46
Keys
1
,
2
and
3
have three positions:
1. Position I (OFF) – top part of the required key (without inscription) is
pressed.
2. Position II– middle position.
3. PositionIII – bottom part of the required key (with inscription) is
pressed.
To turn on the system it is necessary to set key
1
to position II. In doing
so, green warning lamp
4
lights up; the system operates with limited output
power. To operate at maximum power key
1
should be set to position III.
To turn on flashing beacons it is necessary to set key
2
to position II. In
doing so, warning lamp
5
should light up.
To turn on siren key
2
should be set to position III and by means of key
3
set the required siren type:
— position I – long siren “W”;
— position II – short siren “Y”;
— position III – short siren “H”.
Siren signal of “Y” type can be also turned on by pushing horn button on
steering wheel.
For repeating vocal information microphone should be connected to sock
et
7
. Set key
2
to position I (OFF) and press speaking key on the microphone
body. It is possible to repeat information from tape recorder or radio set, for
this purpose their line “OUTPUT” should be connected to socket
8
.
Attention!
Lighting up of warning lamp
6
of red colour on signaling and loud
speaker system control desk indicates the system failure. Immediately shift key
1
in
position I (OFF) and check the system wiring.
Fig. 7.2.
Signaling and Loudspeaker System Control Desk
1 – power “ON” and “TEST” mode key; 2 – beacons and siren “ON” key; 3 – siren signal “ON”
key; 4 – power “ON” warning lamp; 5 – flashing beacon “ON” warning lamp; 6 – overload
warning lamp; 7 – microphone socket; 8 – tape recorder (radio set) socket
