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Testing CCFLs
Keith:
Hi Les,
Just download the data sheet for the BIT3106, you can then try different ways of bypassing the protection. It is preferable to use a board with only 1 control chip and several drivers, as you will have to bypass each chip.
Try to find a board using an OZ694 type chip.
Keith
Keith:
Les,
Finally my CCFL tester arrived from Singapore, it has had a nice trip around the world to get here! A few quick tests and it will light 300mm, 900mm from a 40" screen and a U shaped from a 26" that is 1200mm full length. To be honest it is much easier and quicker to use than a modded board and for a tenner well worth it. Also safer than a modded board, with all that HV waiting to bite you.
Ebay item 150948891826
Keith
OldLes:
Kieth, I have not given up on trying different methods yet, but I have taken the hint.
Unit just ordered. Very busy on the 'bike right now, so whether or not I "play" any more before the tester arrives, we shall see.
Les.
Keith:
Hi Les,
You will need to check the croc clip on the ground lead, it will probably need soldering as it is just poorly crimped.
I don't fix many TVs, mostly other electronic or electrical items, but this little tester will make it easier to test the lamps.
Keith
OldLes:
Well, my little tester arrived last week, and I found time to play with it this afternoon. (Kieth, quite right, the croc clip needs soldering to get continuity. Other than that it seems well put together). I tried the three suspect tubes I removed from the 42" Sharp, and of course they tested out OK!!!!
I also checked the tubes in the 32" sharp sitting patiently on the bench, and all seem OK, but not as easy to test in the set as loose on the bench. I want to test a few more, preferably some known (definitely!!!!) faulty ones, as well as more of all sizes.
I have powered it from my bench supply, at the stipulated 12v, and it seems to draw current according to the tube length, but too soon to be definitive.
Les.
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