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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 # 848
MODEL: TS-530S
SUBJECT: Low Voltage Supply Optional Improvements
Power supply drift and stability may be improved by these optional
component changes and additions.
On the AF AVR unit X49-1150-00 (Vicinity of Q19,Q20) change:
R68 from 1K to 1.5K (RD14CB2E152J)*
R72 from 470 to 390 (RD14CB2E391J)*
D14 from WZ-061 to XZ-053 (V11-4101-60)*
*This will improve temperature drift from a maximum of about 100mV to a
maximum of 1mV, and may be applied to any unit before serial # 201xxxx.
Add two 22 k ohm 1/4 resistors (RD14CB2E223J0, one each across Q19, and
Q20, collector to emitter.#
#This will improve overall stability and may be applied to any unit before
serial #201xxxx.
Note: These changes are at the owners option and may not be performed in-
warranty.