- May 27, 2015
Hi all. I recently assembled a CMOYBB from jds labs with no problem so i figured i would try an O2 next. I put it together and performed all the tests with a dmm recommended on Nwavguy's site and everything looked fine. I set up with for rear power and I left out bt2 because I'm planning on installing an ODAC later too. I installed the board in a case making sure nothing was grounding and powered it up with no issues. I left it on with some cheap headphones and everything was fine for about half an hour. Suddenly I caught the odour of hot electronics. After taking it apart and trying it on a bench, I can see u5 and u6 are getting burning hot with the power switch off. I can't find any bad solder joints or shorts and I tested all the components up stream and can't find a problem. I'm assuming that I'll have to replace the regulators but I want to find the problem first. I'm completely frustrated now. Any help would be appreciated.