CCFL with bulging Rubycon

[Behemot]

I was working on laptop and than the light upon my head turned off. The CCFL installed there was pretty hot, I dissasembled it and found slightly bulging Rubycon BXA. No wonder looking at the fried board...main problem is probably the PTC C890 which is now popped in half. Semiconductors look fine, but the transformer-looking thing is shorted (diode test indicates 3 ohms between two legs and 0 between others). Is it normal? From what I know about CCFL, it has only inductor no transformer actually...

I guess the PTC is positive thermistor, the C890 means 890 ohms? Also is there some 125 degrees cap I can use instead of the Rubycon (4,7 uF)? I was also thinking about ceramic caps. Could it work with it? It shouldn't have temperature problems I guess.

[Behemot]

Re: CCFL with bulging Rubycon

So I've yahooed for the PTC thermistor and it's overcurrenct protection one with 150 ohms.


I even succeded in finding one here in the nearest city! Awesome...

[Th3_uN1Qu3]

Re: CCFL with bulging Rubycon

You're lucky. I spent months looking for a PTC for my mom's Samsung TV (they use those in the degaussing circuit) till i decided to junk a little 15" monitor and got the PTC out of it. Only to find out that the original one was actually fine, because even an external degauss coil i tried later wouldn't help the miscolored corner on the bottom right of the set. As soon as the coil was taken away from the TV, the colors would go bad again.

It turned out to be a permanent magnetic field in that spot where the TV is placed, which was corrected by putting a magnet from a 8" woofer on a shelf at the bottom right of the TV.