DSE XC5592 (Proview 700P)

[PlainBill]

Re: DSE XC5592 (Proview 700P)

One thing strange I noticed with the testing, was that the monitor only seemed to light up from one end (the side the cables are on) Is this just because I was only running one lamp at a time?

I didn't know the life of CCFLs were overrated but I do know that the backlight is one of the weak points of an LCD monitor

Is there any easy way to find what size CCFLs I would need for replacement?

Lighting from one end only indicates the voltage is too low.

Google CCFL backlight. A number of sites selling CCFLs will come up. Some of them have a page indicating proper replacement CCFLs for a few monitors. Other sites are more honest, and admit that the same model monitor may have LCD panels from several different manufacturers and even the same manufacturer may use different diameter CCFLs in the same model panel.

The only way to be sure is to open it up and see.

PlainBill

[Agent24]

Re: DSE XC5592 (Proview 700P)

But the voltage being too low wouldn't cause a false reading?

Then again I guess since the 4th lamp did light up as white then it isn't an issue...or can they light up red on only one end?

I may try to take the LCD apart (and try not to ruin it) and find the lamp size. If I can find a cheap enough replacement then perhaps I will try it.

[Agent24]

Re: DSE XC5592 (Proview 700P)

OK I took the LCD apart (didn't seem too hard, maybe it was a good design ) and removed the CCFLs.

I measured one from end to end (glass only) and they are 346 x 2.2 mm

[Agent24]

Re: DSE XC5592 (Proview 700P)

I just came across this thread again, and realised I had forgotten to finish it!
So for anyone who wants to know what happened:


When I removed the CCFLs, 3 of them were definitely bad, blackened on the ends. Those were the 3 that lit up red in the tests. The 4th was not blackened and still lit up white.

Some time later I bought some new CCFLs on eBay (From CCFLWarehouse) but didn't put them in straight away as I did not have a temperature controlled soldering iron at the time, and I had read that you should keep the temperature low to avoid damaging the lamps.

Eventually I got around to installing the new lamps after I got a soldering station. It was a bit tricky doing the wires and I ended up snapping one of the new CCFLs in the process. Fortunately as one of the old ones was still OK, I just replaced the 3 that were bad and left it at that.

The monitor has been working fine since, with no flickering or any other problems. The only other stupid thing I did was use Kapton tape on the backlight reflector to hold the wires in place, and there are some faint yellow areas on the top and bottom of the screen where the tape gets reflected too. Still, the monitor has a pretty cheap and lame panel anyway and they aren't very noticeable at normal viewing distance so I don't really care. It is worth more to me in terms of practice, and for finding out how easy it is to break CCFLs when your concentration lapses!

It's still running on the original Fuhjyyu capacitors (Yeah, I know) - but I don't use it very often and they are still OK so it's not a high priority. I'll get around to that some day, if the 4th CCFL doesn't die first. I'm still amazed that some Fuhjyyu capacitors outlasted the CCFLs!

Thanks to everyone who helped on this thread, if you're still on the forum and reading this. I learned a lot with this one.