vkjohnson Posted December 10, 2011 Share Posted December 10, 2011 I have one brand-new built CTB card that has power problem. When I plug it in at first, the LED did not light up and it had no power. I jiggled it around a bit while it was still plugged in and it finally powered up. Once it does power up, it never loses it and communicates fine with the computer. If it is ever unplugged though, it needs another jiggle to get it back to life. It is not an emergency, as I keep the controller plugged in all the time, but I was wondering where the problem could be.It is not the power cord into the screw bar. That connection is fine, and a second check of my soldering joints (at a glance) shows them to be fine too. Any suggestions? Something is not making contact somewhere...but once it does come on, it doesn't lose it until i cut the power. Link to comment Share on other sites More sharing options...
Guest guest Posted December 11, 2011 Share Posted December 11, 2011 You're mentioning "the screw bar" which I assume to mean the terminal strip, which suggests its a CTB16K/D.Few things to check:1. check and reheat solder connections on the terminal strip itself.2. check and reheat solder connections on the transformer3. check and reheat solder connections on the fuse clips.4. check and reheat solder connections for the two regulators5. pull the board out of the enclosure, if you have it in one, plug it in and when it is in its "inop" state, tap around with an insulated tool on the board. You'll likely find the general area of your problem pretty quickly if it is a bad solder connection.You can be fooled by solder connections that look fine..reheating them is really the key.If you have the board in an enclosure, and it works fine when you take it out, to where you can't recreate the issue, then check your enclosure for something creating a short.Outside (like less than 1%) chance you have a crack in the board, or something drastic like that, but my guess is, you've got some solder connections to fix. Link to comment Share on other sites More sharing options...
vkjohnson Posted December 11, 2011 Author Share Posted December 11, 2011 If it helps to figure out the problem, I noticed tonight that this controller. fades out much more slowly than the others. Once in a while it flickers too. I should point out that I have no LEDs and this controller carries about 15 amps on each side. If it was a main power feed problem, I'd expect the 15 amps to short that connection by now. Transformer connection maybe? I haven't checked yet. There have been a lot of cars watching the show tonight. Just seeing if this new info helps. Link to comment Share on other sites More sharing options...
Guest guest Posted December 11, 2011 Share Posted December 11, 2011 Until you have taken the steps mentioned above, not much more insight that can be offered.What you observe from a fading perspective is likely unrelated.If you have an intermittent supply connection, or a loose connection on the transformer, terminal strip, etc., your issues will continue.It likely has nothing to do with a "short", or the loading on the board...its an intermittent connection somewhere within the controller board. Link to comment Share on other sites More sharing options...
vkjohnson Posted December 11, 2011 Author Share Posted December 11, 2011 It was a transformer connection. All is good now. Thanks for your help! Link to comment Share on other sites More sharing options...
fxdwg Posted December 13, 2011 Share Posted December 13, 2011 Don is the man!! Link to comment Share on other sites More sharing options...
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