Polaroid TLX-04244B

[tom66]

Re: Polaroid TLX-04244B

0 ohms is good for a fuse.

Is there any chance that the power supply isn't giving enough power to the inverters, if so how can I check.

Yes, that's a possibility, although less likely. Set your meter to the 200V DC range and probe the pins corresponding to the red and black wires on the connector, while turning the set on. I think you should measure about 24V +/- 1V either way.

Could also be a bad bulb, but it looks like the bulbs will be a real bugger to replace.

[2011srg]

Re: Polaroid TLX-04244B

Yea i do get 24v, is there anything I can do to test the bulbs

[2011srg]

Re: Polaroid TLX-04244B

So I think i'm going to go ahead and buy a new master inverter, and see what happens the buzzing is worse on there than the slave

[2011srg]

Re: Polaroid TLX-04244B

So I went ahead and order the parts from RetechTV.com, it cost $94 for both inverter boards. If this isn't it I think i'm going to try getting a new power supply. And if anybody could help me find a Manual and a disassembly guide that would be appreciated.

[cadiman]

Re: Polaroid TLX-04244B

That is most likely an au-optronics panel. It consists of a master and slave inverter.

Mosfets on the slave short out and can be caused by one or two bad ccfls.

Very common on this type of panel.

Do not replace the inverters until you inspect the ccfls.

[2011srg]

Re: Polaroid TLX-04244B

Ok so I got to the lights looks like 1,3,8,9 needs replaced, does anyone know were I can buy these bulbs at?

[2011srg]

Re: Polaroid TLX-04244B

Will these lights work?
http://www.lcdparts.net/ccfldetail.aspx?ProductID=3669

[2011srg]

Re: Polaroid TLX-04244B

Ok so I found a deal on ccfls, do you think these will work on this t.v, Please let me know ASAP! Thank You
http://www.ebay.com/itm/Aoc-42-W-LCD...#ht_1794wt_895

[2011srg]

Re: Polaroid TLX-04244B

Oh yea also do this mean I would also have to replace the slave as cadiman said (Mosfets on the slave short out) does this mean the slave is DONE?

[2011srg]

Re: Polaroid TLX-04244B

So you were right it has 4 bad bulbs out of 18. Do you know anywhere I can buy these?

[2011srg]

Re: Polaroid TLX-04244B

The part number on the bulbs are FM14 but I have no clue were to get them

[2011srg]

Re: Polaroid TLX-04244B

I called the company and they were no help. I'm sure its the bulbs there 955mm long I haven't found the diameter yet.

[tom66]

Re: Polaroid TLX-04244B

I'm not convinced that four bulbs have failed. These inverters shut off when one bulb dies so no further failures should happen.

There's a simple test for this, though.

With power off, carefully swap a "faulty" CCFL for a working one. See if the CCFL in that position lights up. Do not change them around when the set is on as you will get a nasty shock (~3,500V) although as this is AC it dissipates almost instantly so no harm once unplugged.

[2011srg]

Re: Polaroid TLX-04244B

I did what you said and there's only 3 out I thought i seen four but it is flicking. But the same three are out after I moved them. They also have black spots on them. I'm having trouble still trying to find replacements. I think i'm going to put the AOC or Sony ones in after i fond out the diameter of the bulbs.

See early I was messing around with the bulbs and put them back in there was a little light and the t.v stayed on longer than it has been at least a min or longer. But now there no light what so ever in the three bulbs.
__________________________________________________________________________
How much wood could a woodchuck, chuck if a wood chuck could chuck wood?

[tom66]

Re: Polaroid TLX-04244B

Well, I'm surprised. I've never heard of three bulbs simultaneously failing. Have you tried measuring their diameter?

[2011srg]

Re: Polaroid TLX-04244B

Yea I not sure how, I also was told that it will let two go out before it shut them down, not sure if thats true? The diameter is about 3.40 on the bulb and on the end (solder point) 3.4 I did't know what one it would be. So the bulb is 955mm (long) - 3.40mm (diameter)

[cadiman]

Re: Polaroid TLX-04244B

I have replaced the ccfls from another of the same size (42 or 32 etc).

I soldered mine in because the ends were smaller.

I replaced all of them from another panel. (even light)

You can do the same. Some are plug in and some are soldered.

Any ccfls with dark spots are bad.

[2011srg]

Re: Polaroid TLX-04244B

So I got home today and truned on the t.v so I could see the bad bulbs and it truned on but the light slowly shut off from right to the left and I started smelling something like electrical components burning. I immediately unplugged the t.v and inspected it and found this. So do you think the master board is bad now or what could have caused this, i;m kinda scared to plug it back.

[2011srg]

Re: Polaroid TLX-04244B

Ok so i'm talking to this ebay seller that sells cccfl's and eefl's. He said I should put eefl's in. But how do I know for sure what I have now? I posted a picture of the eefl he sent me. And the other picture is what I have now.
Here the EEFL it would't upload here. http://s1212.photobucket.com/albums/...nt=TheEEFL.jpg

[tom66]

Re: Polaroid TLX-04244B

So I got home today and truned on the t.v so I could see the bad bulbs and it truned on but the light slowly shut off from right to the left and I started smelling something like electrical components burning. I immediately unplugged the t.v and inspected it and found this. So do you think the master board is bad now or what could have caused this, i;m kinda scared to plug it back.

You might have a bit of conductive dirt where the connector is. I don't think the board is damaged. Use a needle or small pin to scrape off the carbon residue and clean the "wound" and plug it in again. It won't start a fire.

Ok so i'm talking to this ebay seller that sells cccfl's and eefl's. He said I should put eefl's in. But how do I know for sure what I have now? I posted a picture of the eefl he sent me. And the other picture is what I have now.
Here the EEFL it would't upload here. http://s1212.photobucket.com/albums/...nt=TheEEFL.jpg

Use CCFLs. EEFL might not be compatible.