Samsung UN40J5200 TV Schematic?

Buy the handbag. ;)

Cheers

Phil Hobbs

-- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510

Wouldn't it be easier to get an external speaker selector switch that also has a headphone jack (or even a small stereo)? Wouldn't need to open the TV at all.

As you well know I'm never into "easier", though maybe a sound bar is _the_ solution. ...Jim Thompson

so has a headphone jack (or even a small stereo)? Wouldn't need to open t he TV at all.

I am not sure if TV repair places have the schematics. We had a TV fail w hile in warranty. The repair guy looked it me funny when I said something about finding the problem. Isolating the failure to a pc board seems to b e as much trouble shooting as they do.

Do not buy a LG tv. When the set failed again, no repair parts were availa ble including on Ebay.

Dan

n run at same time..."

Manufacturers don't supply them these days - much. I one exists you might f ind it on Google, put in brand and model and then "free service manual". Lo ok for links with "electrotanya" in the URL. Once there look at the page an d notice where it says "processing" in text. After a minute that changes to "Get Manual" and is the link to the actual download. Don't click anything else, it's toolbars, download "helpers" n shit like that. Only that text ge ts you the manual. I am leery about other sites.

You shouldn't need a print to do your hack. There is an internal switch on the headphone jack that mutes the speakers, it is a simple matter of discon necting or jumping that out.

Incidentally, do not be tempted to wire anything to the internal speakers. Many newer TVs have unfiltered class D audio outputs. Absolutely unfiltered , they let the speak inductance do it. Not nice to feed that to an amp. I a ssume they assume that a headphone jack might be used for an amp so it will have the low pass filter on it, but not necessarily the speakers. Imagine, on a TV even costing 2 grand some engineer saved them about a nickel per u nit eliminating that massive (meaning you can almost see it with the naked eye) coil and cap, ON EACH CHANNEL TO BOOT ! He probably got a hundred yuan bonus for that idea. (about $ 15 !)

can run at same time..."

find it on Google, put in brand and model and then "free service manual". Look for links with "electrotanya" in the URL. Once there look at the page and notice where it says "processing" in text. After a minute that changes to "Get Manual" and is the link to the actual download. Don't click anythin g else, it's toolbars, download "helpers" n shit like that. Only that text gets you the manual. I am leery about other sites.

n the headphone jack that mutes the speakers, it is a simple matter of disc onnecting or jumping that out.

. Many newer TVs have unfiltered class D audio outputs. Absolutely unfilter ed,

YES. been there done that...

the speaker drives are unfiltered balanced class D outputs. In order to get the speaker audio into a format suitable for an RCA jack to feed to an external amplifier, I needed small audio transformers and an L C low pass filter. (one for each channel)

Also some TVs do some heavy DSP high pass filtering to the audio they feed to the small internal speakers. Fortunately my TV had a service level me nu to turn that filtering off.

Redneck fix: Microphones near the TV speakers and then connected to the headset transmitter. For the true redneck look you could nail bailing wire snippets to a chunk of wood, curl then up at the end and use those as microphone holders but that has a very low WAF. Black Rustoleum would slightly improve the WAF.

My redneck fix, 40 years ago, for a TV that did not have a remote control, was indeed a 6' long piece of wood.

Push buttons for channels was easy, but it needed a little practice to change volume on a linear slider pot :)

Why not put the mic near the listener? No reason to block other sounds like phone and door bell. Don't they have existing hearing aid like that already? Yes, need one for my mom; so, she won't crank up the tv volume.

Somewhat, they got all kinds of shit now. this was partly done before here. The OPer was asking opinions on a gizmo that actually dynamically adjusted equalization on sound for intelligibility to older ears. Being SED it went to a discussion on how to program the chips to do it and all that, he was looking for someone who maybe had at least tried ones. Everyone else respon ded, as usual. The thread is now buried in obscurity until some newbie Goog ler finds it and regurgitates it to the top.

But a microphone is probably the worst way to do it. It is like trying to r ecord a CD to a tape or PC using mics. It sounds like shit. A direct feed i s the way to go. In fact in the 1970s when they learned that, live recordin gs of rock music got alot better. Works like Peter Frampton - Frampton Come s Alive, Micheal Stanley Band - Stagepass, Bob Segar And The Silver Bullet Band - Double Live Bullet. All of them sound almost as good as a well contr olled studio recording. There are a few well place mics around the auditori um to pick up the crowd and the ambiance, but the main feed is from the mix ing board. Before that it sounded like shit.

Equalizing TV is no trivial matter. I use a manual ten band and going from

-10 dB to +10 dB o the next control is sometimes not enough. That is 31.63 times the voltage gain, 100 times the power to the speaker(s), from one oct ave to the next.

I used to think it was my ears of speakers, but then some shows are fine. t hey sound great. The vocals are very intelligible, the tonal balance in the voices are very good. So if I can hear this why can't I hear that ? I was born in the morning but not this morning. There is something wrong with the sound.

I think I know what it is. They think they can pin a microphone to a person 's belt or something and have the audio come out good. This is simply not t rue, some frequency ranges are missing and there ain't no recreating what i s not there.