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World of Ham Radio 1997
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1997-02-01
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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 <<<
==============================================================================
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
==============================================================================
BULLETIN # 993
MODEL: TH-27A
SUBJECT: LOW TRANSMIT POWER
We have noticed some variation in the output power provided by Toshiba
S-AV22A power modules with a production code of "1I". Modules with this
production code might exhibit low or no transmitter output power. This
procedure will correct this problem .
Parts Required:
0.01 uF axial lead capacitor---------------------- C91-0769-05
Procedure:
1. Remove chip capacitors C17 and C18 from the TX-RX Unit (X57-3640-11.)
2. Install the new axial lead capacitor as shown in the accompanying diagram.
The new C18 is connected from the board edge on one side and to the pad
the "old" C18 on the other side. The cap should lay along the board edge.
Note: Deleting C17 and C18 alone will not correct this symptom. The new C18
will be used to stabilize circuit performance. Deleting C17 alone will not
cure the symptom.
Time required for this modification is 30 minutes or less.