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CONFIDENTIAL CSA-13
Sony Service Company
National Technical Services Service Bulletin
A Division of Sony Electronics Inc.
Park Ridge, New Jersey 07656 Hi-Fi Products
Model: CDP-C235, CDP-C335, CDP-C435, CDP-C535 No. 490
Subject: Substitution for KSS-390A Date: June 14, 1996
Symptom:
(**) The Optical Block KSS-390A is no longer available and KSS-240A is supplied as the
substitution. As the two parts have some electrical and mechanical differences,
please perform the following changes according to the model being serviced.
Solution: For CDP-C235/335:
1. Check the value of R421. If it is 8.2K or less, leave it in circuit. Otherwise,
remove it and replace it with a jumper wire.
2. Confirm the existence of R423. If it is mounted, remove it. This is needed to keep
pin 28 of IC401 High when operating CD function.
3. Replace the flat wire which connects the BD Board and Optical Block with the
new type listed below.
For CDP-C435/535:
Just replace the flat cable with the new type. No circuit modifications
needed.
Description Part Number Note
Flat Cable 1-575-001-11 This cable must be used with KSS-240A
Reference: T/N # AU-96011 & 12 May 20, 96 PRINTED IN USA
PRINTED ON RECYCLED PAPER