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World of Ham Radio 1997
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1997-02-01
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==============================================================================
K E N W O O D
>>> A M A T E U R R A D I O S E R V I C E B U L L E T I N <<<
==============================================================================
Kenwood Service Centers
Kenwood Service Corporation Kenwood Service Center, East
2201 East Dominguez Street 829 Lynnhaven Parkway, Suite 130
Long Beach, California 90801 Virginia Beach, Virginia 23452
Telephone 1-310-639-5300 Telephone 1-804-340-1702
==============================================================================
BULLETIN # 963
MODEL: TS-950S/SD
SUBJECT: RX DIGITAL NOISE 01/17/90
Some early TS-950SD transceivers may exhibit a low Signal to Noise ratio
on ten and fifteen meters. In addition, rotating the encoder may allow
the user to hear a crackling noise in his headphones. The following
modification will correct this condition.
NOTE: This modification has already been performed on models from
serial number 101XXXX
1. Disconnect the power cord and antenna.
2. Remove the top and bottom covers (18 screws).
3. Open the subchassis as shown in figure 1 (remove 4 top screws,
remove 3 back panel screws, unplug the RX ANT OUT and DRIVE IN connectors).
4. Remove the cover from the subchassis (12 screws). FIGURE 1.
5. Remove the 9 screws from the Filter board.
6. Desolder the antenna connector wires at the antenna connector.
Do not damage the surge absorber.
7. Rotate the Filter unit to expose the foil side of the board.
Disconnect coax cables as necessary to rotate the board and remove
the mesh plate as the board is rotated.
8. Cut the two ground foils as shown in figure 2.
9. Assemble the transceiver by reversing steps 1 - 7. Remember to
install the mesh plate, resolder the antenna connector, and plug
in the two connectors on the back panel.
This modification is covered under the 1 year warranty.
Time required to perform the modification is 1 hr. or less.