Samsung MD55B Backlight Circuit

[dolon]

The LCD panel on the TV is cracked, so decided to salvage for parts.
Real surprised at the neat and simple build, with the single Power Supply board that includes driver for the backlight.
Managed to reclaim all 14 strips with total of 98 LEDs.
It appears that Leds are connected in series and strips are split 4 & 3 in parallel.
The connector is labelled D1+, D1+,S+,S-, NC,NC, D1-, D1-.
Just not sure what S+, S- are as it appears the bank of 3 strips go to those terminals.

[R_J]

Re: Samsung MD55B Backlight Circuit

If you look at the back of the board you will see the two D1+ are connected together, D1- are connected together and S+ & S- are connected together. All the leds are conneted in SERIES.

The S+ and S- are just a way to connect the strings on this model.

This is a simple diagram of how the led strings are connected
The "S" could mean "Series"

[dolon]

Re: Samsung MD55B Backlight Circuit

Thanks so much.
Yes, that circuit is what it looked like from tracing the tracks. I was just not sure about the S+ and S- lines from the Power board.
I will now experiment with the 98 salvaged LEDs to try and find out if there is an application for them.