Bugera Support

To replace the pream tube with Tun Sol 12 ax7 and a Sovtek 5751 in the phase inverter. But i dont know the exact place of the phase inverter , the reverb and the different chanal. Where are every one of theme?

Hello, My name is Gilmar Senna; I bought a BUGERA 1990 and took it to Brazil, now it is giving a problem to turn off the pre-amp alone, similar to that presented in this link. (Http://www.youtube.com/watch?v=6NVm85-YNuA) I would like to know what the problem is and how to solve. Thanks. Gilmar, Senna SERIAL NUMBER: N0901123670