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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. 460
Subject: Green Edge Appears when all Gray Signal is Date: February 9, 2000
inputted
Symptom:
(133x) When an all black picture is inputted, the upper right and lower left edges of the
picture appears green
Solution: If the customer should complain of this symptom the following circuit change may be
needed.
Serial number range affected
2,000,001-2,003,210
1. Open cabinet of unit, and top cover of optical unit.
2. Remove prism unit from the VPL-W400Q.
Note: As shown in fig 1, the prism unit has:
Cover Glass-held in place with black RTV
LCD panel-held in place with white RTV, and connected to cable
LCD panel holder
Caution:
Cut RTV only deep enough to cut the black RTV, not the white RTV.
Be careful not to cut the cable to the LCD
Do not push knife under the cover glass further than 1mm black border; if you
do, you will scratch the glass.
3. Cut all four edges of black RTV (around four sides of cover glass) to separate
RTV from cover glass. (See Fig 1)
4. Place knife underneath cover glass (not more than 1mm) and lift cover glass to
remove it from the LCD panel.
5. Remove debris from RTV.
6. Unscrew (2) screws attaching LCD panel to prism.
Caution:
Do not dislocate LCD panel. (locking compound is applied to four corners to
prevent dislocation)
Reference: SB B&P 1999-099 PRINTED IN USA
TV Products Service Bulletin No. 460
7. Insert plate over LCD panel in place of cover glass.
8. Tighten two screws attaching LCD panel to prism.
9. Implement steps 3 through 8 for three panels of R, G, and B.
10. Assemble optical unit.
Description Part Number Quantity
Plate 4-070-318-01 3
Fig 1