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transformer hums and is hot to touch
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rdowdall  
#1 Posted : Sunday, April 14, 2013 11:48:32 PM(UTC)
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Hello - I assembled a Placid HD & Placid HD BP awhile back and now have gotten around to powering them up. The Placid HD powered up and adjusted fine. I then powered up the Placid HD BP, the Leds lit however there was a transformer hum. I put my finger on the 15v transformer and it was very hot to the touch. I checked the color of the wire and they are configured black to one rail, yellow to the other with orange & red to common. Removing the transformer from the power supply silences the hum.

I'm suspecting a reverse polarity somewhere but haven't found it yet. Does anyone have any idea where the problem might be?

Thanks,

RD

Edited by user Sunday, April 14, 2013 11:53:55 PM(UTC)  | Reason: Not specified
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Brian Donegan  
#2 Posted : Monday, April 15, 2013 9:46:32 AM(UTC)
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Originally Posted by: rdowdall Go to Quoted Post
checked the color of the wire and they are configured black to one rail, yellow to the other with orange & red to common


Can you describe what you mean by "common"? There are four power input terminals on the Placid BP, and the transformer should be connected with the wires in order: black red orange yellow.
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rdowdall  
#3 Posted : Monday, April 15, 2013 10:45:37 PM(UTC)
rdowdall

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Thanks Brian - On a terminal strip between the transformer and the power supply, I had the orange and red wires combined.

RD
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Brian Donegan  
#4 Posted : Tuesday, April 16, 2013 2:20:35 AM(UTC)
Brian Donegan

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Originally Posted by: rdowdall Go to Quoted Post
Thanks Brian - On a terminal strip between the transformer and the power supply, I had the orange and red wires combined.

RD


So, problem solved?
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rdowdall  
#5 Posted : Wednesday, April 17, 2013 11:47:57 PM(UTC)
rdowdall

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Problem Solved.
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