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World of Ham Radio 1997
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WOHR97_AmSoft_(1997-02-01).iso
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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 # 1007
MODEL: TS-950SDX
SUBJECT: Speech Processor
Symptom:
Reports of low COMP meter sensitivity, or noise on the transmitted audio
when using the speech processor is normally a result of misadjustment of
the PROC IN control. This control is very sensitive and is difficult to
adjust properly.
Parts Required:
150 ohm chip resistor Kenwood Part No: RK73FB2A151J
Procedure:
Change the value of R258 in the SIG Unit (X57-4130-00) from 68 ohms to
150 ohms. This will increase the available adjustment range of the PROC IN
control. This will make it much easier to properly adjust the control and
thus avoid overdriving the speech processor circuit.
R258 is near L25 and Q33 on the foil side of Signal Unit (x57-4130-00).
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.