LG 55LB6500 - Dim Logo - Getting Ready for New Backlights

[Renovator]

From my reading, this LG looks like so manty others, with the slightly visible logo at power on.
I'm pretty sure the metal back is coming off so I can replace ailing backlights.

I thought I'd go ahead and post up, since this model didn't search here.

Here's the 20 pin voltages:

GND
11.8
11.8
GND
23.8
GND
3.4
3.4
3.3

Evens
GND
23.9
11.8
23.9
2
3.4
2
3.3

The big cap is 395 VDC.

There are 2 pairs of LED leads at P801.

With P801 connected:
Pin 7 LED+ 207
Pin 5 LED- 26.8
Pin 3 LED+ 138
Pin 1 LED- 18.8

With P801 disconnected:
Pin 7 LED+ 90
Pin 5 LED- 0
Pin 3 LED+ 90
Pin 1 LED- 0

The voltages don't spike at P801 when powered on, and connected.

I guess we'll see what needs replacing after I get to the strips.

Or are those voltages pointing to something else?

[neilc6]

Re: LG 55LB6500 - Dim Logo - Getting Ready for New Backlights

You should do a full replacement of all strips. The LB's use a thicker style lens and the double sided tape is super strong. The lenses can also fall off/get loose with age and will definitely come off when removing the strips. Trick is to use a scraper to remove but tap the handle with a rubber mallet.

[Renovator]

Re: LG 55LB6500 - Dim Logo - Getting Ready for New Backlights

I appreciate that.

My thought was investigating compatible new strips, and not getting hung up on delivery times.

The way these guys have been failing, I don't feel like playing the risk with pre-owned.
____

From my other work I have a fairly complete line of solvents. I'll start out with the light stuff and move up the column.