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CONFIDENTIAL CSV-1
Sony Service Company
National Technical Services Service Bulletin
A Division of Sony Electronics Inc.
Park Ridge, New Jersey 07656 TV Products
Model: VPL-W400Q No. 463
Subject: Optical Unit Replacement Date: February 2, 2000
Symptom:
(1381) Optical Unit is damaged by heat
Solution: Polarizing plate will be damaged if airflow control plates are not installed.
New optical units are not shipped with airflow control plates. When replacing the
optical unit use airflow control plates from former unit. Install the airflow control plates
as follows:
Installation Procedure
1. On bottom of optical unit remove four screws which attach the airflow control
plates.
2. Remove the two airflow control plates, A Plate (4-055-122-03) and B Plate
(4-054-912-01) from former unit.
3. Install airflow control plates into new unit using four screws from step 1.
Reference: B & G SB 301999037 PRINTED IN USA