7.2 Input Socket Assignment
The NAC 252 has six DIN input sockets and two alternative pairs of RCA Phono sockets. The RCA Phono sockets can be assigned individually to the cd and aux 2 input buttons in place of the DIN sockets.
Input assignment setup is accessed through the NAC 252 program mode. To switch into (or exit from) program mode press and hold the prog key on the remote handset (in preamplifier mode). Program mode is indicated by a flashing indicator on the front panel volume control and the record selection indicators extinguishing.
Note: If no function is operated within five minutes of entering program mode the NAC 252 will return to normal mode automatically.
I thought I’d tried that but I went back to the manual and read it more carefully about the light flashes. It seems one has to hold the selection button until the flashes go off, rather than just once. I got the turntable working. I’ll try the CD player tomorrow and see if that works too!
I know when my 282 went back to have the naim logo changed, it must have undergone a factory reset.
I had to get the thick book out and make sure i had din or rca set etc. Simple enough, but you do need the manual.
Power down to be on safe side. Study the Naim manual and check connections are ok. I would check the DIN - XLR interconnect between Supercap and 250. Also the burndy and lead between 252 and Supercap. If satisfied with all that. Power up and possibly factory reset the 252. Maybe report the issue to your dealer and get them to check things over. All the remote button key presses for din-rca input selects for cd and aux2, unity gain mapping, reset to defaults are well explained in the manual