Refurbishing the Rockola 45730 and 47160 amplifiers from the early 70's

[@rizanx01]

Thanks for this, it is really helpful. I accidentally disconnected the speakers when powered up and now I have a very distorted and low sound output. Do you think I have damaged the OP transistors. I do not have an analogue test meter just digital so can't check in the way you suggest, although they test with no shorts but readings across collector emitter

[@TaironSteven]

Greetings from Venezuela, I have (rockola 47160) I would like to know which are the outputs for the jacks and which would be the input I have the amplifier with its power source and I would like to put it to work