On Wed, 13 Feb 2008 10:03:25 -0800 Kevin Cosgrove <kevinc@xxxxxxxxxxxx> wrote: > > When I took > > apart the breakout box, I saw a quadrupling circuit on the left hand side > > of the bottom board (toward the front of the case, underneath the small > > board that's on top) that had a couple of oozing caps. > > That happens more often in electronic equipment than the public generally knows. > Remember the laptop battery recall from months ago? I've seen quite > a few recalls for capacitor problems over the last 3 decades of > working in the electronics industry, first as a part-time soldering > and assembly person, and now as an analog IC designer. There was a brand of motherboards that famously had capacitor issues a couple of years ago as well. I'm glad that having worked throughout my high school years as an electronic assembler, I know which end of the soldering iron to hold. I've been able to revive a lot of "dead" gear over the years! > > The 35v caps are recommended, it was the underspec'ing of the caps that was > > causing the problems in the first place. > > Did you measure the voltage somehow, or did you get documentation > from M-Audio somehow to figure out the new recommended voltage rating? I remembered a discussion on the Planet CCRMA list about the caps when I had my problem, and there was a great post from someone who knew more theory than I did about why 25v was too small for the circuit, and that 35v was the way to go. > Excellent write-up. Thanks a bunch! No problem; we all learn something when we post our successes here. -- ====================================================================== Joe Hartley - UNIX/network Consultant - jh@xxxxxxxxxxxx 129 Petta. Lake Rd, Saunderstown, RI 02874 - vox 401.338.9214 Without deviation from the norm, "progress" is not possible. - FZappa _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user