I have been running across a lot of laptops and monitors lately
which appear to have bad CCFL tubes. a lot of these seem to have
similar connectors.

I have been thinking of constructing some kind of test ballast
so i can attempt to power up the tubes to see if its the tubes
or the ballast that is bad. Researching some replacement bulbs
for laptops,there seems to be a lot of different tube types.

Anybody got any ideas on how to build one?
Does it need variable strike and run voltages just for test
purposes?

What i want to do is put the tester on the bulb socket at the ballast
and power up the bulb to see if it lights ok before completely
dismantling the LCD which can be a real pain on some of them.

bob


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On Fri, 26 Dec 2008 11:07:57 -0600, bob urz put
finger to keyboard and composed:

I have been running across a lot of laptops and monitors lately
which appear to have bad CCFL tubes. a lot of these seem to have
similar connectors.

I have been thinking of constructing some kind of test ballast
so i can attempt to power up the tubes to see if its the tubes
or the ballast that is bad. Researching some replacement bulbs
for laptops,there seems to be a lot of different tube types.

Anybody got any ideas on how to build one?
Does it need variable strike and run voltages just for test
purposes?

What i want to do is put the tester on the bulb socket at the ballast
and power up the bulb to see if it lights ok before completely
dismantling the LCD which can be a real pain on some of them.

bob

I don't know how this in-circuit CCFL tester (HR-TL1040) works but ...

"HR ELECTRONICA launches the first CCFL tester lamp (sic) for LCD TV"
http://www.hrdiemen.es/products/eng/...icies.php?id=3
http://www.hrshop.es/index.php?comma...oduct&id=73211
http://www.dalbani.co.uk/catalogue/p...s.php?id=31896

Cost is 80 Euros (USD112).

- Franc Zabkar
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