Yep that is the correct schematic, its the last one down.
Thank you for the book tip, I'll have a look at it.

I've discovered that both my amplifier boards have 0 idle current.
There is something likely going on with the effects board.

Hi all,

I'm a tube guy, I know some SS stuff, mainly simple Wurlitzer EP boards. I'm completely bewildered when it comes to these JC schematics, they're a bit intimidating!
I was hoping someone could point me to the location of the output bias voltages. This is a 3rd revision schematic, serial 533XXX. I'm not sure if I'm allowed to upload the schematic as I've never posted here before.

Mainly, the issues are subtle crossover distortion on both channels, plus the distortion effect doesn't seem to work. Also on the second channel, there is noise behind the test signal. When you kill the signal, the noise persists for a second and then goes quiet. It may be my imagination but the noise has a chorus effect on it. 
The PSU is fine, +/- 43V & +/- 15V rails are making it to each board.

Any tips would be appreciated! thanks for your time