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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 # 878
MODEL: TS-530S
SUBJECT: IF Unit Q2, Q7 Protection
High voltage transients at the receiver antenna can be felt in the ALC
circuitry and cause a failure of IF unit transistors Q2 and Q7. Symptoms
encountered bay be a loss of RX sensitivity, and or loss of S-Meter
deflection.
Add the surge suppressor to the AF unit (X49-1150-XX) between terminal FG
and ground, to prevent a reoccurance of this symptom.
Parts required:
Surge Suppressor ERZD03DK331
Time required for this modification is 1/2 hour or less.