troubleshooting an MXR Stereo Chorus

[Glen]

At 10:11 PM 12/26/00 , Nicholas Pelkey wrote:
>Hey gang,
>I just got back from my local guitar/amp/effect shop where I was checking on 
>the progress of repair on my old MXR Stereo Chorus.  Unfortunately he didn't 
>dare touch it saying it was "digital" and that I should send it to MXR. 

Digital? I don't think so. This unit was built with BBD technology,
op-amps, and a few transistors. There's nothing digital about it.

Just in case it helps you out, there is a schematic for this unit available
on the internet at this site:

   The site's main page:
   http://www.compassnet.com/~cjlandry/index.html

   The actual schematic link:
   http://www.compassnet.com/~cjlandry/schems/mxr.gif


I hope this helps. The schematic listed above is a little blurry, and it's
hard to make out some of the transistor numbers, but it should still help
you figure out the circuitry. Perhaps you could even look inside your
pedal, and confirm the transistor numbers for us?

If anyone knows of a sharper schematic on the internet than this one,
please speak up. 


Later,
Glen