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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 # 1017
MODEL: TS-950
SUBJECT: Noise with Sub-Band Noise Blanker ON
Symptom:
Noise is generated when NB1 is switched on for the sub-receiver.
Cause:
Switching noise from the noise-blanker gate enters the AF amplifier via
the +15V line causing the noise.
Parts Required:
Qty Description Kenwood Part No.
1 100 uF/ 16V Electrolytic capacitor CE04KW1C101M
1 120 ohm Resistor RD14BB2B121J
Procedure:
1. Cut the pattern of the 15 V line on the IF Unit (X48-3060-00)
component side, near Q34's emitter and add the 120 ohm resistor as
shown in the accompanying diagram.
2. Add the electrolytic capacitor from the end of the resistor that was
added (end closest to L28) to the shield of L28. Quickly solder the
negative lead to the metal shield of L28.
Time required for this modification is 15 minutes or less.
Service code A:09 B:X48-3060 C:ADDR D:91