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APPENDIX A
OPTIONAL FOOTBALL MODIFICATIONS
GENERAL DESCRIPTION
In Audiocom® Intercom Systems, the Mic-Kill feature is used
to turn off any activated microphones on a selected channel.
The Mic-Kill feature is activated when the beltpack receives a
24 kHz signal from the channel. In some applications the
Mic-Kill and Call signal features are not desired and need to
be disabled.
ELIMINATING MIC-KILL AND CALL SIGNAL
CAUTION
TO PREVENT DAMAGE TO THE EQUIPMENT, THESE
MODIFICATIONS SHOULD ONLY BE MADE BY
QUALIFIED TECHNICIANS.
If desired, the Mic-Kill and Call signal features can be disabled
in the BP-2000/BP-1000 by removing a surface-mounted
capacitor from the printed circuit board. Perform the following:
1. Before making changes to the printed circuit board,
disconnect all power and line connections from the
beltpack.
2. Refer to Figure 3 and locate C38 on the underside of the
printed circuit board.
3. Remove capacitor C38 from the printed circuit board.
RESTORING MIC-KILL AND CALL SIGNAL
To restore the Mic-Kill and Call signal features, replace C38
with Telex® part number 102879-218, 1500 pF, 50V
capacitor.
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