[. . . ] [. . . ] Hi-Fi Products CSA-13 Service Bulletin Sony Service Company - Technical Services A Division of Sony Electronics Inc. Sony Drive, Park Ridge, New Jersey 07656 Model: TC-WR445 No. 421 Subject: Mechanical noise in play mode Symptom: (64) Date: December 27, 1994 A loud mechanical noise may be heard while in the play mode. [. . . ] [. . . ]