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CCFL Power Supply Help (electronics guys only!)

post #1 of 3
Thread Starter 
Okay, so I got an 'el cheapo CCFL kit. It works, but one tube has trouble lighting. To get it to work I have to disconnect the bright tube, wait for the dim tube to fully light, then reconnect both. This must be done every time the power is cycled for it to work right.

I have lots of time and nothing better to do, so I want to fix it

Here is a pic of the controller board and my educated guess as to what it does.



Any ideas what could be causing such behavior? I have my soldering iron and lots of various components from other power supplies ready
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post #2 of 3

is it the same cathode that is dim or the same port from the transformer. Because my guess is that it is a faulty cathode before the electronics being faulty judging by the conditioning to get them both bright.
Bad Argon/Neon-phosphor balance in the cathode would make it hard to power up.
    
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post #3 of 3
Thread Starter 
Quote:
Originally Posted by HE_WHO_IS View Post

is it the same cathode that is dim or the same port from the transformer. Because my guess is that it is a faulty cathode before the electronics being faulty judging by the conditioning to get them both bright.
Bad Argon/Neon-phosphor balance in the cathode would make it hard to power up.
It's always the same cathode that's hard to power up. I checked it out and they look the same but... you could be right.
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