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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 # 1010
MODEL: AT-50
SUBJECT: Blows ACCY Fuse in TS-50S

Symptom:

Attempting to tune the AT-50 when it is connected to an antenna with a
relatively high SWR value might cause the ACCY fuse to open in the TS-50S. 
This change will correct this tendency.   

Parts Required:
Qty     Description                     Kenwood Part No.                 

2      .047 uf Disk Ceramic Cap          CK45B1H473Z             

Procedure:

1. Remove the top cover from the antenna tuner.
2. Locate X53-3470-00 D/4 (It is attached to the top left side of the
   chassis with the foil side up.)
3. Add the two .047 uf capacitors across D303 andode and gate to Ground as 
   shown in the drawing.
4. Replace the top cover.

No additional adjustments or modifications will be required.

Caution: This modification requires soldering equipment rated for CMOS type
circuits. It also requires familiarity with surface mount soldering
techniques. If you do not have the proper equipment or knowledge do not
attempt this modification yourself.  Seek qualified assistance.

Time required for this modification is 30 minutes or less.
Service code A:01 B:X53-3470-00 C:ADDC D:91