LED bACKLIGHT

[Brigadier]

Hello all,


Toshiba 32W1333DB telly.

Vestel gubbins inside.

I presume the (2 strips of) LED backlighting are 12v DC?

If so, can they be replaced by any generic LED striplighting of the same voltage? Like this as an example>

If not, why not?


Thanks in anticipation

 

[winston1]

Don't assume anything. Your example is warm white. Pretty sure that is not right for LED backlighting even if the voltage is right.

 

[Brigadier]

Thanks Winston.

In principle though, is cool white sound?
Are they all 12v dc, or are they not?

 

[ericmark]

Thanks Winston.

In principle though, is cool white sound?
Are they all 12v dc, or are they not?

No they are not, a LED is a current dependent device, there is a voltage across them, 1.2 volt for red, and 3 volt for white, but it is current that matters, so some where some how a driver is included, this may be a simple resistor, or capacitor, or a complex switch mode device. To make a decoration a simple resistor is often used, so three LED's and a resistor from a 12 volt supply is very common, but where used to light an area the resistor is very wasteful so a switch mode driver is used, so voltage or current you find out by reading the instructions. There is no standard.

 

[winston1]

I believe LED backlighting in TV's is lots of LEDs in series. Failure is usually just one LED. It is possible to identify the culprit (with the power switched off) with a multimeter. Having done that a quick bodge is to bypass the one in question with a link.