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World of Ham Radio 1997
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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 # 1027
MODEL: TM-732A
SUBJECT: Protection of Q201 in 430 MHz Unit
Symptom:
Q201 the first RF Amplifier in the 430 MHz unit fails at random.
Corrective Action:
Addition of diode D218 in parallel with diode D214 in the RA line provides
increased surge protection for Q201. This diode is added on the 430 Mhz
TX-RX Unit (X57-4000-11) near Q201.
Parts Required:
Qty Description Kenwood Part No.
1 Diode HSK277 D218
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:18 B:X57-4000-B4 C:D218 D:91