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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 # 886
MODEL: TS-930S
SUBJECT: Intermittent TX Power Output


The following procedure should correct any tendency of the TS-930S to
exhibit intermittent TX power output.  Most of the reported cases of thsi
nature have been traced to poor contact of one or more plated thru holes
mentioned below.  Careful adherence to this procedure should prevent
reoccurrance of this symptom.

Procdeure:

1.   Remove the top and bottom covers.
2.   Remove the 10 screws  securing the final unit to the chassis.
3.   Disconnect all cable assemblies from the final assembly, and remove it
     from the radio.  The fan motor cable may have to be removed for easy
     access.
4.   Remove all Final Unit PC board screws and turn the circuit board foil
     side up.
5.   Desolder Q6, D2, and the plated-thru hole connecting the foils from
     R20 and Q8 base together (between T2 and VR1).  Do not remove the
     components!
6.   Carefully remove the green solder resistant coating from the immediate
     areas of these six points, so that there is bare copper foill up to and
     surrounding the eyelets.
7.   Carefully resolder these six points, and those listed below:
     Q1 Emitter and base
     D4 anode and cathode
     Q2 Emitter and base
     Q3 Emitter and Base
     Q7 Emitter and Base
     Q4 and Q5 Base and collectors
Plated-thru hole between C36 and C15
     (2) Plated-thru hole sby the molex connector.
     Check and resolder the input and output coax connectors.
8.   Double check your work to ensure that there are no solder bridges or
     splashes.
9.   Check the value of R19.  If it is not 6.8 K ohms, change it so it is.
10.  Reinstall the final assembly, and readjust the idle bias currents of
     the driver and final transistors in accordance with Service Bulletin 867.

CAUTION:  ENSURE THAT NO CABLES ARE PINCHED BETWEEN THE FINAL ASSEMBLY AND
CHASSIS WHEN REINSTALLING THE FINAL UNIT.  THE FAN CABLE IS ESPECIALLY
VULNERABLE, SO PAY CLOSE ATTENTION!


Time required for this modification is 1 hour or less.