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Are LED strips in a LED TV wired in Series or in Parallel?

Posted by terry tribble on

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Parallel is my guess so they are all the same brightness instead of being dimmer at the end of the string as the voltage dissipates.

Posted on Nov 25, 2021

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USE BRAIN

Posted on Nov 24, 2021

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1answer

GREAT PICTURE AND SOUND BUT ABOUT 6" UP ACROSS THE BOTTOM OF THE SCREEN IS DARKER THAN THE REST OF THE SCREEN. HOW DO I DETERMINE IF ITS A BAD STRIP OF LEDS OR THE LED BOARD??

Inmost of the case,the problem is the LED strips.

To check it, the best way is use a LED tester, if you do not have one, you have to disassembly the LCD panel, unplug the cable between the power supply & the main board, apply the AC power to the TV, you will see the defective strips do not light up.
tip

TV led back-light repair

Tv using power supply unit EAY62810301.

No back-light/sound ok.

No dc voltage measured at P801 led plug.
New board did not fix.
Remove display panel.
With face up, panel will hinge up. (after removing all trim parts) Place folded towels beneath, to prevent strain on tcon ribbon.
Fold other screens up and over on top of display to keep them in right order. Including white background reflector.
Check each series led string with 2*9V batteries and series resistor, minding marked polarity.
Circuit consists of 3 strips of 7 leds all in series.
One bad led disables all .
Check each led of bad string. I used 18V and 1K ohm.
Replace strip or jumper (short) bad led. I just jumpered the bad one that was on edge of panel. (first in string).


http://i.fixya.net25611904-d2havjugub54lsdvnfsaynwf-2-0.jpg

25611904-d2havjugub54lsdvnfsaynwf-2-0_0.jpg
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My LG tv model number 42LN5400-UA no picture

It is a common problem for the LG 42/47 LN series LED TV, the problem is defective LED back lights strip (strips).

You have to open the display panel to find the bad one & replace it. The part number usually is printed on the strips, read 6916L-11XXA, you may purchase it from EBay.
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Samsung LED TV problems

try first with the led strips noo need replacing t-con
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Samsung series 5. 5500 LED TV BLACK SCREEN

perhaps the backlight invertor driver circuit.

Samsung TV Repair Part Number Identification Backlight Inverters LED...
See where the wires from the long LED strips on the both sides of the screen lead you to.

does your model have separate board for backlight ? or is it integrated with TCON ?
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The TV leds arent working

it should be relatively easy to test if you can get at the back of the LED board first Identify if they are series or parallel wired if they are series, if parallel wired there is full voltage across them all and a single burnt out led isn't the issue ( a burned trace could be depending on location). HOWEVER, the most likely problem is the LED driver, as this varies the brightness of the leds in relationship to the brightness setting of the TV. this is usually a part of another circuit.
0helpful
3answers

I need a simple wiring diagram to turn on 40 red leds and 40 green leds on a 9volt battery

Two ways to do it..........

One is a Series circuit, the other is a Parallel circuit.

Of course you can also use a Series/Parallel circuit.

Each LED has a Positive ( + ) connection, and a Negative ( - ) connection.

A) Series circuit:

One side of Switch is connected to Positive ( + ) of the Battery.
The other side goes to the Positive ( + ) of the first LED light.

Then the LED's are connected together in a Series.

Negative of first LED light to Positive of second LED light.
Negative of second LED light to Positive of third LED light.
Negative of third LED light to Positive of Fourth LED light.

And so on, and so on, until you come to No.40 LED light.
It's Negative connects to the Battery.

ONE LED goes bad, and none of them will work.
Old Christmas light strings are set up this way.

B) Parallel Circuit:

Switch to Battery - Positive ( + )
Wire goes from Switch, to 1st LED light's Positive connection ( + )
Then wire from 1st LED positive, to 2nd LED Positive ( + )
Then wire from 2nd LED Positive to 3rd LED Positive.

And so on, and so on, until you reach the 40th LED.

Then wire comes from Negative ( - ) of Battery, to Negative of 1st LED.
Wire from 1st LED to Negative of 2nd LED.
Wire from 2nd LED to Negative of 3rd LED.
Wire from 3rd LED to Negative of 4th LED.

And so on, and so on, until you reach 40th LED.
Wire connects to Negative of 40th LED. Then a wire connects from 40th LED Negative, and goes to Negative of Battery.

http://en.wikipedia.org/wiki/Series_and_parallel_circuits

Series Circuit;

http://en.wikipedia.org/wiki/File:Series_circuit.svg

Over to the Left side you see the Battery symbol. There is no switch in this circuit.

In the Battery symbol, the Longer line represents the Positive pole.
(Positive connection)

Resistors are represented by the squiggly lines. In place of them put your LED lights.

A Switch would go in-between the Battery, and first LED light; on the Positive side.
(ALWAYS put the Switch on the Positive side. Can explain in detail if you need)

[The Top line in the diagram, is the Positive 'wire' ]

http://www.autoshop101.com/trainmodules/elec_circuits/circ114.html

Parallel Circuit:

http://www.autoshop101.com/trainmodules/elec_circuits/circ122.html

In a Parallel circuit, if one LED light goes out, the rest stay on.

