"Table Of Contents" or TOC error.
Sounds to me like the player doesn't recognize that the first disc has been removed, and it's trying to find the first track (of second disc) at the address of the first.
The reason it works if you turn it off/on is the TOC buffer is purged when machine is powered off.
This allows the next TOC info to be loaded for subsequent disc.
If you have a remote control, try opening the machine (after disc-1) with the remote and load/play disc-2.
If this doesn't work, use the "open/close" button on the machine itself and see if this makes a difference.
Also, try pressing "Stop" button prior to ejection, etc. (you are trying to find what will purge
the TOC buffer).
Finally, try contacting Accuphase home office for advice.
This could be a firmware issue related to disc region-code
(USA is region-1).
Sounds to me like the player doesn't recognize that the first disc has been removed, and it's trying to find the first track (of second disc) at the address of the first.
The reason it works if you turn it off/on is the TOC buffer is purged when machine is powered off.
This allows the next TOC info to be loaded for subsequent disc.
If you have a remote control, try opening the machine (after disc-1) with the remote and load/play disc-2.
If this doesn't work, use the "open/close" button on the machine itself and see if this makes a difference.
Also, try pressing "Stop" button prior to ejection, etc. (you are trying to find what will purge
the TOC buffer).
Finally, try contacting Accuphase home office for advice.
This could be a firmware issue related to disc region-code
(USA is region-1).