HFP0428_Ž_.PDF part of Sony (Bulletin) GEN-HFP HFP0428_Ž_.PDF, Confidential Service bulletin hi-Fi product - Symptom: 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. text manual preview

Text preview for : HFP0428_Ž_.PDF part of Sony (Bulletin) GEN-HFP Confidential Service bulletin hi-Fi product - Symptom: 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.

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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
Discs.

Date: February 1, 1995

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 Autoflagged - NO
PRINTED ON RECYCLED PAPER

PRINTED IN USA

Audio Products Service Bulletin No. xxx