I'm working on an Altec 1269 amplifier that I think was manufactured in the '90s. It is similar to the 1268 and the 1270 but has a different number of transistors and runs at a different voltage. I have searched the 'net for technical documentation and found none (!). Does anyone know where I might find technical documentation on this unit? I am particularly looking for a schematic and bias information.

Thanks in advance!