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Led back light circuit diagram - Nokia 3110 Cellular Phone

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Nokia 3110 mmc solution

Posted on May 10, 2010

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Hi when i turn on my 47ln5700 flashes for a second and then goes black. I have sound and see images with flash light. I am not sure if its the led power board or some leds in the led pannel gone bad.


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Mar 11, 2017 | LG 47LN5700 47" 1080p Smart TV 120Hz Dual...

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LG 47LN5400-UA LED picture has gone out. Audio works. Using flashlight I can see faint menu image. LED Driver or LED Strips? How can I tell?


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electro-medical.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board..

Dec 23, 2016 | LG 47LN5400 47" LED TV 1920x1080, 120 Hz....

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I have audio and no video. The flashlight test shows I have a picture. The power board does check out ok but I only have 67 volts on the led leads. Is my led board bad or led lights or both?


back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Sep 25, 2016 | Vizio E-Series E470I-A0 47" LED TV...

1 Answer

LED TV screen has flickered momentarily and faded to black. I have sound and power buttons light up. LED solid black, not lit. Bad LED Driver board?


Sounds like Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Jul 16, 2016 | LG Electronics 55LE5400 55LE5400 55 LEDLCD...

1 Answer

No backlights....


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

May 14, 2016 | Vizio E550i-B2 55" LED TV 1920x1080, 120...

1 Answer

Vizio e550i-b2 no led backlight


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board

May 03, 2016 | Vizio E550i-B2 55" LED TV 1920x1080, 120...

1 Answer

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

Apr 12, 2013 | Computers & Internet

1 Answer

Can someone help me a circuit diagram for the apple 23" HD monitor


http://tim.id.au/laptops/apple/displays/cinema_hd_display_23.pdf

May 26, 2012 | Apple A1082 CINEMA DISPLAY 23" LCD Monitor

2 Answers

Tda9380ps /n3/3/1664 using in sharp tv power supply ok ,but no EHT ,the power LED are glowing red light press program key to change green light to return in few miniutes to ...


Tda9380ps /n3/3/1664 using in sharp tv power supply ok ,but no EHT ,the power LED are glowing red light press program key to change green light to return in few miniutes to standby in red light position ,please to help of rectivied this problem and send circuit diagram and IC pin configaration thanking you sir

Mar 03, 2011 | Televison & Video

1 Answer

Wiring diagram for Kawasaki ZX6RR 2004 I want to


Most if not all, blinker circuits, use a standard relay, for 4 light bulbs, devided in two sub-circuits,based upon total current consumption. In other words, to have it working properly, you must always have the same Watts in all bulbs, so as for the current to be strong enough to pull the small electromagnet inside the relay, and make the tik tak. So if you just replace your front blinkers, will be a waste of money, cause either, it will not work, or if you buy the cheapest LED blinkers you can get, you will burn them. My proposal is to buy all four, LEDs, and along with them, replace your relay, with one suitable for LED blinkers. Another option is to get LED bulbs to replace the standard ones, but you got to make sure, they come at the same Watts, as the ones you already have. 99% of such bulbs, are 12Volt/21Watt.

Aug 07, 2010 | 2004 kawasaki ZX-6R

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