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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 # 1047
MODEL: TS-950SDX
SUBJECT: Carrier Point Adjustment

Symptom:

The background audio tone is different between the LSB and the USB mode, 
when no signal is present, i.e. the carrier point is incorrect. Occassionally,
this tone is still different after adjustment per the service manual, 
specifically Item 9 on page 196.

Countermeasures:

Change the adjustment procedure for Item 9 as follows:

Test Equipment

Two RF Signal Generators with good frequency accuracy.
A two-signal combiner.
An Oscilloscope.

Preparation:

1. Adjust the two signal generators for equal output levels.
2. Connect the test equipment as shown in the accompanying diagram.
3. Set the frequency of SSG1 to 1.850.2 MHz.
4. Set the frequency of SSG2 to 1.852.8 MHz.
5. Fine tune the output levels of the two SSG's for a good two-tone output 
   on the oscilliscope (Fig. 3).

Adjustment Procedure:

1. Connect the transceiver and the test equipment as shown in Figure 2.
2. Select the Adjustment Mode on the transceiver by pressing and holding 
   the 3 and 9 keys on the keypad while the POWER SW is turned on.
3. Set the output of the two signal generators for a -73 dBm level. 
   Set the SSB SLOPE TUNE control to the NORMAL position. 
   Set the AGC to AUTO.
   Select MENU 00 using the M.CHN/VFO knob. 
   Select USB mode. 
   Press the 8.83 MHz filter key until there is no indicator illuminated 
   (no filter.) 
   Press the 455 kHz filter key until 2.7 k appears in the display. 
   Set the frequency of the transceiver to 1.850.0 MHz. 
   Adjust the TX VFO/SUB encoder control until the waveforms displayed on 
   the oscilliscope cross as shown in Fiqure 3.

4. Switch to LSB. 
   Press the 8.83 MHz filter key until 6 kHz appears in the display. 
   Leave the 455 kHz filter set at 2.7 kHz. 
   Select a dial frequency of 1.853.0 MHz. 
   Adjust the TX VFO/SUB encoder control until the waveforms displayed on 
   the oscilliscope cross as shown in Figure 3.

5. Select MENU 01. 
   Switch to USB. 
   Press the 8.83 MHz filter key until 2.7 KHz appears in the display. 
   Leave the 455 kHz filter set at 2.7 kHz. 
   Select a dial frequency of 1.850.0 MHz. 
   Adjust the TX VFO/SUB encoder control until the waveforms displayed on 
   the oscilliscope cross as shown in Figure 3.

6. Select LSB. 
   Select a dial frequency of 1.853.0 MHz. 
   Both filters should remain at 2.7 kHz.
   Adjust the TX VFO/SUB encoder control until the waveforms displayed on 
   the oscilliscope cross as shown in Figure 3.

Note: This completes the adjustment.

7. To return to the normal display and save these settings you shouid press 
   the CLR key one time.

                  
                  .........
       SSG1 ----->:       :
                  :       :----> SCOPE
       SSG2------>:.......:
                  Combiner
                   
                  
                  
                  
                  .........             .........
       SSG1 ----->:       :             :       :
                  :       :------------>:       :-------------> SCOPE
       SSG2------>:.......:    Ant Jack :.......: IF 2 Out
                  Combiner               TS-950
   

Time required tor this modification is 60 minutes or less.
Service code A:11 B:20 C:241 D:91