For additional questions please post in a Comment.
Regards,
joecoolvette
0helpful
1answer

How do i install 2 ckicker cvr to my amp

Here are a couple of diagrams 2+4 ohm dual voice coil wiring.

Option 1 (parallel/parallel) = 1 ohm load
Voice coils wired in parallel, speakers wired in parallel
Recommended Amplifier: Stable at 1 ohm mono 2_4ohm_dvc_1ohm.gif
Option 2 (series/parallel) = 4 ohm load
Voice coils wired in series, speakers wired in parallel
Recommended Amplifier: Stable at 4, 2, or 1 ohm mono 2_4ohm_dvc_4ohm.gif

Option 1 (parallel/parallel) = 0.5 ohm load
Voice coils wired in parallel, speakers wired in parallel
Recommended Amplifier: Stable at 1/2 ohm mono 2_2ohm_dvc_05ohm.gif
Option 2 (series/parallel) = 2 ohm load
Voice coils wired in series, speakers wired in parallel
Recommended Amplifier: Stable at 2 or 1 ohm mono 2_2ohm_dvc_2ohm.gif
Option 3 (series) = 8 ohm load
All voice coils wired in series
Recommended Amplifier: Stable at 4, 2, or 1 ohm mono 2_2ohm_dvc_8ohm.gif
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1answer

How do i hook up kicker solo baric in the box

Option 1 (parallel/parallel) = 0.5 ohm load
Voice coils wired in parallel, speakers wired in parallel
Recommended Amplifier: Stable at 1/2 ohm mono 2_2ohm_dvc_05ohm.gif
Option 2 (series/parallel) = 2 ohm load
Voice coils wired in series, speakers wired in parallel
Recommended Amplifier: Stable at 2 or 1 ohm mono 2_2ohm_dvc_2ohm.gif
Option 3 (series) = 8 ohm load
All voice coils wired in series
Recommended Amplifier: Stable at 4, 2, or 1 ohm mono 2_2ohm_dvc_8ohm.gif Option 1 (parallel/parallel) = 1 ohm load
Voice coils wired in parallel, speakers wired in parallel
Recommended Amplifier: Stable at 1 ohm mono 2_4ohm_dvc_1ohm.gif
Option 2 (series/parallel) = 4 ohm load
Voice coils wired in series, speakers wired in parallel
Recommended Amplifier: Stable at 4, 2, or 1 ohm mono 2_4ohm_dvc_4ohm.gif
0helpful
1answer

How do i install my L5 solo barics to a 2 channel amp if there is only one connection on the enclosure next to the vent? If I bridge the amp to 1x1000W will the power distribute evenly between both...

Option 1 (parallel) = 2 ohm load
Speakers wired in parallel
Recommended Amplifier: Stable at 2 or 1 ohm mono 2_4ohm_svc_2ohm.gif
Option 2 (series) = 8 ohm load
Speakers wired in series
Recommended Amplifier: Stable at 4, 2, or 1 ohm mono 2_4ohm_svc_8ohm.gif
Option 1 (parallel/parallel) = 1 ohm load
Voice coils wired in parallel, speakers wired in parallel
Recommended Amplifier: Stable at 1 ohm mono 2_4ohm_dvc_1ohm.gif
Option 2 (series/parallel) = 4 ohm load
Voice coils wired in series, speakers wired in parallel
Recommended Amplifier: Stable at 4, 2, or 1 ohm mono 2_4ohm_dvc_4ohm.gif Option 1 (parallel/parallel) = 0.5 ohm load
Voice coils wired in parallel, speakers wired in parallel
Recommended Amplifier: Stable at 1/2 ohm mono 2_2ohm_dvc_05ohm.gif
Option 2 (series/parallel) = 2 ohm load
Voice coils wired in series, speakers wired in parallel
Recommended Amplifier: Stable at 2 or 1 ohm mono 2_2ohm_dvc_2ohm.gif
Option 3 (series) = 8 ohm load
All voice coils wired in series
Recommended Amplifier: Stable at 4, 2, or 1 ohm mono 2_2ohm_dvc_8ohm.gif
Option 1 (parallel) = 2 ohm load
Speakers wired in parallel
Recommended Amplifier: Stable at 2 or 1 ohm mono 2_4ohm_svc_2ohm.gif
Option 2 (series) = 8 ohm load
Speakers wired in series
Recommended Amplifier: Stable at 4, 2, or 1 ohm mono 2_4ohm_svc_8ohm.gif
Option 1 (parallel) = 2 ohm load
Speakers wired in parallel
Recommended Amplifier: Stable at 2 or 1 ohm mono 2_4ohm_svc_2ohm.gif
Option 2 (series) = 8 ohm load
Speakers wired in series
Recommended Amplifier: Stable at 4, 2, or 1 ohm mono 2_4ohm_svc_8ohm.gif
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