Muting Function; Mic/Tel Input Impedance Selection; Jumper Wire Setting - Toa BG-115 Operating Instructions Manual

8. MUTING FUNCTION

Announcements made using the Mic/Tel input take precedence, decreasing the sound volume of all current
broadcasts from equipment connected to the Program or AUX input. The interrupted broadcasts are
automatically restored gradually after Mic/Tel input announcement completion. Use the sensitivity control to
determine the threshold value for muting. Turning the control clockwise increases the sensitivity, while the
counter-clockwise rotation decreases the sensitivity.
When operating an external muting function (muting from the terminal block), short the muting terminals of the
terminal block on the rear panel. Signals to the AUX input and Program input are muted. Turn the sensitivity
control fully counterclockwise when using this function.
The BG-115 (BG-130) is set to mute the AUX and Program inputs by the
factory. To mute the Mic/Tel input instead of the AUX/Program inputs,
change the position of the jumper on the internal circuit board.
CAUTION
These servicing instructions are for use by qualified personnel only. To avoid electric shock, do not
perform any servicing other than that contained in the operating instructions unless you are qualified to
do so. Refer all servicing to qualified service personnel.

9. MIC/TEL INPUT IMPEDANCE SELECTION

The Mic/Tel input impedance selector switch is set to 10 kΩ by the factory.
To change the setting to 600 Ω, set a jumper on the internal circuit board
to 600 Ω.
CAUTION
These servicing instructions are for use by qualified personnel only. To avoid electric shock, do not
perform any servicing other than that contained in the operating instructions unless you are qualified to
do so. Refer all servicing to qualified service personnel.

10. JUMPER WIRE SETTING

The amplifier is set by the factory to send AUX and Program inputs to both
the output terminals and MOH output terminals. This setting can be
changed as shown in the table below by cutting JP202 and JP203 jumpers
on the internal circuit board.
Cut of JP202 Outputs only the Program input.
(AUX input is cut off.)
Cut of JP203 Outputs both AUX and Program inputs.
CAUTION
These servicing instructions are for use by qualified personnel only. To avoid electric shock, do not
perform any servicing other than that contained in the operating instructions unless you are qualified to
do so. Refer all servicing to qualified service personnel.
Output terminal
[Factory-setting]
AUX
PGM.
[Factory-setting]
10 kΩ
[Factory-setting]
JP202
AUX
MOH output terminal
Outputs both AUX and Program inputs.
Outputs only the AUX input.
(Program input is cut off.)
MIC
MUTE
600 Ω
IMP.
JP203
PGM.
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