how to test lcd led backlight?

[ReeceyBurger123]

Re: how to test lcd led backlight?

Don't be upset guys........Be gay................... I .....I mean joyful.....Its friday

That quote just made my day a whole lot worse, what are you even on about :L

[electrica]

Re: how to test lcd led backlight?

I think you need to get know about tunnel diode:
Tunnel diode – semiconductor diode characterized by a small thickness of the pn junction, a very high concentration of dopants on both sides and a negative dynamic resistance for a certain range of polarizing voltages. It was invented in 1957 by the Japanese physicist Leo Esaki (hence sometimes it can be named Esaki diode). During research on semiconductor junctions he noticed their thus far unprecedented feature based on the tunnel phenomenon. This phenomenon causes charge carriers move through the narrow barrier layer at a very low voltage.
from here: http://911electronic.com/tunnel-diod...ol-definition/

[keeney123]

Re: how to test lcd led backlight?

Computer Recyclers are not in it for the money. They are in it to help reduce waste and help educate others. Of course they have to make money so they can live. This computer I am using came from Interconnect in Seattle, a recycler. BudM is right that this thread is about LED string testing. It would be good if the other items mentioned in this string could be converted to another thread dealing with those things because if I was a person look for how to test LED strings in a TV I would not have to go all through all of the extra stuff in this thread.

[Peter Chiu]

Re: how to test lcd led backlight?

One of my friends, he specialized in computer recycling.... resale mother boards.... HDDs...... because the tablet so popular... from 40 employees to close down ....It's a sad story .....I just small guy, I load the stuffs to more upper guy over Phoenix...I don't sell anything to ebay......I do it locally only ......I love junk.....I always think how to reuse them.... specially... like TV back plastic ....nobody want them........gonna have a way to recycle..that...
The commercial damper I ask the city did they recycle them. I been told by one of the truck driver ....He say NO...they drived straight to landfill....and city pay $250 each load to Indian reservations ....That's a shame...

From I heard , CA charge every TV $40 bucks for per-recycling is that true....

If I did what U saying ,which I could,I would make more than what i did now..........need to work.......see U......

[budm]

Re: how to test lcd led backlight?

'e-recycler' oooo impressive and that's all?
I have been doing volunteer works one day a week since 1995 and we do more than just recycle:
And what do you do to give back to the communities with millions you guy are making to put in your pockets?
Do you send the 'JUNK' to China and India so they can pollute their own countries (most of the so called E-RECYCLE do that, we do not)?
Are we supposed to be impressed by that?
Do you want to brag then read below.

http://www.crc.org/about/crc_history.php

CRC History
"In 1991 no one had heard the term 'Computer Recycling'"
In 1991 (and before CRC) a Silicon Valley high-tech company was down-sizing and giving up two 20,000 sq. ft. warehouses. These warehouses were packed with computer equipment one and two models old. There was active outreach on the phone for 8 hours a day to schools and nonprofits for the next 2 weeks, informing that these computers were available. Ten years ago no one ever heard the term "Computer Recycling" and there was no immediate response. The warehouses were emptied and a scrap company hauled the stuff away. Our Founders - Wil Marshman , Mark Hass, and Steven Wyatt - were having dinner together, and Mark (who worked for the down-sizing company) suggested starting a program to reuse old computers. Before the end of the evening, the three men committed to starting a nonprofit organization to keep computers out of our landfills, and started the conversation about rerouting computers to schools/ nonprofits. Our first motto was "Reusing Computers to Educate America.
The Computer Recycling Center in California was the first full-service collection, reuse, and refurbishment organization in the USA. In 1992 we received a grant from the David and Lucille Packard Foundation allowing full-time operation, and moved into larger quarters. We are fortunate to receive newspaper, magazine, and TV coverage on a continuing basis. From the beginning CRC was set up as a model, to provide the incubation of ideas and to collect, move, test, refurbish, and re-distribute an avalanche of cast-off computers (different makes, models, in all kinds of conditions, or even in no condition at all!). Here is where we had fun. When you're starting from scratch, something new and exciting for the first time, you have to make it all up! There were no wrong answers, only better ones.
In 1994 we added a training program, became state-licensed, and our courses were state-certified. We worked through the private industry council and the Employment Development Department to provide career training and technical job skills. In 1996 we participated with the State of California "Refurbished computers program". But we still had some problems. One: getting people to accept a "recycled computer"; Two: making sure that businesses would know that our highest priority with used equipment was finding REUSE, and not just "grinding up" or "melting down" the computers. So we started the Computers & Education REuse and donation program. Each of our program names say exactly what we do. Computer Recycling Center™ keeps the items out of the landfill, and Computers & Education refurbishes the computers, and provides community and after school training programs.
In 1998 CRC started supplying the California Department of Corrections with computers to refurbish, and partnered with Joint Venture Silicon Valley's "Smartschools" program. Our new motto is "Reuse the best and recycle the rest™".
At our facilities and programs we give tours, participate in conferences, and we have provided information, thoughts, and ideas to private and government organizations from states in the USA, and countries including Canada, UK, and Japan. Each started successful model programs. We continue to be a full-service organization, keeping in-touch with each area of Computer Recycling and Computer Reuse, and continuing to be an active partner in local community programs.

