Operating instructions

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VOLUME CONTROLS
The radio repeat volume (Radio) control is recessed in the
upper left hand corner of the front face. This should be set
when the vehicle is parked. First set the volume level of the
vehicle's two-way radio to its normal operating volume.
Adjust the siren's rotary selector switch into the RADIO
position. Insert a small, flat blade screwdriver into the
RADIO volume adjustment port. Turn clockwise direction
to increase the sound level.
The On/Off-PA volume control (PA) will both turn the
LCS770 unit on and off, as well as control the public address
volume. It is located in the upper right hand corner of the
front face. When the unit is not in use, you may elect to leave
this switch in the OFF position. Turn the switch counter
clockwise until it clicks. This will power down the unit and
will prevent accidental activation of any of the controls on the
face of the unit. Rotating it clockwise will power up the LCS770. As it is turned
clockwise, the outside volume of the PA will increase.
MICROPHONE
The attached noise-canceling microphone is used for public address operation and
overrides any siren tone when its push-to-talk (button on the side) is pressed.
AUXILIARY INPUT
During installation an auxiliary input may be connected to the vehicle horn ring or
other switching device. It provides the same operation as pressing the Horn button
or optionally (via internal jumpers) the Manual button.
PARK KILL (CUTOUT)
During installation, the Park Kill input may be connected to a door switch. It will
automatically turn off any siren tone when the door is opened. The siren tone will
continue to be cut off even when the door is closed. Changing any switch or input
will restore normal function.
SPEAKER DIAGNOSTICS
There are two diagnostic LED’s located beneath the MANUAL and HORN
push buttons. These LED’s will only turn on while a tone is trying to be
generated. Status of the speakers are indicated as follows:
Steady - Speaker is connected and operating
properly.
Flashing - There is an electrical short in the
speaker or wires to the speaker.
Off - No speaker is connected, or
- The siren is not activated to output a
tone to the speaker, or
- The speaker or wire connection is loose
or is electrically open