The Collaborative International Dictionary of English v.0.48:

auto-changer \auto-changer\ n.
   1. an automatic device on a record player that causes new
      records to be played without manual intervention.

   Syn: record changer, changer.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

auto-changer
    n 1: an automatic mechanical device on a record player that
         causes new records to be played without manual intervention
         [syn: record changer, auto-changer, changer]