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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 # 961
MODEL: TS-950S/SD
SUBJECT: N.B. GATE SWITCHING NOISE 01/17/90
Switching noise from the main band noise blanker circuit may be induced
on the 15V line and pass through the AF amplifier to the speaker.
The following modification will correct this condition.
NOTE: This modification has already been performed on models starting
with serial number 104XXXX.
REQUIRED PARTS:
120 OHM, 1/8 WATT RESISTOR PART # RD14BB2B121J
100uF, 16V ELECTROLYTIC CAPACITOR PART # CE04EW1C101M
1. Disconnect the power cord and antenna.
2. Remove the top and bottom covers (18 screws).
3. Locate the AF board. This is the front left board of the 4 boards
on the bottom of the transceiver.
THIS WORK WILL BE DONE ON THE COMPONENT SIDE OF THE AF BOARD.
1. Cut the foil as shown in the acompanying diagram.
2. Add a 120 ohm resistor between the emitter of Q48 and the 15V line.
3. Add a 100uF, 16V capacitor between the 15V line and ground.
4. Reassemble the transceiver.
This modification is covered under the 1 year warranty.
Time required to perform the modification is 0.5 hrs.
(C)011190EWP