Naim having confirmed that they are no longer repairing CD players - I had my local dealer send my CD5X as a last hope it to their repair man who reports:
“left channel PCM1704 IC Pro version DAC has PCM serial data input but no analog output - SMD IC DAC unobtainable in Pro-version and obselete, player classed as EOSL (End of Service Life)”
Damn pity as the right channel DAC was replaced by Naim in 2022 and all in all I reckon over the years I have had the CD player from new it’s only had about 60 hours of play time, just nice to have a player around for my remaining CD collection.