[Peter Chiu]

Re: how to test lcd led backlight?

Like my little brother ....Jimmy, I have Electronic reclamation business for 20 years,...........

In other words..........////////////////////// JUNK business //////////////////........better name..... e-recycler....

2007 he hired his brother to work in his garage with him....
2009 reached $2.6 million
2011, America’s Most Promising Companies...... fastest-growing private companies

Growth rate: 161.12%
2011 revenue: $7,958,348
2012 revenue: $15,018,465
2013 revenue: $20,780,521

Now he gonna shoot for..............A Billion Dollar business.....

I studied him.... for a long time....still can't catch a bit .....
He just like a bird fly into sky.......https://www.youtube.com/watch?v=oUPdG4DA42g

I am not here to ask any money!.......but.....H..O....W.......

Oh I forget this Re: how to test lcd led backlight?
I always talk to my techs who could not fix the TV.....If I am shopjimmy with all parts he had....... I fix all the dogs.....tech answer.... ^%#$%& ....

[Peter Chiu]

Re: how to test lcd led backlight?

Thanks........I will ...

[budm]

Re: how to test lcd led backlight?

BTW, there are many details that left out, for examples, the type of capacitors, what to look for in the cap spec, what do those spec of the cap means, what is ESR spec and the impedance spec, etc. You need to know how to read spec sheet to get the correct type of caps for the circuits you are working on but then you need to know what kind of circuits you are dealing with in the first place.
If you want to do education, then you need to provide more info.

[budm]

Re: how to test lcd led backlight?

Just go here and click on 'NEW THREAD':
https://www.badcaps.net/forum/forumdisplay.php?f=29
To start a new thread about electronics theories.

[Peter Chiu]

Re: how to test lcd led backlight?

why don't you start a new thread dedicate to that,......
I never open a new thread before .....[how to test lcd led backlight?].....and I like to hiding here...because some of the top secretes, I don't want to share to the World, only to Badcaps Veterans who developed the times and life's here.

[Peter Chiu]

Re: how to test lcd led backlight?

Jimmy Vosika:
“Is it a half-a-billion-dollar market a year? Probably. Is it a billion? Could be. I’m not sure. There’s so many unknowns. There’s so many customers out there that are looking for TV parts,” he adds. “We have not figured out the ceiling on this market yet and we’re not even close to it.”

[budm]

Re: how to test lcd led backlight?

Again, enough of these Electronics theory, why don't you start a new thread dedicate to that, it is not the subject for this thread the original OP had started with.

[budm]

Re: how to test lcd led backlight?

Why use the scope when you can use the meter instead, all you are doing is measuring the AC Voltage across the cap. The generator can be simple 555.
Lugging around scope and function generator and the calculator?
http://s807.photobucket.com/user/bud...?sort=3&page=1

[budm]

Re: how to test lcd led backlight?

Selling many replacement boards for many TV brands is not the same as selling tester for testing LED.
Look at the cloned Chinese $20 meter you bought, is it Billion dollars?

[Peter Chiu]

Re: how to test lcd led backlight?

6.CAPACITORS
Capacitors block DC voltages and pass AC voltages. They are used as filters, AC coupling capacitors and as by-pass capacitors.
A capacitors value C (in Farads) is dependent upon the ratio of the charge Q (in Coulombs) divided by the V (in volts).

When put Capacitors in series
C=1/(1/C1+1/C2+1/C3.......)
//////////////////////////////// beginner see U next time //////////////////////////////////////////

For Cap Veterans:
{Go to ….A Simple Way to Test Capacitors..... Build A Stand Alone Cap Tester.}

That's out of date........ Guys don't bother with that........Obsoleted....

