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oneplustwo  
#1 Posted : Sunday, April 25, 2010 12:10:24 AM(UTC)
oneplustwo

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Location: san francisco

Non BP:
I initially installed the LED's in backwards and powered up. I noticed the LED's weren't lit, double checked the polarity, reinstalled. Turned it on again, but still not lit. I have the VR's setup per the manual. I get no voltage at the output. Did I toast the LED's? There's no other indication of blown parts.

BP:
On the VR4 side, D5 doesn't light up. It's installed correctly. I think I may have blown one or more of the VR's as a couple of them appear shorted out. I had no idea they were so sensitive as I've never had a problem with any before. Sounds like others have had problems though so I suppose that could be a culprit?

Besides LED's and VR's should I be looking at anything else that might be bad? The QN/QPs perhaps? Or the opamaps?

Russ White  
#2 Posted : Sunday, April 25, 2010 9:32:17 AM(UTC)
Russ White

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Make sure you have not swapped transistors.

The LEDs could indeed be dead.

Measure the voltage across them.
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