Golden Tube Preamp Woes Revisited

My SEP-1, which sounded great, died a slow death. The volume started fading out, but would jump back to normal if I switched back and forth to mute, which I initially assumed was a switch oxidation problem. Then it wouldn't give any sound at all. My great local dealer Flip's Stereo is working on it, but schematics would make a big difference. Are there any out there?

According to the phono board manual, these are the jumper settings for PB-1: Jumper 1...left ch...install 100 ohm resistor Jumper 2...left ch...install 47k ohm resistor Jumper 3...left ch...install=200pF loaded; remove 100pF loaded Jumper 4...left ch...for high output cartridges (3.0mV-6.0mV) Jumper 5...left ch...for medium output cartridges (1.0mV-3.0mV) Jumper 6...left ch...for low output carts (.5mV-1.0mV) Jumper 7...right ch...install 100 ohm resistor Jumper 8...right ch...install 47k ohm resistor Jumper 9...right ch...install=200pF loaded; remove=100pF loaded Jumper 10...right ch...for high output carts (3.0Mv-6.0mV) Jumper 11...right ch...for medium output carts (1.0mV-3.0mV) Jumper 12...right ch...for low output carts (.5mV-1.0mV) ...says also that Factory Setting is 47k ohm, 200pF loaded, medium gain. Good Luck!

Also, anyone reading this, I would be very interested in obtaining schematics for Golden Tube gear, especially the SEP1 preamp. Also, any idea on where to get parts? Following this will be answer for Chuckaolcom.