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HDTV has no "Analog Audio Output"

Hi Guys

My friend has a 42" LG Plasma HDTV (DU 42PX12X) it has only one audio put via digital "optical" output. I am trying to help him connect it to his amplified speaker system. The HDTV has one extra monitor RCA audio output but only works when you are watching standard TV and processor disconnects it on HDTV channels.

Checked with LG Electronics who advised as follows:

(1) When receiving digital TV signal then no analogue audio signal available from Monitor-Out, RCA connections (2) When receiving analogue TV signal then yes analogue audio signal available from Monitor-Out, but need to turn off internal speakers (3) Digital audio output available at Digital Audio Output (Optical)

I would have thought that it would be fairly simple matter to capture the analogue audio signal at the internal speakers, irrespective of whether the TV signal is digital or analogue.

I was thinking of trying to open the set and tapping off the speakers left and right with a simple voltage divider. I could ever make it a variable attenuator. Only problem is I don't have a schematic I want to make sure the audio output is not floating as I will have to ground one leg of the divider. I guess I could measure the resistance to ground on both sides of the speaker out to see if one side is grounded? Sure wish I new the correct procedure to access the speakers there is lots of screws all round the TV. This is first time I have had to work on a plasma TV.

YOU MAY ASK WHY I AM TRYING TO DO THIS?

He all ready has an nice amplifier and speakers and doesn't really care for Dolby Digital or surround sound and stereo would be fine.

He wants to operate his system via the TV (one) remote. If he purchases a home entertain system he will have one for TV and one for volume and one for DVD player.

I also know that you could purchase a universal remote, but it can be very costly ($300) and is headache to program.

Any comments

Reply to
Biggy
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Wrong newsgroup. The TV techs are at news:sci.electronics.repair

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Reply to
Michael A. Terrell

[snip]

My oldest son has a similar problem with a Sony set. We're trying to figure out the least complex way to get the "optical" audio into a TV modulator for distribution throughout the house.

...Jim Thompson

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|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Reply to
Jim Thompson

"Biggy" schreef in bericht news:CJoFf.747$J% snipped-for-privacy@news20.bellglobal.com...

the

correct

If it's not grounded on one side, just use one of the speaker terminals and put your voltagedivider between that and ground.

Yes, lots of screws. Place it face down on a table, and start screwing ;) Beware if screws have different length, don't mix them up. First unscrew those that are in deep holes, the others may have nuts on the inside, not meant to be loosened. Try to stay friends with your friend.

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Reply to
Frank Bemelman

He bought the wrong TV.

Graham

Reply to
Pooh Bear

Nope. All NEW sets seem to be that way.

Appears to be a part of the DMCA crap.

They don't want you to be able to input one format and output another.

Heavens! You might COPY something ;-)

...Jim Thompson

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|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Reply to
Jim Thompson

I have a way of dealing with that.

I don't buy crippled crap.

This 'copy protection' has indeed got out of hand though. The programme makers ( and makers of other media ) are treating their customers as filth.

Graham

Reply to
Pooh Bear

I wonder if there's a market for a stand-alone decoder box for optical ?

I certainly don't want the bother of multi-channel surround. Most UK ( read European and rest of the world except USA ) homes are too small to have any sensible multi-channel setup anyway . Stereo is just fine by me. In fact most of the time I listen using my TV's internal speakers. Hooking it up to the hi-fi is imply too intrusive for everday stuff ( but admittedly nice for effect if you're really seriously watching a feature film ).

Graham

Reply to
Pooh Bear

Unfortunately it's not just media or "programme".

My son's equipment will only "line-out" in the same format as "line-in".

Maybe there's a business there ?:-)

...Jim Thompson

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|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Reply to
Jim Thompson

There's nothing quite like surround sound for a movie like "Red October" ;-)

...Jim Thompson

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|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Reply to
Jim Thompson

Well, that would be "stealing" their IP, wouldn't it? :)

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John Devereux
Reply to
John Devereux

Apparently, but you can't find a HDTV->NTSC converter because the standards are still in Lala land. Theres a problem with broadcasters being able to choose wether or not you can view the signal with some encryption. Thus potentially breaking any converter made today.

I hope they iron this out by the due date ;D

Cheers

Reply to
Martin Riddle

"Jim Thompson" wrote in message

[snip]

Until they make it illegal like the A/D bill Win was talking about?

Robert

Reply to
Robert

Yup and they exist.

Kal

Reply to
Kalman Rubinson

It's probably *already* illegal in the USA; circumvention of an anti-piracy device.

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John Devereux
Reply to
John Devereux

What is so hard about puting it through the SPDIF chip from any current home entertainment "receiver" and using the output of that? Oh hell, is everything but the RF and PA on one chip?

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JosephKK
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Reply to
Joseph2k

The presumption being that you have to have a 'home entertainment receiver' in the first place !

Graham

Reply to
Pooh Bear

message news: snipped-for-privacy@4ax.com...

are still in Lala land. Theres a problem with

some encryption. Thus potentially breaking any

My Samsung SIR-T165 set top box for the DLP monitor has a switch on the back to select the output format. One of the selections is 480i which I used with a Mitsubishi NTSC set for a few days until I got the DLP in December of '03. It doesn't have an RF modulator but that is all it would need -- though it was WAY too expensive for the masses. Point is it can be done. GG

Reply to
Glenn Gundlach

Easiest way is to put a small coil of wire in front of the internal speaker, hook it to a "mic" input. Move the coil around til you get the best sound and minimum buzz, and you're all set.

For the coil, get an old wall-wart, knock the laminations out of the transformer, and use the line prongs as the signal source. Voila, instant sound capture device. Also works to capture audio from telephones.

Reply to
Ancient_Hacker

Yeah.

I'm sure the wife reckons that's a great improvement on the aesthetics of a multi-thousand dollar set. Even if it works decently which I suspect is doubtful.

Graham

Reply to
Pooh Bear

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