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CTB-16KV6 with no LED Lit when powered


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This is my 3rd board to build. This one is giving me some problems.

When powered the LED is not lit. Fuses are getting voltage to each side. I am going over the troubleshooting guide, and my transformer is warm and Voltage Regulator Q16 gets very hot quick.

The only suggestions the guide gives for troubleshooting this, is to remove all ICs from sockets and replace one at a time.

I have two ICs that can be removed and Q16 still gets hot with them removed.

At this point the Guide stops and there is no other suggestions.

Anyone have any suggestions?

Thanks

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