hifi engine

Kenwood KM208

Good Day to all

Does anybody have a procedure in setting up the bias current of kenwood KM208 since the service manual says that zero volume and the amplifier has no volume control at all. The said unit blows the 3rd stage amplifier till the main power transistor fried out 2sa1216, and 2sc2922 I don't want to blow them again during setting up bias current.

any idea out there, do I need to hook up a temporary volume control to the unit? Please help can i still test the amp with no power transistor installed? What would be the safest way to test the amp?

thanks to all