I really don't know what they're talking about............. the most easy & educational way is use scope's x and y inputs......

Electrolytic conductivity
https://www.youtube.com/watch?v=uUhBEufepWk
Capacitance
https://www.youtube.com/watch?v=ngOC4eUQl8Y

GOOD…... I love this guy...... You can be my wingman anytime (Top Gun).....and.......I have exactly same Tektronix 465B 100 MHz Dual Trace Oscilloscope......

.......................The best ESR meter in the world?...................

Measure Capacitor ESR with an Oscilloscope and Function Generator
https://www.youtube.com/watch?v=115erzCCxgE

Basics of Lissajous Patterns on an Oscilloscope
https://www.youtube.com/watch?v=t6nGiBzGLD8
Simple Component Tester using Oscilloscope - Octopus Curve Tracer
https://www.youtube.com/watch?v=Gwo3pEH7hUE
Lissajous curve has more fun...and I love't.......
http://en.wikipedia.org/wiki/Lissajous_curve
http://en.wikipedia.org/wiki/Lissajous_orbit

give yourself a treat

Hozier, Annie Lennox - Take Me to Church / I Put a Spell on You (Medley) (57th GRAMMYs)
https://www.youtube.com/watch?v=HZEChv1AaOk

[Peter Chiu]

Re: how to test lcd led backlight?

Don't be upset guys........Be gay................... I .....I mean joyful.....Its Friday......

It's still........................ A Billion Dollar business...............

JeffJ.... have been giving them to good will ( God bless U).... sale all the collection of Ur Panny boards on ebay , Sale all Repair KITs (from all your experiences)..... you can came up with.......Yes, it's gonna fade away. look ..... all the DLP light engines I had brand new in the the box......brand new projector RCA TV blue tube ....my tears fall down....I don't know what to do with that....... most let my heart broken is all the Sam's photofact and manufacturer's service manuals 6 cabins data books dump in trash .......https://www.youtube.com/watch?v=tH2w6Oxx0kQ

I have 20 panny's TVs............... none of them are the same.....And never see it again....already become obsolete model............a meat grinder .........Yesterday, I went to Costco, look 50' Vizio LED TV(with 2nd year warranty), Hard to believe is 50' TV ....so thin and light,.....no frame...I mean all is screen...look smaller than old TV......For under $500.00 .....I almost buy one..........But I smiley look at 80' LED TV....

.............................Is it a billion dollar market a year?

Jimmy Vosika sales reclaimed TVs at his own MN Home Outlet.

ShopJimmy.com started<<<<<< home improvement retail outlet,>>>>>> MN Home Outlet, in 2014. MN Home Outlet sells home appliances, lawn and garden, tools and building materials direct from a major home improvement retailer at 40-90% off retail.

Refrence:
1: August 1, 2010 his father-in-law’s appliance recycling company
http://tcbmag.com/Honors-and-Events/...r/Jimmy-Vosika.............................


2: January 31, 2014 Is it a half-a-billion-dollar market a year?
The story of ShopJimmy.com, the hobby that became a $22 million business........................

http://tcbmag.com/Industries/Technol...opJimmy-Method


3: Oct 24, 2014 Fast 50 No. 10: ShopJimmy.com

http://www.bizjournals.com/twincitie...jimmy-com.html

[JeffJ]

Re: how to test lcd led backlight?

I got my 9G Kuro so I'm happy, keep looking out for a ZT/VT60 as a possible final upgrade until OLED.

I've fixed about a dozen 42 inch Pannys Plasmas now and have been giving them to good will or friends. Every one just loves the picture quality on them. Sad to see Plasmas go. Cannot beat the black levels. Sure LEDs are getting better but still.

I have quite the collection of Panny boards now too. It seems like every Panasonic i come across that doesn't have a cracked screen needs SC or buffer work. SC 90% of the time.

[tom66]

Re: how to test lcd led backlight?

I got my 9G Kuro so I'm happy, keep looking out for a ZT/VT60 as a possible final upgrade until OLED.

[JeffJ]

Re: how to test lcd led backlight?

Shame, I love my Dumpster TC-P55GT30. Wish i could get another.

[tom66]

Re: how to test lcd led backlight?

Plasma died about 6 months ago. This technology is dead. It has gone to meet it's maker. It is an EX-TECHNOLOGY!!!