Beautiful Sony TA-5650 VFET Amplifier Fault Finding, Repair and Reliability Enhancement

Hi everyone, this time I resurrect a dead and drop-dead gorgeous Sony TA-5650 VFET integrated amplifier.
These VFET amplifiers are loved for many reasons: excellent build, phenomenal sound quality and classic Sony aesthetics. They are not loved for their reliability though and there are issues with all of the amps in this series.
This repair involved fixing a broken circuit board, sorting some bad switches and controls, a relay and other reliability enhancements.
As always, please excuse the minimal editing etc, it's the only way I can get videos out these days due to my workload!
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