I recently loaned my 103 out and when I got it back, I noticed a strange sound. It is a buzz that occurs when the sweep is turned all the way clockwise and the noise is in phase with the LFO.
Is this the kind of problem that warrants sending the pedal to Moog?
You could ask Amos either on MoogSpace or here: http://www.moogmusic.com/contact.php Choose the Tech Support button.
Good luck. And don’t let ANYONE borrow your Moog gear!! 
i sent a question about my phaser too through that link and i never got a response 
I had a problem with the CP-251 when I first got it, and I called them up. I think making a phone call would probably be the best way to get the problem solved.
Just got everything taken care of, I believe. Made the phone call and talked to Amos. Definately the way to go - thanks guys.