illume Posted June 12, 2012 Report Share Posted June 12, 2012 (edited) Hey everyone, I'm working on my second sammichSID build (rev. 3), but am having trouble with this one. I can't seem to get it to power up. I've tested J2 (and every other 5 volt source), but am getting a zero reading when it's plugged in. I tested the board before populating and everything was cool. I'm using the same 12 volt, 500 ma, tip positive power supply I've been using for my successfully completed Sammich. I've double-checked all of the resister value placements and capacitor orientations and re-heated all of my solder joints, but still no luck. Any ideas on what to do next? Thanks in advance! -Brandon I should add: The only real variable I can think of, between this build and my last, is the 2 top-outer arms of the rocker switch being cut off (which I did). Could this somehow be preventing my Sammich from turning on ? Edited June 12, 2012 by illume Quote Link to comment Share on other sites More sharing options...
nILS Posted June 15, 2012 Report Share Posted June 15, 2012 If you get no voltage at all you have a problem in the PSU section. Trace every trace with a continuity tester from the DC socket through the rectifier to the voltage regulators. If that's all goo, you simply forgot to turn the switch on :) Quote Link to comment Share on other sites More sharing options...
illume Posted June 18, 2012 Author Report Share Posted June 18, 2012 Thanks for the reply nILS. I'm a little green when it comes to checking any of the other traces and pads, outside of what's spelled out in the manual. It seems that I'm now getting some juice, but not as much as I need. Most of the 5 volt sources are giving out 1.6 volts, the 9 volt sources are giving out 5, and the 12 volts are giving out 10. 7 volts. Everything looks soldered correctly in the psu section. Can you give me some pointers on any specific pads to check for continuity between? Quote Link to comment Share on other sites More sharing options...
illume Posted June 19, 2012 Author Report Share Posted June 19, 2012 Solved! I totally had the voltage regulators flipped. Doh! Quote Link to comment Share on other sites More sharing options...
nILS Posted June 20, 2012 Report Share Posted June 20, 2012 :) Quote Link to comment Share on other sites More sharing options...
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