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                             K E N W O O D
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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 # 1043
MODEL: TS-950SDX
SUBJECT: YG-455S-1 Installation Note 

Symptom: When the YG-455S-1 is installed, the LSB audio is slightly off 
pitch. This characteristic is corrected using the "Service Adjustment" 
menu. Early models of this transceiver did not make this adjustment 
available to the the individual operator unless they had access to a 
service manual.

Countermeasures: A menu option has been added to Menu 07 on late versions 
of this transceiver which allows the individual operator to "correct" 
this audio shift. This has been accomplished by changing the program of 
the ROM chip IC-19 on the Digital Unit X46-3130 1/2, and by updating the 
operators manuals. Installing the new ROM on early versions of this 
transceiver will allow the operator the same convenience as is provided 
on later serial numbered sets.

Parts Required:

Qty  Descriptlon      Old Part No.        New Part No.   Circuit Description

1    ROM              27C512BJDUF         27C512BJDUG       IC-19
                           or
                      27C512RJDVF

1   Inst. Manual      B62-0229-30         B62-0229-30       N/A


Time required for this modification is 30 minutes or less.
Service Code A:11 B:X46-3130 1/2 C:IC19 D:91