What a lovely system.
A line level source, such as your CD player, has an output of around 2V, so it connects to standard line level inputs, such as CD or tuner.
A record player has a much lower level output, so needs a phono stage to handle it. Moving magnet cartridges have a higher output than moving coils, but both of them are much lower than line level.
The 82 can be fitted with internal phono boards to accommodate either type of cartridge. Your 82 may already have them fitted. Alternatively you could get a separate external phono stage. It may have a little sticker on the back saying N, S or K. N is for MM, S is for MC and K was optimised for Linn MC cartridges. Otherwise you may need to open the case and take a look.