ccfl tube replacement

[t-shooter]

I recently tore apart a Dell E173fpb 17" lcd display and discovered that one of the four backlight tubes was hooched.

From searching around on the internet, I see it's hard to get much info on the exact specs of these things. I found what looks like a close match for the one I need, but I want to be sure to get the right one as far as starting and runing voltages are concerned. Does anyone know what theses voltages are?

Has anyone replaced on of these lamps on one of these displays? If so, do you have a part number and source where you purchased it from?

It looks like this is the only problem with this display and it would be a shame to toss it out. Any help would be most appreciated.

[PlainBill]

Re: ccfl tube replacement

I recently tore apart a Dell E173fpb 17" lcd display and discovered that one of the four backlight tubes was hooched.

From searching around on the internet, I see it's hard to get much info on the exact specs of these things. I found what looks like a close match for the one I need, but I want to be sure to get the right one as far as starting and runing voltages are concerned. Does anyone know what theses voltages are?

Has anyone replaced on of these lamps on one of these displays? If so, do you have a part number and source where you purchased it from?

It looks like this is the only problem with this display and it would be a shame to toss it out. Any help would be most appreciated.

There are no 'standard' sizes for backlight tubes. As far as I can figure it, the two variables are the diameter and the length. A Google search for CCFL backlight will pick up several suppliers, as will a search on eBay.

The cheapest source may be a defective monitor.

PlainBill

[t-shooter]

Re: ccfl tube replacement

Thanks for the reply, but as I mentioned in my post, it's the voltages I'm concerned with. Won't applying too high or too low a voltage to replacement cause problems?

[PlainBill]

Re: ccfl tube replacement

Thanks for the reply, but as I mentioned in my post, it's the voltages I'm concerned with. Won't applying too high or too low a voltage to replacement cause problems?

Checking a few suppliers, the operating voltage seems to be determined by the length and diameter. Even that is minor. A 2 mm x 430 mm backlight is rated for 1050 V @ 5 ma. A 2.6 mm x 430 mm backlight is rated at 886 V @ 5 ma. A 30% in crease in diameter (70% increase in cross sectional area) results in a 16% decrease in voltage.

PlainBill