Yamaha CS80

hi folks-im wondering if anyone has experienced this? my cs80 will randomly get a distortion on the output, and it will then randomly go away. it will never last longer than 5-7 seconds at a time, and it doesnt seem to be "control induced" in any way. (it sounds alot like a preamp does with the gain all the way up(signal still comes through). im going to be recording with it in a little while, so i kinda would like to clear this up. any leads on this?

also, i have heard a horror story(old crow site maybe?) about shorting things out by plugging in an expression pedal. i have yet to do this on my 80. any advice? plug it in before i turn it on? should i be worried, or no? 

thanks guys!!!

       
---------------------------------
Get easy, one-click access to your favorites.  Make Yahoo! your homepage.

[Non-text portions of this message have been removed]