Service Manuals, User Guides, Schematic Diagrams or docs for : Sony HiFi Service Bulletin HFP0428

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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:      GEN-HFP                                                         No.    428
Subject: A Whistling noise is heard when playing certain                    Date: February 1, 1995
            Discs.


Symptom:
  (64)          A whistling noise can be heard from the mechanical assembly. The whistling noise is
                a result of vibration of the disc, optical lens, and BU base which results in an audible
                resonant frequency. The following modification is applicable to all units that use the
                KSS-240A optics and exhibit the audible noise.




Solution:       To reduce the vibration of the BU base add the weight (P/N 4-962-979-01) to the
                optical block using a +PTP2.6X8 screw (P/N 7-685-134-19) in place of the original
                screw.




Reference: FPR-P3350                                                                             PRINTED IN USA
Autoflagged - NO
                                                PRINTED ON RECYCLED PAPER
Audio Products Service Bulletin No. xxx

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