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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 # 1034
MODEL: TS-850S/VS-2
SUBJECT: No audio from VS-2

Symptom:

Several users have reported a problem with the Voice Synthesizer Unit VS-2 not
voicing the frequency reliably when the Voice button is depressed.  This
symptom is caused by a drop in the 5C voltage from 5 vdc to approximately 4.5
vdc when the VS-2 is connected.  The following change will correct this
symptom.
 
 
Parts Required:
Qty   Description        Old Part No.     New Part No.  Circuit Description

1     47 uH Chip coil    L40-2211-48      L40-4701-48   L501            


Procedure:

Change L501 from 220 uH to 47 uH on the RF Unit (X44-3120-00 C/4).

Caution: This modification requires surface mount soldering equipment that is 
rated for CMOS circuits.  It also requires familiarity withsurface mount
soldering techniques. If you do not have the proper equipment or knowledge do 
not attempt this modification yourself.  Seek qualified assistance from your
closest Kenwood Service Center (Long Beach, CA, or Virginia Beach, VA).

Time required for this modification is 30 minutes or less.                 
Service code A:98 B:X44-3120-00  C:L501 D:91