Hello people! I recently restored a 4.6 pre (recap, deox, cleaning, etc.). Everything was fine, sounding excellent, when the oscilloscope probe’s crocodile broke away from ground and touched one of the power supply transistors, causing a spark. From then on it turns on, but only works in Straightwire mode. The power supply works properly. I can’t find the schematics and/or service manual. Do any of you have it? He would forever be in my prayers.
Hi Mephysto,
I managed to get my hands on what looks like the hand drawn schematics from a PS audio employee several years ago. I also have a copy of the 5.0 manual which was an almost identical preamp.
If you’re interested in seeing what I have, just let me know.