TV Back-light Spark Gap?

Jul 19, 2012 47 Replies

Jim designs integrated circuits. Do you think you can repair them?

***Once or twice I've chipped back the encapsulation to repair a snapped off pin.

Nope. However, it's possible that he can repair his LCD TV. I just assume that anyone in electronics knows which end of the soldering iron to grab, and how to use a #2 Phillips screwdriver. Tearing apart a 19" LCD TV is easy enough that even and IC designer can do it.

My reading is quite comprehensive.

Ok, so what did I miss, other than it's a Philips 19" TV and something quits after a few hours?

High voltage CCFL inverter arcs

Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

No, he just spends too much time on the repair newsgroup. :)

You patched the package, not the IC itself.

True. The problem is that there currently aren't many interesting repair related topics in the repair newsgroups. So, I thought I would come over to the design group, where the problems are created. If I can't be part of the solution, I might as well become part of the problem.

Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

Some time ago, to aid in diagnosing a prototype chip, we sent it out to have some wires swapped in the chip. Focused Ion Beam, cost a couple thousand bucks to have one chip rewired. The chip worked after that, so we knew what needed to be fixed in the layout.

Jon

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All you guys are forgetting that Jim is pushing a 100 years old! The TV is fine. His hearing aid on the other hand.... :)

Have a nice weekend.

-mpm

I doubt many of the engineers here design consumer electronics.

That's a good portion of my work... cutting costs in _very_ high volume consumer goods... or things aimed at those consumers, like billboard electronics. ...Jim Thompson

| James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.

"Jim Thompson" wrote in message news: snipped-for-privacy@4ax.com...

Ever-self-important Jim Thompson, naturally, counts himself thousands of times over on a simple question. Sadly, he's not great at statistics...

FWIW, right now I'm working on industrial electronics. Not really consumer, much smaller quantities.

Statistically, I predict a power law: 10% of the engineers here account for

90% of the productivity of all engineers here, measured as total number of parts produced. Meanwhile, 10% of the engineers are connected to 90% of all products (by diversity, including myriad low quantity projects).

Some engineers will be well represented by large numbers of small projects, as well as a small number of very large projects; Jeorg and Hobbs are probably nicely representative of this subset.

Tim

Deep Friar: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmoranwms

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No, you have that wrong, he isn't pushing 100, he has been pulling it for some time now.

Jamie

While your IQ has been pushing 40, all your life.

Yep. Much of that has been exported to China. Kinda depressing.

Here's the list of American TV manufacturers:

# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060 # 831-336-2558 # http://802.11junk.com jeffl@cruzio.com # http://www.LearnByDestroying.com AE6KS

I doubt if I'll be buying any more new TVs I have about six working TVs at the moment, and gave away another half dozen a couple years ago. I also have TV tuner cards for several computers.

That used to be common in the communist and probably still is in 3rd world countries where tariffs and other barriers are high- a manufacturer would ship CKD or SKD 'kits' to the target market and the final assembly would take place. Of course the cost was higher, the quality usually also much lower than the originals, but there were some jobs for locals created.

This looks like pretty much the same thing- it definitely does not meet the standard for "Made" in USA. But they can print big flags on the boxes.

"The components will still be made in China for now, with the hope that in time they too will be made in America." I'd be willing to bet that "components" include fully populated and tested PCBs, wire harnesses and such like. It's a bit sad.

Best regards, Spehro Pefhany

"it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com

I have freinds who custom manufacture canopies for art shows. They can get all but one component made in the US. The heavy vinyl they use hasn't been made in the US for over a decade. They are constantly looking for a US source, with no luck. All of the assembly, from raw aluminum to finished product is US made, otherwise. Because of that, they can't claim to be a US made product.

AIUI removing the steering wheel is enough for a car to be imported to Australia as "parts"

Now that there's a market for those components there's atleast a posibility that someone can manufacture some components locally.

?? 100% natural --- Posted via news://freenews.netfront.net/ - Complaints to news@netfront.net

It must be scary to drive there, with some fraction of the motorists driving around without steering wheels.

John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators

Only on starting.

Once struck, the voltage drops (a few hundred), and the PSU goes into constant current mode.

"For a successful technology, reality must take precedence over public relations, for nature cannot be fooled." (Richard Feynman)

Nah! They just import the steering wheel as a separate consignment, this time, quite correctly as "parts".

"For a successful technology, reality must take precedence over public relations, for nature cannot be fooled." (Richard Feynman)

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