Vintage Synth Repair

Hello !

I have a Bryston 3B, serial 310255, which I buyed used in 1987 I think.
Now, it needs some service,- bias calibration only I hope.
I\ufffdve found the schematics in the web but a service/repair manual would 
help better.
So, is there anyone who has it in a PDF format ?
My main prob is to open the amp.
Can anyone tell me which tool is needed (screwdriver format ) and where 
I can get this tool ?

thx in advance

PeWe