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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-
2002/BP-1002 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 C61 on the underside of
the printed circuit board.
3. Remove capacitor C61 from the printed circuit board.
RESTORING MIC-KILL AND CALL SIGNAL
To restore the Mic-Kill and Call signal features, replace C61 with Telex
®
part
number 102879-218, 1500 pF, 50V capacitor.