Polaroid TLX-04244B

[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

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)

[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

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

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

[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

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

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

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

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

[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?

[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

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.

[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

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

[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

Is there any chance that the power supply isn't giving enough power to the inverters, if so how can I check. I also contacted a ebay seller that is selling the inverters and asked if he could tell me the ohms of the transformers

[2011srg]

Re: Polaroid TLX-04244B

They come back as 0.00 Ohms

[tom66]

Re: Polaroid TLX-04244B

So i did the paper thing both boards are buzzing but I can't tell if both or just one of them are doing it

Did you check the fuse on the boards? It's the white object next to the power connector. First; check the zero level of your meter: Set your meter to the ohms range, then touch both leads together. Note the reading and write it here. Then place one lead on one side and the other lead on the other side of the fuse. Report back the reading.