Hi Frank,
Thanks for taking the time to look for the manual.
Unfortunately the Sony ST-JX220a has am stereo decoding, whilst the ST-JX220 does not, the 'A' version is quite a different beast !
Kevin Tekel previously obtained the tech manual/schematics for the ST-JX220a, but he is not accepting messages through this forum, if anyone knows his current email address, please let me know.
Thanks again,
Paul.