Everything seems to work except for no sound even through the pre outs. However I will get sound using Zone 2
height 2 amp and pre outs. I get extremely quite sound through main zone L R if I use the phono input (only with the phono input)
Looking at page 24 in the service manual the phono input has an extra pre amplifier circuit and because I was getting faint sound through that input I was thinking it was the op amps I replaced the main left right channel op amps (NJM8080G) however that didn't fix it.