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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. 470
Subject: Appearance Of Bright Lines In Picture Date: February 14, 2000


Symptom:
(1322) After several hundred hours of LED panel use, bright vertical or horizontal lines may
appear in the picture.



Solution: If this symptom should appear please perform the following circuit change.

1. Replace prism block, which is a component in the optical unit. (1-473-848-21).

Note: Refer to VPL-W400Q Service Manual, section 3 and 4 for the following adjustments.

2. Adjust the Polarizer plate.

3. Enter the Service mode.

4. Adjust V-COM.

5. Adjust the white balance.



Description Part Number Qty. Serial Number Range

Prism Block 9-939-709-01 1 1,000,001-2,000,150




Reference: B & P SB 301997003 PRINTED IN USA
xxx Products Service Bulletin No. xxx
xxx Products Service Bulletin No. xxx