T PAL MEAN PROGRAMMABLE ANALOGUE LOGIC?

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#3

Re: TV Conversion from US to UK Functionality

04/17/2007 4:48 AM

Its a longtime since I played with this stuff but your problem is that the UK uses a 6MHZ spacing between the picture and the sound whereas many other countries use 5.5MHZ.

This basically means you can have good sound or a good picture, but not both!

As this is most likely a digital TV, you could contact the manufacturer for a new firmware.....or a digital switch possibility....

In the analogue days you could get in the set and tune an IF transformer to the new frequency or add a small unit which added the 6MHZ sound to the television....

Most Japenese TVs of 15 years ago had both in as standard.....

A simpler method is to forget RF completely and add a UK Video recorder and connect it to your TV with a SCART cable or video in and sound in (assuming it has a SCART or similar socket(s) of course. If it does not, send the TV back to the USA and buy yourself a cheap UK TV portable!!).

....but of course you are now not portable....

Most tiny portables are sold as being "world-wide", was yours? If yes, then the TV is maybe not operating as it should, try and get it repaired....on guarantee if possible.

But you need to contact the manufacturer if this really is important for you.

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#6
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Re: TV Conversion from US to UK Functionality

04/19/2007 6:04 AM

======simpler method is to forget RF completely and add a UK Video recorder and =======connect it to your TV with a SCART cable

in fact your way is using new rf tunner instead of your original one. too waste. Im afraid.

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#7
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Re: TV Conversion from US to UK Functionality

04/19/2007 10:26 AM

....but it is far cheaper to buy a video recorder WITH Tuner, than to buy and interface a tuner on its own, especially when you have no idea how to do that, as I believe the person concerned is not a tech buff....

And he can record programs for viewing at another time!!

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#8
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Re: TV Conversion from US to UK Functionality

04/19/2007 11:30 AM

Thanks Andy,

U had the best input so far to help me out. However, at this time we're only talking about an analog Tv that I was wondering if it is a relatively easy way to convert.

I do not even know if I could easily find the right filter for it and also what value? SO, I have to give it a miss I think.

Thanks everybody for all the discussions as some of it was informative still.

Many regards, steph

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#9
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Re: TV Conversion from US to UK Functionality

04/20/2007 5:50 AM

Thanks for your kind words.

If you really need to get the set modified, then go to a local UK TV Engineer shop, especially if the Guy is approaching 60 years old, he will show you the IF to tune, but be carefull,there are very high voltages in a set and they bite real hard, or he will do it for you.

If you are really lucky, he may still have one of the little units around that is placed in parallel in the tuner so that the set can receive both sound channels at 5.5 and at 6 MHZ.....Once in, they do not need to be removed at all....

They used to cost about $10 a good 20 years ago!!!

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#10
In reply to #9

Re: TV Conversion from US to UK Functionality

04/20/2007 8:41 AM

these tiny sets will have a fixed IF with a chip or two. If you can find the chip and access it there is often a hi/lo you can set to choose the IF, but these are often only found in higher priced units and that hi/lo is brought to a switch or a set of junpers. If the chip is accessible you may be able to find the pin top bring hi/lo to choose the IF.

All the voltages in here will be low except for the back light fluorescent light which will be ~90 volts

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