Hi Tony I'm strictly hobbyist level, but I've managed a few successes with amps, CD players and DAB tuner. I looked out a P25 Mk11 I got YEARS ago not working. I thought I'd tried all permutations of inputs and knobs, but today after finding a couple of basic issues it burst into life with a beautiful sound through just a pair of Sony speakers from a 'stereo'! Previously I'd replaced the TL072 op amps and re-soldered a leg of C712 that seemed to have been missed originally. I am left however with probably the original fault where there's no output in the 'normal' setting but perfect in the 'direct'. The 5532 op amp shows a short through pins 5 and 6, but I assume (!!?) this would only affect the Phono input? I'm not sure how or if this relates to your post but just might prove yours isn't unique? Esp if you get the same result.....
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