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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   <<<
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                        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

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BULLETIN # 998
MODEL: TS-950SDX
SUBJECT: TS-950SDX Mode Switching

Background:

Occasionally the TS-950SDX will transmit instantaneoulsy when the mode is
switched from SSB to CW with the VOX turned on.  The frequency of occurrance
depends upon the setting of the VOX GAIN and DELAY controls.

Cause:  

A small amount of RF feedback is felt on analog switches IC5 and IC6 in the AF
unit.  This RF causes the timing circuit to actuate briefly when the mode is
changed with VOX ON.    

WARNING:  This radio uses micro-sized surface mount components, and/or
multi-layer circuit boards.  If you are not familiar with the techniques for
service of this type of equipment do not attempt this modification yourself. 
You will invalidate your warranty if you attempt to modify the equipment and
damage the radio. If you are at all in doubt about your qualification to
perform this modification you should seek qualified assistance.
 
Required Parts:

C191: 4.7uf/25v electrolytic capacitor  CW04EW1E4R7M

Procedure:
1. Unplug the DSP unit from the rear of the transceiver.
2. Remove the top and bottom covers (18 screws.)
3. Turn the unit so the bottom is up. 
4. The AF Unit is located in the front left hand corner.
5. Remove the 8 screws securing the AF Unit to the chassis.
6. Add C191 in the position indicated in figure 2.
   This cap is next to C189 on the AF Unit and is also next to CN-12
   This cap is not shown in the service manual.
7. Reverse steps 1-5 to reassemble.

Also note that the Pins on CN10 are incorrectly marked, they are reversed. 
They should be marked as follows:

   1 CWB
   2 KEY
   3 VOXQ
   4 RBC 

           
This modification may be covered under warranty. Time required for this
modification is 1 hr or less.