fishski13
Member of the Trade: SolderWorksAudio
- Joined
- Nov 2, 2004
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Quote:
The heatsinks on the Sigma 22 are cool with nothing connected.
I didn't notice any smoke for the first Beta 22 board, but I did notice a smell. Perhaps something was burning? I went ahead and tried hooking up another channel and I had the same problem: really hot heat sinks, low positive and negative rail voltages, and a strange smell. This time though, I also noticed a small amount of smoke. Unfortunately, though, I couldn't tell what part it was coming from.
How sensitive are Q1-Q4 to heat? When I was soldering the boards, I noticed I had put those parts in wrong at first, as per the Beta 22 instructions, and had to desolder them. I wonder if I gave them too much heat when I was trying to remove them.
you need to double check the component values and ohm out the B22 boards. you're drawing way too much current and have a short and/or dead components. i would post questions to over at http://www.amb.org/forum/. Ti is at BAF in S.F. today and may not be able the reply right away.