Well , no luck on my first turn on. I am getting 35v output on the speakers , 70v between GD and SD on the bottom half mosfets and 1.5v between GD and SD on the upper. I am not getting any voltage on Z5 or on the two ZTX450 ,even on the source resistors or anywhere else that is noted in the service manual. I have checked transistor orientation. I still am not sure on zener orientation. I understand the black band is at the anode or not ? Everything is quite cold despite the voltages above. I guess there must be a serious mistake somewhere. I thought that I would get part of the circuit at least working ,the 1st and output stage are reasonably independent or not? Shouldn't Z5 measure correctly independently of everything else if it is orientated properly ? Shouldn't the output mosfets warm up?