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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 # 1003
MODEL: TS-950SDX
SUBJECT: K1EA Ver.8 Program
We have received several reports of the transmitter unkeying when using
the K1EA Contesting program. This symptom only occurs when the TS-950SDX
is used with version 8 of the K1EA program. Apparently some of the more
advanced control features of this new version of the program cause the
radio to think the program has unkeyed. A new EPROM is available that
corrects this transmitter drop out.
Procedure:
1. Remove the top and bottom covers of the TS-950SDX.
2. Carefully unplug the two DSP unit cables from the rear of the
transceiver.
3. The front panel of the radio is desiged to allow it to be tilted forward
for ease of service. To tilt the front panel forward remove the screw
at the top of the brackets that secure the front panel to the chassis.
(Please refer to the accompanying diagram.) There is one screw on each
side of the front panel.
4. Next loosen the remaining screw at the bottom of each bracket.
5. Gently pull the bottom of the front panel forward until it reaches the
end of the slot in the bracket and gently pull the top of the front panel
down.
6. Now look at the circuit board mounted vertically on the main chassis.
This is the Digital Unit (X46-3130-11). Near the center of this board
you will find the lithium battery for memory backup and a large IC
installed in a socket. This is the EPROM.
7. Carefully remove the IC from the socket. Use an IC puller or very
gently pry it out by slipping a small flat tool between the IC and the
socket. Do not use excessive pressure as you can damage the circuit
board if you pry too hard!
8. Take the new EPROM and carefull install it in the now vacant socket.
Note that the notch on the end of the EPROM should be down.
9. Reverse steps 1 through 5 to reassemble. Make certain you do not pinch
any wires when you return the front panel to its vertical position.
10.You will need to reset the microprocessor after the radio is
reassembled. This is done by pressing and holding the A=B key while
the power is turned on, and then release the key.
Time required for this modification is 30 minutes or less.