InTouch Products
Food Service Business
3M Commercial Care Division
3M Center, Building 551-1E-02
St. Paul, MN 55144-1000
19980427
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Headset Intercom System
Model C960AA
Technical Bulletin 4/27/98
Mic Booms
We are getting some
C960
headsets in for repair with “no talk“ symptoms due to broken mics or
mic wires. These failures can be traced to over-flexing the rubber mic boom by the operator. This could
be reduced if the installer would instruct the operator to rotate the microphone boom up or down so that
its tip is in line with the corner of the mouth, but not to bend the rubber microphone boom. We have
recently redesigned the tip to be more robust and you will recognize it as being slightly longer than the
original tip. It is now available in spare parts and will soon appear on production headsets. The mic
boom lock is a disk that keeps the boom at the proper height. It has also been redesigned.
Headbands
Here are some suggestions to reduce the problem of headbands slipping. Replace any worn or
damaged headband pads with new ones; they compress with age. Change pads every few months. Attach
a piece of approximately 1/8” thick double stick foam tape to the main headband, directly below the width
adjustment tab. Then wrap strapping or packaging tape over the foam tape and the headband to keep it in
place as shown below: Headbands are being redesigned to be 0.375” smaller. They will be in production
and spare parts soon.
Place foam tape here
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