2. home-theater
  3. 161953-9815

Madrigal Proceed PAV Schematics

I have a Proceed PAV (the one with button volume control instead of knob) that I inherited from my uncle. I was using it just for 2 channel listening. It started shutting itself off intermittently when I adjusted the volume level. Now, when I power it on, all of the lights go on for a second, and then blank and then I hear a regular clicking sound. I assume that's a relay. Any advice on this issue would be appreciated.
But I am also looking to obtain the schematics or service manual for this component. Madrigal Labs is out of business, and I can't find any contact info for Madrigal/Mark Levinson on the Harman International website.
ubersujith
auxinput
2,920 posts
 
Wow, this PAV is from 1995!!   When stuff gets this old, it's very typical for the electrolytic caps to have dried up and will not contain capacitance charge.  This, in turn, will not hold that relay on.  You want somebody to replace those caps.  The following link has a large number of PAC pictures:

http://amp8.com/tr-amp/foreign/proceed/jpeg/

The "pav-b.jpg" picture shows the power supply board specifically.  I can't see anything that might be a relay, but you would probably want to re-cap the entire board.  If you're getting this work done, it's probably worth it to recap the entire unit.
ubersujith OP
9 posts
 
Wow! Thanks so much, auxinput. I'll let you know how we get on. I'll have to price out recapping the entire board and then make a decision, but I would love to. This is by far, the best sounding pre-amp I own. By which I mean transparent. I didn't even understand what that meant until I plugged this into my system.
auxinput
2,920 posts
 
Are you planning on doing the re-cap yourself?  Or having somebody do it?
ubersujith OP
9 posts
 
A local shop is doing the work. Not retail, just a repair shop fixing hi-fi and musical instruments, who are attached to a practice studio. They have done good work for me in the past, and I trust them.
More to discover