Service Manuals, User Guides, Schematic Diagrams or docs for : Sony HiFi Service Bulletin HFP0451

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                                   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:      MDS-501                                                            No.    451
Subject: RF/Servo Board Procedure when replacing                               Date: November 10, 1995
         Optical Device


Symptom:
 (****)        The original optical device KMS-140B, (Ref. #21) P/N 8-583-003-21, has been
               replaced by the KMS-140C (P/N 8-583-005-11).

               After replacing the optical device, you may find that the unit will play CD discs but
               not MO discs. Proper adjustment also may not be possible after replacing the optics.



Solution:      Perform the following procedure on the conductor side of the RF/SERVO Board:
                

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