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S 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: KV-20FS12 No. 497
Subject: Intermittent Or No Remote Operation Date: August 23, 2000
Symptom:
(2151) Intermittent or no remote operation.
Solution: The Multi-button Assembly 4-073-843-04 is hitting the Remote Sensor (IC2001)
8-742-134-00, causing the remote sensor mounted on the "A" Board to bend. Thus
causing an intermittent connection on the board and loss of remote operation. If the
customer should complain of this symptom the following changes will need to be
performed.
1. Places that are hitting the remote sensor are shown in Fig. 1
Fig 1.
Reference: S. Alvarez PRINTED IN USA
TV Products Service Bulletin No. 497
2. Re-solder the pins of the remote sensor, IC2001, as shown in Fig 2.
Fig 2
3. The multibutton can be modified or replaced for the new type multibutton suffix -05 (4-073-843-05) this
suffix was re-tooled as a permanent countermeasure. To modifiy the multibutton with suffix from -01 to -04,
follow the steps as the picture below shows.
1. Identify the part number 4-073-843-(01-04)
Area to be modified. See Fig 3
Fig 3
2. Cut 1 stacking rib completely
See Fig 4 & 5
Fig 4 Fig 5 2
TV Products Service Bulletin No. 497
4. Cut the rib as shown in Fig 6 & 7. Cut about 1mm off the corner.
7m
5mm Not drawn to scale
Fig 7
Fig 6
To convert millimeters to inchese multiply 0.03937.
5. Cut the horizontal rib as shown in Fig 8.
Cut this horizontal rib by about
1mm.
1.0 mm
Fig 8
3
TV Products Service Bulletin No. 497
6. Cut 1 vertical Rib as shown in Fig 9 & 10. Cut at
least 1 mm off the rib.
Fig 9
1.0 mm
Fig 10
The steps above, steps 3 through 10, will prevent the remote sensor from becoming damaged do to the
stress placed on it by the Multibutton.
4