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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 # 950
MODEL: TS-440S
SUBJECT: CASE SCREWS BINDING IN HEATSINK
Occassionally a case screw that fastens to the heat sink of the TS-440S
will cross thread or bind when it is being inserted or removed. Binding
may be caused by tooling marks on the screw or by burrs on the tapped
threads in the heat sink. When a screw starts to bind, DO NOT TRY TO
FORCE IT! as this may cause the head to shear off. If the screw is being
removed and it starts to bind, return the transceiver to KENWOOD. Do
not make attempts to remove the screw. In addition, if a transceiver is
being brought to you with a scrw sheared off, return the unit to
KENWOOD. Do not attempt to drill out the screw.
If a screw starts to bind when it is being installed, carefully back it
out. Inspect the screw for marks or burrs and replace it if it is
questionable. Since the threads in the heat sink may be causing the screw
to bind, they should be cleaned by running a 3 x 0.5 mm tap into each
hole. The tap is inexpensive and can be obtained at many of the
larger hardware stores.
To avoid cross threading, make sure the covers are properly aligned when
they are being installed. Proper alignment means that there is a clear
path for the screw to turn into the heat sink. This assures that the
screw does not rub against the case and result in it turning into the
heat sink at an angle.