Haier LE55B1381 LED

[tom66]

Re: Haier LE55B1381 LED

Possibly that chip is bad or the panel killed that chip so you'd be taking a risk in replacing t-con.

[bjorkson]

Re: Haier LE55B1381 LED

You can see the burnt mark from the pics.

[bjorkson]

Re: Haier LE55B1381 LED

Ok, let me take a chance and replaced the tcon...thanks for your help Tom, will keep you posted.

[tom66]

Re: Haier LE55B1381 LED

Check voltages before replacing t-con board with ribbons out. That way you can know. Also, you can try checking panel for water damage.

I would be upset to see another bad LCD panel this week, it would have to be the forth, I think.

[bjorkson]

Re: Haier LE55B1381 LED

OK, I will recheck the voltage, is there supposed to have voltage reading on all the test points A to G?

[tom66]

Re: Haier LE55B1381 LED

Expected readings:-

A = 15-16V (AVDD for Panel Source Driver)
B = 15-16V (HAVDD for Panel Source Driver)
C = 20-30V (VGH/VONE for Panel Gate Driver)
D = 1.2V±0.1V (TCON IC Core Voltage)
E = 3.3V±0.3V (TCON IC / Panel Source Driver IO)
F = 1.8V±0.1V (TCON IC)
G = 11V±0.5V (Panel)

[bjorkson]

Re: Haier LE55B1381 LED

Great...Thanks for the info. Yes, was getting 0 reading on 80% percent of the test points. Will order a tcon board and see if that fix the issue. Thx

[bjorkson]

Re: Haier LE55B1381 LED

Tcon board came in yesterday, I replaced and that fix the problem, looks like the bad IC chip on the old board was casing the main issue. Thanks everyone for their help.

[tom66]

Re: Haier LE55B1381 LED

Glad to hear, so not a bad panel...

[bjorkson]

Re: Haier LE55B1381 LED

Yes sir...good panel. I was taking my chance with the tcon board and that fix the issue. Thanks for all your help!

[dspiffy]

Re: Haier LE55B1381 LED

This is the thread that brought me here . . . I assumed this was the amplifier board since the speakers plug into it . . . I'll create my own thread.

[budm]

Re: Haier LE55B1381 LED

This is the thread that brought me here . . . I assumed this was the amplifier board since the speakers plug into it . . . I'll create my own thread.

?????

[dspiffy]

Re: Haier LE55B1381 LED

?????

Well it appeared to have some audio connections and a heat sink so to an old school electronics guy it made sense!

[budm]

Re: Haier LE55B1381 LED

The board in post 1 is the FRC board, nothing to do with audio,
There is no speaker connector.
J6 POWER IN
J4 DEBUG
J8 3D CONTROLLER
J1 SD 7 CLK.
The other 3 big connectors are for LVDS IN and LVDS OUT.
The other pictures are T-CON board.