Robert Gault wrote:

Make sure that none of the diodes in the full wave bridge have blown.
This is frequently a problem.

Two of the bridge diodes were dead. While I was in there I replaced the
two electrolytic caps and the LM324N. It's working!

By the way, I've found a source for the service manual. When it arrives
I'll try to upload it to one of the turntable site (probably
www.vinylengine.com).

Thanks to all for the help.
--
Len Moskowitz PDAudio, Binaural Mics, Cables, DPA, M-Audio
Core Sound http://www.stealthmicrophones.com
Teaneck, New Jersey USA http://www.core-sound.com
Tel: 201-801-0812, FAX: 201-801-0912